Modern-style tectonic cycle in earliest Proterozoic time: Petrogenesis of dioritic-granitic rocks from the Daqingshan–Wulashan Terrane, southern Yinshan Block, North China Craton
Archean granitoids provide us with an insight into the accretion and differentiation of early continental crust. We report the study of a dioritic to granitic rock association occurring in the Hongzhao region of the Daqingshan–Wulashan Terrane at the southern periphery of the Yinshan Block in wester...
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| Autor*in: |
Ouyang, Dongjian [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2020transfer abstract |
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| Übergeordnetes Werk: |
Enthalten in: Mechanism for anisotropic ejection of atoms from fcc (100) metal surface by low-energy argon ion bombardment: Molecular dynamics simulation - Zhu, Guo ELSEVIER, 2021, an international journal of mineralogy, petrology, and geochemistry, Amsterdam [u.a.] |
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| Übergeordnetes Werk: |
volume:352 ; year:2020 ; pages:0 |
| Links: |
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| DOI / URN: |
10.1016/j.lithos.2019.105322 |
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| Katalog-ID: |
ELV049147110 |
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| 245 | 1 | 0 | |a Modern-style tectonic cycle in earliest Proterozoic time: Petrogenesis of dioritic-granitic rocks from the Daqingshan–Wulashan Terrane, southern Yinshan Block, North China Craton |
| 264 | 1 | |c 2020transfer abstract | |
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| 520 | |a Archean granitoids provide us with an insight into the accretion and differentiation of early continental crust. We report the study of a dioritic to granitic rock association occurring in the Hongzhao region of the Daqingshan–Wulashan Terrane at the southern periphery of the Yinshan Block in western North China Craton. Zircon UPb dating reveals that the Hongzhao plutonic suite was emplaced within a short period (2.48–2.46 Ga) at the Archaean–Proterozoic transition. Four types of rocks have been identified based on their petrogeochemistry, which are K–rich diorite (KDG), Na–rich diorite (NDG), metaluminous monzogranite (MMG), and peraluminous syenogranite (PSG). First, the K–rich diorites are characterized by enrichment in both incompatible elements and transition elements with SiO2 contents of 63.4 to 57.2 wt%. Their dual geochemical character resembles the high–Ti sanukitoids, with strongly subchondritic isotopic compositions [εHf (t) = −0.8 to −5.6; εNd (t) =0.4 to −3.1] and high K2O/Na2O ratios (1.19–0.76), implying the contribution of older crustal materials in their origin. Combined with their high Y (46.9–17.9 ppm) and HREE (Yb = 4.35–1.62 ppm) abundances, the K–rich diorites were most likely derived from a mantle source previously enriched by melts from ancient terrigenous sediments at relatively lower pressures. Second, the Na-rich diorites show a crustal–derived, adakite affinity with moderate SiO2 (66.1–55.3 wt%) contents, high Na2O/K2O (8.51–3.17), Sr/Y (147–37), and (La/Yb)N (51–15) ratios, and low MgO (2.96–1.67 wt%), Cr (64–13 ppm), and Ni (38–6 ppm) contents. Na-rich diorites show evolved and homogeneous zircon εHf (t) (4.0–2.8) and whole–rock εNd (t) (3.6–1.2) values, indicating that they were most probably produced by partial melting of pre-existing mafic crust. Third, the metaluminous monzogranites exhibit high SiO2 contents and moderate REE fractionation with variably negative Eu anomalies. Evolved and homogeneous isotopic compositions [εHf (t) = 4.2 to 2.1 and εNd (t) = 1.7 to 1.6] suggest that the metaluminous monzogranites originated from partial melting of pre–existing continental rocks at shallow depth. Fourth, the peraluminous syenogranites show the highest SiO2 (77.3–68.6 wt%) contents and lowest CaO, ∑REE, and Y abundances, extremely high Sr/Y (up to 241), (La/Yb)N (up to 128) ratios, conspicuous positive Eu anomalies (Eu/Eu* = 6.49–0.91), and variable but negative–dominated εHf (t) (1.2 to −5.9) and εNd (t) (0.8 to −0.8) values... | ||
| 520 | |a Archean granitoids provide us with an insight into the accretion and differentiation of early continental crust. We report the study of a dioritic to granitic rock association occurring in the Hongzhao region of the Daqingshan–Wulashan Terrane at the southern periphery of the Yinshan Block in western North China Craton. Zircon UPb dating reveals that the Hongzhao plutonic suite was emplaced within a short period (2.48–2.46 Ga) at the Archaean–Proterozoic transition. Four types of rocks have been identified based on their petrogeochemistry, which are K–rich diorite (KDG), Na–rich diorite (NDG), metaluminous monzogranite (MMG), and peraluminous syenogranite (PSG). First, the K–rich diorites are characterized by enrichment in both incompatible elements and transition elements with SiO2 contents of 63.4 to 57.2 wt%. Their dual geochemical character resembles the high–Ti sanukitoids, with strongly subchondritic isotopic compositions [εHf (t) = −0.8 to −5.6; εNd (t) =0.4 to −3.1] and high K2O/Na2O ratios (1.19–0.76), implying the contribution of older crustal materials in their origin. Combined with their high Y (46.9–17.9 ppm) and HREE (Yb = 4.35–1.62 ppm) abundances, the K–rich diorites were most likely derived from a mantle source previously enriched by melts from ancient terrigenous sediments at relatively lower pressures. Second, the Na-rich diorites show a crustal–derived, adakite affinity with moderate SiO2 (66.1–55.3 wt%) contents, high Na2O/K2O (8.51–3.17), Sr/Y (147–37), and (La/Yb)N (51–15) ratios, and low MgO (2.96–1.67 wt%), Cr (64–13 ppm), and Ni (38–6 ppm) contents. Na-rich diorites show evolved and homogeneous zircon εHf (t) (4.0–2.8) and whole–rock εNd (t) (3.6–1.2) values, indicating that they were most probably produced by partial melting of pre-existing mafic crust. Third, the metaluminous monzogranites exhibit high SiO2 contents and moderate REE fractionation with variably negative Eu anomalies. Evolved and homogeneous isotopic compositions [εHf (t) = 4.2 to 2.1 and εNd (t) = 1.7 to 1.6] suggest that the metaluminous monzogranites originated from partial melting of pre–existing continental rocks at shallow depth. Fourth, the peraluminous syenogranites show the highest SiO2 (77.3–68.6 wt%) contents and lowest CaO, ∑REE, and Y abundances, extremely high Sr/Y (up to 241), (La/Yb)N (up to 128) ratios, conspicuous positive Eu anomalies (Eu/Eu* = 6.49–0.91), and variable but negative–dominated εHf (t) (1.2 to −5.9) and εNd (t) (0.8 to −0.8) values... | ||
| 700 | 1 | |a Guo, Jinghui |4 oth | |
| 773 | 0 | 8 | |i Enthalten in |n Elsevier Science |a Zhu, Guo ELSEVIER |t Mechanism for anisotropic ejection of atoms from fcc (100) metal surface by low-energy argon ion bombardment: Molecular dynamics simulation |d 2021 |d an international journal of mineralogy, petrology, and geochemistry |g Amsterdam [u.a.] |w (DE-627)ELV006642446 |
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10.1016/j.lithos.2019.105322 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000899.pica (DE-627)ELV049147110 (ELSEVIER)S0024-4937(19)30482-7 DE-627 ger DE-627 rakwb eng 530 VZ 58.19 bkl 33.09 bkl 52.78 bkl Ouyang, Dongjian verfasserin aut Modern-style tectonic cycle in earliest Proterozoic time: Petrogenesis of dioritic-granitic rocks from the Daqingshan–Wulashan Terrane, southern Yinshan Block, North China Craton 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Archean granitoids provide us with an insight into the accretion and differentiation of early continental crust. We report the study of a dioritic to granitic rock association occurring in the Hongzhao region of the Daqingshan–Wulashan Terrane at the southern periphery of the Yinshan Block in western North China Craton. Zircon UPb dating reveals that the Hongzhao plutonic suite was emplaced within a short period (2.48–2.46 Ga) at the Archaean–Proterozoic transition. Four types of rocks have been identified based on their petrogeochemistry, which are K–rich diorite (KDG), Na–rich diorite (NDG), metaluminous monzogranite (MMG), and peraluminous syenogranite (PSG). First, the K–rich diorites are characterized by enrichment in both incompatible elements and transition elements with SiO2 contents of 63.4 to 57.2 wt%. Their dual geochemical character resembles the high–Ti sanukitoids, with strongly subchondritic isotopic compositions [εHf (t) = −0.8 to −5.6; εNd (t) =0.4 to −3.1] and high K2O/Na2O ratios (1.19–0.76), implying the contribution of older crustal materials in their origin. Combined with their high Y (46.9–17.9 ppm) and HREE (Yb = 4.35–1.62 ppm) abundances, the K–rich diorites were most likely derived from a mantle source previously enriched by melts from ancient terrigenous sediments at relatively lower pressures. Second, the Na-rich diorites show a crustal–derived, adakite affinity with moderate SiO2 (66.1–55.3 wt%) contents, high Na2O/K2O (8.51–3.17), Sr/Y (147–37), and (La/Yb)N (51–15) ratios, and low MgO (2.96–1.67 wt%), Cr (64–13 ppm), and Ni (38–6 ppm) contents. Na-rich diorites show evolved and homogeneous zircon εHf (t) (4.0–2.8) and whole–rock εNd (t) (3.6–1.2) values, indicating that they were most probably produced by partial melting of pre-existing mafic crust. Third, the metaluminous monzogranites exhibit high SiO2 contents and moderate REE fractionation with variably negative Eu anomalies. Evolved and homogeneous isotopic compositions [εHf (t) = 4.2 to 2.1 and εNd (t) = 1.7 to 1.6] suggest that the metaluminous monzogranites originated from partial melting of pre–existing continental rocks at shallow depth. Fourth, the peraluminous syenogranites show the highest SiO2 (77.3–68.6 wt%) contents and lowest CaO, ∑REE, and Y abundances, extremely high Sr/Y (up to 241), (La/Yb)N (up to 128) ratios, conspicuous positive Eu anomalies (Eu/Eu* = 6.49–0.91), and variable but negative–dominated εHf (t) (1.2 to −5.9) and εNd (t) (0.8 to −0.8) values... Archean granitoids provide us with an insight into the accretion and differentiation of early continental crust. We report the study of a dioritic to granitic rock association occurring in the Hongzhao region of the Daqingshan–Wulashan Terrane at the southern periphery of the Yinshan Block in western North China Craton. Zircon UPb dating reveals that the Hongzhao plutonic suite was emplaced within a short period (2.48–2.46 Ga) at the Archaean–Proterozoic transition. Four types of rocks have been identified based on their petrogeochemistry, which are K–rich diorite (KDG), Na–rich diorite (NDG), metaluminous monzogranite (MMG), and peraluminous syenogranite (PSG). First, the K–rich diorites are characterized by enrichment in both incompatible elements and transition elements with SiO2 contents of 63.4 to 57.2 wt%. Their dual geochemical character resembles the high–Ti sanukitoids, with strongly subchondritic isotopic compositions [εHf (t) = −0.8 to −5.6; εNd (t) =0.4 to −3.1] and high K2O/Na2O ratios (1.19–0.76), implying the contribution of older crustal materials in their origin. Combined with their high Y (46.9–17.9 ppm) and HREE (Yb = 4.35–1.62 ppm) abundances, the K–rich diorites were most likely derived from a mantle source previously enriched by melts from ancient terrigenous sediments at relatively lower pressures. Second, the Na-rich diorites show a crustal–derived, adakite affinity with moderate SiO2 (66.1–55.3 wt%) contents, high Na2O/K2O (8.51–3.17), Sr/Y (147–37), and (La/Yb)N (51–15) ratios, and low MgO (2.96–1.67 wt%), Cr (64–13 ppm), and Ni (38–6 ppm) contents. Na-rich diorites show evolved and homogeneous zircon εHf (t) (4.0–2.8) and whole–rock εNd (t) (3.6–1.2) values, indicating that they were most probably produced by partial melting of pre-existing mafic crust. Third, the metaluminous monzogranites exhibit high SiO2 contents and moderate REE fractionation with variably negative Eu anomalies. Evolved and homogeneous isotopic compositions [εHf (t) = 4.2 to 2.1 and εNd (t) = 1.7 to 1.6] suggest that the metaluminous monzogranites originated from partial melting of pre–existing continental rocks at shallow depth. Fourth, the peraluminous syenogranites show the highest SiO2 (77.3–68.6 wt%) contents and lowest CaO, ∑REE, and Y abundances, extremely high Sr/Y (up to 241), (La/Yb)N (up to 128) ratios, conspicuous positive Eu anomalies (Eu/Eu* = 6.49–0.91), and variable but negative–dominated εHf (t) (1.2 to −5.9) and εNd (t) (0.8 to −0.8) values... Guo, Jinghui oth Enthalten in Elsevier Science Zhu, Guo ELSEVIER Mechanism for anisotropic ejection of atoms from fcc (100) metal surface by low-energy argon ion bombardment: Molecular dynamics simulation 2021 an international journal of mineralogy, petrology, and geochemistry Amsterdam [u.a.] (DE-627)ELV006642446 volume:352 year:2020 pages:0 https://doi.org/10.1016/j.lithos.2019.105322 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 58.19 Verfahrenstechnik: Sonstiges VZ 33.09 Physik unter besonderen Bedingungen VZ 52.78 Oberflächentechnik Wärmebehandlung VZ AR 352 2020 0 |
| spelling |
10.1016/j.lithos.2019.105322 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000899.pica (DE-627)ELV049147110 (ELSEVIER)S0024-4937(19)30482-7 DE-627 ger DE-627 rakwb eng 530 VZ 58.19 bkl 33.09 bkl 52.78 bkl Ouyang, Dongjian verfasserin aut Modern-style tectonic cycle in earliest Proterozoic time: Petrogenesis of dioritic-granitic rocks from the Daqingshan–Wulashan Terrane, southern Yinshan Block, North China Craton 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Archean granitoids provide us with an insight into the accretion and differentiation of early continental crust. We report the study of a dioritic to granitic rock association occurring in the Hongzhao region of the Daqingshan–Wulashan Terrane at the southern periphery of the Yinshan Block in western North China Craton. Zircon UPb dating reveals that the Hongzhao plutonic suite was emplaced within a short period (2.48–2.46 Ga) at the Archaean–Proterozoic transition. Four types of rocks have been identified based on their petrogeochemistry, which are K–rich diorite (KDG), Na–rich diorite (NDG), metaluminous monzogranite (MMG), and peraluminous syenogranite (PSG). First, the K–rich diorites are characterized by enrichment in both incompatible elements and transition elements with SiO2 contents of 63.4 to 57.2 wt%. Their dual geochemical character resembles the high–Ti sanukitoids, with strongly subchondritic isotopic compositions [εHf (t) = −0.8 to −5.6; εNd (t) =0.4 to −3.1] and high K2O/Na2O ratios (1.19–0.76), implying the contribution of older crustal materials in their origin. Combined with their high Y (46.9–17.9 ppm) and HREE (Yb = 4.35–1.62 ppm) abundances, the K–rich diorites were most likely derived from a mantle source previously enriched by melts from ancient terrigenous sediments at relatively lower pressures. Second, the Na-rich diorites show a crustal–derived, adakite affinity with moderate SiO2 (66.1–55.3 wt%) contents, high Na2O/K2O (8.51–3.17), Sr/Y (147–37), and (La/Yb)N (51–15) ratios, and low MgO (2.96–1.67 wt%), Cr (64–13 ppm), and Ni (38–6 ppm) contents. Na-rich diorites show evolved and homogeneous zircon εHf (t) (4.0–2.8) and whole–rock εNd (t) (3.6–1.2) values, indicating that they were most probably produced by partial melting of pre-existing mafic crust. Third, the metaluminous monzogranites exhibit high SiO2 contents and moderate REE fractionation with variably negative Eu anomalies. Evolved and homogeneous isotopic compositions [εHf (t) = 4.2 to 2.1 and εNd (t) = 1.7 to 1.6] suggest that the metaluminous monzogranites originated from partial melting of pre–existing continental rocks at shallow depth. Fourth, the peraluminous syenogranites show the highest SiO2 (77.3–68.6 wt%) contents and lowest CaO, ∑REE, and Y abundances, extremely high Sr/Y (up to 241), (La/Yb)N (up to 128) ratios, conspicuous positive Eu anomalies (Eu/Eu* = 6.49–0.91), and variable but negative–dominated εHf (t) (1.2 to −5.9) and εNd (t) (0.8 to −0.8) values... Archean granitoids provide us with an insight into the accretion and differentiation of early continental crust. We report the study of a dioritic to granitic rock association occurring in the Hongzhao region of the Daqingshan–Wulashan Terrane at the southern periphery of the Yinshan Block in western North China Craton. Zircon UPb dating reveals that the Hongzhao plutonic suite was emplaced within a short period (2.48–2.46 Ga) at the Archaean–Proterozoic transition. Four types of rocks have been identified based on their petrogeochemistry, which are K–rich diorite (KDG), Na–rich diorite (NDG), metaluminous monzogranite (MMG), and peraluminous syenogranite (PSG). First, the K–rich diorites are characterized by enrichment in both incompatible elements and transition elements with SiO2 contents of 63.4 to 57.2 wt%. Their dual geochemical character resembles the high–Ti sanukitoids, with strongly subchondritic isotopic compositions [εHf (t) = −0.8 to −5.6; εNd (t) =0.4 to −3.1] and high K2O/Na2O ratios (1.19–0.76), implying the contribution of older crustal materials in their origin. Combined with their high Y (46.9–17.9 ppm) and HREE (Yb = 4.35–1.62 ppm) abundances, the K–rich diorites were most likely derived from a mantle source previously enriched by melts from ancient terrigenous sediments at relatively lower pressures. Second, the Na-rich diorites show a crustal–derived, adakite affinity with moderate SiO2 (66.1–55.3 wt%) contents, high Na2O/K2O (8.51–3.17), Sr/Y (147–37), and (La/Yb)N (51–15) ratios, and low MgO (2.96–1.67 wt%), Cr (64–13 ppm), and Ni (38–6 ppm) contents. Na-rich diorites show evolved and homogeneous zircon εHf (t) (4.0–2.8) and whole–rock εNd (t) (3.6–1.2) values, indicating that they were most probably produced by partial melting of pre-existing mafic crust. Third, the metaluminous monzogranites exhibit high SiO2 contents and moderate REE fractionation with variably negative Eu anomalies. Evolved and homogeneous isotopic compositions [εHf (t) = 4.2 to 2.1 and εNd (t) = 1.7 to 1.6] suggest that the metaluminous monzogranites originated from partial melting of pre–existing continental rocks at shallow depth. Fourth, the peraluminous syenogranites show the highest SiO2 (77.3–68.6 wt%) contents and lowest CaO, ∑REE, and Y abundances, extremely high Sr/Y (up to 241), (La/Yb)N (up to 128) ratios, conspicuous positive Eu anomalies (Eu/Eu* = 6.49–0.91), and variable but negative–dominated εHf (t) (1.2 to −5.9) and εNd (t) (0.8 to −0.8) values... Guo, Jinghui oth Enthalten in Elsevier Science Zhu, Guo ELSEVIER Mechanism for anisotropic ejection of atoms from fcc (100) metal surface by low-energy argon ion bombardment: Molecular dynamics simulation 2021 an international journal of mineralogy, petrology, and geochemistry Amsterdam [u.a.] (DE-627)ELV006642446 volume:352 year:2020 pages:0 https://doi.org/10.1016/j.lithos.2019.105322 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 58.19 Verfahrenstechnik: Sonstiges VZ 33.09 Physik unter besonderen Bedingungen VZ 52.78 Oberflächentechnik Wärmebehandlung VZ AR 352 2020 0 |
| allfields_unstemmed |
10.1016/j.lithos.2019.105322 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000899.pica (DE-627)ELV049147110 (ELSEVIER)S0024-4937(19)30482-7 DE-627 ger DE-627 rakwb eng 530 VZ 58.19 bkl 33.09 bkl 52.78 bkl Ouyang, Dongjian verfasserin aut Modern-style tectonic cycle in earliest Proterozoic time: Petrogenesis of dioritic-granitic rocks from the Daqingshan–Wulashan Terrane, southern Yinshan Block, North China Craton 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Archean granitoids provide us with an insight into the accretion and differentiation of early continental crust. We report the study of a dioritic to granitic rock association occurring in the Hongzhao region of the Daqingshan–Wulashan Terrane at the southern periphery of the Yinshan Block in western North China Craton. Zircon UPb dating reveals that the Hongzhao plutonic suite was emplaced within a short period (2.48–2.46 Ga) at the Archaean–Proterozoic transition. Four types of rocks have been identified based on their petrogeochemistry, which are K–rich diorite (KDG), Na–rich diorite (NDG), metaluminous monzogranite (MMG), and peraluminous syenogranite (PSG). First, the K–rich diorites are characterized by enrichment in both incompatible elements and transition elements with SiO2 contents of 63.4 to 57.2 wt%. Their dual geochemical character resembles the high–Ti sanukitoids, with strongly subchondritic isotopic compositions [εHf (t) = −0.8 to −5.6; εNd (t) =0.4 to −3.1] and high K2O/Na2O ratios (1.19–0.76), implying the contribution of older crustal materials in their origin. Combined with their high Y (46.9–17.9 ppm) and HREE (Yb = 4.35–1.62 ppm) abundances, the K–rich diorites were most likely derived from a mantle source previously enriched by melts from ancient terrigenous sediments at relatively lower pressures. Second, the Na-rich diorites show a crustal–derived, adakite affinity with moderate SiO2 (66.1–55.3 wt%) contents, high Na2O/K2O (8.51–3.17), Sr/Y (147–37), and (La/Yb)N (51–15) ratios, and low MgO (2.96–1.67 wt%), Cr (64–13 ppm), and Ni (38–6 ppm) contents. Na-rich diorites show evolved and homogeneous zircon εHf (t) (4.0–2.8) and whole–rock εNd (t) (3.6–1.2) values, indicating that they were most probably produced by partial melting of pre-existing mafic crust. Third, the metaluminous monzogranites exhibit high SiO2 contents and moderate REE fractionation with variably negative Eu anomalies. Evolved and homogeneous isotopic compositions [εHf (t) = 4.2 to 2.1 and εNd (t) = 1.7 to 1.6] suggest that the metaluminous monzogranites originated from partial melting of pre–existing continental rocks at shallow depth. Fourth, the peraluminous syenogranites show the highest SiO2 (77.3–68.6 wt%) contents and lowest CaO, ∑REE, and Y abundances, extremely high Sr/Y (up to 241), (La/Yb)N (up to 128) ratios, conspicuous positive Eu anomalies (Eu/Eu* = 6.49–0.91), and variable but negative–dominated εHf (t) (1.2 to −5.9) and εNd (t) (0.8 to −0.8) values... Archean granitoids provide us with an insight into the accretion and differentiation of early continental crust. We report the study of a dioritic to granitic rock association occurring in the Hongzhao region of the Daqingshan–Wulashan Terrane at the southern periphery of the Yinshan Block in western North China Craton. Zircon UPb dating reveals that the Hongzhao plutonic suite was emplaced within a short period (2.48–2.46 Ga) at the Archaean–Proterozoic transition. Four types of rocks have been identified based on their petrogeochemistry, which are K–rich diorite (KDG), Na–rich diorite (NDG), metaluminous monzogranite (MMG), and peraluminous syenogranite (PSG). First, the K–rich diorites are characterized by enrichment in both incompatible elements and transition elements with SiO2 contents of 63.4 to 57.2 wt%. Their dual geochemical character resembles the high–Ti sanukitoids, with strongly subchondritic isotopic compositions [εHf (t) = −0.8 to −5.6; εNd (t) =0.4 to −3.1] and high K2O/Na2O ratios (1.19–0.76), implying the contribution of older crustal materials in their origin. Combined with their high Y (46.9–17.9 ppm) and HREE (Yb = 4.35–1.62 ppm) abundances, the K–rich diorites were most likely derived from a mantle source previously enriched by melts from ancient terrigenous sediments at relatively lower pressures. Second, the Na-rich diorites show a crustal–derived, adakite affinity with moderate SiO2 (66.1–55.3 wt%) contents, high Na2O/K2O (8.51–3.17), Sr/Y (147–37), and (La/Yb)N (51–15) ratios, and low MgO (2.96–1.67 wt%), Cr (64–13 ppm), and Ni (38–6 ppm) contents. Na-rich diorites show evolved and homogeneous zircon εHf (t) (4.0–2.8) and whole–rock εNd (t) (3.6–1.2) values, indicating that they were most probably produced by partial melting of pre-existing mafic crust. Third, the metaluminous monzogranites exhibit high SiO2 contents and moderate REE fractionation with variably negative Eu anomalies. Evolved and homogeneous isotopic compositions [εHf (t) = 4.2 to 2.1 and εNd (t) = 1.7 to 1.6] suggest that the metaluminous monzogranites originated from partial melting of pre–existing continental rocks at shallow depth. Fourth, the peraluminous syenogranites show the highest SiO2 (77.3–68.6 wt%) contents and lowest CaO, ∑REE, and Y abundances, extremely high Sr/Y (up to 241), (La/Yb)N (up to 128) ratios, conspicuous positive Eu anomalies (Eu/Eu* = 6.49–0.91), and variable but negative–dominated εHf (t) (1.2 to −5.9) and εNd (t) (0.8 to −0.8) values... Guo, Jinghui oth Enthalten in Elsevier Science Zhu, Guo ELSEVIER Mechanism for anisotropic ejection of atoms from fcc (100) metal surface by low-energy argon ion bombardment: Molecular dynamics simulation 2021 an international journal of mineralogy, petrology, and geochemistry Amsterdam [u.a.] (DE-627)ELV006642446 volume:352 year:2020 pages:0 https://doi.org/10.1016/j.lithos.2019.105322 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 58.19 Verfahrenstechnik: Sonstiges VZ 33.09 Physik unter besonderen Bedingungen VZ 52.78 Oberflächentechnik Wärmebehandlung VZ AR 352 2020 0 |
| allfieldsGer |
10.1016/j.lithos.2019.105322 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000899.pica (DE-627)ELV049147110 (ELSEVIER)S0024-4937(19)30482-7 DE-627 ger DE-627 rakwb eng 530 VZ 58.19 bkl 33.09 bkl 52.78 bkl Ouyang, Dongjian verfasserin aut Modern-style tectonic cycle in earliest Proterozoic time: Petrogenesis of dioritic-granitic rocks from the Daqingshan–Wulashan Terrane, southern Yinshan Block, North China Craton 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Archean granitoids provide us with an insight into the accretion and differentiation of early continental crust. We report the study of a dioritic to granitic rock association occurring in the Hongzhao region of the Daqingshan–Wulashan Terrane at the southern periphery of the Yinshan Block in western North China Craton. Zircon UPb dating reveals that the Hongzhao plutonic suite was emplaced within a short period (2.48–2.46 Ga) at the Archaean–Proterozoic transition. Four types of rocks have been identified based on their petrogeochemistry, which are K–rich diorite (KDG), Na–rich diorite (NDG), metaluminous monzogranite (MMG), and peraluminous syenogranite (PSG). First, the K–rich diorites are characterized by enrichment in both incompatible elements and transition elements with SiO2 contents of 63.4 to 57.2 wt%. Their dual geochemical character resembles the high–Ti sanukitoids, with strongly subchondritic isotopic compositions [εHf (t) = −0.8 to −5.6; εNd (t) =0.4 to −3.1] and high K2O/Na2O ratios (1.19–0.76), implying the contribution of older crustal materials in their origin. Combined with their high Y (46.9–17.9 ppm) and HREE (Yb = 4.35–1.62 ppm) abundances, the K–rich diorites were most likely derived from a mantle source previously enriched by melts from ancient terrigenous sediments at relatively lower pressures. Second, the Na-rich diorites show a crustal–derived, adakite affinity with moderate SiO2 (66.1–55.3 wt%) contents, high Na2O/K2O (8.51–3.17), Sr/Y (147–37), and (La/Yb)N (51–15) ratios, and low MgO (2.96–1.67 wt%), Cr (64–13 ppm), and Ni (38–6 ppm) contents. Na-rich diorites show evolved and homogeneous zircon εHf (t) (4.0–2.8) and whole–rock εNd (t) (3.6–1.2) values, indicating that they were most probably produced by partial melting of pre-existing mafic crust. Third, the metaluminous monzogranites exhibit high SiO2 contents and moderate REE fractionation with variably negative Eu anomalies. Evolved and homogeneous isotopic compositions [εHf (t) = 4.2 to 2.1 and εNd (t) = 1.7 to 1.6] suggest that the metaluminous monzogranites originated from partial melting of pre–existing continental rocks at shallow depth. Fourth, the peraluminous syenogranites show the highest SiO2 (77.3–68.6 wt%) contents and lowest CaO, ∑REE, and Y abundances, extremely high Sr/Y (up to 241), (La/Yb)N (up to 128) ratios, conspicuous positive Eu anomalies (Eu/Eu* = 6.49–0.91), and variable but negative–dominated εHf (t) (1.2 to −5.9) and εNd (t) (0.8 to −0.8) values... Archean granitoids provide us with an insight into the accretion and differentiation of early continental crust. We report the study of a dioritic to granitic rock association occurring in the Hongzhao region of the Daqingshan–Wulashan Terrane at the southern periphery of the Yinshan Block in western North China Craton. Zircon UPb dating reveals that the Hongzhao plutonic suite was emplaced within a short period (2.48–2.46 Ga) at the Archaean–Proterozoic transition. Four types of rocks have been identified based on their petrogeochemistry, which are K–rich diorite (KDG), Na–rich diorite (NDG), metaluminous monzogranite (MMG), and peraluminous syenogranite (PSG). First, the K–rich diorites are characterized by enrichment in both incompatible elements and transition elements with SiO2 contents of 63.4 to 57.2 wt%. Their dual geochemical character resembles the high–Ti sanukitoids, with strongly subchondritic isotopic compositions [εHf (t) = −0.8 to −5.6; εNd (t) =0.4 to −3.1] and high K2O/Na2O ratios (1.19–0.76), implying the contribution of older crustal materials in their origin. Combined with their high Y (46.9–17.9 ppm) and HREE (Yb = 4.35–1.62 ppm) abundances, the K–rich diorites were most likely derived from a mantle source previously enriched by melts from ancient terrigenous sediments at relatively lower pressures. Second, the Na-rich diorites show a crustal–derived, adakite affinity with moderate SiO2 (66.1–55.3 wt%) contents, high Na2O/K2O (8.51–3.17), Sr/Y (147–37), and (La/Yb)N (51–15) ratios, and low MgO (2.96–1.67 wt%), Cr (64–13 ppm), and Ni (38–6 ppm) contents. Na-rich diorites show evolved and homogeneous zircon εHf (t) (4.0–2.8) and whole–rock εNd (t) (3.6–1.2) values, indicating that they were most probably produced by partial melting of pre-existing mafic crust. Third, the metaluminous monzogranites exhibit high SiO2 contents and moderate REE fractionation with variably negative Eu anomalies. Evolved and homogeneous isotopic compositions [εHf (t) = 4.2 to 2.1 and εNd (t) = 1.7 to 1.6] suggest that the metaluminous monzogranites originated from partial melting of pre–existing continental rocks at shallow depth. Fourth, the peraluminous syenogranites show the highest SiO2 (77.3–68.6 wt%) contents and lowest CaO, ∑REE, and Y abundances, extremely high Sr/Y (up to 241), (La/Yb)N (up to 128) ratios, conspicuous positive Eu anomalies (Eu/Eu* = 6.49–0.91), and variable but negative–dominated εHf (t) (1.2 to −5.9) and εNd (t) (0.8 to −0.8) values... Guo, Jinghui oth Enthalten in Elsevier Science Zhu, Guo ELSEVIER Mechanism for anisotropic ejection of atoms from fcc (100) metal surface by low-energy argon ion bombardment: Molecular dynamics simulation 2021 an international journal of mineralogy, petrology, and geochemistry Amsterdam [u.a.] (DE-627)ELV006642446 volume:352 year:2020 pages:0 https://doi.org/10.1016/j.lithos.2019.105322 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 58.19 Verfahrenstechnik: Sonstiges VZ 33.09 Physik unter besonderen Bedingungen VZ 52.78 Oberflächentechnik Wärmebehandlung VZ AR 352 2020 0 |
| allfieldsSound |
10.1016/j.lithos.2019.105322 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000899.pica (DE-627)ELV049147110 (ELSEVIER)S0024-4937(19)30482-7 DE-627 ger DE-627 rakwb eng 530 VZ 58.19 bkl 33.09 bkl 52.78 bkl Ouyang, Dongjian verfasserin aut Modern-style tectonic cycle in earliest Proterozoic time: Petrogenesis of dioritic-granitic rocks from the Daqingshan–Wulashan Terrane, southern Yinshan Block, North China Craton 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Archean granitoids provide us with an insight into the accretion and differentiation of early continental crust. We report the study of a dioritic to granitic rock association occurring in the Hongzhao region of the Daqingshan–Wulashan Terrane at the southern periphery of the Yinshan Block in western North China Craton. Zircon UPb dating reveals that the Hongzhao plutonic suite was emplaced within a short period (2.48–2.46 Ga) at the Archaean–Proterozoic transition. Four types of rocks have been identified based on their petrogeochemistry, which are K–rich diorite (KDG), Na–rich diorite (NDG), metaluminous monzogranite (MMG), and peraluminous syenogranite (PSG). First, the K–rich diorites are characterized by enrichment in both incompatible elements and transition elements with SiO2 contents of 63.4 to 57.2 wt%. Their dual geochemical character resembles the high–Ti sanukitoids, with strongly subchondritic isotopic compositions [εHf (t) = −0.8 to −5.6; εNd (t) =0.4 to −3.1] and high K2O/Na2O ratios (1.19–0.76), implying the contribution of older crustal materials in their origin. Combined with their high Y (46.9–17.9 ppm) and HREE (Yb = 4.35–1.62 ppm) abundances, the K–rich diorites were most likely derived from a mantle source previously enriched by melts from ancient terrigenous sediments at relatively lower pressures. Second, the Na-rich diorites show a crustal–derived, adakite affinity with moderate SiO2 (66.1–55.3 wt%) contents, high Na2O/K2O (8.51–3.17), Sr/Y (147–37), and (La/Yb)N (51–15) ratios, and low MgO (2.96–1.67 wt%), Cr (64–13 ppm), and Ni (38–6 ppm) contents. Na-rich diorites show evolved and homogeneous zircon εHf (t) (4.0–2.8) and whole–rock εNd (t) (3.6–1.2) values, indicating that they were most probably produced by partial melting of pre-existing mafic crust. Third, the metaluminous monzogranites exhibit high SiO2 contents and moderate REE fractionation with variably negative Eu anomalies. Evolved and homogeneous isotopic compositions [εHf (t) = 4.2 to 2.1 and εNd (t) = 1.7 to 1.6] suggest that the metaluminous monzogranites originated from partial melting of pre–existing continental rocks at shallow depth. Fourth, the peraluminous syenogranites show the highest SiO2 (77.3–68.6 wt%) contents and lowest CaO, ∑REE, and Y abundances, extremely high Sr/Y (up to 241), (La/Yb)N (up to 128) ratios, conspicuous positive Eu anomalies (Eu/Eu* = 6.49–0.91), and variable but negative–dominated εHf (t) (1.2 to −5.9) and εNd (t) (0.8 to −0.8) values... Archean granitoids provide us with an insight into the accretion and differentiation of early continental crust. We report the study of a dioritic to granitic rock association occurring in the Hongzhao region of the Daqingshan–Wulashan Terrane at the southern periphery of the Yinshan Block in western North China Craton. Zircon UPb dating reveals that the Hongzhao plutonic suite was emplaced within a short period (2.48–2.46 Ga) at the Archaean–Proterozoic transition. Four types of rocks have been identified based on their petrogeochemistry, which are K–rich diorite (KDG), Na–rich diorite (NDG), metaluminous monzogranite (MMG), and peraluminous syenogranite (PSG). First, the K–rich diorites are characterized by enrichment in both incompatible elements and transition elements with SiO2 contents of 63.4 to 57.2 wt%. Their dual geochemical character resembles the high–Ti sanukitoids, with strongly subchondritic isotopic compositions [εHf (t) = −0.8 to −5.6; εNd (t) =0.4 to −3.1] and high K2O/Na2O ratios (1.19–0.76), implying the contribution of older crustal materials in their origin. Combined with their high Y (46.9–17.9 ppm) and HREE (Yb = 4.35–1.62 ppm) abundances, the K–rich diorites were most likely derived from a mantle source previously enriched by melts from ancient terrigenous sediments at relatively lower pressures. Second, the Na-rich diorites show a crustal–derived, adakite affinity with moderate SiO2 (66.1–55.3 wt%) contents, high Na2O/K2O (8.51–3.17), Sr/Y (147–37), and (La/Yb)N (51–15) ratios, and low MgO (2.96–1.67 wt%), Cr (64–13 ppm), and Ni (38–6 ppm) contents. Na-rich diorites show evolved and homogeneous zircon εHf (t) (4.0–2.8) and whole–rock εNd (t) (3.6–1.2) values, indicating that they were most probably produced by partial melting of pre-existing mafic crust. Third, the metaluminous monzogranites exhibit high SiO2 contents and moderate REE fractionation with variably negative Eu anomalies. Evolved and homogeneous isotopic compositions [εHf (t) = 4.2 to 2.1 and εNd (t) = 1.7 to 1.6] suggest that the metaluminous monzogranites originated from partial melting of pre–existing continental rocks at shallow depth. Fourth, the peraluminous syenogranites show the highest SiO2 (77.3–68.6 wt%) contents and lowest CaO, ∑REE, and Y abundances, extremely high Sr/Y (up to 241), (La/Yb)N (up to 128) ratios, conspicuous positive Eu anomalies (Eu/Eu* = 6.49–0.91), and variable but negative–dominated εHf (t) (1.2 to −5.9) and εNd (t) (0.8 to −0.8) values... Guo, Jinghui oth Enthalten in Elsevier Science Zhu, Guo ELSEVIER Mechanism for anisotropic ejection of atoms from fcc (100) metal surface by low-energy argon ion bombardment: Molecular dynamics simulation 2021 an international journal of mineralogy, petrology, and geochemistry Amsterdam [u.a.] (DE-627)ELV006642446 volume:352 year:2020 pages:0 https://doi.org/10.1016/j.lithos.2019.105322 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 58.19 Verfahrenstechnik: Sonstiges VZ 33.09 Physik unter besonderen Bedingungen VZ 52.78 Oberflächentechnik Wärmebehandlung VZ AR 352 2020 0 |
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Enthalten in Mechanism for anisotropic ejection of atoms from fcc (100) metal surface by low-energy argon ion bombardment: Molecular dynamics simulation Amsterdam [u.a.] volume:352 year:2020 pages:0 |
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Enthalten in Mechanism for anisotropic ejection of atoms from fcc (100) metal surface by low-energy argon ion bombardment: Molecular dynamics simulation Amsterdam [u.a.] volume:352 year:2020 pages:0 |
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Mechanism for anisotropic ejection of atoms from fcc (100) metal surface by low-energy argon ion bombardment: Molecular dynamics simulation |
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Ouyang, Dongjian @@aut@@ Guo, Jinghui @@oth@@ |
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We report the study of a dioritic to granitic rock association occurring in the Hongzhao region of the Daqingshan–Wulashan Terrane at the southern periphery of the Yinshan Block in western North China Craton. Zircon UPb dating reveals that the Hongzhao plutonic suite was emplaced within a short period (2.48–2.46 Ga) at the Archaean–Proterozoic transition. Four types of rocks have been identified based on their petrogeochemistry, which are K–rich diorite (KDG), Na–rich diorite (NDG), metaluminous monzogranite (MMG), and peraluminous syenogranite (PSG). First, the K–rich diorites are characterized by enrichment in both incompatible elements and transition elements with SiO2 contents of 63.4 to 57.2 wt%. Their dual geochemical character resembles the high–Ti sanukitoids, with strongly subchondritic isotopic compositions [εHf (t) = −0.8 to −5.6; εNd (t) =0.4 to −3.1] and high K2O/Na2O ratios (1.19–0.76), implying the contribution of older crustal materials in their origin. Combined with their high Y (46.9–17.9 ppm) and HREE (Yb = 4.35–1.62 ppm) abundances, the K–rich diorites were most likely derived from a mantle source previously enriched by melts from ancient terrigenous sediments at relatively lower pressures. Second, the Na-rich diorites show a crustal–derived, adakite affinity with moderate SiO2 (66.1–55.3 wt%) contents, high Na2O/K2O (8.51–3.17), Sr/Y (147–37), and (La/Yb)N (51–15) ratios, and low MgO (2.96–1.67 wt%), Cr (64–13 ppm), and Ni (38–6 ppm) contents. Na-rich diorites show evolved and homogeneous zircon εHf (t) (4.0–2.8) and whole–rock εNd (t) (3.6–1.2) values, indicating that they were most probably produced by partial melting of pre-existing mafic crust. Third, the metaluminous monzogranites exhibit high SiO2 contents and moderate REE fractionation with variably negative Eu anomalies. Evolved and homogeneous isotopic compositions [εHf (t) = 4.2 to 2.1 and εNd (t) = 1.7 to 1.6] suggest that the metaluminous monzogranites originated from partial melting of pre–existing continental rocks at shallow depth. Fourth, the peraluminous syenogranites show the highest SiO2 (77.3–68.6 wt%) contents and lowest CaO, ∑REE, and Y abundances, extremely high Sr/Y (up to 241), (La/Yb)N (up to 128) ratios, conspicuous positive Eu anomalies (Eu/Eu* = 6.49–0.91), and variable but negative–dominated εHf (t) (1.2 to −5.9) and εNd (t) (0.8 to −0.8) values...</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Archean granitoids provide us with an insight into the accretion and differentiation of early continental crust. We report the study of a dioritic to granitic rock association occurring in the Hongzhao region of the Daqingshan–Wulashan Terrane at the southern periphery of the Yinshan Block in western North China Craton. Zircon UPb dating reveals that the Hongzhao plutonic suite was emplaced within a short period (2.48–2.46 Ga) at the Archaean–Proterozoic transition. Four types of rocks have been identified based on their petrogeochemistry, which are K–rich diorite (KDG), Na–rich diorite (NDG), metaluminous monzogranite (MMG), and peraluminous syenogranite (PSG). First, the K–rich diorites are characterized by enrichment in both incompatible elements and transition elements with SiO2 contents of 63.4 to 57.2 wt%. Their dual geochemical character resembles the high–Ti sanukitoids, with strongly subchondritic isotopic compositions [εHf (t) = −0.8 to −5.6; εNd (t) =0.4 to −3.1] and high K2O/Na2O ratios (1.19–0.76), implying the contribution of older crustal materials in their origin. Combined with their high Y (46.9–17.9 ppm) and HREE (Yb = 4.35–1.62 ppm) abundances, the K–rich diorites were most likely derived from a mantle source previously enriched by melts from ancient terrigenous sediments at relatively lower pressures. Second, the Na-rich diorites show a crustal–derived, adakite affinity with moderate SiO2 (66.1–55.3 wt%) contents, high Na2O/K2O (8.51–3.17), Sr/Y (147–37), and (La/Yb)N (51–15) ratios, and low MgO (2.96–1.67 wt%), Cr (64–13 ppm), and Ni (38–6 ppm) contents. Na-rich diorites show evolved and homogeneous zircon εHf (t) (4.0–2.8) and whole–rock εNd (t) (3.6–1.2) values, indicating that they were most probably produced by partial melting of pre-existing mafic crust. Third, the metaluminous monzogranites exhibit high SiO2 contents and moderate REE fractionation with variably negative Eu anomalies. Evolved and homogeneous isotopic compositions [εHf (t) = 4.2 to 2.1 and εNd (t) = 1.7 to 1.6] suggest that the metaluminous monzogranites originated from partial melting of pre–existing continental rocks at shallow depth. 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Modern-style tectonic cycle in earliest Proterozoic time: Petrogenesis of dioritic-granitic rocks from the Daqingshan–Wulashan Terrane, southern Yinshan Block, North China Craton |
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modern-style tectonic cycle in earliest proterozoic time: petrogenesis of dioritic-granitic rocks from the daqingshan–wulashan terrane, southern yinshan block, north china craton |
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Modern-style tectonic cycle in earliest Proterozoic time: Petrogenesis of dioritic-granitic rocks from the Daqingshan–Wulashan Terrane, southern Yinshan Block, North China Craton |
| abstract |
Archean granitoids provide us with an insight into the accretion and differentiation of early continental crust. We report the study of a dioritic to granitic rock association occurring in the Hongzhao region of the Daqingshan–Wulashan Terrane at the southern periphery of the Yinshan Block in western North China Craton. Zircon UPb dating reveals that the Hongzhao plutonic suite was emplaced within a short period (2.48–2.46 Ga) at the Archaean–Proterozoic transition. Four types of rocks have been identified based on their petrogeochemistry, which are K–rich diorite (KDG), Na–rich diorite (NDG), metaluminous monzogranite (MMG), and peraluminous syenogranite (PSG). First, the K–rich diorites are characterized by enrichment in both incompatible elements and transition elements with SiO2 contents of 63.4 to 57.2 wt%. Their dual geochemical character resembles the high–Ti sanukitoids, with strongly subchondritic isotopic compositions [εHf (t) = −0.8 to −5.6; εNd (t) =0.4 to −3.1] and high K2O/Na2O ratios (1.19–0.76), implying the contribution of older crustal materials in their origin. Combined with their high Y (46.9–17.9 ppm) and HREE (Yb = 4.35–1.62 ppm) abundances, the K–rich diorites were most likely derived from a mantle source previously enriched by melts from ancient terrigenous sediments at relatively lower pressures. Second, the Na-rich diorites show a crustal–derived, adakite affinity with moderate SiO2 (66.1–55.3 wt%) contents, high Na2O/K2O (8.51–3.17), Sr/Y (147–37), and (La/Yb)N (51–15) ratios, and low MgO (2.96–1.67 wt%), Cr (64–13 ppm), and Ni (38–6 ppm) contents. Na-rich diorites show evolved and homogeneous zircon εHf (t) (4.0–2.8) and whole–rock εNd (t) (3.6–1.2) values, indicating that they were most probably produced by partial melting of pre-existing mafic crust. Third, the metaluminous monzogranites exhibit high SiO2 contents and moderate REE fractionation with variably negative Eu anomalies. Evolved and homogeneous isotopic compositions [εHf (t) = 4.2 to 2.1 and εNd (t) = 1.7 to 1.6] suggest that the metaluminous monzogranites originated from partial melting of pre–existing continental rocks at shallow depth. Fourth, the peraluminous syenogranites show the highest SiO2 (77.3–68.6 wt%) contents and lowest CaO, ∑REE, and Y abundances, extremely high Sr/Y (up to 241), (La/Yb)N (up to 128) ratios, conspicuous positive Eu anomalies (Eu/Eu* = 6.49–0.91), and variable but negative–dominated εHf (t) (1.2 to −5.9) and εNd (t) (0.8 to −0.8) values... |
| abstractGer |
Archean granitoids provide us with an insight into the accretion and differentiation of early continental crust. We report the study of a dioritic to granitic rock association occurring in the Hongzhao region of the Daqingshan–Wulashan Terrane at the southern periphery of the Yinshan Block in western North China Craton. Zircon UPb dating reveals that the Hongzhao plutonic suite was emplaced within a short period (2.48–2.46 Ga) at the Archaean–Proterozoic transition. Four types of rocks have been identified based on their petrogeochemistry, which are K–rich diorite (KDG), Na–rich diorite (NDG), metaluminous monzogranite (MMG), and peraluminous syenogranite (PSG). First, the K–rich diorites are characterized by enrichment in both incompatible elements and transition elements with SiO2 contents of 63.4 to 57.2 wt%. Their dual geochemical character resembles the high–Ti sanukitoids, with strongly subchondritic isotopic compositions [εHf (t) = −0.8 to −5.6; εNd (t) =0.4 to −3.1] and high K2O/Na2O ratios (1.19–0.76), implying the contribution of older crustal materials in their origin. Combined with their high Y (46.9–17.9 ppm) and HREE (Yb = 4.35–1.62 ppm) abundances, the K–rich diorites were most likely derived from a mantle source previously enriched by melts from ancient terrigenous sediments at relatively lower pressures. Second, the Na-rich diorites show a crustal–derived, adakite affinity with moderate SiO2 (66.1–55.3 wt%) contents, high Na2O/K2O (8.51–3.17), Sr/Y (147–37), and (La/Yb)N (51–15) ratios, and low MgO (2.96–1.67 wt%), Cr (64–13 ppm), and Ni (38–6 ppm) contents. Na-rich diorites show evolved and homogeneous zircon εHf (t) (4.0–2.8) and whole–rock εNd (t) (3.6–1.2) values, indicating that they were most probably produced by partial melting of pre-existing mafic crust. Third, the metaluminous monzogranites exhibit high SiO2 contents and moderate REE fractionation with variably negative Eu anomalies. Evolved and homogeneous isotopic compositions [εHf (t) = 4.2 to 2.1 and εNd (t) = 1.7 to 1.6] suggest that the metaluminous monzogranites originated from partial melting of pre–existing continental rocks at shallow depth. Fourth, the peraluminous syenogranites show the highest SiO2 (77.3–68.6 wt%) contents and lowest CaO, ∑REE, and Y abundances, extremely high Sr/Y (up to 241), (La/Yb)N (up to 128) ratios, conspicuous positive Eu anomalies (Eu/Eu* = 6.49–0.91), and variable but negative–dominated εHf (t) (1.2 to −5.9) and εNd (t) (0.8 to −0.8) values... |
| abstract_unstemmed |
Archean granitoids provide us with an insight into the accretion and differentiation of early continental crust. We report the study of a dioritic to granitic rock association occurring in the Hongzhao region of the Daqingshan–Wulashan Terrane at the southern periphery of the Yinshan Block in western North China Craton. Zircon UPb dating reveals that the Hongzhao plutonic suite was emplaced within a short period (2.48–2.46 Ga) at the Archaean–Proterozoic transition. Four types of rocks have been identified based on their petrogeochemistry, which are K–rich diorite (KDG), Na–rich diorite (NDG), metaluminous monzogranite (MMG), and peraluminous syenogranite (PSG). First, the K–rich diorites are characterized by enrichment in both incompatible elements and transition elements with SiO2 contents of 63.4 to 57.2 wt%. Their dual geochemical character resembles the high–Ti sanukitoids, with strongly subchondritic isotopic compositions [εHf (t) = −0.8 to −5.6; εNd (t) =0.4 to −3.1] and high K2O/Na2O ratios (1.19–0.76), implying the contribution of older crustal materials in their origin. Combined with their high Y (46.9–17.9 ppm) and HREE (Yb = 4.35–1.62 ppm) abundances, the K–rich diorites were most likely derived from a mantle source previously enriched by melts from ancient terrigenous sediments at relatively lower pressures. Second, the Na-rich diorites show a crustal–derived, adakite affinity with moderate SiO2 (66.1–55.3 wt%) contents, high Na2O/K2O (8.51–3.17), Sr/Y (147–37), and (La/Yb)N (51–15) ratios, and low MgO (2.96–1.67 wt%), Cr (64–13 ppm), and Ni (38–6 ppm) contents. Na-rich diorites show evolved and homogeneous zircon εHf (t) (4.0–2.8) and whole–rock εNd (t) (3.6–1.2) values, indicating that they were most probably produced by partial melting of pre-existing mafic crust. Third, the metaluminous monzogranites exhibit high SiO2 contents and moderate REE fractionation with variably negative Eu anomalies. Evolved and homogeneous isotopic compositions [εHf (t) = 4.2 to 2.1 and εNd (t) = 1.7 to 1.6] suggest that the metaluminous monzogranites originated from partial melting of pre–existing continental rocks at shallow depth. Fourth, the peraluminous syenogranites show the highest SiO2 (77.3–68.6 wt%) contents and lowest CaO, ∑REE, and Y abundances, extremely high Sr/Y (up to 241), (La/Yb)N (up to 128) ratios, conspicuous positive Eu anomalies (Eu/Eu* = 6.49–0.91), and variable but negative–dominated εHf (t) (1.2 to −5.9) and εNd (t) (0.8 to −0.8) values... |
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Modern-style tectonic cycle in earliest Proterozoic time: Petrogenesis of dioritic-granitic rocks from the Daqingshan–Wulashan Terrane, southern Yinshan Block, North China Craton |
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Evolved and homogeneous isotopic compositions [εHf (t) = 4.2 to 2.1 and εNd (t) = 1.7 to 1.6] suggest that the metaluminous monzogranites originated from partial melting of pre–existing continental rocks at shallow depth. Fourth, the peraluminous syenogranites show the highest SiO2 (77.3–68.6 wt%) contents and lowest CaO, ∑REE, and Y abundances, extremely high Sr/Y (up to 241), (La/Yb)N (up to 128) ratios, conspicuous positive Eu anomalies (Eu/Eu* = 6.49–0.91), and variable but negative–dominated εHf (t) (1.2 to −5.9) and εNd (t) (0.8 to −0.8) values...</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Archean granitoids provide us with an insight into the accretion and differentiation of early continental crust. We report the study of a dioritic to granitic rock association occurring in the Hongzhao region of the Daqingshan–Wulashan Terrane at the southern periphery of the Yinshan Block in western North China Craton. Zircon UPb dating reveals that the Hongzhao plutonic suite was emplaced within a short period (2.48–2.46 Ga) at the Archaean–Proterozoic transition. Four types of rocks have been identified based on their petrogeochemistry, which are K–rich diorite (KDG), Na–rich diorite (NDG), metaluminous monzogranite (MMG), and peraluminous syenogranite (PSG). First, the K–rich diorites are characterized by enrichment in both incompatible elements and transition elements with SiO2 contents of 63.4 to 57.2 wt%. Their dual geochemical character resembles the high–Ti sanukitoids, with strongly subchondritic isotopic compositions [εHf (t) = −0.8 to −5.6; εNd (t) =0.4 to −3.1] and high K2O/Na2O ratios (1.19–0.76), implying the contribution of older crustal materials in their origin. Combined with their high Y (46.9–17.9 ppm) and HREE (Yb = 4.35–1.62 ppm) abundances, the K–rich diorites were most likely derived from a mantle source previously enriched by melts from ancient terrigenous sediments at relatively lower pressures. Second, the Na-rich diorites show a crustal–derived, adakite affinity with moderate SiO2 (66.1–55.3 wt%) contents, high Na2O/K2O (8.51–3.17), Sr/Y (147–37), and (La/Yb)N (51–15) ratios, and low MgO (2.96–1.67 wt%), Cr (64–13 ppm), and Ni (38–6 ppm) contents. Na-rich diorites show evolved and homogeneous zircon εHf (t) (4.0–2.8) and whole–rock εNd (t) (3.6–1.2) values, indicating that they were most probably produced by partial melting of pre-existing mafic crust. Third, the metaluminous monzogranites exhibit high SiO2 contents and moderate REE fractionation with variably negative Eu anomalies. Evolved and homogeneous isotopic compositions [εHf (t) = 4.2 to 2.1 and εNd (t) = 1.7 to 1.6] suggest that the metaluminous monzogranites originated from partial melting of pre–existing continental rocks at shallow depth. Fourth, the peraluminous syenogranites show the highest SiO2 (77.3–68.6 wt%) contents and lowest CaO, ∑REE, and Y abundances, extremely high Sr/Y (up to 241), (La/Yb)N (up to 128) ratios, conspicuous positive Eu anomalies (Eu/Eu* = 6.49–0.91), and variable but negative–dominated εHf (t) (1.2 to −5.9) and εNd (t) (0.8 to −0.8) values...</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Guo, Jinghui</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="n">Elsevier Science</subfield><subfield code="a">Zhu, Guo ELSEVIER</subfield><subfield code="t">Mechanism for anisotropic ejection of atoms from fcc (100) metal surface by low-energy argon ion bombardment: Molecular dynamics simulation</subfield><subfield code="d">2021</subfield><subfield code="d">an international journal of mineralogy, petrology, and geochemistry</subfield><subfield code="g">Amsterdam [u.a.]</subfield><subfield code="w">(DE-627)ELV006642446</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:352</subfield><subfield code="g">year:2020</subfield><subfield code="g">pages:0</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://doi.org/10.1016/j.lithos.2019.105322</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_U</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ELV</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_U</subfield></datafield><datafield tag="936" ind1="b" ind2="k"><subfield code="a">58.19</subfield><subfield code="j">Verfahrenstechnik: Sonstiges</subfield><subfield code="q">VZ</subfield></datafield><datafield tag="936" ind1="b" ind2="k"><subfield code="a">33.09</subfield><subfield code="j">Physik unter besonderen Bedingungen</subfield><subfield code="q">VZ</subfield></datafield><datafield tag="936" ind1="b" ind2="k"><subfield code="a">52.78</subfield><subfield code="j">Oberflächentechnik</subfield><subfield code="j">Wärmebehandlung</subfield><subfield code="q">VZ</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">352</subfield><subfield code="j">2020</subfield><subfield code="h">0</subfield></datafield></record></collection>
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