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Allan Hills 84096
Basic information Name: Allan Hills 84096
     This is an OFFICIAL meteorite name.
Abbreviation: ALH 84096
Observed fall: No
Year found: 1984
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 294 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 9(3)  (1986)  C4
AMN 17(1)  (1994)  LL6
Meteoritical Bulletin:  MB 76  (1994)  LL6
NHM Catalogue:  5th Edition  (2000)  LL6
MetBase:  v. 7.1  (2006)  LL6(?)
Recommended:  LL6(?)    [explanation]

This is the only approved meteorite classified as LL6(?).
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Writeuphelp
Writeup from AMN 9(3):

Sample No.: ALH84096

Location: Allan Hills

Weight (g): 293.6

Field No.: 2515

Dimensions (cm): 10 x 5 x 4

Meteorite Type: C4 Chondrite

 

Macroscopic Description: Carol Schwarz

Thin fusion crust covers 70% of this specimen. Areas devoid of fusion crust are mostly weathered and have a rough texture. Fresher areas are gray in color with some darker gray clasts, white clasts, and metal. The interior is medium gray and has several darker gray clasts. Chipping exposed a metal-rich area of several mm .

 

Thin Section (,4) Description: Brian Mason

The section has a brecciated appearance, with angular areas up to 5 mm across differing in color from pale gray to dark brown; however, the grain size is fairly uniform throughout. The meteorite appears to consist largely of fine-grained olivine (grain size 0.01-0.1 mm) with a small amount (2-3%) of nickel-iron and sulfide. Chondritic structure is barely perceptible. Microprobe analyses gave the following compositions: olivine, Fa30; pyroxene, Fs22; plagioclase, An10. The meteorite is tentatively classified as a C4 chondrite.

Data from:
  MB76
  Table 2
  Line 1061:
Origin or pseudonym:Middle Western
Mass (g):293.6
Class:LL6
Weathering grade:A/B
Fayalite (mol%):30
Ferrosilite (mol%):22
Comments:26Al=70±4
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 9(3) (1986), 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° 49' 49"S, 158° 19' 7"E)
Note: the NHM and MetBase coordinates are 36.7 km apart

Statistics:
     This is 1 of 39173 approved meteorites from Antarctica (plus 5051 unapproved names)
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