Martian basalt (shergottite) Queen Alexandra Range 94201 and lunar basalt 15555: A tale of two pyroxenes
Abstract— We present here ion microprobe analyses of rare earth and other selected trace and minor elements in pyroxenes of shergottite Queen Alexandra Range 94201 and lunar basalt 15555. Pyroxene zonation patterns record the crystallization histories of these two basaltic samples from Mars and the...
Published in: | Meteoritics & Planetary Science |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
1998
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/j.1945-5100.1998.tb01636.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1945-5100.1998.tb01636.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1945-5100.1998.tb01636.x |
id |
crwiley:10.1111/j.1945-5100.1998.tb01636.x |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/j.1945-5100.1998.tb01636.x 2024-09-15T17:43:46+00:00 Martian basalt (shergottite) Queen Alexandra Range 94201 and lunar basalt 15555: A tale of two pyroxenes WADHWA, M. CROZAZ, G. TAYLOR, L. A. MCSWEEN, H. Y. 1998 http://dx.doi.org/10.1111/j.1945-5100.1998.tb01636.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1945-5100.1998.tb01636.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1945-5100.1998.tb01636.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Meteoritics & Planetary Science volume 33, issue 2, page 321-328 ISSN 1086-9379 1945-5100 journal-article 1998 crwiley https://doi.org/10.1111/j.1945-5100.1998.tb01636.x 2024-07-25T04:22:33Z Abstract— We present here ion microprobe analyses of rare earth and other selected trace and minor elements in pyroxenes of shergottite Queen Alexandra Range 94201 and lunar basalt 15555. Pyroxene zonation patterns record the crystallization histories of these two basaltic samples from Mars and the Moon, respectively, and allow a comparison of mafic melt evolution on these two planetary bodies. Elemental abundances and trends in pyroxenes of these two rocks indicate that their minerals formed by continuous, closed system fractional crystallization of their respective parent melts. This further supports the idea that QUE 94201 closely represents the composition of a true Martian basaltic melt (McSween et al. , 1996). The main differences in pyroxene elemental zonation patterns in these two objects are attributed to earlier crystallization of whitlockite in QUE 94201 ( i.e. , before the Fe‐rich pyroxenes) than in 15555 (after the Fe‐rich pyroxenes). The size of Eu anomalies in pyroxenes of QUE 94201 is intermediate between that in pyroxenes of 15555 and the other shergottites and may imply that fO 2 conditions during crystallization of this Martian basalt were significantly more reducing than for other shergottites, although not quite as reducing as for lunar basalts. Cerium anomalies appear to be less prevalent in pyroxenes of QUE 94201 than other Antarctic shergottites and could be indicative of lesser degree of weathering in the Antarctic. Article in Journal/Newspaper Antarc* Antarctic Wiley Online Library Meteoritics & Planetary Science 33 2 321 328 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract— We present here ion microprobe analyses of rare earth and other selected trace and minor elements in pyroxenes of shergottite Queen Alexandra Range 94201 and lunar basalt 15555. Pyroxene zonation patterns record the crystallization histories of these two basaltic samples from Mars and the Moon, respectively, and allow a comparison of mafic melt evolution on these two planetary bodies. Elemental abundances and trends in pyroxenes of these two rocks indicate that their minerals formed by continuous, closed system fractional crystallization of their respective parent melts. This further supports the idea that QUE 94201 closely represents the composition of a true Martian basaltic melt (McSween et al. , 1996). The main differences in pyroxene elemental zonation patterns in these two objects are attributed to earlier crystallization of whitlockite in QUE 94201 ( i.e. , before the Fe‐rich pyroxenes) than in 15555 (after the Fe‐rich pyroxenes). The size of Eu anomalies in pyroxenes of QUE 94201 is intermediate between that in pyroxenes of 15555 and the other shergottites and may imply that fO 2 conditions during crystallization of this Martian basalt were significantly more reducing than for other shergottites, although not quite as reducing as for lunar basalts. Cerium anomalies appear to be less prevalent in pyroxenes of QUE 94201 than other Antarctic shergottites and could be indicative of lesser degree of weathering in the Antarctic. |
format |
Article in Journal/Newspaper |
author |
WADHWA, M. CROZAZ, G. TAYLOR, L. A. MCSWEEN, H. Y. |
spellingShingle |
WADHWA, M. CROZAZ, G. TAYLOR, L. A. MCSWEEN, H. Y. Martian basalt (shergottite) Queen Alexandra Range 94201 and lunar basalt 15555: A tale of two pyroxenes |
author_facet |
WADHWA, M. CROZAZ, G. TAYLOR, L. A. MCSWEEN, H. Y. |
author_sort |
WADHWA, M. |
title |
Martian basalt (shergottite) Queen Alexandra Range 94201 and lunar basalt 15555: A tale of two pyroxenes |
title_short |
Martian basalt (shergottite) Queen Alexandra Range 94201 and lunar basalt 15555: A tale of two pyroxenes |
title_full |
Martian basalt (shergottite) Queen Alexandra Range 94201 and lunar basalt 15555: A tale of two pyroxenes |
title_fullStr |
Martian basalt (shergottite) Queen Alexandra Range 94201 and lunar basalt 15555: A tale of two pyroxenes |
title_full_unstemmed |
Martian basalt (shergottite) Queen Alexandra Range 94201 and lunar basalt 15555: A tale of two pyroxenes |
title_sort |
martian basalt (shergottite) queen alexandra range 94201 and lunar basalt 15555: a tale of two pyroxenes |
publisher |
Wiley |
publishDate |
1998 |
url |
http://dx.doi.org/10.1111/j.1945-5100.1998.tb01636.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1945-5100.1998.tb01636.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1945-5100.1998.tb01636.x |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Meteoritics & Planetary Science volume 33, issue 2, page 321-328 ISSN 1086-9379 1945-5100 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1945-5100.1998.tb01636.x |
container_title |
Meteoritics & Planetary Science |
container_volume |
33 |
container_issue |
2 |
container_start_page |
321 |
op_container_end_page |
328 |
_version_ |
1810490947399581696 |