Comparison of Yamato and Victoria Land polymict eucrites - A view from mineralogical and isotopic studies
New interior samples of four Yamato polymict eucrites (Y74159, Y74450, Y75011, and Y75015) have been studied by electron microprobe, transmission electron microscope, and X-ray diffraction techniques, and compared with several samples of the Victoria Land polymict eucrites. These same samples have b...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19840035685 2023-05-15T18:42:52+02:00 Comparison of Yamato and Victoria Land polymict eucrites - A view from mineralogical and isotopic studies Takeda, H. Mori, H. Wooden, J. L. Nyquist, L. E. Delaney, J. S. Prinz, M. Unclassified, Unlimited, Publicly available Nov 15, 1983 http://ntrs.nasa.gov/search.jsp?R=19840035685 unknown http://ntrs.nasa.gov/search.jsp?R=19840035685 Accession ID: 84A18472 Copyright Other Sources 46 Journal of Geophysical Research, Supplement; 88; B245-B25 1983 ftnasantrs 2012-02-15T15:49:23Z New interior samples of four Yamato polymict eucrites (Y74159, Y74450, Y75011, and Y75015) have been studied by electron microprobe, transmission electron microscope, and X-ray diffraction techniques, and compared with several samples of the Victoria Land polymict eucrites. These same samples have been analysed using Rb-Sr and Nd-Sm isotopic systematics. Several grains of inverted pigeonite, with blebby augite similar to those in Binda and Moama, have been identified in all four Yamato eucrites. Coarse-grained meso-stasis-rich subophitic basalts, which contain Mg-rich pigeonite (with Fe-rich olivine veinlets) zoned outward to a subcalcic ferroaugite rims, have also been found. These unique clasts were not found in ALH76005, 77302, 78040, 7858, and 78165 and EET eucrites. The tight grouping of Rb/Sr and Sm/Nd ratos, and similar modal compositions of the Yamato group indicate that they are most likely to be pieces from a single fall, and distinct from the ALH and EET groups. However, the Yamato, Allan Hills, and Elephant Moraine groups may sample a few distinct magmas or similar but different source regions on the same parent body. Other/Unknown Material Victoria Land NASA Technical Reports Server (NTRS) Allan Hills ENVELOPE(159.667,159.667,-76.717,-76.717) Elephant Moraine ENVELOPE(157.233,157.233,-76.300,-76.300) Victoria Land Yamato ENVELOPE(35.583,35.583,-71.417,-71.417) |
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NASA Technical Reports Server (NTRS) |
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46 Takeda, H. Mori, H. Wooden, J. L. Nyquist, L. E. Delaney, J. S. Prinz, M. Comparison of Yamato and Victoria Land polymict eucrites - A view from mineralogical and isotopic studies |
topic_facet |
46 |
description |
New interior samples of four Yamato polymict eucrites (Y74159, Y74450, Y75011, and Y75015) have been studied by electron microprobe, transmission electron microscope, and X-ray diffraction techniques, and compared with several samples of the Victoria Land polymict eucrites. These same samples have been analysed using Rb-Sr and Nd-Sm isotopic systematics. Several grains of inverted pigeonite, with blebby augite similar to those in Binda and Moama, have been identified in all four Yamato eucrites. Coarse-grained meso-stasis-rich subophitic basalts, which contain Mg-rich pigeonite (with Fe-rich olivine veinlets) zoned outward to a subcalcic ferroaugite rims, have also been found. These unique clasts were not found in ALH76005, 77302, 78040, 7858, and 78165 and EET eucrites. The tight grouping of Rb/Sr and Sm/Nd ratos, and similar modal compositions of the Yamato group indicate that they are most likely to be pieces from a single fall, and distinct from the ALH and EET groups. However, the Yamato, Allan Hills, and Elephant Moraine groups may sample a few distinct magmas or similar but different source regions on the same parent body. |
format |
Other/Unknown Material |
author |
Takeda, H. Mori, H. Wooden, J. L. Nyquist, L. E. Delaney, J. S. Prinz, M. |
author_facet |
Takeda, H. Mori, H. Wooden, J. L. Nyquist, L. E. Delaney, J. S. Prinz, M. |
author_sort |
Takeda, H. |
title |
Comparison of Yamato and Victoria Land polymict eucrites - A view from mineralogical and isotopic studies |
title_short |
Comparison of Yamato and Victoria Land polymict eucrites - A view from mineralogical and isotopic studies |
title_full |
Comparison of Yamato and Victoria Land polymict eucrites - A view from mineralogical and isotopic studies |
title_fullStr |
Comparison of Yamato and Victoria Land polymict eucrites - A view from mineralogical and isotopic studies |
title_full_unstemmed |
Comparison of Yamato and Victoria Land polymict eucrites - A view from mineralogical and isotopic studies |
title_sort |
comparison of yamato and victoria land polymict eucrites - a view from mineralogical and isotopic studies |
publishDate |
1983 |
url |
http://ntrs.nasa.gov/search.jsp?R=19840035685 |
op_coverage |
Unclassified, Unlimited, Publicly available |
long_lat |
ENVELOPE(159.667,159.667,-76.717,-76.717) ENVELOPE(157.233,157.233,-76.300,-76.300) ENVELOPE(35.583,35.583,-71.417,-71.417) |
geographic |
Allan Hills Elephant Moraine Victoria Land Yamato |
geographic_facet |
Allan Hills Elephant Moraine Victoria Land Yamato |
genre |
Victoria Land |
genre_facet |
Victoria Land |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19840035685 Accession ID: 84A18472 |
op_rights |
Copyright |
_version_ |
1766232634945437696 |