Mineralogical, Chemical, and Isotopic Heterogeneity in Zagami: Evidence for a Complex Petrogenesis
Textural variations in the shergottite Zagami were initially interpreted as evidence that it formed in a heterogeneous lava flow. Variations in initial Sr-87/Sr-86 ratios between a Coarse Grained (CG) and a Fine Grained (FG) lithology and evidence for more extensive fractionation of the Rb/Sr ratio...
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ftnasantrs:oai:casi.ntrs.nasa.gov:20140003575 2023-05-15T16:01:18+02:00 Mineralogical, Chemical, and Isotopic Heterogeneity in Zagami: Evidence for a Complex Petrogenesis Park, J. Misawa, K. Nyquist, L. E. Shih, C-Y. Niihara, T. Unclassified, Unlimited, Publicly available November 12, 2013 application/pdf http://hdl.handle.net/2060/20140003575 unknown Document ID: 20140003575 http://hdl.handle.net/2060/20140003575 Copyright, Distribution as joint owner in the copyright CASI Lunar and Planetary Science and Exploration JSC-CN-29722 Symposium on Polar Science; 12-15 Nov 2013; Tokyo; Japan 2013 ftnasantrs 2019-07-21T00:32:53Z Textural variations in the shergottite Zagami were initially interpreted as evidence that it formed in a heterogeneous lava flow. Variations in initial Sr-87/Sr-86 ratios between a Coarse Grained (CG) and a Fine Grained (FG) lithology and evidence for more extensive fractionation of the Rb/Sr ratio in a Dark Mottled Lithology (DML) are consistent with such an interpretation. More recently, Niihara et al. and Misawa et al. have reported the mineralogy and Sr-isotopic systematics of an Olivine Rich Lithology (ORL) found in association with the coarse-grained DML lithology in the Kanagawa Zagami specimen [6,7]. Here we call this lithology DML(Ka) to maintain a distinction with DML(USNM) as studied. An Ar-Ar study by Park et al. of a late stage K-rich melt enriched in K2O to approx 7% and intruded into ORL yielded an Ar-Ar age of 202+/0 7 Ma. The present work extends the study of Kanagawa Zagami to Nd-isotopes. Other/Unknown Material DML NASA Technical Reports Server (NTRS) |
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Open Polar |
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NASA Technical Reports Server (NTRS) |
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unknown |
topic |
Lunar and Planetary Science and Exploration |
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Lunar and Planetary Science and Exploration Park, J. Misawa, K. Nyquist, L. E. Shih, C-Y. Niihara, T. Mineralogical, Chemical, and Isotopic Heterogeneity in Zagami: Evidence for a Complex Petrogenesis |
topic_facet |
Lunar and Planetary Science and Exploration |
description |
Textural variations in the shergottite Zagami were initially interpreted as evidence that it formed in a heterogeneous lava flow. Variations in initial Sr-87/Sr-86 ratios between a Coarse Grained (CG) and a Fine Grained (FG) lithology and evidence for more extensive fractionation of the Rb/Sr ratio in a Dark Mottled Lithology (DML) are consistent with such an interpretation. More recently, Niihara et al. and Misawa et al. have reported the mineralogy and Sr-isotopic systematics of an Olivine Rich Lithology (ORL) found in association with the coarse-grained DML lithology in the Kanagawa Zagami specimen [6,7]. Here we call this lithology DML(Ka) to maintain a distinction with DML(USNM) as studied. An Ar-Ar study by Park et al. of a late stage K-rich melt enriched in K2O to approx 7% and intruded into ORL yielded an Ar-Ar age of 202+/0 7 Ma. The present work extends the study of Kanagawa Zagami to Nd-isotopes. |
format |
Other/Unknown Material |
author |
Park, J. Misawa, K. Nyquist, L. E. Shih, C-Y. Niihara, T. |
author_facet |
Park, J. Misawa, K. Nyquist, L. E. Shih, C-Y. Niihara, T. |
author_sort |
Park, J. |
title |
Mineralogical, Chemical, and Isotopic Heterogeneity in Zagami: Evidence for a Complex Petrogenesis |
title_short |
Mineralogical, Chemical, and Isotopic Heterogeneity in Zagami: Evidence for a Complex Petrogenesis |
title_full |
Mineralogical, Chemical, and Isotopic Heterogeneity in Zagami: Evidence for a Complex Petrogenesis |
title_fullStr |
Mineralogical, Chemical, and Isotopic Heterogeneity in Zagami: Evidence for a Complex Petrogenesis |
title_full_unstemmed |
Mineralogical, Chemical, and Isotopic Heterogeneity in Zagami: Evidence for a Complex Petrogenesis |
title_sort |
mineralogical, chemical, and isotopic heterogeneity in zagami: evidence for a complex petrogenesis |
publishDate |
2013 |
url |
http://hdl.handle.net/2060/20140003575 |
op_coverage |
Unclassified, Unlimited, Publicly available |
genre |
DML |
genre_facet |
DML |
op_source |
CASI |
op_relation |
Document ID: 20140003575 http://hdl.handle.net/2060/20140003575 |
op_rights |
Copyright, Distribution as joint owner in the copyright |
_version_ |
1766397221400477696 |