Mineralogical aspects of terrestrial weathering effects in chondrites from Allan Hills, Antarctica

The work reported here represents a first attempt at comparing the mineralogical aspects of weathering effects in selected Antarctic chondrites with those present in a petrologically similar chondrite which was weathered in the Arizona desert. The methods of analysis employed include X-ray diffracto...

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Bibliographic Details
Main Author: Gooding, J. L.
Format: Other/Unknown Material
Language:unknown
Published: 1982
Subjects:
91
Antarctic
Allan Hills
Antarc*
Antarctica
Online Access:http://ntrs.nasa.gov/search.jsp?R=19820048214
id ftnasantrs:oai:casi.ntrs.nasa.gov:19820048214
record_format openpolar
spelling ftnasantrs:oai:casi.ntrs.nasa.gov:19820048214 2023-05-15T13:46:48+02:00 Mineralogical aspects of terrestrial weathering effects in chondrites from Allan Hills, Antarctica Gooding, J. L. Unclassified, Unlimited, Publicly available JAN 1, 1982 http://ntrs.nasa.gov/search.jsp?R=19820048214 unknown http://ntrs.nasa.gov/search.jsp?R=19820048214 Accession ID: 82A31749 Copyright Other Sources 91 Lunar and Planetary Science Conference; March 16-20, 1981; Houston, TX 1982 ftnasantrs 2012-02-15T15:04:32Z The work reported here represents a first attempt at comparing the mineralogical aspects of weathering effects in selected Antarctic chondrites with those present in a petrologically similar chondrite which was weathered in the Arizona desert. The methods of analysis employed include X-ray diffractometry, differential thermal analysis, and reflectance spectrophotometry. It is found that the dominant weathering products in the rocks are complex, multiple-phase, hydrous ferric oxides which formed by alteration of Ni-Fe metal and sulfide particles under the influence of liquid water. The Fe-oxide weathering products may comprise approximately 15-20 wt % of the most intensely weathered samples although the same samples contain not more than 5% goethite as the only well-crystallized hydrous ferric oxide. Other/Unknown Material Antarc* Antarctic Antarctica NASA Technical Reports Server (NTRS) Antarctic Allan Hills ENVELOPE(159.667,159.667,-76.717,-76.717)
institution Open Polar
collection NASA Technical Reports Server (NTRS)
op_collection_id ftnasantrs
language unknown
topic 91
spellingShingle 91
Gooding, J. L.
Mineralogical aspects of terrestrial weathering effects in chondrites from Allan Hills, Antarctica
topic_facet 91
description The work reported here represents a first attempt at comparing the mineralogical aspects of weathering effects in selected Antarctic chondrites with those present in a petrologically similar chondrite which was weathered in the Arizona desert. The methods of analysis employed include X-ray diffractometry, differential thermal analysis, and reflectance spectrophotometry. It is found that the dominant weathering products in the rocks are complex, multiple-phase, hydrous ferric oxides which formed by alteration of Ni-Fe metal and sulfide particles under the influence of liquid water. The Fe-oxide weathering products may comprise approximately 15-20 wt % of the most intensely weathered samples although the same samples contain not more than 5% goethite as the only well-crystallized hydrous ferric oxide.
format Other/Unknown Material
author Gooding, J. L.
author_facet Gooding, J. L.
author_sort Gooding, J. L.
title Mineralogical aspects of terrestrial weathering effects in chondrites from Allan Hills, Antarctica
title_short Mineralogical aspects of terrestrial weathering effects in chondrites from Allan Hills, Antarctica
title_full Mineralogical aspects of terrestrial weathering effects in chondrites from Allan Hills, Antarctica
title_fullStr Mineralogical aspects of terrestrial weathering effects in chondrites from Allan Hills, Antarctica
title_full_unstemmed Mineralogical aspects of terrestrial weathering effects in chondrites from Allan Hills, Antarctica
title_sort mineralogical aspects of terrestrial weathering effects in chondrites from allan hills, antarctica
publishDate 1982
url http://ntrs.nasa.gov/search.jsp?R=19820048214
op_coverage Unclassified, Unlimited, Publicly available
long_lat ENVELOPE(159.667,159.667,-76.717,-76.717)
geographic Antarctic
Allan Hills
geographic_facet Antarctic
Allan Hills
genre Antarc*
Antarctic
Antarctica
genre_facet Antarc*
Antarctic
Antarctica
op_source Other Sources
op_relation http://ntrs.nasa.gov/search.jsp?R=19820048214
Accession ID: 82A31749
op_rights Copyright
_version_ 1766245231604269056

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