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Allan Hills A81007
Basic information Name: Allan Hills A81007
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA81007
This meteorite may also be called Allan Hills 81007 (ALH 81007) in publications.

Observed fall: No
Year found: 1981
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 163.5 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 6(1)  (1983)  Eucrite-pmict
Meteoritical Bulletin:  MB 76  (1994)  Eucrite-pmict
NHM Catalogue:  5th Edition  (2000)  Eucrite-pmict
MetBase:  v. 7.1  (2006)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 339 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Writeuphelp
Writeup from AMN 6(1):

Sample No.: ALHA81007

Location: Allan Hills

Field No.: 1553

Weight (gms): 163.5

Meteorite Type: Polymict Eucrite

 

Physical Description: Roberta Score

This achondrite looks typical of the Allan Hills polymict eucrites. These include ALHA76005, A77302, A78040, A78132, A78156, A78165, A80102, A81006, A81007, A81008, A81010. Dimensions: 8.5 x 6 x 2.5 cm.

 

Petrographic Description: Brian Mason

This specimen is very similar to ALHA81006 in texture and in mineral compositions, and may be tentatively paired with that meteorite. Microprobe analyses show a comparable range in mineral compositions: pyroxene, Wo3-28, En31-52, Fs38-55; plagioclase, An74-93, mean An88. The meteorite is classified as a polymict eucrite.

Data from:
  MB76
  Table 2
  Line 530:
Origin or pseudonym:Main icefield
Mass (g):163.5
Class:Eu "pm"
Weathering grade:A/B
Ferrosilite (mol%):38-55
Comments:76005 pairing group
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 6(1) (1983), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (76° 43'S, 159° 40'E)
     Recommended::   (76° 41' 23"S, 159° 14' 57"E)
Note: the NHM and MetBase coordinates are 11.1 km apart

Statistics:
     This is 1 of 38940 approved meteorites from Antarctica (plus 5051 unapproved names)
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