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Allan Hills A81030
Basic information Name: Allan Hills A81030
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA81030
This meteorite may also be called Allan Hills 81030 (ALH 81030) in publications.

Observed fall: No
Year found: 1981
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 1852 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 6(1)  (1983)  LL3
AMN 7(1)  (1984)  L3
Meteoritical Bulletin:  MB 76  (1994)  L3.4
NHM Catalogue:  5th Edition  (2000)  L3.4
MetBase:  v. 7.1  (2006)  L3.4
Recommended:  L3.4    [explanation]

This is 1 of 52 approved meteorites classified as L3.4.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Writeuphelp
Writeup from AMN 6(1):

Sample No.: ALHA81030

Location: Allan Hills

Field No.: 1685

Weight (gms): 1851.6

Meteorite Type: LL3 Chondrite

 

Physical Description: Roberta Score

This angular stone is covered with patchy black fusion crust. Several large fractures penetrate the interior. A few inclusions are visible on the exterior. The bottom contains squall-like marks. Chipping exposed an interior of dark gray matrix material with small inclusions visible. Dimensions: 18 x 7.5 x 9 cm.

 

Petrographic Description: Brian Mason

This specimen closely resembles ALHA81025 in texture, range of mineral compositions, and degree of weathering. It is therefore classified as an LL3 chondrite and tentatively paired with that meteorite.

Data from:
  MB76
  Table 2
  Line 553:
Origin or pseudonym:Main icefield
Mass (g):1851.6
Class:L3.4
Weathering grade:B/C
Fayalite (mol%):1-49
Ferrosilite (mol%):5-33
Comments:26Al=53±3; 77011 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° 42' 5"S, 159° 23' 19"E)
Note: the NHM and MetBase coordinates are 7.3 km apart

Statistics:
     This is 1 of 44274 approved meteorites from Antarctica (plus 3802 unapproved names)
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