Coordinated Analysis of Organic Matter in Primitive Meteorites
Carbonaceous chondrites (CC) preserve a diverse range of organic matter formed within cold interstellar environments, the solar nebula, and during subsequent parent body asteroidal processing. This organic matter maintains a unique geochemical and istopic record of organic evolution [1-4]. Bulk stud...
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ftnasantrs:oai:casi.ntrs.nasa.gov:20190000101 2023-05-15T18:30:05+02:00 Coordinated Analysis of Organic Matter in Primitive Meteorites Nevill, N. Thomas-Keprta, K. L. Messenger, S. Clemett, S. J. Unclassified, Unlimited, Publicly available March 19, 2018 application/pdf http://hdl.handle.net/2060/20190000101 unknown Document ID: 20190000101 http://hdl.handle.net/2060/20190000101 Copyright, Public use permitted CASI Lunar and Planetary Science and Exploration LPI Contrib. No. 2083 JSC-E-DAA-TN55978 Lunar and Planetary Science Conference (LPSC 2018); 19-23 Mar. 2018; The Woodlands, TX; United States 2018 ftnasantrs 2019-07-20T23:07:21Z Carbonaceous chondrites (CC) preserve a diverse range of organic matter formed within cold interstellar environments, the solar nebula, and during subsequent parent body asteroidal processing. This organic matter maintains a unique geochemical and istopic record of organic evolution [1-4]. Bulk studies of organics within CC have revealed a complex array of organic species. However, bulk studies invariably involve solvent extraction, resulting in a loss of spatial context of the host mineral matrix [3, 5]. Correlated in situ chemical and isotopic studies suggest preservation of interstellar organics in the form of spherical, often hollow, micrometer sized organic nano-globules. Nanoglobules often exhibit significant delta 15N and delta D enrichments that imply formation through fractionation of ion-molecule reactions within cold molecular clouds and/or the outer protoplanetary disk [5]. In situ studies such as 6-8 are necessary to understand the organic evolutionary stages of nanoglobules and other components in the nebula and parent body [7]. We carried out coordinated in situ micrometer-scale chemical, mineralogical and isotopic studies of the Murchison (CM2), QUE 99177 (CR3), and Tagish Lake (C2 Ung) CC. These studies were performed using fluorescent microscopy, two-step laser mass spectrometry (microL2MS), NanoSIMS, and Scanning Electron Microscopy (SEM) with Energy Dispersive X-Ray Spectroscopy (EDX). Comparative analysis of three different meteorites will help reveal the effects of parent body processes on the chemistry and isotopic composition of organic matter. Other/Unknown Material Tagish NASA Technical Reports Server (NTRS) Murchison ENVELOPE(144.250,144.250,-67.317,-67.317) Tagish ENVELOPE(-134.272,-134.272,60.313,60.313) Tagish Lake ENVELOPE(-134.233,-134.233,59.717,59.717) |
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NASA Technical Reports Server (NTRS) |
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ftnasantrs |
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topic |
Lunar and Planetary Science and Exploration |
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Lunar and Planetary Science and Exploration Nevill, N. Thomas-Keprta, K. L. Messenger, S. Clemett, S. J. Coordinated Analysis of Organic Matter in Primitive Meteorites |
topic_facet |
Lunar and Planetary Science and Exploration |
description |
Carbonaceous chondrites (CC) preserve a diverse range of organic matter formed within cold interstellar environments, the solar nebula, and during subsequent parent body asteroidal processing. This organic matter maintains a unique geochemical and istopic record of organic evolution [1-4]. Bulk studies of organics within CC have revealed a complex array of organic species. However, bulk studies invariably involve solvent extraction, resulting in a loss of spatial context of the host mineral matrix [3, 5]. Correlated in situ chemical and isotopic studies suggest preservation of interstellar organics in the form of spherical, often hollow, micrometer sized organic nano-globules. Nanoglobules often exhibit significant delta 15N and delta D enrichments that imply formation through fractionation of ion-molecule reactions within cold molecular clouds and/or the outer protoplanetary disk [5]. In situ studies such as 6-8 are necessary to understand the organic evolutionary stages of nanoglobules and other components in the nebula and parent body [7]. We carried out coordinated in situ micrometer-scale chemical, mineralogical and isotopic studies of the Murchison (CM2), QUE 99177 (CR3), and Tagish Lake (C2 Ung) CC. These studies were performed using fluorescent microscopy, two-step laser mass spectrometry (microL2MS), NanoSIMS, and Scanning Electron Microscopy (SEM) with Energy Dispersive X-Ray Spectroscopy (EDX). Comparative analysis of three different meteorites will help reveal the effects of parent body processes on the chemistry and isotopic composition of organic matter. |
format |
Other/Unknown Material |
author |
Nevill, N. Thomas-Keprta, K. L. Messenger, S. Clemett, S. J. |
author_facet |
Nevill, N. Thomas-Keprta, K. L. Messenger, S. Clemett, S. J. |
author_sort |
Nevill, N. |
title |
Coordinated Analysis of Organic Matter in Primitive Meteorites |
title_short |
Coordinated Analysis of Organic Matter in Primitive Meteorites |
title_full |
Coordinated Analysis of Organic Matter in Primitive Meteorites |
title_fullStr |
Coordinated Analysis of Organic Matter in Primitive Meteorites |
title_full_unstemmed |
Coordinated Analysis of Organic Matter in Primitive Meteorites |
title_sort |
coordinated analysis of organic matter in primitive meteorites |
publishDate |
2018 |
url |
http://hdl.handle.net/2060/20190000101 |
op_coverage |
Unclassified, Unlimited, Publicly available |
long_lat |
ENVELOPE(144.250,144.250,-67.317,-67.317) ENVELOPE(-134.272,-134.272,60.313,60.313) ENVELOPE(-134.233,-134.233,59.717,59.717) |
geographic |
Murchison Tagish Tagish Lake |
geographic_facet |
Murchison Tagish Tagish Lake |
genre |
Tagish |
genre_facet |
Tagish |
op_source |
CASI |
op_relation |
Document ID: 20190000101 http://hdl.handle.net/2060/20190000101 |
op_rights |
Copyright, Public use permitted |
_version_ |
1766213568822247424 |