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Allan Hills 94007
Basic information Name: Allan Hills 94007
     This is an OFFICIAL meteorite name.
Abbreviation: ALH 94007
Observed fall: No
Year found: 1994
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 1.2 g
Antarctic Meteorite Newsletter:  AMN 19(2)  (1996)  L3.4
Meteoritical Bulletin:  MB 82  (1998)  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)
Writeup from AMN 19(2):
Sample No.: ALH94007
Location:Allan Hills
Dimensions (cm):1.5 x 1.0 x 0.75
Weight (g):1.24
Meteorite Type:L3 Chondrite (estimated L3.4)

Macroscopic Description: Kathleen McBride

The exterior surface of this meteorite is weathered brown with thin patches of fusion crust. Fractures penetrate the surface. The interior is brown with heavy oxidation and some metal visible.

Thin Section (,2) Description: Brian Mason

The section shows numerous chondrules (up to 1.8 mm across), chondrule fragments, and mineral grains in a black matrix that contains a small amount of nickel-iron and troilite. The meteorite is considerably weathered, with limonitic staining and patches of brown limonite throughout the section. Microprobe analyses show olivine and pyroxene of variable composition: olivine, Fa7-38, mean Fa17: pyroxene, Fa1-21. The meteorite is classified as an L3 chondrite (estimated L3.4).

Data from:
  Table A1
  Line 7:
Origin or pseudonym:Main icefield
Mass (g):1.2
Weathering grade:C
Fayalite (mol%):7-38
Ferrosilite (mol%):1-21
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References: Published in Antarctic Meteorite Newsletter 19(2) (1996), JSC, Houston
Published in Meteoritical Bulletin, no. 82, MAPS 33, A221-A240 (1998)
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     Catalogue of Meteorites:   (76° 43'S, 159° 40'E)
     Recommended::   (76° 43'S, 159° 40'E)

     This is 1 of 44248 approved meteorites from Antarctica (plus 3802 unapproved names)
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