Tafassasset: Evidence of early incipient differentiation on a metal-rich chondritic parent body
Tafassasset is a primitive meteorite, the origin of which is still debated. Its possible relationship to either the CR chondrites – considered among the most primitive meteorites – or the brachinites – complex primitive achondrites – makes it an interesting sample for studying the initial stages of...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Breton, Thomas [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2015transfer abstract |
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| Schlagwörter: |
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| Umfang: |
11 |
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| Übergeordnetes Werk: |
Enthalten in: Energy consumption and environmental degradation nexus: A systematic review and meta-analysis of fossil fuel and renewable energy consumption - Kılıç Depren, Serpil ELSEVIER, 2022, Amsterdam [u.a.] |
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| Übergeordnetes Werk: |
volume:425 ; year:2015 ; day:1 ; month:09 ; pages:193-203 ; extent:11 |
| Links: |
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| DOI / URN: |
10.1016/j.epsl.2015.06.002 |
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ELV023947926 |
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| 520 | |a Tafassasset is a primitive meteorite, the origin of which is still debated. Its possible relationship to either the CR chondrites – considered among the most primitive meteorites – or the brachinites – complex primitive achondrites – makes it an interesting sample for studying the initial stages of planetary accretion and differentiation in the early solar system. Here, we report tungsten (W) isotope data for bulk rock samples as well as for mineral fractions from Tafassasset, along with micro-computed tomography of a piece of the meteorite. Silicates show mass-independent W isotope anomalies, while the metal phase does not. These nucleosynthetic anomalies are interpreted as reflecting the presence of SiC presolar grains in the matrix of the meteorite, carrying s-process 184W. After correction of the nucleosynthetic anomalies, a correlation is observed between the 182W/184W isotope compositions and the Hf/W ratios of the different fractions. A 182Hf–182W age of ca. 2.9 Ma after CAIs is inferred from the 182Hf–182W chronometer, slightly older than other estimates based on the 53Mn–53Cr, 26Al–26Mg, and Pb/Pb chronometers, but consistent with the difference in closure temperatures of the different isotopic systems. Numerical modeling of the thermal evolution of Tafassasset indicates accretion of a parent-body less than ∼50 km in diameter, ≤1 Ma after the formation of CAIs, at a time when short-lived radio-nuclides induced metal–silicate separation and partial melting of the silicates with extraction of a basaltic component. According to our new data, Tafassasset may represent an inner part of a CR-like parent body, with a differentiation history similar to, but less severe than, that of brachinites. | ||
| 520 | |a Tafassasset is a primitive meteorite, the origin of which is still debated. Its possible relationship to either the CR chondrites – considered among the most primitive meteorites – or the brachinites – complex primitive achondrites – makes it an interesting sample for studying the initial stages of planetary accretion and differentiation in the early solar system. Here, we report tungsten (W) isotope data for bulk rock samples as well as for mineral fractions from Tafassasset, along with micro-computed tomography of a piece of the meteorite. Silicates show mass-independent W isotope anomalies, while the metal phase does not. These nucleosynthetic anomalies are interpreted as reflecting the presence of SiC presolar grains in the matrix of the meteorite, carrying s-process 184W. After correction of the nucleosynthetic anomalies, a correlation is observed between the 182W/184W isotope compositions and the Hf/W ratios of the different fractions. A 182Hf–182W age of ca. 2.9 Ma after CAIs is inferred from the 182Hf–182W chronometer, slightly older than other estimates based on the 53Mn–53Cr, 26Al–26Mg, and Pb/Pb chronometers, but consistent with the difference in closure temperatures of the different isotopic systems. Numerical modeling of the thermal evolution of Tafassasset indicates accretion of a parent-body less than ∼50 km in diameter, ≤1 Ma after the formation of CAIs, at a time when short-lived radio-nuclides induced metal–silicate separation and partial melting of the silicates with extraction of a basaltic component. According to our new data, Tafassasset may represent an inner part of a CR-like parent body, with a differentiation history similar to, but less severe than, that of brachinites. | ||
| 650 | 7 | |a micro-computed tomography |2 Elsevier | |
| 650 | 7 | |a metal–silicate differentiation |2 Elsevier | |
| 650 | 7 | |a metal-rich chondrite |2 Elsevier | |
| 650 | 7 | |a nucleosynthetic anomalies |2 Elsevier | |
| 650 | 7 | |a early solar system |2 Elsevier | |
| 650 | 7 | |a 182Hf–182W systematics |2 Elsevier | |
| 700 | 1 | |a Quitté, Ghylaine |4 oth | |
| 700 | 1 | |a Toplis, Michael J. |4 oth | |
| 700 | 1 | |a Monnereau, Marc |4 oth | |
| 700 | 1 | |a Birck, Jean-Louis |4 oth | |
| 700 | 1 | |a Göpel, Christa |4 oth | |
| 700 | 1 | |a Charles, Cyril |4 oth | |
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10.1016/j.epsl.2015.06.002 doi GBVA2015021000002.pica (DE-627)ELV023947926 (ELSEVIER)S0012-821X(15)00352-0 DE-627 ger DE-627 rakwb eng 550 550 DE-600 610 333.7 VZ BIODIV DE-30 fid 42.90 bkl 42.11 bkl Breton, Thomas verfasserin aut Tafassasset: Evidence of early incipient differentiation on a metal-rich chondritic parent body 2015transfer abstract 11 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Tafassasset is a primitive meteorite, the origin of which is still debated. Its possible relationship to either the CR chondrites – considered among the most primitive meteorites – or the brachinites – complex primitive achondrites – makes it an interesting sample for studying the initial stages of planetary accretion and differentiation in the early solar system. Here, we report tungsten (W) isotope data for bulk rock samples as well as for mineral fractions from Tafassasset, along with micro-computed tomography of a piece of the meteorite. Silicates show mass-independent W isotope anomalies, while the metal phase does not. These nucleosynthetic anomalies are interpreted as reflecting the presence of SiC presolar grains in the matrix of the meteorite, carrying s-process 184W. After correction of the nucleosynthetic anomalies, a correlation is observed between the 182W/184W isotope compositions and the Hf/W ratios of the different fractions. A 182Hf–182W age of ca. 2.9 Ma after CAIs is inferred from the 182Hf–182W chronometer, slightly older than other estimates based on the 53Mn–53Cr, 26Al–26Mg, and Pb/Pb chronometers, but consistent with the difference in closure temperatures of the different isotopic systems. Numerical modeling of the thermal evolution of Tafassasset indicates accretion of a parent-body less than ∼50 km in diameter, ≤1 Ma after the formation of CAIs, at a time when short-lived radio-nuclides induced metal–silicate separation and partial melting of the silicates with extraction of a basaltic component. According to our new data, Tafassasset may represent an inner part of a CR-like parent body, with a differentiation history similar to, but less severe than, that of brachinites. Tafassasset is a primitive meteorite, the origin of which is still debated. Its possible relationship to either the CR chondrites – considered among the most primitive meteorites – or the brachinites – complex primitive achondrites – makes it an interesting sample for studying the initial stages of planetary accretion and differentiation in the early solar system. Here, we report tungsten (W) isotope data for bulk rock samples as well as for mineral fractions from Tafassasset, along with micro-computed tomography of a piece of the meteorite. Silicates show mass-independent W isotope anomalies, while the metal phase does not. These nucleosynthetic anomalies are interpreted as reflecting the presence of SiC presolar grains in the matrix of the meteorite, carrying s-process 184W. After correction of the nucleosynthetic anomalies, a correlation is observed between the 182W/184W isotope compositions and the Hf/W ratios of the different fractions. A 182Hf–182W age of ca. 2.9 Ma after CAIs is inferred from the 182Hf–182W chronometer, slightly older than other estimates based on the 53Mn–53Cr, 26Al–26Mg, and Pb/Pb chronometers, but consistent with the difference in closure temperatures of the different isotopic systems. Numerical modeling of the thermal evolution of Tafassasset indicates accretion of a parent-body less than ∼50 km in diameter, ≤1 Ma after the formation of CAIs, at a time when short-lived radio-nuclides induced metal–silicate separation and partial melting of the silicates with extraction of a basaltic component. According to our new data, Tafassasset may represent an inner part of a CR-like parent body, with a differentiation history similar to, but less severe than, that of brachinites. micro-computed tomography Elsevier metal–silicate differentiation Elsevier metal-rich chondrite Elsevier nucleosynthetic anomalies Elsevier early solar system Elsevier 182Hf–182W systematics Elsevier Quitté, Ghylaine oth Toplis, Michael J. oth Monnereau, Marc oth Birck, Jean-Louis oth Göpel, Christa oth Charles, Cyril oth Enthalten in Elsevier Kılıç Depren, Serpil ELSEVIER Energy consumption and environmental degradation nexus: A systematic review and meta-analysis of fossil fuel and renewable energy consumption 2022 Amsterdam [u.a.] (DE-627)ELV008390509 volume:425 year:2015 day:1 month:09 pages:193-203 extent:11 https://doi.org/10.1016/j.epsl.2015.06.002 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-BIODIV SSG-OLC-PHA 42.90 Ökologie: Allgemeines VZ 42.11 Biomathematik Biokybernetik VZ AR 425 2015 1 0901 193-203 11 045F 550 |
| spelling |
10.1016/j.epsl.2015.06.002 doi GBVA2015021000002.pica (DE-627)ELV023947926 (ELSEVIER)S0012-821X(15)00352-0 DE-627 ger DE-627 rakwb eng 550 550 DE-600 610 333.7 VZ BIODIV DE-30 fid 42.90 bkl 42.11 bkl Breton, Thomas verfasserin aut Tafassasset: Evidence of early incipient differentiation on a metal-rich chondritic parent body 2015transfer abstract 11 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Tafassasset is a primitive meteorite, the origin of which is still debated. Its possible relationship to either the CR chondrites – considered among the most primitive meteorites – or the brachinites – complex primitive achondrites – makes it an interesting sample for studying the initial stages of planetary accretion and differentiation in the early solar system. Here, we report tungsten (W) isotope data for bulk rock samples as well as for mineral fractions from Tafassasset, along with micro-computed tomography of a piece of the meteorite. Silicates show mass-independent W isotope anomalies, while the metal phase does not. These nucleosynthetic anomalies are interpreted as reflecting the presence of SiC presolar grains in the matrix of the meteorite, carrying s-process 184W. After correction of the nucleosynthetic anomalies, a correlation is observed between the 182W/184W isotope compositions and the Hf/W ratios of the different fractions. A 182Hf–182W age of ca. 2.9 Ma after CAIs is inferred from the 182Hf–182W chronometer, slightly older than other estimates based on the 53Mn–53Cr, 26Al–26Mg, and Pb/Pb chronometers, but consistent with the difference in closure temperatures of the different isotopic systems. Numerical modeling of the thermal evolution of Tafassasset indicates accretion of a parent-body less than ∼50 km in diameter, ≤1 Ma after the formation of CAIs, at a time when short-lived radio-nuclides induced metal–silicate separation and partial melting of the silicates with extraction of a basaltic component. According to our new data, Tafassasset may represent an inner part of a CR-like parent body, with a differentiation history similar to, but less severe than, that of brachinites. Tafassasset is a primitive meteorite, the origin of which is still debated. Its possible relationship to either the CR chondrites – considered among the most primitive meteorites – or the brachinites – complex primitive achondrites – makes it an interesting sample for studying the initial stages of planetary accretion and differentiation in the early solar system. Here, we report tungsten (W) isotope data for bulk rock samples as well as for mineral fractions from Tafassasset, along with micro-computed tomography of a piece of the meteorite. Silicates show mass-independent W isotope anomalies, while the metal phase does not. These nucleosynthetic anomalies are interpreted as reflecting the presence of SiC presolar grains in the matrix of the meteorite, carrying s-process 184W. After correction of the nucleosynthetic anomalies, a correlation is observed between the 182W/184W isotope compositions and the Hf/W ratios of the different fractions. A 182Hf–182W age of ca. 2.9 Ma after CAIs is inferred from the 182Hf–182W chronometer, slightly older than other estimates based on the 53Mn–53Cr, 26Al–26Mg, and Pb/Pb chronometers, but consistent with the difference in closure temperatures of the different isotopic systems. Numerical modeling of the thermal evolution of Tafassasset indicates accretion of a parent-body less than ∼50 km in diameter, ≤1 Ma after the formation of CAIs, at a time when short-lived radio-nuclides induced metal–silicate separation and partial melting of the silicates with extraction of a basaltic component. According to our new data, Tafassasset may represent an inner part of a CR-like parent body, with a differentiation history similar to, but less severe than, that of brachinites. micro-computed tomography Elsevier metal–silicate differentiation Elsevier metal-rich chondrite Elsevier nucleosynthetic anomalies Elsevier early solar system Elsevier 182Hf–182W systematics Elsevier Quitté, Ghylaine oth Toplis, Michael J. oth Monnereau, Marc oth Birck, Jean-Louis oth Göpel, Christa oth Charles, Cyril oth Enthalten in Elsevier Kılıç Depren, Serpil ELSEVIER Energy consumption and environmental degradation nexus: A systematic review and meta-analysis of fossil fuel and renewable energy consumption 2022 Amsterdam [u.a.] (DE-627)ELV008390509 volume:425 year:2015 day:1 month:09 pages:193-203 extent:11 https://doi.org/10.1016/j.epsl.2015.06.002 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-BIODIV SSG-OLC-PHA 42.90 Ökologie: Allgemeines VZ 42.11 Biomathematik Biokybernetik VZ AR 425 2015 1 0901 193-203 11 045F 550 |
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10.1016/j.epsl.2015.06.002 doi GBVA2015021000002.pica (DE-627)ELV023947926 (ELSEVIER)S0012-821X(15)00352-0 DE-627 ger DE-627 rakwb eng 550 550 DE-600 610 333.7 VZ BIODIV DE-30 fid 42.90 bkl 42.11 bkl Breton, Thomas verfasserin aut Tafassasset: Evidence of early incipient differentiation on a metal-rich chondritic parent body 2015transfer abstract 11 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Tafassasset is a primitive meteorite, the origin of which is still debated. Its possible relationship to either the CR chondrites – considered among the most primitive meteorites – or the brachinites – complex primitive achondrites – makes it an interesting sample for studying the initial stages of planetary accretion and differentiation in the early solar system. Here, we report tungsten (W) isotope data for bulk rock samples as well as for mineral fractions from Tafassasset, along with micro-computed tomography of a piece of the meteorite. Silicates show mass-independent W isotope anomalies, while the metal phase does not. These nucleosynthetic anomalies are interpreted as reflecting the presence of SiC presolar grains in the matrix of the meteorite, carrying s-process 184W. After correction of the nucleosynthetic anomalies, a correlation is observed between the 182W/184W isotope compositions and the Hf/W ratios of the different fractions. A 182Hf–182W age of ca. 2.9 Ma after CAIs is inferred from the 182Hf–182W chronometer, slightly older than other estimates based on the 53Mn–53Cr, 26Al–26Mg, and Pb/Pb chronometers, but consistent with the difference in closure temperatures of the different isotopic systems. Numerical modeling of the thermal evolution of Tafassasset indicates accretion of a parent-body less than ∼50 km in diameter, ≤1 Ma after the formation of CAIs, at a time when short-lived radio-nuclides induced metal–silicate separation and partial melting of the silicates with extraction of a basaltic component. According to our new data, Tafassasset may represent an inner part of a CR-like parent body, with a differentiation history similar to, but less severe than, that of brachinites. Tafassasset is a primitive meteorite, the origin of which is still debated. Its possible relationship to either the CR chondrites – considered among the most primitive meteorites – or the brachinites – complex primitive achondrites – makes it an interesting sample for studying the initial stages of planetary accretion and differentiation in the early solar system. Here, we report tungsten (W) isotope data for bulk rock samples as well as for mineral fractions from Tafassasset, along with micro-computed tomography of a piece of the meteorite. Silicates show mass-independent W isotope anomalies, while the metal phase does not. These nucleosynthetic anomalies are interpreted as reflecting the presence of SiC presolar grains in the matrix of the meteorite, carrying s-process 184W. After correction of the nucleosynthetic anomalies, a correlation is observed between the 182W/184W isotope compositions and the Hf/W ratios of the different fractions. A 182Hf–182W age of ca. 2.9 Ma after CAIs is inferred from the 182Hf–182W chronometer, slightly older than other estimates based on the 53Mn–53Cr, 26Al–26Mg, and Pb/Pb chronometers, but consistent with the difference in closure temperatures of the different isotopic systems. Numerical modeling of the thermal evolution of Tafassasset indicates accretion of a parent-body less than ∼50 km in diameter, ≤1 Ma after the formation of CAIs, at a time when short-lived radio-nuclides induced metal–silicate separation and partial melting of the silicates with extraction of a basaltic component. According to our new data, Tafassasset may represent an inner part of a CR-like parent body, with a differentiation history similar to, but less severe than, that of brachinites. micro-computed tomography Elsevier metal–silicate differentiation Elsevier metal-rich chondrite Elsevier nucleosynthetic anomalies Elsevier early solar system Elsevier 182Hf–182W systematics Elsevier Quitté, Ghylaine oth Toplis, Michael J. oth Monnereau, Marc oth Birck, Jean-Louis oth Göpel, Christa oth Charles, Cyril oth Enthalten in Elsevier Kılıç Depren, Serpil ELSEVIER Energy consumption and environmental degradation nexus: A systematic review and meta-analysis of fossil fuel and renewable energy consumption 2022 Amsterdam [u.a.] (DE-627)ELV008390509 volume:425 year:2015 day:1 month:09 pages:193-203 extent:11 https://doi.org/10.1016/j.epsl.2015.06.002 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-BIODIV SSG-OLC-PHA 42.90 Ökologie: Allgemeines VZ 42.11 Biomathematik Biokybernetik VZ AR 425 2015 1 0901 193-203 11 045F 550 |
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10.1016/j.epsl.2015.06.002 doi GBVA2015021000002.pica (DE-627)ELV023947926 (ELSEVIER)S0012-821X(15)00352-0 DE-627 ger DE-627 rakwb eng 550 550 DE-600 610 333.7 VZ BIODIV DE-30 fid 42.90 bkl 42.11 bkl Breton, Thomas verfasserin aut Tafassasset: Evidence of early incipient differentiation on a metal-rich chondritic parent body 2015transfer abstract 11 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Tafassasset is a primitive meteorite, the origin of which is still debated. Its possible relationship to either the CR chondrites – considered among the most primitive meteorites – or the brachinites – complex primitive achondrites – makes it an interesting sample for studying the initial stages of planetary accretion and differentiation in the early solar system. Here, we report tungsten (W) isotope data for bulk rock samples as well as for mineral fractions from Tafassasset, along with micro-computed tomography of a piece of the meteorite. Silicates show mass-independent W isotope anomalies, while the metal phase does not. These nucleosynthetic anomalies are interpreted as reflecting the presence of SiC presolar grains in the matrix of the meteorite, carrying s-process 184W. After correction of the nucleosynthetic anomalies, a correlation is observed between the 182W/184W isotope compositions and the Hf/W ratios of the different fractions. A 182Hf–182W age of ca. 2.9 Ma after CAIs is inferred from the 182Hf–182W chronometer, slightly older than other estimates based on the 53Mn–53Cr, 26Al–26Mg, and Pb/Pb chronometers, but consistent with the difference in closure temperatures of the different isotopic systems. Numerical modeling of the thermal evolution of Tafassasset indicates accretion of a parent-body less than ∼50 km in diameter, ≤1 Ma after the formation of CAIs, at a time when short-lived radio-nuclides induced metal–silicate separation and partial melting of the silicates with extraction of a basaltic component. According to our new data, Tafassasset may represent an inner part of a CR-like parent body, with a differentiation history similar to, but less severe than, that of brachinites. Tafassasset is a primitive meteorite, the origin of which is still debated. Its possible relationship to either the CR chondrites – considered among the most primitive meteorites – or the brachinites – complex primitive achondrites – makes it an interesting sample for studying the initial stages of planetary accretion and differentiation in the early solar system. Here, we report tungsten (W) isotope data for bulk rock samples as well as for mineral fractions from Tafassasset, along with micro-computed tomography of a piece of the meteorite. Silicates show mass-independent W isotope anomalies, while the metal phase does not. These nucleosynthetic anomalies are interpreted as reflecting the presence of SiC presolar grains in the matrix of the meteorite, carrying s-process 184W. After correction of the nucleosynthetic anomalies, a correlation is observed between the 182W/184W isotope compositions and the Hf/W ratios of the different fractions. A 182Hf–182W age of ca. 2.9 Ma after CAIs is inferred from the 182Hf–182W chronometer, slightly older than other estimates based on the 53Mn–53Cr, 26Al–26Mg, and Pb/Pb chronometers, but consistent with the difference in closure temperatures of the different isotopic systems. Numerical modeling of the thermal evolution of Tafassasset indicates accretion of a parent-body less than ∼50 km in diameter, ≤1 Ma after the formation of CAIs, at a time when short-lived radio-nuclides induced metal–silicate separation and partial melting of the silicates with extraction of a basaltic component. According to our new data, Tafassasset may represent an inner part of a CR-like parent body, with a differentiation history similar to, but less severe than, that of brachinites. micro-computed tomography Elsevier metal–silicate differentiation Elsevier metal-rich chondrite Elsevier nucleosynthetic anomalies Elsevier early solar system Elsevier 182Hf–182W systematics Elsevier Quitté, Ghylaine oth Toplis, Michael J. oth Monnereau, Marc oth Birck, Jean-Louis oth Göpel, Christa oth Charles, Cyril oth Enthalten in Elsevier Kılıç Depren, Serpil ELSEVIER Energy consumption and environmental degradation nexus: A systematic review and meta-analysis of fossil fuel and renewable energy consumption 2022 Amsterdam [u.a.] (DE-627)ELV008390509 volume:425 year:2015 day:1 month:09 pages:193-203 extent:11 https://doi.org/10.1016/j.epsl.2015.06.002 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-BIODIV SSG-OLC-PHA 42.90 Ökologie: Allgemeines VZ 42.11 Biomathematik Biokybernetik VZ AR 425 2015 1 0901 193-203 11 045F 550 |
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10.1016/j.epsl.2015.06.002 doi GBVA2015021000002.pica (DE-627)ELV023947926 (ELSEVIER)S0012-821X(15)00352-0 DE-627 ger DE-627 rakwb eng 550 550 DE-600 610 333.7 VZ BIODIV DE-30 fid 42.90 bkl 42.11 bkl Breton, Thomas verfasserin aut Tafassasset: Evidence of early incipient differentiation on a metal-rich chondritic parent body 2015transfer abstract 11 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Tafassasset is a primitive meteorite, the origin of which is still debated. Its possible relationship to either the CR chondrites – considered among the most primitive meteorites – or the brachinites – complex primitive achondrites – makes it an interesting sample for studying the initial stages of planetary accretion and differentiation in the early solar system. Here, we report tungsten (W) isotope data for bulk rock samples as well as for mineral fractions from Tafassasset, along with micro-computed tomography of a piece of the meteorite. Silicates show mass-independent W isotope anomalies, while the metal phase does not. These nucleosynthetic anomalies are interpreted as reflecting the presence of SiC presolar grains in the matrix of the meteorite, carrying s-process 184W. After correction of the nucleosynthetic anomalies, a correlation is observed between the 182W/184W isotope compositions and the Hf/W ratios of the different fractions. A 182Hf–182W age of ca. 2.9 Ma after CAIs is inferred from the 182Hf–182W chronometer, slightly older than other estimates based on the 53Mn–53Cr, 26Al–26Mg, and Pb/Pb chronometers, but consistent with the difference in closure temperatures of the different isotopic systems. Numerical modeling of the thermal evolution of Tafassasset indicates accretion of a parent-body less than ∼50 km in diameter, ≤1 Ma after the formation of CAIs, at a time when short-lived radio-nuclides induced metal–silicate separation and partial melting of the silicates with extraction of a basaltic component. According to our new data, Tafassasset may represent an inner part of a CR-like parent body, with a differentiation history similar to, but less severe than, that of brachinites. Tafassasset is a primitive meteorite, the origin of which is still debated. Its possible relationship to either the CR chondrites – considered among the most primitive meteorites – or the brachinites – complex primitive achondrites – makes it an interesting sample for studying the initial stages of planetary accretion and differentiation in the early solar system. Here, we report tungsten (W) isotope data for bulk rock samples as well as for mineral fractions from Tafassasset, along with micro-computed tomography of a piece of the meteorite. Silicates show mass-independent W isotope anomalies, while the metal phase does not. These nucleosynthetic anomalies are interpreted as reflecting the presence of SiC presolar grains in the matrix of the meteorite, carrying s-process 184W. After correction of the nucleosynthetic anomalies, a correlation is observed between the 182W/184W isotope compositions and the Hf/W ratios of the different fractions. A 182Hf–182W age of ca. 2.9 Ma after CAIs is inferred from the 182Hf–182W chronometer, slightly older than other estimates based on the 53Mn–53Cr, 26Al–26Mg, and Pb/Pb chronometers, but consistent with the difference in closure temperatures of the different isotopic systems. Numerical modeling of the thermal evolution of Tafassasset indicates accretion of a parent-body less than ∼50 km in diameter, ≤1 Ma after the formation of CAIs, at a time when short-lived radio-nuclides induced metal–silicate separation and partial melting of the silicates with extraction of a basaltic component. According to our new data, Tafassasset may represent an inner part of a CR-like parent body, with a differentiation history similar to, but less severe than, that of brachinites. micro-computed tomography Elsevier metal–silicate differentiation Elsevier metal-rich chondrite Elsevier nucleosynthetic anomalies Elsevier early solar system Elsevier 182Hf–182W systematics Elsevier Quitté, Ghylaine oth Toplis, Michael J. oth Monnereau, Marc oth Birck, Jean-Louis oth Göpel, Christa oth Charles, Cyril oth Enthalten in Elsevier Kılıç Depren, Serpil ELSEVIER Energy consumption and environmental degradation nexus: A systematic review and meta-analysis of fossil fuel and renewable energy consumption 2022 Amsterdam [u.a.] (DE-627)ELV008390509 volume:425 year:2015 day:1 month:09 pages:193-203 extent:11 https://doi.org/10.1016/j.epsl.2015.06.002 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U FID-BIODIV SSG-OLC-PHA 42.90 Ökologie: Allgemeines VZ 42.11 Biomathematik Biokybernetik VZ AR 425 2015 1 0901 193-203 11 045F 550 |
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Tafassasset: Evidence of early incipient differentiation on a metal-rich chondritic parent body |
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Tafassasset is a primitive meteorite, the origin of which is still debated. Its possible relationship to either the CR chondrites – considered among the most primitive meteorites – or the brachinites – complex primitive achondrites – makes it an interesting sample for studying the initial stages of planetary accretion and differentiation in the early solar system. Here, we report tungsten (W) isotope data for bulk rock samples as well as for mineral fractions from Tafassasset, along with micro-computed tomography of a piece of the meteorite. Silicates show mass-independent W isotope anomalies, while the metal phase does not. These nucleosynthetic anomalies are interpreted as reflecting the presence of SiC presolar grains in the matrix of the meteorite, carrying s-process 184W. After correction of the nucleosynthetic anomalies, a correlation is observed between the 182W/184W isotope compositions and the Hf/W ratios of the different fractions. A 182Hf–182W age of ca. 2.9 Ma after CAIs is inferred from the 182Hf–182W chronometer, slightly older than other estimates based on the 53Mn–53Cr, 26Al–26Mg, and Pb/Pb chronometers, but consistent with the difference in closure temperatures of the different isotopic systems. Numerical modeling of the thermal evolution of Tafassasset indicates accretion of a parent-body less than ∼50 km in diameter, ≤1 Ma after the formation of CAIs, at a time when short-lived radio-nuclides induced metal–silicate separation and partial melting of the silicates with extraction of a basaltic component. According to our new data, Tafassasset may represent an inner part of a CR-like parent body, with a differentiation history similar to, but less severe than, that of brachinites. |
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Tafassasset is a primitive meteorite, the origin of which is still debated. Its possible relationship to either the CR chondrites – considered among the most primitive meteorites – or the brachinites – complex primitive achondrites – makes it an interesting sample for studying the initial stages of planetary accretion and differentiation in the early solar system. Here, we report tungsten (W) isotope data for bulk rock samples as well as for mineral fractions from Tafassasset, along with micro-computed tomography of a piece of the meteorite. Silicates show mass-independent W isotope anomalies, while the metal phase does not. These nucleosynthetic anomalies are interpreted as reflecting the presence of SiC presolar grains in the matrix of the meteorite, carrying s-process 184W. After correction of the nucleosynthetic anomalies, a correlation is observed between the 182W/184W isotope compositions and the Hf/W ratios of the different fractions. A 182Hf–182W age of ca. 2.9 Ma after CAIs is inferred from the 182Hf–182W chronometer, slightly older than other estimates based on the 53Mn–53Cr, 26Al–26Mg, and Pb/Pb chronometers, but consistent with the difference in closure temperatures of the different isotopic systems. Numerical modeling of the thermal evolution of Tafassasset indicates accretion of a parent-body less than ∼50 km in diameter, ≤1 Ma after the formation of CAIs, at a time when short-lived radio-nuclides induced metal–silicate separation and partial melting of the silicates with extraction of a basaltic component. According to our new data, Tafassasset may represent an inner part of a CR-like parent body, with a differentiation history similar to, but less severe than, that of brachinites. |
| abstract_unstemmed |
Tafassasset is a primitive meteorite, the origin of which is still debated. Its possible relationship to either the CR chondrites – considered among the most primitive meteorites – or the brachinites – complex primitive achondrites – makes it an interesting sample for studying the initial stages of planetary accretion and differentiation in the early solar system. Here, we report tungsten (W) isotope data for bulk rock samples as well as for mineral fractions from Tafassasset, along with micro-computed tomography of a piece of the meteorite. Silicates show mass-independent W isotope anomalies, while the metal phase does not. These nucleosynthetic anomalies are interpreted as reflecting the presence of SiC presolar grains in the matrix of the meteorite, carrying s-process 184W. After correction of the nucleosynthetic anomalies, a correlation is observed between the 182W/184W isotope compositions and the Hf/W ratios of the different fractions. A 182Hf–182W age of ca. 2.9 Ma after CAIs is inferred from the 182Hf–182W chronometer, slightly older than other estimates based on the 53Mn–53Cr, 26Al–26Mg, and Pb/Pb chronometers, but consistent with the difference in closure temperatures of the different isotopic systems. Numerical modeling of the thermal evolution of Tafassasset indicates accretion of a parent-body less than ∼50 km in diameter, ≤1 Ma after the formation of CAIs, at a time when short-lived radio-nuclides induced metal–silicate separation and partial melting of the silicates with extraction of a basaltic component. According to our new data, Tafassasset may represent an inner part of a CR-like parent body, with a differentiation history similar to, but less severe than, that of brachinites. |
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| title_short |
Tafassasset: Evidence of early incipient differentiation on a metal-rich chondritic parent body |
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https://doi.org/10.1016/j.epsl.2015.06.002 |
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Quitté, Ghylaine Toplis, Michael J. Monnereau, Marc Birck, Jean-Louis Göpel, Christa Charles, Cyril |
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Quitté, Ghylaine Toplis, Michael J. Monnereau, Marc Birck, Jean-Louis Göpel, Christa Charles, Cyril |
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| doi_str |
10.1016/j.epsl.2015.06.002 |
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