Mineralogical comparison of antarctic and non-antarctic HED (howardites-eucrites-diogenites) achondrites
Mineralogical examination of thin sections of non-Antarctic and Antarctic HED (howardite, eucrite, diogenite) achondrites indicates that they contain a variety of lithic components. Some of these components occur both as monomict meteorites and as clasts in polymict meteorites, whereas others occur...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19850065188 2023-05-15T13:49:36+02:00 Mineralogical comparison of antarctic and non-antarctic HED (howardites-eucrites-diogenites) achondrites Takeda, H. Mori, H. Delaney, J. S. Prinz, M. Harlow, G. E. Unclassified, Unlimited, Publicly available Dec 1, 1983 http://ntrs.nasa.gov/search.jsp?R=19850065188 unknown http://ntrs.nasa.gov/search.jsp?R=19850065188 Accession ID: 85A47339 Copyright Other Sources 91 National Institute of Polar Research, Memoirs, Special Issue; 30, D; 181-205 1983 ftnasantrs 2012-02-15T16:26:28Z Mineralogical examination of thin sections of non-Antarctic and Antarctic HED (howardite, eucrite, diogenite) achondrites indicates that they contain a variety of lithic components. Some of these components occur both as monomict meteorites and as clasts in polymict meteorites, whereas others occur only as clasts in some polymict breccias. The components may be classified by the degree of homogenization of the pyroxene present. In order of increasing homogeneity these are: (1) Y-75011-type basalt clasts; (2) Pasamonte; (3) Y-790266-type clasts; (4) Stannern and Nuevo Laredo; (5) Juvinas and Haraiya; and (6) Ibitira. Type 1 has been least modified by post-igneous thermal annealing, while types 5 and 6 were thoroughly metamorphosed. Three types of cumulate eucrites are recognized and are believed to represent (a) cumulates from thick lava flows or layered intrusions; (b) lunar highlands type crust; and (c) differentiation products of diogenitic magmas. 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 Takeda, H. Mori, H. Delaney, J. S. Prinz, M. Harlow, G. E. Mineralogical comparison of antarctic and non-antarctic HED (howardites-eucrites-diogenites) achondrites |
topic_facet |
91 |
description |
Mineralogical examination of thin sections of non-Antarctic and Antarctic HED (howardite, eucrite, diogenite) achondrites indicates that they contain a variety of lithic components. Some of these components occur both as monomict meteorites and as clasts in polymict meteorites, whereas others occur only as clasts in some polymict breccias. The components may be classified by the degree of homogenization of the pyroxene present. In order of increasing homogeneity these are: (1) Y-75011-type basalt clasts; (2) Pasamonte; (3) Y-790266-type clasts; (4) Stannern and Nuevo Laredo; (5) Juvinas and Haraiya; and (6) Ibitira. Type 1 has been least modified by post-igneous thermal annealing, while types 5 and 6 were thoroughly metamorphosed. Three types of cumulate eucrites are recognized and are believed to represent (a) cumulates from thick lava flows or layered intrusions; (b) lunar highlands type crust; and (c) differentiation products of diogenitic magmas. |
format |
Other/Unknown Material |
author |
Takeda, H. Mori, H. Delaney, J. S. Prinz, M. Harlow, G. E. |
author_facet |
Takeda, H. Mori, H. Delaney, J. S. Prinz, M. Harlow, G. E. |
author_sort |
Takeda, H. |
title |
Mineralogical comparison of antarctic and non-antarctic HED (howardites-eucrites-diogenites) achondrites |
title_short |
Mineralogical comparison of antarctic and non-antarctic HED (howardites-eucrites-diogenites) achondrites |
title_full |
Mineralogical comparison of antarctic and non-antarctic HED (howardites-eucrites-diogenites) achondrites |
title_fullStr |
Mineralogical comparison of antarctic and non-antarctic HED (howardites-eucrites-diogenites) achondrites |
title_full_unstemmed |
Mineralogical comparison of antarctic and non-antarctic HED (howardites-eucrites-diogenites) achondrites |
title_sort |
mineralogical comparison of antarctic and non-antarctic hed (howardites-eucrites-diogenites) achondrites |
publishDate |
1983 |
url |
http://ntrs.nasa.gov/search.jsp?R=19850065188 |
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=19850065188 Accession ID: 85A47339 |
op_rights |
Copyright |
_version_ |
1766251841047232512 |