Antarctic iron meteorites: An unexpectedly high proportion of falls of unusual interest
The inhabited and explored areas of Earth have contributed 725 iron meteorites, accounting for 28% of the 2611 authenticated meteorites known of all types. Observed fall statistics give a much different view of relative abundance. The 42 historic iron meteorite falls spanning 230 years suggests a fr...
Main Author: | |
---|---|
Format: | Other/Unknown Material |
Language: | unknown |
Published: |
1986
|
Subjects: | |
Online Access: | http://hdl.handle.net/2060/19860019342 |
id |
ftnasantrs:oai:casi.ntrs.nasa.gov:19860019342 |
---|---|
record_format |
openpolar |
spelling |
ftnasantrs:oai:casi.ntrs.nasa.gov:19860019342 2023-05-15T13:53:27+02:00 Antarctic iron meteorites: An unexpectedly high proportion of falls of unusual interest Clarke, R. S., Jr. Unclassified, Unlimited, Publicly available JAN 1, 1986 application/pdf http://hdl.handle.net/2060/19860019342 unknown Document ID: 19860019342 Accession ID: 86N28814 http://hdl.handle.net/2060/19860019342 No Copyright CASI ASTROPHYSICS Lunar and Planetary Inst. International Workshop on Antarctic Meteorites; p 28-29 1986 ftnasantrs 2016-06-11T22:52:12Z The inhabited and explored areas of Earth have contributed 725 iron meteorites, accounting for 28% of the 2611 authenticated meteorites known of all types. Observed fall statistics give a much different view of relative abundance. The 42 historic iron meteorite falls spanning 230 years suggests a frequency of one fall per 5.6 years and represents only 4.9% of the total 853 known falls. Antarctic iron meteorite recoveries offer promise of providing a new perspective on the influx problem. At least 42 iron meteorite specimens were found during the last 25 years by various field teams working in Antarctica. Most of these specimens were not described in detail, but the available data indicates that 21 separate falls are represented, 50% of the number of recovered specimens. Twelve of the 21 falls were both structurally classified and placed into chemical groups. They are listed in order of increasing structural complexity and/or Ni content. 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 |
ASTROPHYSICS |
spellingShingle |
ASTROPHYSICS Clarke, R. S., Jr. Antarctic iron meteorites: An unexpectedly high proportion of falls of unusual interest |
topic_facet |
ASTROPHYSICS |
description |
The inhabited and explored areas of Earth have contributed 725 iron meteorites, accounting for 28% of the 2611 authenticated meteorites known of all types. Observed fall statistics give a much different view of relative abundance. The 42 historic iron meteorite falls spanning 230 years suggests a frequency of one fall per 5.6 years and represents only 4.9% of the total 853 known falls. Antarctic iron meteorite recoveries offer promise of providing a new perspective on the influx problem. At least 42 iron meteorite specimens were found during the last 25 years by various field teams working in Antarctica. Most of these specimens were not described in detail, but the available data indicates that 21 separate falls are represented, 50% of the number of recovered specimens. Twelve of the 21 falls were both structurally classified and placed into chemical groups. They are listed in order of increasing structural complexity and/or Ni content. |
format |
Other/Unknown Material |
author |
Clarke, R. S., Jr. |
author_facet |
Clarke, R. S., Jr. |
author_sort |
Clarke, R. S., Jr. |
title |
Antarctic iron meteorites: An unexpectedly high proportion of falls of unusual interest |
title_short |
Antarctic iron meteorites: An unexpectedly high proportion of falls of unusual interest |
title_full |
Antarctic iron meteorites: An unexpectedly high proportion of falls of unusual interest |
title_fullStr |
Antarctic iron meteorites: An unexpectedly high proportion of falls of unusual interest |
title_full_unstemmed |
Antarctic iron meteorites: An unexpectedly high proportion of falls of unusual interest |
title_sort |
antarctic iron meteorites: an unexpectedly high proportion of falls of unusual interest |
publishDate |
1986 |
url |
http://hdl.handle.net/2060/19860019342 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_source |
CASI |
op_relation |
Document ID: 19860019342 Accession ID: 86N28814 http://hdl.handle.net/2060/19860019342 |
op_rights |
No Copyright |
_version_ |
1766258552102453248 |