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Allan Hills A81315
Basic information Name: Allan Hills A81315
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA81315
This meteorite may also be called Allan Hills 81315 (ALH 81315) in publications.

Observed fall: No
Year found: 1981
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 2.5 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 8(1)  (1985)  H?
AMN 13(1)  (1990)  H?/acapulco-like
AMN 17(1)  (1994)  Acapulco-like
Meteoritical Bulletin:  MB 76  (1994)  Acapulcoite
NHM Catalogue:  5th Edition  (2000)  Acapulcoite
MetBase:  v. 7.1  (2006)  Acapulcoite
Recommended:  Acapulcoite    [explanation]

This is 1 of 74 approved meteorites classified as Acapulcoite.   [show all]
Search for other: Acapulcoite-lodranite family, Acapulcoites, and Primitive achondrites
Writeuphelp
Writeup from AMN 8(1):

Sample No.: ALHA81315

Location: Allan Hills

Weight (g): 2.4

Field No.: 1674

Dimensions (cm): 1.5 x 1 x 1

Meteorite Type: H(?) Chondrite

 

Macroscopic Description: Roberta Score

Eighty percent of this meteorite is covered with fusion crust. Matrix is gray in color. It contains many darker colored submillimeter inclusions Metal is abundant. Oxidation is scattered evenly throughout the interior.

 

Thin Section (,1) Description: Brian Mason

ALHA81315 is a small specimen which has texture and mineral composition essentially identical to ALHA81261, classed as an H(?) meteorite, and is probably paired with it and ALHA77081.

Data from:
  MB76
  Table 2
  Line 836:
Origin or pseudonym:Main icefield
Mass (g):2.5
Class:Acap
Weathering grade:A/B
Fayalite (mol%):11
Ferrosilite (mol%):11
Comments:77081 pairing group
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 8(1) (1985), 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' 19"S, 159° 22' 8"E)
Note: the NHM and MetBase coordinates are 8.3 km apart

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