Oxygen isotopic composition of chondritic interplanetary dust particles: A genetic link between carbonaceous chondrites and comets
Oxygen isotopes were measured in four chondritic hydrated interplanetary dust particles (IDPs) and five chondritic anhydrous IDPs including two GEMS-rich particles (Glass embedded with metal and sulfides) by a combination of high precision and high lateral resolution ion microprobe techniques. All I...
Published in: | Geochimica et Cosmochimica Acta |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Elsevier
2009
|
Subjects: | |
Online Access: | https://doi.org/10.1016/j.gca.2009.04.034 |
id |
ftcaltechauth:oai:authors.library.caltech.edu:vd5h1-m6126 |
---|---|
record_format |
openpolar |
spelling |
ftcaltechauth:oai:authors.library.caltech.edu:vd5h1-m6126 2024-10-13T14:02:35+00:00 Oxygen isotopic composition of chondritic interplanetary dust particles: A genetic link between carbonaceous chondrites and comets Aléon, J. Engrand, C. Leshin, L. A. McKeegan, K. D. 2009-08-01 https://doi.org/10.1016/j.gca.2009.04.034 unknown Elsevier https://doi.org/10.1016/j.gca.2009.04.034 eprintid:119721 info:eu-repo/semantics/closedAccess Other Geochimica et Cosmochimica Acta, 73(15), 4558-4575, (2009-08-01) Geochemistry and Petrology info:eu-repo/semantics/article 2009 ftcaltechauth https://doi.org/10.1016/j.gca.2009.04.034 2024-09-25T18:46:38Z Oxygen isotopes were measured in four chondritic hydrated interplanetary dust particles (IDPs) and five chondritic anhydrous IDPs including two GEMS-rich particles (Glass embedded with metal and sulfides) by a combination of high precision and high lateral resolution ion microprobe techniques. All IDPs have isotopic compositions tightly clustered around that of solar system planetary materials. Hydrated IDPs have mass-fractionated oxygen isotopic compositions similar to those of CI and CM carbonaceous chondrites, consistent with hydration of initially anhydrous protosolar dust. Anhydrous IDPs have small 16O excesses and depletions similar to those of carbonaceous chondrites, the largest ¹â¶O variations being hosted by the two GEMS-rich IDPs. Coarse-grained forsteritic olivine and enstatite in anhydrous IDPs are isotopically similar to their counterparts in comet Wild 2 and in chondrules suggesting a high temperature inner solar system origin. The small variations in the ¹â¶O content of GEMS-rich IDPs suggest that most GEMS either do not preserve a record of interstellar processes or the initial interstellar dust is not ¹â¶O-rich as expected by self-shielding models, although a larger dataset is required to verify these conclusions. Together with other chemical and mineralogical indicators, O isotopes show that the parent-bodies of carbonaceous chondrites, of chondritic IDPs, of most Antarctic micrometeorites, and comet Wild 2 belong to a single family of objects of carbonaceous chondrite chemical affinity as distinct from ordinary, enstatite, K- and R-chondrites. Comparison with astronomical observations thus suggests a chemical continuum of objects including main belt and outer solar system asteroids such as C-type, P-type and D-type asteroids, Trojans and Centaurs as well as short-period comets and other Kuiper Belt Objects. We would like to thank John Bradley and Don Brownlee for providing the IDPs studied in 1999 and the curation team at the Johnson Space Center for providing the IDPs studied in 2005. ... Article in Journal/Newspaper Antarc* Antarctic Caltech Authors (California Institute of Technology) Antarctic Geochimica et Cosmochimica Acta 73 15 4558 4575 |
institution |
Open Polar |
collection |
Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
unknown |
topic |
Geochemistry and Petrology |
spellingShingle |
Geochemistry and Petrology Aléon, J. Engrand, C. Leshin, L. A. McKeegan, K. D. Oxygen isotopic composition of chondritic interplanetary dust particles: A genetic link between carbonaceous chondrites and comets |
topic_facet |
Geochemistry and Petrology |
description |
Oxygen isotopes were measured in four chondritic hydrated interplanetary dust particles (IDPs) and five chondritic anhydrous IDPs including two GEMS-rich particles (Glass embedded with metal and sulfides) by a combination of high precision and high lateral resolution ion microprobe techniques. All IDPs have isotopic compositions tightly clustered around that of solar system planetary materials. Hydrated IDPs have mass-fractionated oxygen isotopic compositions similar to those of CI and CM carbonaceous chondrites, consistent with hydration of initially anhydrous protosolar dust. Anhydrous IDPs have small 16O excesses and depletions similar to those of carbonaceous chondrites, the largest ¹â¶O variations being hosted by the two GEMS-rich IDPs. Coarse-grained forsteritic olivine and enstatite in anhydrous IDPs are isotopically similar to their counterparts in comet Wild 2 and in chondrules suggesting a high temperature inner solar system origin. The small variations in the ¹â¶O content of GEMS-rich IDPs suggest that most GEMS either do not preserve a record of interstellar processes or the initial interstellar dust is not ¹â¶O-rich as expected by self-shielding models, although a larger dataset is required to verify these conclusions. Together with other chemical and mineralogical indicators, O isotopes show that the parent-bodies of carbonaceous chondrites, of chondritic IDPs, of most Antarctic micrometeorites, and comet Wild 2 belong to a single family of objects of carbonaceous chondrite chemical affinity as distinct from ordinary, enstatite, K- and R-chondrites. Comparison with astronomical observations thus suggests a chemical continuum of objects including main belt and outer solar system asteroids such as C-type, P-type and D-type asteroids, Trojans and Centaurs as well as short-period comets and other Kuiper Belt Objects. We would like to thank John Bradley and Don Brownlee for providing the IDPs studied in 1999 and the curation team at the Johnson Space Center for providing the IDPs studied in 2005. ... |
format |
Article in Journal/Newspaper |
author |
Aléon, J. Engrand, C. Leshin, L. A. McKeegan, K. D. |
author_facet |
Aléon, J. Engrand, C. Leshin, L. A. McKeegan, K. D. |
author_sort |
Aléon, J. |
title |
Oxygen isotopic composition of chondritic interplanetary dust particles: A genetic link between carbonaceous chondrites and comets |
title_short |
Oxygen isotopic composition of chondritic interplanetary dust particles: A genetic link between carbonaceous chondrites and comets |
title_full |
Oxygen isotopic composition of chondritic interplanetary dust particles: A genetic link between carbonaceous chondrites and comets |
title_fullStr |
Oxygen isotopic composition of chondritic interplanetary dust particles: A genetic link between carbonaceous chondrites and comets |
title_full_unstemmed |
Oxygen isotopic composition of chondritic interplanetary dust particles: A genetic link between carbonaceous chondrites and comets |
title_sort |
oxygen isotopic composition of chondritic interplanetary dust particles: a genetic link between carbonaceous chondrites and comets |
publisher |
Elsevier |
publishDate |
2009 |
url |
https://doi.org/10.1016/j.gca.2009.04.034 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Geochimica et Cosmochimica Acta, 73(15), 4558-4575, (2009-08-01) |
op_relation |
https://doi.org/10.1016/j.gca.2009.04.034 eprintid:119721 |
op_rights |
info:eu-repo/semantics/closedAccess Other |
op_doi |
https://doi.org/10.1016/j.gca.2009.04.034 |
container_title |
Geochimica et Cosmochimica Acta |
container_volume |
73 |
container_issue |
15 |
container_start_page |
4558 |
op_container_end_page |
4575 |
_version_ |
1812818492364161024 |