Modal studies of mesosiderites and related achondrites, including the new mesosiderite ALHA 77219
The Antarctic meteorite ALHA 77219 is found to be a new mesosiderite. It contains about 25% metal + troilite (+ rust) and the brecciated silicate portion is dominated by orthopyroxene (En 68-71). These features, together with the presence of olivine surrounded by coronas, and abundant tridymite + ph...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19820038775 2023-05-15T13:46:48+02:00 Modal studies of mesosiderites and related achondrites, including the new mesosiderite ALHA 77219 Prinz, M. Delaney, J. S. Harlow, G. E. Bedell, R. L. Nehru, C. E. Unclassified, Unlimited, Publicly available JAN 1, 1980 http://ntrs.nasa.gov/search.jsp?R=19820038775 unknown http://ntrs.nasa.gov/search.jsp?R=19820038775 Accession ID: 82A22310 Copyright Other Sources 91 Lunar and Planetary Science Conference; March 17-21, 1980; Houston, TX 1980 ftnasantrs 2012-02-15T15:02:07Z The Antarctic meteorite ALHA 77219 is found to be a new mesosiderite. It contains about 25% metal + troilite (+ rust) and the brecciated silicate portion is dominated by orthopyroxene (En 68-71). These features, together with the presence of olivine surrounded by coronas, and abundant tridymite + phosphate conform to the characteristics of mesosiderites. A comparison of the modal abundances of minerals in 77219 with modes of 20 mesosiderites, 14 howardites, six basaltic eucrites, three feldspar cumulate eucrites, and one orthopyroxene cumulate eucrite shows that there are major differences between mesosiderites and howardites. These differences are described in detail. Other/Unknown Material Antarc* Antarctic NASA Technical Reports Server (NTRS) Antarctic The Antarctic |
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NASA Technical Reports Server (NTRS) |
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91 |
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91 Prinz, M. Delaney, J. S. Harlow, G. E. Bedell, R. L. Nehru, C. E. Modal studies of mesosiderites and related achondrites, including the new mesosiderite ALHA 77219 |
topic_facet |
91 |
description |
The Antarctic meteorite ALHA 77219 is found to be a new mesosiderite. It contains about 25% metal + troilite (+ rust) and the brecciated silicate portion is dominated by orthopyroxene (En 68-71). These features, together with the presence of olivine surrounded by coronas, and abundant tridymite + phosphate conform to the characteristics of mesosiderites. A comparison of the modal abundances of minerals in 77219 with modes of 20 mesosiderites, 14 howardites, six basaltic eucrites, three feldspar cumulate eucrites, and one orthopyroxene cumulate eucrite shows that there are major differences between mesosiderites and howardites. These differences are described in detail. |
format |
Other/Unknown Material |
author |
Prinz, M. Delaney, J. S. Harlow, G. E. Bedell, R. L. Nehru, C. E. |
author_facet |
Prinz, M. Delaney, J. S. Harlow, G. E. Bedell, R. L. Nehru, C. E. |
author_sort |
Prinz, M. |
title |
Modal studies of mesosiderites and related achondrites, including the new mesosiderite ALHA 77219 |
title_short |
Modal studies of mesosiderites and related achondrites, including the new mesosiderite ALHA 77219 |
title_full |
Modal studies of mesosiderites and related achondrites, including the new mesosiderite ALHA 77219 |
title_fullStr |
Modal studies of mesosiderites and related achondrites, including the new mesosiderite ALHA 77219 |
title_full_unstemmed |
Modal studies of mesosiderites and related achondrites, including the new mesosiderite ALHA 77219 |
title_sort |
modal studies of mesosiderites and related achondrites, including the new mesosiderite alha 77219 |
publishDate |
1980 |
url |
http://ntrs.nasa.gov/search.jsp?R=19820038775 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19820038775 Accession ID: 82A22310 |
op_rights |
Copyright |
_version_ |
1766245230245314560 |