The formation of weathering products on the LEW 85320 ordinary chondrite: Evidence from carbon and oxygen stable isotope compositions and implications for carbonates in SNC meteorites
Abstract— Isotopic analysis of nesquehonite recovered from the surface of the LEW 85320 H5 ordinary chondrite shows that the δ 13 C and δ 18 O values of the two generations of bicarbonate (Antarctic and Texas) are different: δ 13 C = +7.9‰ and +4.2‰; δ 18 O = +17.9‰ and + 12.1‰ respectively. Carbon...
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crwiley:10.1111/j.1945-5100.1989.tb00934.x 2023-12-03T10:12:42+01:00 The formation of weathering products on the LEW 85320 ordinary chondrite: Evidence from carbon and oxygen stable isotope compositions and implications for carbonates in SNC meteorites Grady, Monica M. Gibson, E. K. Wright, I. P. Pillinger, C. T. 1989 http://dx.doi.org/10.1111/j.1945-5100.1989.tb00934.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1945-5100.1989.tb00934.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1945-5100.1989.tb00934.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Meteoritics volume 24, issue 1, page 1-7 ISSN 0026-1114 General Earth and Planetary Sciences General Environmental Science journal-article 1989 crwiley https://doi.org/10.1111/j.1945-5100.1989.tb00934.x 2023-11-09T13:39:32Z Abstract— Isotopic analysis of nesquehonite recovered from the surface of the LEW 85320 H5 ordinary chondrite shows that the δ 13 C and δ 18 O values of the two generations of bicarbonate (Antarctic and Texas) are different: δ 13 C = +7.9‰ and +4.2‰; δ 18 O = +17.9‰ and + 12.1‰ respectively. Carbon isotopic compositions are consistent with equilibrium formation from atmospheric carbon dioxide at −2 ± 4 °C (Antarctic) and +16 ± 4 °C (Texas). Oxygen isotopic data imply that the water required for nesquehonite precipitation was derived from atmospheric water vapour or glacial meltwater which had locally exchanged with silicates, either in the meteorite or in underlying bedrock. Although carbonates with similar δ 13 C values have been identified in the SNC meteorites EETA 79001 and Nakhla, petrographic and temperature constraints argue against their simply being terrestrial weathering products. Article in Journal/Newspaper Antarc* Antarctic Wiley Online Library (via Crossref) Antarctic Meteoritics 24 1 1 7 |
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Wiley Online Library (via Crossref) |
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English |
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General Earth and Planetary Sciences General Environmental Science |
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General Earth and Planetary Sciences General Environmental Science Grady, Monica M. Gibson, E. K. Wright, I. P. Pillinger, C. T. The formation of weathering products on the LEW 85320 ordinary chondrite: Evidence from carbon and oxygen stable isotope compositions and implications for carbonates in SNC meteorites |
topic_facet |
General Earth and Planetary Sciences General Environmental Science |
description |
Abstract— Isotopic analysis of nesquehonite recovered from the surface of the LEW 85320 H5 ordinary chondrite shows that the δ 13 C and δ 18 O values of the two generations of bicarbonate (Antarctic and Texas) are different: δ 13 C = +7.9‰ and +4.2‰; δ 18 O = +17.9‰ and + 12.1‰ respectively. Carbon isotopic compositions are consistent with equilibrium formation from atmospheric carbon dioxide at −2 ± 4 °C (Antarctic) and +16 ± 4 °C (Texas). Oxygen isotopic data imply that the water required for nesquehonite precipitation was derived from atmospheric water vapour or glacial meltwater which had locally exchanged with silicates, either in the meteorite or in underlying bedrock. Although carbonates with similar δ 13 C values have been identified in the SNC meteorites EETA 79001 and Nakhla, petrographic and temperature constraints argue against their simply being terrestrial weathering products. |
format |
Article in Journal/Newspaper |
author |
Grady, Monica M. Gibson, E. K. Wright, I. P. Pillinger, C. T. |
author_facet |
Grady, Monica M. Gibson, E. K. Wright, I. P. Pillinger, C. T. |
author_sort |
Grady, Monica M. |
title |
The formation of weathering products on the LEW 85320 ordinary chondrite: Evidence from carbon and oxygen stable isotope compositions and implications for carbonates in SNC meteorites |
title_short |
The formation of weathering products on the LEW 85320 ordinary chondrite: Evidence from carbon and oxygen stable isotope compositions and implications for carbonates in SNC meteorites |
title_full |
The formation of weathering products on the LEW 85320 ordinary chondrite: Evidence from carbon and oxygen stable isotope compositions and implications for carbonates in SNC meteorites |
title_fullStr |
The formation of weathering products on the LEW 85320 ordinary chondrite: Evidence from carbon and oxygen stable isotope compositions and implications for carbonates in SNC meteorites |
title_full_unstemmed |
The formation of weathering products on the LEW 85320 ordinary chondrite: Evidence from carbon and oxygen stable isotope compositions and implications for carbonates in SNC meteorites |
title_sort |
formation of weathering products on the lew 85320 ordinary chondrite: evidence from carbon and oxygen stable isotope compositions and implications for carbonates in snc meteorites |
publisher |
Wiley |
publishDate |
1989 |
url |
http://dx.doi.org/10.1111/j.1945-5100.1989.tb00934.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1945-5100.1989.tb00934.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1945-5100.1989.tb00934.x |
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Antarctic |
geographic_facet |
Antarctic |
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Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Meteoritics volume 24, issue 1, page 1-7 ISSN 0026-1114 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1945-5100.1989.tb00934.x |
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Meteoritics |
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24 |
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1 |
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1 |
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7 |
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1784259307635736576 |