A collection of diverse micrometeorites recovered from 100 tonnes of Antarctic blue ice
A new type of meteoritic material, intermediate in size between meteorites and interplanetary dust particles (IDPs), is described. Melting and filtering of about 100 tons of blue ice near Cap Prudhomme, Antarctica, yielded 7500 or more irregular, friable particles and about 1500 melted spherules, ab...
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| Format: | Other/Unknown Material |
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1991
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| Online Access: | http://ntrs.nasa.gov/search.jsp?R=19910053898 |
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ftnasantrs:oai:casi.ntrs.nasa.gov:19910053898 |
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ftnasantrs:oai:casi.ntrs.nasa.gov:19910053898 2023-05-15T13:53:23+02:00 A collection of diverse micrometeorites recovered from 100 tonnes of Antarctic blue ice Maurette, M. Olinger, C. Michel-Levy, M. C. Kurat, G. Pourchet, M. Unclassified, Unlimited, Publicly available May 2, 1991 http://ntrs.nasa.gov/search.jsp?R=19910053898 unknown http://ntrs.nasa.gov/search.jsp?R=19910053898 Accession ID: 91A38521 Copyright Other Sources 91 Nature; 351; 44-47 1991 ftnasantrs 2012-02-15T19:02:09Z A new type of meteoritic material, intermediate in size between meteorites and interplanetary dust particles (IDPs), is described. Melting and filtering of about 100 tons of blue ice near Cap Prudhomme, Antarctica, yielded 7500 or more irregular, friable particles and about 1500 melted spherules, about 100 microns in size, both showing a 'chondritic' composition suggestive of an extraterrestrial origin. Analyzed irregular particles appear to be unmelted and have similarities with the fine-grained matrix of primitive carbonaceous chondrites, but are extremely diverse in composition. Isotopic analysis of trapped neon confirms an extraterrestrial origin for 16 of 47 irregular particles and 2 of 19 spherules studied and strongly suggests that they were exposed in space as micrometeoroids. These large Antarctic micrometeorites constitute a new family, or at least a new population, of solar system objects, in a mass range corresponding to the bulk of extraterrestrial material accreted by the earth today. Other/Unknown Material Antarc* Antarctic Antarctica NASA Technical Reports Server (NTRS) Antarctic |
| institution |
Open Polar |
| collection |
NASA Technical Reports Server (NTRS) |
| op_collection_id |
ftnasantrs |
| language |
unknown |
| topic |
91 |
| spellingShingle |
91 Maurette, M. Olinger, C. Michel-Levy, M. C. Kurat, G. Pourchet, M. A collection of diverse micrometeorites recovered from 100 tonnes of Antarctic blue ice |
| topic_facet |
91 |
| description |
A new type of meteoritic material, intermediate in size between meteorites and interplanetary dust particles (IDPs), is described. Melting and filtering of about 100 tons of blue ice near Cap Prudhomme, Antarctica, yielded 7500 or more irregular, friable particles and about 1500 melted spherules, about 100 microns in size, both showing a 'chondritic' composition suggestive of an extraterrestrial origin. Analyzed irregular particles appear to be unmelted and have similarities with the fine-grained matrix of primitive carbonaceous chondrites, but are extremely diverse in composition. Isotopic analysis of trapped neon confirms an extraterrestrial origin for 16 of 47 irregular particles and 2 of 19 spherules studied and strongly suggests that they were exposed in space as micrometeoroids. These large Antarctic micrometeorites constitute a new family, or at least a new population, of solar system objects, in a mass range corresponding to the bulk of extraterrestrial material accreted by the earth today. |
| format |
Other/Unknown Material |
| author |
Maurette, M. Olinger, C. Michel-Levy, M. C. Kurat, G. Pourchet, M. |
| author_facet |
Maurette, M. Olinger, C. Michel-Levy, M. C. Kurat, G. Pourchet, M. |
| author_sort |
Maurette, M. |
| title |
A collection of diverse micrometeorites recovered from 100 tonnes of Antarctic blue ice |
| title_short |
A collection of diverse micrometeorites recovered from 100 tonnes of Antarctic blue ice |
| title_full |
A collection of diverse micrometeorites recovered from 100 tonnes of Antarctic blue ice |
| title_fullStr |
A collection of diverse micrometeorites recovered from 100 tonnes of Antarctic blue ice |
| title_full_unstemmed |
A collection of diverse micrometeorites recovered from 100 tonnes of Antarctic blue ice |
| title_sort |
collection of diverse micrometeorites recovered from 100 tonnes of antarctic blue ice |
| publishDate |
1991 |
| url |
http://ntrs.nasa.gov/search.jsp?R=19910053898 |
| op_coverage |
Unclassified, Unlimited, Publicly available |
| geographic |
Antarctic |
| geographic_facet |
Antarctic |
| genre |
Antarc* Antarctic Antarctica |
| genre_facet |
Antarc* Antarctic Antarctica |
| op_source |
Other Sources |
| op_relation |
http://ntrs.nasa.gov/search.jsp?R=19910053898 Accession ID: 91A38521 |
| op_rights |
Copyright |
| _version_ |
1766258433371144192 |