Lunar meteorite LaPaz Icefield 04841: Petrology, texture, and impact-shock effects of a low-Ti mare basalt
Found during the 2004 U.S. Antarctic Search for Meteorites season, LaPaz Icefield (LAP) 04841 represents an addition to the LaPaz lunar basalts suite and brings the total mass collected to 1.93 kg. The presence of FeNi grains, troilite, and the anorthositic composition of plagioclase are evidence fo...
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ftunivarizonaojs:oai:journals.uair.arizona.edu:article/15686 2023-05-15T13:42:28+02:00 Lunar meteorite LaPaz Icefield 04841: Petrology, texture, and impact-shock effects of a low-Ti mare basalt HILL, E. TAYLOR, L. A. FLOSS, C. LIU, Y. 2009-01-01 application/pdf https://journals.uair.arizona.edu/index.php/maps/article/view/15686 eng eng Meteoritics & Planetary Science Archives https://journals.uair.arizona.edu/index.php/maps/article/view/15686/15674 https://journals.uair.arizona.edu/index.php/maps/article/view/15686 Meteoritics & Planetary Science Archives; Vol 44, No 1 (2009); 87-94 1945-5100 1086-9379 Trace elements;lunar Meteorites;paired Meteorites;Modal composition info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article 2009 ftunivarizonaojs 2020-11-14T17:53:01Z Found during the 2004 U.S. Antarctic Search for Meteorites season, LaPaz Icefield (LAP) 04841 represents an addition to the LaPaz lunar basalts suite and brings the total mass collected to 1.93 kg. The presence of FeNi grains, troilite, and the anorthositic composition of plagioclase are evidence for the lunar origin of this meteorite. Pyroxene and olivine Mn/Fe values plot along the trend set for lunar basalts. Analyses of chromite grains provide a V/(Al + Cr) ratio of 1.33 13, translating to an fO2 one log unit below the IW buffer, in accordance with previous fO2 estimates for lunar basalts. Application of the Zr-cooling speedometer, for ilmenite and ulvspinel pairs, gives a cooling rate of 5.2 C/day, matching previous estimates of cooling rates for the LaPaz lunar meteorites and Apollo mare basalts. Mineral modes and chemistries, as well as trace-element patterns, provide compelling evidence for pairing of this meteorite to others in the LaPaz lunar basalt suite. Article in Journal/Newspaper Antarc* Antarctic Journals at the University of Arizona Antarctic |
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Open Polar |
collection |
Journals at the University of Arizona |
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ftunivarizonaojs |
language |
English |
topic |
Trace elements;lunar Meteorites;paired Meteorites;Modal composition |
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Trace elements;lunar Meteorites;paired Meteorites;Modal composition HILL, E. TAYLOR, L. A. FLOSS, C. LIU, Y. Lunar meteorite LaPaz Icefield 04841: Petrology, texture, and impact-shock effects of a low-Ti mare basalt |
topic_facet |
Trace elements;lunar Meteorites;paired Meteorites;Modal composition |
description |
Found during the 2004 U.S. Antarctic Search for Meteorites season, LaPaz Icefield (LAP) 04841 represents an addition to the LaPaz lunar basalts suite and brings the total mass collected to 1.93 kg. The presence of FeNi grains, troilite, and the anorthositic composition of plagioclase are evidence for the lunar origin of this meteorite. Pyroxene and olivine Mn/Fe values plot along the trend set for lunar basalts. Analyses of chromite grains provide a V/(Al + Cr) ratio of 1.33 13, translating to an fO2 one log unit below the IW buffer, in accordance with previous fO2 estimates for lunar basalts. Application of the Zr-cooling speedometer, for ilmenite and ulvspinel pairs, gives a cooling rate of 5.2 C/day, matching previous estimates of cooling rates for the LaPaz lunar meteorites and Apollo mare basalts. Mineral modes and chemistries, as well as trace-element patterns, provide compelling evidence for pairing of this meteorite to others in the LaPaz lunar basalt suite. |
format |
Article in Journal/Newspaper |
author |
HILL, E. TAYLOR, L. A. FLOSS, C. LIU, Y. |
author_facet |
HILL, E. TAYLOR, L. A. FLOSS, C. LIU, Y. |
author_sort |
HILL, E. |
title |
Lunar meteorite LaPaz Icefield 04841: Petrology, texture, and impact-shock effects of a low-Ti mare basalt |
title_short |
Lunar meteorite LaPaz Icefield 04841: Petrology, texture, and impact-shock effects of a low-Ti mare basalt |
title_full |
Lunar meteorite LaPaz Icefield 04841: Petrology, texture, and impact-shock effects of a low-Ti mare basalt |
title_fullStr |
Lunar meteorite LaPaz Icefield 04841: Petrology, texture, and impact-shock effects of a low-Ti mare basalt |
title_full_unstemmed |
Lunar meteorite LaPaz Icefield 04841: Petrology, texture, and impact-shock effects of a low-Ti mare basalt |
title_sort |
lunar meteorite lapaz icefield 04841: petrology, texture, and impact-shock effects of a low-ti mare basalt |
publisher |
Meteoritics & Planetary Science Archives |
publishDate |
2009 |
url |
https://journals.uair.arizona.edu/index.php/maps/article/view/15686 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Meteoritics & Planetary Science Archives; Vol 44, No 1 (2009); 87-94 1945-5100 1086-9379 |
op_relation |
https://journals.uair.arizona.edu/index.php/maps/article/view/15686/15674 https://journals.uair.arizona.edu/index.php/maps/article/view/15686 |
_version_ |
1766168284891185152 |