Thermal modelling of very long-lived (>140 Myr) high thermal gradient metamorphism as a result of radiogenic heating in the Reynolds Range, central Australia
The Reynolds Range in the Paleo-Mesoproterozoic Aileron Province of central Australia exposes a differentially exhumed metamorphic rock system varying from greenschist-to granulite-facies. Calculated P–T pseudosections indicate that peak metamorphic conditions in greenschist-facies areas reached tem...
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| Autor*in: |
Alessio, Kiara L. [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2020transfer abstract |
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| Schlagwörter: |
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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.2019.105280 |
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ELV04914698X |
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| 245 | 1 | 0 | |a Thermal modelling of very long-lived (>140 Myr) high thermal gradient metamorphism as a result of radiogenic heating in the Reynolds Range, central Australia |
| 264 | 1 | |c 2020transfer abstract | |
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| 520 | |a The Reynolds Range in the Paleo-Mesoproterozoic Aileron Province of central Australia exposes a differentially exhumed metamorphic rock system varying from greenschist-to granulite-facies. Calculated P–T pseudosections indicate that peak metamorphic conditions in greenschist-facies areas reached temperatures of ∼480 °C and pressures of 3.2–5 kbar. Peak conditions at amphibolite-facies are constrained to 500–620 °C and 1.3–3.8 kbar. P–T modelling of two petrologically different granulite-facies samples indicate that peak conditions in the exhumed granulite-facies rocks reached 780–920 °C and 3.5–5.4 kbar, corresponding to high apparent thermal gradients of 152–218 °C/kbar. In the amphibolite-facies rocks, in situ LA–ICP–MS U–Pb monazite geochronology records ages that range between 1680 and 1550 Ma. In contrast, in the granulite-facies rocks, monazite records ages of ca. 1560 Ma. The terrane contains significantly elevated rates of crustal heat production compared to global norms, and when incorporated into lithospheric thermal models with reasonable boundary conditions and average thermal properties, can plausibly account for the long-lasting metamorphic conditions. The thermal modelling shows that the long lasting (>100 Myr) record of monazite U–Pb ages, supported by previous studies, reflects a continuous duration of elevated crustal temperatures, an interpretation consistent with texturally simple mineral assemblages that lack any evidence for polymetamorphism. In high-crustal heat production terranes, high thermal gradients and high temperatures will persist until exhumation removes the upper crust. This physical reality provides a basis for the existence of arbitrarily long-lived metamorphic systems, even under high thermal gradients that are generally considered to be thermally anomalous. However, such thermal anomalism is not remarkable, as there is abundant evidence for elevated rates of crustal heat production in the Reynolds Range and worldwide. In terranes where accessory minerals record large continuous ranges of age, robust volumetric measurements of crustal heat production rates are a necessary step in evaluating the potential thermal significance of such geochronological records. Failure to document rates of crustal heat generation invalidates many interpretations for drivers of metamorphism. | ||
| 520 | |a The Reynolds Range in the Paleo-Mesoproterozoic Aileron Province of central Australia exposes a differentially exhumed metamorphic rock system varying from greenschist-to granulite-facies. Calculated P–T pseudosections indicate that peak metamorphic conditions in greenschist-facies areas reached temperatures of ∼480 °C and pressures of 3.2–5 kbar. Peak conditions at amphibolite-facies are constrained to 500–620 °C and 1.3–3.8 kbar. P–T modelling of two petrologically different granulite-facies samples indicate that peak conditions in the exhumed granulite-facies rocks reached 780–920 °C and 3.5–5.4 kbar, corresponding to high apparent thermal gradients of 152–218 °C/kbar. In the amphibolite-facies rocks, in situ LA–ICP–MS U–Pb monazite geochronology records ages that range between 1680 and 1550 Ma. In contrast, in the granulite-facies rocks, monazite records ages of ca. 1560 Ma. The terrane contains significantly elevated rates of crustal heat production compared to global norms, and when incorporated into lithospheric thermal models with reasonable boundary conditions and average thermal properties, can plausibly account for the long-lasting metamorphic conditions. The thermal modelling shows that the long lasting (>100 Myr) record of monazite U–Pb ages, supported by previous studies, reflects a continuous duration of elevated crustal temperatures, an interpretation consistent with texturally simple mineral assemblages that lack any evidence for polymetamorphism. In high-crustal heat production terranes, high thermal gradients and high temperatures will persist until exhumation removes the upper crust. This physical reality provides a basis for the existence of arbitrarily long-lived metamorphic systems, even under high thermal gradients that are generally considered to be thermally anomalous. However, such thermal anomalism is not remarkable, as there is abundant evidence for elevated rates of crustal heat production in the Reynolds Range and worldwide. In terranes where accessory minerals record large continuous ranges of age, robust volumetric measurements of crustal heat production rates are a necessary step in evaluating the potential thermal significance of such geochronological records. Failure to document rates of crustal heat generation invalidates many interpretations for drivers of metamorphism. | ||
| 650 | 7 | |a Geochronology |2 Elsevier | |
| 650 | 7 | |a Heat production |2 Elsevier | |
| 650 | 7 | |a Phase equilibria modelling |2 Elsevier | |
| 650 | 7 | |a Metamorphic |2 Elsevier | |
| 650 | 7 | |a Thermal modelling |2 Elsevier | |
| 700 | 1 | |a Hand, Martin |4 oth | |
| 700 | 1 | |a Hasterok, Derrick |4 oth | |
| 700 | 1 | |a Morrissey, Laura J. |4 oth | |
| 700 | 1 | |a Kelsey, David E. |4 oth | |
| 700 | 1 | |a Raimondo, Tom |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.2019.105280 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000899.pica (DE-627)ELV04914698X (ELSEVIER)S0024-4937(19)30440-2 DE-627 ger DE-627 rakwb eng 530 VZ 58.19 bkl 33.09 bkl 52.78 bkl Alessio, Kiara L. verfasserin aut Thermal modelling of very long-lived (>140 Myr) high thermal gradient metamorphism as a result of radiogenic heating in the Reynolds Range, central Australia 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The Reynolds Range in the Paleo-Mesoproterozoic Aileron Province of central Australia exposes a differentially exhumed metamorphic rock system varying from greenschist-to granulite-facies. Calculated P–T pseudosections indicate that peak metamorphic conditions in greenschist-facies areas reached temperatures of ∼480 °C and pressures of 3.2–5 kbar. Peak conditions at amphibolite-facies are constrained to 500–620 °C and 1.3–3.8 kbar. P–T modelling of two petrologically different granulite-facies samples indicate that peak conditions in the exhumed granulite-facies rocks reached 780–920 °C and 3.5–5.4 kbar, corresponding to high apparent thermal gradients of 152–218 °C/kbar. In the amphibolite-facies rocks, in situ LA–ICP–MS U–Pb monazite geochronology records ages that range between 1680 and 1550 Ma. In contrast, in the granulite-facies rocks, monazite records ages of ca. 1560 Ma. The terrane contains significantly elevated rates of crustal heat production compared to global norms, and when incorporated into lithospheric thermal models with reasonable boundary conditions and average thermal properties, can plausibly account for the long-lasting metamorphic conditions. The thermal modelling shows that the long lasting (>100 Myr) record of monazite U–Pb ages, supported by previous studies, reflects a continuous duration of elevated crustal temperatures, an interpretation consistent with texturally simple mineral assemblages that lack any evidence for polymetamorphism. In high-crustal heat production terranes, high thermal gradients and high temperatures will persist until exhumation removes the upper crust. This physical reality provides a basis for the existence of arbitrarily long-lived metamorphic systems, even under high thermal gradients that are generally considered to be thermally anomalous. However, such thermal anomalism is not remarkable, as there is abundant evidence for elevated rates of crustal heat production in the Reynolds Range and worldwide. In terranes where accessory minerals record large continuous ranges of age, robust volumetric measurements of crustal heat production rates are a necessary step in evaluating the potential thermal significance of such geochronological records. Failure to document rates of crustal heat generation invalidates many interpretations for drivers of metamorphism. The Reynolds Range in the Paleo-Mesoproterozoic Aileron Province of central Australia exposes a differentially exhumed metamorphic rock system varying from greenschist-to granulite-facies. Calculated P–T pseudosections indicate that peak metamorphic conditions in greenschist-facies areas reached temperatures of ∼480 °C and pressures of 3.2–5 kbar. Peak conditions at amphibolite-facies are constrained to 500–620 °C and 1.3–3.8 kbar. P–T modelling of two petrologically different granulite-facies samples indicate that peak conditions in the exhumed granulite-facies rocks reached 780–920 °C and 3.5–5.4 kbar, corresponding to high apparent thermal gradients of 152–218 °C/kbar. In the amphibolite-facies rocks, in situ LA–ICP–MS U–Pb monazite geochronology records ages that range between 1680 and 1550 Ma. In contrast, in the granulite-facies rocks, monazite records ages of ca. 1560 Ma. The terrane contains significantly elevated rates of crustal heat production compared to global norms, and when incorporated into lithospheric thermal models with reasonable boundary conditions and average thermal properties, can plausibly account for the long-lasting metamorphic conditions. The thermal modelling shows that the long lasting (>100 Myr) record of monazite U–Pb ages, supported by previous studies, reflects a continuous duration of elevated crustal temperatures, an interpretation consistent with texturally simple mineral assemblages that lack any evidence for polymetamorphism. In high-crustal heat production terranes, high thermal gradients and high temperatures will persist until exhumation removes the upper crust. This physical reality provides a basis for the existence of arbitrarily long-lived metamorphic systems, even under high thermal gradients that are generally considered to be thermally anomalous. However, such thermal anomalism is not remarkable, as there is abundant evidence for elevated rates of crustal heat production in the Reynolds Range and worldwide. In terranes where accessory minerals record large continuous ranges of age, robust volumetric measurements of crustal heat production rates are a necessary step in evaluating the potential thermal significance of such geochronological records. Failure to document rates of crustal heat generation invalidates many interpretations for drivers of metamorphism. Geochronology Elsevier Heat production Elsevier Phase equilibria modelling Elsevier Metamorphic Elsevier Thermal modelling Elsevier Hand, Martin oth Hasterok, Derrick oth Morrissey, Laura J. oth Kelsey, David E. oth Raimondo, Tom 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.2019.105280 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.2019.105280 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000899.pica (DE-627)ELV04914698X (ELSEVIER)S0024-4937(19)30440-2 DE-627 ger DE-627 rakwb eng 530 VZ 58.19 bkl 33.09 bkl 52.78 bkl Alessio, Kiara L. verfasserin aut Thermal modelling of very long-lived (>140 Myr) high thermal gradient metamorphism as a result of radiogenic heating in the Reynolds Range, central Australia 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The Reynolds Range in the Paleo-Mesoproterozoic Aileron Province of central Australia exposes a differentially exhumed metamorphic rock system varying from greenschist-to granulite-facies. Calculated P–T pseudosections indicate that peak metamorphic conditions in greenschist-facies areas reached temperatures of ∼480 °C and pressures of 3.2–5 kbar. Peak conditions at amphibolite-facies are constrained to 500–620 °C and 1.3–3.8 kbar. P–T modelling of two petrologically different granulite-facies samples indicate that peak conditions in the exhumed granulite-facies rocks reached 780–920 °C and 3.5–5.4 kbar, corresponding to high apparent thermal gradients of 152–218 °C/kbar. In the amphibolite-facies rocks, in situ LA–ICP–MS U–Pb monazite geochronology records ages that range between 1680 and 1550 Ma. In contrast, in the granulite-facies rocks, monazite records ages of ca. 1560 Ma. The terrane contains significantly elevated rates of crustal heat production compared to global norms, and when incorporated into lithospheric thermal models with reasonable boundary conditions and average thermal properties, can plausibly account for the long-lasting metamorphic conditions. The thermal modelling shows that the long lasting (>100 Myr) record of monazite U–Pb ages, supported by previous studies, reflects a continuous duration of elevated crustal temperatures, an interpretation consistent with texturally simple mineral assemblages that lack any evidence for polymetamorphism. In high-crustal heat production terranes, high thermal gradients and high temperatures will persist until exhumation removes the upper crust. This physical reality provides a basis for the existence of arbitrarily long-lived metamorphic systems, even under high thermal gradients that are generally considered to be thermally anomalous. However, such thermal anomalism is not remarkable, as there is abundant evidence for elevated rates of crustal heat production in the Reynolds Range and worldwide. In terranes where accessory minerals record large continuous ranges of age, robust volumetric measurements of crustal heat production rates are a necessary step in evaluating the potential thermal significance of such geochronological records. Failure to document rates of crustal heat generation invalidates many interpretations for drivers of metamorphism. The Reynolds Range in the Paleo-Mesoproterozoic Aileron Province of central Australia exposes a differentially exhumed metamorphic rock system varying from greenschist-to granulite-facies. Calculated P–T pseudosections indicate that peak metamorphic conditions in greenschist-facies areas reached temperatures of ∼480 °C and pressures of 3.2–5 kbar. Peak conditions at amphibolite-facies are constrained to 500–620 °C and 1.3–3.8 kbar. P–T modelling of two petrologically different granulite-facies samples indicate that peak conditions in the exhumed granulite-facies rocks reached 780–920 °C and 3.5–5.4 kbar, corresponding to high apparent thermal gradients of 152–218 °C/kbar. In the amphibolite-facies rocks, in situ LA–ICP–MS U–Pb monazite geochronology records ages that range between 1680 and 1550 Ma. In contrast, in the granulite-facies rocks, monazite records ages of ca. 1560 Ma. The terrane contains significantly elevated rates of crustal heat production compared to global norms, and when incorporated into lithospheric thermal models with reasonable boundary conditions and average thermal properties, can plausibly account for the long-lasting metamorphic conditions. The thermal modelling shows that the long lasting (>100 Myr) record of monazite U–Pb ages, supported by previous studies, reflects a continuous duration of elevated crustal temperatures, an interpretation consistent with texturally simple mineral assemblages that lack any evidence for polymetamorphism. In high-crustal heat production terranes, high thermal gradients and high temperatures will persist until exhumation removes the upper crust. This physical reality provides a basis for the existence of arbitrarily long-lived metamorphic systems, even under high thermal gradients that are generally considered to be thermally anomalous. However, such thermal anomalism is not remarkable, as there is abundant evidence for elevated rates of crustal heat production in the Reynolds Range and worldwide. In terranes where accessory minerals record large continuous ranges of age, robust volumetric measurements of crustal heat production rates are a necessary step in evaluating the potential thermal significance of such geochronological records. Failure to document rates of crustal heat generation invalidates many interpretations for drivers of metamorphism. Geochronology Elsevier Heat production Elsevier Phase equilibria modelling Elsevier Metamorphic Elsevier Thermal modelling Elsevier Hand, Martin oth Hasterok, Derrick oth Morrissey, Laura J. oth Kelsey, David E. oth Raimondo, Tom 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.2019.105280 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.2019.105280 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000899.pica (DE-627)ELV04914698X (ELSEVIER)S0024-4937(19)30440-2 DE-627 ger DE-627 rakwb eng 530 VZ 58.19 bkl 33.09 bkl 52.78 bkl Alessio, Kiara L. verfasserin aut Thermal modelling of very long-lived (>140 Myr) high thermal gradient metamorphism as a result of radiogenic heating in the Reynolds Range, central Australia 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The Reynolds Range in the Paleo-Mesoproterozoic Aileron Province of central Australia exposes a differentially exhumed metamorphic rock system varying from greenschist-to granulite-facies. Calculated P–T pseudosections indicate that peak metamorphic conditions in greenschist-facies areas reached temperatures of ∼480 °C and pressures of 3.2–5 kbar. Peak conditions at amphibolite-facies are constrained to 500–620 °C and 1.3–3.8 kbar. P–T modelling of two petrologically different granulite-facies samples indicate that peak conditions in the exhumed granulite-facies rocks reached 780–920 °C and 3.5–5.4 kbar, corresponding to high apparent thermal gradients of 152–218 °C/kbar. In the amphibolite-facies rocks, in situ LA–ICP–MS U–Pb monazite geochronology records ages that range between 1680 and 1550 Ma. In contrast, in the granulite-facies rocks, monazite records ages of ca. 1560 Ma. The terrane contains significantly elevated rates of crustal heat production compared to global norms, and when incorporated into lithospheric thermal models with reasonable boundary conditions and average thermal properties, can plausibly account for the long-lasting metamorphic conditions. The thermal modelling shows that the long lasting (>100 Myr) record of monazite U–Pb ages, supported by previous studies, reflects a continuous duration of elevated crustal temperatures, an interpretation consistent with texturally simple mineral assemblages that lack any evidence for polymetamorphism. In high-crustal heat production terranes, high thermal gradients and high temperatures will persist until exhumation removes the upper crust. This physical reality provides a basis for the existence of arbitrarily long-lived metamorphic systems, even under high thermal gradients that are generally considered to be thermally anomalous. However, such thermal anomalism is not remarkable, as there is abundant evidence for elevated rates of crustal heat production in the Reynolds Range and worldwide. In terranes where accessory minerals record large continuous ranges of age, robust volumetric measurements of crustal heat production rates are a necessary step in evaluating the potential thermal significance of such geochronological records. Failure to document rates of crustal heat generation invalidates many interpretations for drivers of metamorphism. The Reynolds Range in the Paleo-Mesoproterozoic Aileron Province of central Australia exposes a differentially exhumed metamorphic rock system varying from greenschist-to granulite-facies. Calculated P–T pseudosections indicate that peak metamorphic conditions in greenschist-facies areas reached temperatures of ∼480 °C and pressures of 3.2–5 kbar. Peak conditions at amphibolite-facies are constrained to 500–620 °C and 1.3–3.8 kbar. P–T modelling of two petrologically different granulite-facies samples indicate that peak conditions in the exhumed granulite-facies rocks reached 780–920 °C and 3.5–5.4 kbar, corresponding to high apparent thermal gradients of 152–218 °C/kbar. In the amphibolite-facies rocks, in situ LA–ICP–MS U–Pb monazite geochronology records ages that range between 1680 and 1550 Ma. In contrast, in the granulite-facies rocks, monazite records ages of ca. 1560 Ma. The terrane contains significantly elevated rates of crustal heat production compared to global norms, and when incorporated into lithospheric thermal models with reasonable boundary conditions and average thermal properties, can plausibly account for the long-lasting metamorphic conditions. The thermal modelling shows that the long lasting (>100 Myr) record of monazite U–Pb ages, supported by previous studies, reflects a continuous duration of elevated crustal temperatures, an interpretation consistent with texturally simple mineral assemblages that lack any evidence for polymetamorphism. In high-crustal heat production terranes, high thermal gradients and high temperatures will persist until exhumation removes the upper crust. This physical reality provides a basis for the existence of arbitrarily long-lived metamorphic systems, even under high thermal gradients that are generally considered to be thermally anomalous. However, such thermal anomalism is not remarkable, as there is abundant evidence for elevated rates of crustal heat production in the Reynolds Range and worldwide. In terranes where accessory minerals record large continuous ranges of age, robust volumetric measurements of crustal heat production rates are a necessary step in evaluating the potential thermal significance of such geochronological records. Failure to document rates of crustal heat generation invalidates many interpretations for drivers of metamorphism. Geochronology Elsevier Heat production Elsevier Phase equilibria modelling Elsevier Metamorphic Elsevier Thermal modelling Elsevier Hand, Martin oth Hasterok, Derrick oth Morrissey, Laura J. oth Kelsey, David E. oth Raimondo, Tom 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.2019.105280 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.2019.105280 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000899.pica (DE-627)ELV04914698X (ELSEVIER)S0024-4937(19)30440-2 DE-627 ger DE-627 rakwb eng 530 VZ 58.19 bkl 33.09 bkl 52.78 bkl Alessio, Kiara L. verfasserin aut Thermal modelling of very long-lived (>140 Myr) high thermal gradient metamorphism as a result of radiogenic heating in the Reynolds Range, central Australia 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The Reynolds Range in the Paleo-Mesoproterozoic Aileron Province of central Australia exposes a differentially exhumed metamorphic rock system varying from greenschist-to granulite-facies. Calculated P–T pseudosections indicate that peak metamorphic conditions in greenschist-facies areas reached temperatures of ∼480 °C and pressures of 3.2–5 kbar. Peak conditions at amphibolite-facies are constrained to 500–620 °C and 1.3–3.8 kbar. P–T modelling of two petrologically different granulite-facies samples indicate that peak conditions in the exhumed granulite-facies rocks reached 780–920 °C and 3.5–5.4 kbar, corresponding to high apparent thermal gradients of 152–218 °C/kbar. In the amphibolite-facies rocks, in situ LA–ICP–MS U–Pb monazite geochronology records ages that range between 1680 and 1550 Ma. In contrast, in the granulite-facies rocks, monazite records ages of ca. 1560 Ma. The terrane contains significantly elevated rates of crustal heat production compared to global norms, and when incorporated into lithospheric thermal models with reasonable boundary conditions and average thermal properties, can plausibly account for the long-lasting metamorphic conditions. The thermal modelling shows that the long lasting (>100 Myr) record of monazite U–Pb ages, supported by previous studies, reflects a continuous duration of elevated crustal temperatures, an interpretation consistent with texturally simple mineral assemblages that lack any evidence for polymetamorphism. In high-crustal heat production terranes, high thermal gradients and high temperatures will persist until exhumation removes the upper crust. This physical reality provides a basis for the existence of arbitrarily long-lived metamorphic systems, even under high thermal gradients that are generally considered to be thermally anomalous. However, such thermal anomalism is not remarkable, as there is abundant evidence for elevated rates of crustal heat production in the Reynolds Range and worldwide. In terranes where accessory minerals record large continuous ranges of age, robust volumetric measurements of crustal heat production rates are a necessary step in evaluating the potential thermal significance of such geochronological records. Failure to document rates of crustal heat generation invalidates many interpretations for drivers of metamorphism. The Reynolds Range in the Paleo-Mesoproterozoic Aileron Province of central Australia exposes a differentially exhumed metamorphic rock system varying from greenschist-to granulite-facies. Calculated P–T pseudosections indicate that peak metamorphic conditions in greenschist-facies areas reached temperatures of ∼480 °C and pressures of 3.2–5 kbar. Peak conditions at amphibolite-facies are constrained to 500–620 °C and 1.3–3.8 kbar. P–T modelling of two petrologically different granulite-facies samples indicate that peak conditions in the exhumed granulite-facies rocks reached 780–920 °C and 3.5–5.4 kbar, corresponding to high apparent thermal gradients of 152–218 °C/kbar. In the amphibolite-facies rocks, in situ LA–ICP–MS U–Pb monazite geochronology records ages that range between 1680 and 1550 Ma. In contrast, in the granulite-facies rocks, monazite records ages of ca. 1560 Ma. The terrane contains significantly elevated rates of crustal heat production compared to global norms, and when incorporated into lithospheric thermal models with reasonable boundary conditions and average thermal properties, can plausibly account for the long-lasting metamorphic conditions. The thermal modelling shows that the long lasting (>100 Myr) record of monazite U–Pb ages, supported by previous studies, reflects a continuous duration of elevated crustal temperatures, an interpretation consistent with texturally simple mineral assemblages that lack any evidence for polymetamorphism. In high-crustal heat production terranes, high thermal gradients and high temperatures will persist until exhumation removes the upper crust. This physical reality provides a basis for the existence of arbitrarily long-lived metamorphic systems, even under high thermal gradients that are generally considered to be thermally anomalous. However, such thermal anomalism is not remarkable, as there is abundant evidence for elevated rates of crustal heat production in the Reynolds Range and worldwide. In terranes where accessory minerals record large continuous ranges of age, robust volumetric measurements of crustal heat production rates are a necessary step in evaluating the potential thermal significance of such geochronological records. Failure to document rates of crustal heat generation invalidates many interpretations for drivers of metamorphism. Geochronology Elsevier Heat production Elsevier Phase equilibria modelling Elsevier Metamorphic Elsevier Thermal modelling Elsevier Hand, Martin oth Hasterok, Derrick oth Morrissey, Laura J. oth Kelsey, David E. oth Raimondo, Tom 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.2019.105280 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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10.1016/j.lithos.2019.105280 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000899.pica (DE-627)ELV04914698X (ELSEVIER)S0024-4937(19)30440-2 DE-627 ger DE-627 rakwb eng 530 VZ 58.19 bkl 33.09 bkl 52.78 bkl Alessio, Kiara L. verfasserin aut Thermal modelling of very long-lived (>140 Myr) high thermal gradient metamorphism as a result of radiogenic heating in the Reynolds Range, central Australia 2020transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The Reynolds Range in the Paleo-Mesoproterozoic Aileron Province of central Australia exposes a differentially exhumed metamorphic rock system varying from greenschist-to granulite-facies. Calculated P–T pseudosections indicate that peak metamorphic conditions in greenschist-facies areas reached temperatures of ∼480 °C and pressures of 3.2–5 kbar. Peak conditions at amphibolite-facies are constrained to 500–620 °C and 1.3–3.8 kbar. P–T modelling of two petrologically different granulite-facies samples indicate that peak conditions in the exhumed granulite-facies rocks reached 780–920 °C and 3.5–5.4 kbar, corresponding to high apparent thermal gradients of 152–218 °C/kbar. In the amphibolite-facies rocks, in situ LA–ICP–MS U–Pb monazite geochronology records ages that range between 1680 and 1550 Ma. In contrast, in the granulite-facies rocks, monazite records ages of ca. 1560 Ma. The terrane contains significantly elevated rates of crustal heat production compared to global norms, and when incorporated into lithospheric thermal models with reasonable boundary conditions and average thermal properties, can plausibly account for the long-lasting metamorphic conditions. The thermal modelling shows that the long lasting (>100 Myr) record of monazite U–Pb ages, supported by previous studies, reflects a continuous duration of elevated crustal temperatures, an interpretation consistent with texturally simple mineral assemblages that lack any evidence for polymetamorphism. In high-crustal heat production terranes, high thermal gradients and high temperatures will persist until exhumation removes the upper crust. This physical reality provides a basis for the existence of arbitrarily long-lived metamorphic systems, even under high thermal gradients that are generally considered to be thermally anomalous. However, such thermal anomalism is not remarkable, as there is abundant evidence for elevated rates of crustal heat production in the Reynolds Range and worldwide. In terranes where accessory minerals record large continuous ranges of age, robust volumetric measurements of crustal heat production rates are a necessary step in evaluating the potential thermal significance of such geochronological records. Failure to document rates of crustal heat generation invalidates many interpretations for drivers of metamorphism. The Reynolds Range in the Paleo-Mesoproterozoic Aileron Province of central Australia exposes a differentially exhumed metamorphic rock system varying from greenschist-to granulite-facies. Calculated P–T pseudosections indicate that peak metamorphic conditions in greenschist-facies areas reached temperatures of ∼480 °C and pressures of 3.2–5 kbar. Peak conditions at amphibolite-facies are constrained to 500–620 °C and 1.3–3.8 kbar. P–T modelling of two petrologically different granulite-facies samples indicate that peak conditions in the exhumed granulite-facies rocks reached 780–920 °C and 3.5–5.4 kbar, corresponding to high apparent thermal gradients of 152–218 °C/kbar. In the amphibolite-facies rocks, in situ LA–ICP–MS U–Pb monazite geochronology records ages that range between 1680 and 1550 Ma. In contrast, in the granulite-facies rocks, monazite records ages of ca. 1560 Ma. The terrane contains significantly elevated rates of crustal heat production compared to global norms, and when incorporated into lithospheric thermal models with reasonable boundary conditions and average thermal properties, can plausibly account for the long-lasting metamorphic conditions. The thermal modelling shows that the long lasting (>100 Myr) record of monazite U–Pb ages, supported by previous studies, reflects a continuous duration of elevated crustal temperatures, an interpretation consistent with texturally simple mineral assemblages that lack any evidence for polymetamorphism. In high-crustal heat production terranes, high thermal gradients and high temperatures will persist until exhumation removes the upper crust. This physical reality provides a basis for the existence of arbitrarily long-lived metamorphic systems, even under high thermal gradients that are generally considered to be thermally anomalous. However, such thermal anomalism is not remarkable, as there is abundant evidence for elevated rates of crustal heat production in the Reynolds Range and worldwide. In terranes where accessory minerals record large continuous ranges of age, robust volumetric measurements of crustal heat production rates are a necessary step in evaluating the potential thermal significance of such geochronological records. Failure to document rates of crustal heat generation invalidates many interpretations for drivers of metamorphism. Geochronology Elsevier Heat production Elsevier Phase equilibria modelling Elsevier Metamorphic Elsevier Thermal modelling Elsevier Hand, Martin oth Hasterok, Derrick oth Morrissey, Laura J. oth Kelsey, David E. oth Raimondo, Tom 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.2019.105280 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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Thermal modelling of very long-lived (>140 Myr) high thermal gradient metamorphism as a result of radiogenic heating in the Reynolds Range, central Australia |
| abstract |
The Reynolds Range in the Paleo-Mesoproterozoic Aileron Province of central Australia exposes a differentially exhumed metamorphic rock system varying from greenschist-to granulite-facies. Calculated P–T pseudosections indicate that peak metamorphic conditions in greenschist-facies areas reached temperatures of ∼480 °C and pressures of 3.2–5 kbar. Peak conditions at amphibolite-facies are constrained to 500–620 °C and 1.3–3.8 kbar. P–T modelling of two petrologically different granulite-facies samples indicate that peak conditions in the exhumed granulite-facies rocks reached 780–920 °C and 3.5–5.4 kbar, corresponding to high apparent thermal gradients of 152–218 °C/kbar. In the amphibolite-facies rocks, in situ LA–ICP–MS U–Pb monazite geochronology records ages that range between 1680 and 1550 Ma. In contrast, in the granulite-facies rocks, monazite records ages of ca. 1560 Ma. The terrane contains significantly elevated rates of crustal heat production compared to global norms, and when incorporated into lithospheric thermal models with reasonable boundary conditions and average thermal properties, can plausibly account for the long-lasting metamorphic conditions. The thermal modelling shows that the long lasting (>100 Myr) record of monazite U–Pb ages, supported by previous studies, reflects a continuous duration of elevated crustal temperatures, an interpretation consistent with texturally simple mineral assemblages that lack any evidence for polymetamorphism. In high-crustal heat production terranes, high thermal gradients and high temperatures will persist until exhumation removes the upper crust. This physical reality provides a basis for the existence of arbitrarily long-lived metamorphic systems, even under high thermal gradients that are generally considered to be thermally anomalous. However, such thermal anomalism is not remarkable, as there is abundant evidence for elevated rates of crustal heat production in the Reynolds Range and worldwide. In terranes where accessory minerals record large continuous ranges of age, robust volumetric measurements of crustal heat production rates are a necessary step in evaluating the potential thermal significance of such geochronological records. Failure to document rates of crustal heat generation invalidates many interpretations for drivers of metamorphism. |
| abstractGer |
The Reynolds Range in the Paleo-Mesoproterozoic Aileron Province of central Australia exposes a differentially exhumed metamorphic rock system varying from greenschist-to granulite-facies. Calculated P–T pseudosections indicate that peak metamorphic conditions in greenschist-facies areas reached temperatures of ∼480 °C and pressures of 3.2–5 kbar. Peak conditions at amphibolite-facies are constrained to 500–620 °C and 1.3–3.8 kbar. P–T modelling of two petrologically different granulite-facies samples indicate that peak conditions in the exhumed granulite-facies rocks reached 780–920 °C and 3.5–5.4 kbar, corresponding to high apparent thermal gradients of 152–218 °C/kbar. In the amphibolite-facies rocks, in situ LA–ICP–MS U–Pb monazite geochronology records ages that range between 1680 and 1550 Ma. In contrast, in the granulite-facies rocks, monazite records ages of ca. 1560 Ma. The terrane contains significantly elevated rates of crustal heat production compared to global norms, and when incorporated into lithospheric thermal models with reasonable boundary conditions and average thermal properties, can plausibly account for the long-lasting metamorphic conditions. The thermal modelling shows that the long lasting (>100 Myr) record of monazite U–Pb ages, supported by previous studies, reflects a continuous duration of elevated crustal temperatures, an interpretation consistent with texturally simple mineral assemblages that lack any evidence for polymetamorphism. In high-crustal heat production terranes, high thermal gradients and high temperatures will persist until exhumation removes the upper crust. This physical reality provides a basis for the existence of arbitrarily long-lived metamorphic systems, even under high thermal gradients that are generally considered to be thermally anomalous. However, such thermal anomalism is not remarkable, as there is abundant evidence for elevated rates of crustal heat production in the Reynolds Range and worldwide. In terranes where accessory minerals record large continuous ranges of age, robust volumetric measurements of crustal heat production rates are a necessary step in evaluating the potential thermal significance of such geochronological records. Failure to document rates of crustal heat generation invalidates many interpretations for drivers of metamorphism. |
| abstract_unstemmed |
The Reynolds Range in the Paleo-Mesoproterozoic Aileron Province of central Australia exposes a differentially exhumed metamorphic rock system varying from greenschist-to granulite-facies. Calculated P–T pseudosections indicate that peak metamorphic conditions in greenschist-facies areas reached temperatures of ∼480 °C and pressures of 3.2–5 kbar. Peak conditions at amphibolite-facies are constrained to 500–620 °C and 1.3–3.8 kbar. P–T modelling of two petrologically different granulite-facies samples indicate that peak conditions in the exhumed granulite-facies rocks reached 780–920 °C and 3.5–5.4 kbar, corresponding to high apparent thermal gradients of 152–218 °C/kbar. In the amphibolite-facies rocks, in situ LA–ICP–MS U–Pb monazite geochronology records ages that range between 1680 and 1550 Ma. In contrast, in the granulite-facies rocks, monazite records ages of ca. 1560 Ma. The terrane contains significantly elevated rates of crustal heat production compared to global norms, and when incorporated into lithospheric thermal models with reasonable boundary conditions and average thermal properties, can plausibly account for the long-lasting metamorphic conditions. The thermal modelling shows that the long lasting (>100 Myr) record of monazite U–Pb ages, supported by previous studies, reflects a continuous duration of elevated crustal temperatures, an interpretation consistent with texturally simple mineral assemblages that lack any evidence for polymetamorphism. In high-crustal heat production terranes, high thermal gradients and high temperatures will persist until exhumation removes the upper crust. This physical reality provides a basis for the existence of arbitrarily long-lived metamorphic systems, even under high thermal gradients that are generally considered to be thermally anomalous. However, such thermal anomalism is not remarkable, as there is abundant evidence for elevated rates of crustal heat production in the Reynolds Range and worldwide. In terranes where accessory minerals record large continuous ranges of age, robust volumetric measurements of crustal heat production rates are a necessary step in evaluating the potential thermal significance of such geochronological records. Failure to document rates of crustal heat generation invalidates many interpretations for drivers of metamorphism. |
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Thermal modelling of very long-lived (>140 Myr) high thermal gradient metamorphism as a result of radiogenic heating in the Reynolds Range, central Australia |
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https://doi.org/10.1016/j.lithos.2019.105280 |
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Hand, Martin Hasterok, Derrick Morrissey, Laura J. Kelsey, David E. Raimondo, Tom |
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10.1016/j.lithos.2019.105280 |
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