Meteoritical Bulletin: Entry for Allan Hills A81008

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Allan Hills A81008

Basic information

Name: Allan Hills A81008
This is an OFFICIAL meteorite name.
Abbreviation: ALHA81008
This meteorite may also be called Allan Hills 81008 (ALH 81008) in publications.
Observed fall: No
Year found: 1981
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 43.8 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 408 approved meteorites classified as Eucrite-pmict. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Writeup

Writeup from AMN 6(1):

Sample No.: ALHA81008

Location: Allan Hills

Field No.: 1270

Weight (gms): 43.8

Meteorite Type: Polymict Eucrite

Physical Description: Roberta Score

ALHA81008 is typical of the Allan Hills polymict eucrites. Dimensions: 5 x 3.5 x 3 cm.

Petrographic Description: Brian Mason

This specimen is very similar to ALHA81006 and 81007 in texture and in mineral compositions, and can be tentatively paired with those meteorites. Microprobe analyses show a comparable range in mineral compositions: pyroxene, Wo_2-20, En_35-61, Fs_32-59; plagioclase An_80-93, mean An₈₇. The meteorite is classified as a polymict eucrite.

Data from:
  MB76
  Table 2
  Line 531:

Origin or pseudonym:	Main icefield
Mass (g):	43.8
Class:	Eu "pm"
Weathering grade:	A/B
Ferrosilite (mol%):	32-59
Comments:	76005 pairing group

Catalogs:

Search for specimens in the Smithsonian Institution collection (U.S.):	Require SI photo
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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' 40"S, 159° 23' 28"E)

Note: the NHM and MetBase coordinates are 7.5 km apart

Statistics:
This is 1 of 44543 approved meteorites from Antarctica (plus 3802 unapproved names)

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