Meteoritical Bulletin: Entry for Allan Hills A81048

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Allan Hills A81048

Basic information

Name: Allan Hills A81048
This is an OFFICIAL meteorite name.
Abbreviation: ALHA81048
This meteorite may also be called Allan Hills 81048 (ALH 81048) in publications.
Observed fall: No
Year found: 1981
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 190.6 g

Classification
history:

Antarctic Meteorite Newsletter:	AMN 6(1)	(1983)	H4
Meteoritical Bulletin:	MB 76	(1994)	H4
NHM Catalogue:	5th Edition	(2000)	H4
MetBase:	v. 7.1	(2006)	H4
Recommended:			H4 [explanation]

This is 1 of 6493 approved meteorites (plus 2 unapproved names) classified as H4. [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)

Writeup

Writeup from AMN 6(1):

Sample No.: ALHA81048

Location: Allan Hills

Field No.: 1121

Weight (gms): 190.6

Meteorite Type: H4 Chondrite

Physical Description: Carol Schwarz

This specimen has no fusion crust except for a small amount of remnant crust on one face. It is extremely weathered and fractured. Chipping exposed a thick weathering rind and only small areas of less weathered material. Dimensions: 8.5 x 4.5 x 3 cm.

Petrographic Description: Brian Mason

This section is essentially identical with that of ALHA81044 in texture, mineral compositions, and degree of weathering. It is classified as an H4 chondrite and tentatively paired with that meteorite.

Data from:
  MB76
  Table 2
  Line 571:

Origin or pseudonym:	Near Western
Mass (g):	190.6
Class:	H4
Weathering grade:	B/C
Fayalite (mol%):	18
Ferrosilite (mol%):	16
Comments:	26Al=58±3; 81041 pairing group

Catalogs:

Search for specimens in the Smithsonian Institution collection (U.S.):	Require SI photo
Search for this meteorite in the NASA/JSC database (U.S.):

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° 43' 17"S, 158° 45' 44"E)

Note: the NHM and MetBase coordinates are 23.2 km apart

Statistics:
This is 1 of 44547 approved meteorites from Antarctica (plus 3802 unapproved names)

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