Minor/major element variation within and among diogenite and howardite orthopyroxenite groups
Diogenites are orthopyroxenites that may contain chromite and olivine as accessory minerals. Howardite breccias contain orthopyroxenite clasts with similar properties compared to monomict diogenites. We used statistical methods and variation plots of major and minor elements in orthopyroxene and chr...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19930029966 2023-05-15T14:04:19+02:00 Minor/major element variation within and among diogenite and howardite orthopyroxenite groups Berkley, John L. Boynton, Nancy J. Unclassified, Unlimited, Publicly available Sept. 1992 http://ntrs.nasa.gov/search.jsp?R=19930029966 unknown http://ntrs.nasa.gov/search.jsp?R=19930029966 Accession ID: 93A13963 Copyright Other Sources 91 Meteoritics; 27; 4; p. 387-394. 1992 ftnasantrs 2012-02-15T19:58:05Z Diogenites are orthopyroxenites that may contain chromite and olivine as accessory minerals. Howardite breccias contain orthopyroxenite clasts with similar properties compared to monomict diogenites. We used statistical methods and variation plots of major and minor elements in orthopyroxene and chromite to show whether or not howardite orthopyroxenites are related to monomict diogenites, and to assess their petrogenesis. Our results fail to establish any evidence that monomict diogenites are significantly different from howardite orthopyroxenites in terms of major and minor elements. We also found no differences between Antarctic diogenites and non-Antarctic diogenites. Although element variation plots show compelling evidence that most diogenites originated by igneous fractionation, linear trends among the various diogenites and howardite orthopyroxenite clasts are either non-existent or ill-defined. This militates against an origin from a single magma body, but suggests an origin from multiple magma bodies in the parent planetoid. Other/Unknown Material Antarc* Antarctic NASA Technical Reports Server (NTRS) Antarctic |
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NASA Technical Reports Server (NTRS) |
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91 |
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91 Berkley, John L. Boynton, Nancy J. Minor/major element variation within and among diogenite and howardite orthopyroxenite groups |
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91 |
description |
Diogenites are orthopyroxenites that may contain chromite and olivine as accessory minerals. Howardite breccias contain orthopyroxenite clasts with similar properties compared to monomict diogenites. We used statistical methods and variation plots of major and minor elements in orthopyroxene and chromite to show whether or not howardite orthopyroxenites are related to monomict diogenites, and to assess their petrogenesis. Our results fail to establish any evidence that monomict diogenites are significantly different from howardite orthopyroxenites in terms of major and minor elements. We also found no differences between Antarctic diogenites and non-Antarctic diogenites. Although element variation plots show compelling evidence that most diogenites originated by igneous fractionation, linear trends among the various diogenites and howardite orthopyroxenite clasts are either non-existent or ill-defined. This militates against an origin from a single magma body, but suggests an origin from multiple magma bodies in the parent planetoid. |
format |
Other/Unknown Material |
author |
Berkley, John L. Boynton, Nancy J. |
author_facet |
Berkley, John L. Boynton, Nancy J. |
author_sort |
Berkley, John L. |
title |
Minor/major element variation within and among diogenite and howardite orthopyroxenite groups |
title_short |
Minor/major element variation within and among diogenite and howardite orthopyroxenite groups |
title_full |
Minor/major element variation within and among diogenite and howardite orthopyroxenite groups |
title_fullStr |
Minor/major element variation within and among diogenite and howardite orthopyroxenite groups |
title_full_unstemmed |
Minor/major element variation within and among diogenite and howardite orthopyroxenite groups |
title_sort |
minor/major element variation within and among diogenite and howardite orthopyroxenite groups |
publishDate |
1992 |
url |
http://ntrs.nasa.gov/search.jsp?R=19930029966 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19930029966 Accession ID: 93A13963 |
op_rights |
Copyright |
_version_ |
1766275354186481664 |