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Allan Hills 83010
Basic information Name: Allan Hills 83010
     This is an OFFICIAL meteorite name.
Abbreviation: ALH 83010
Observed fall: No
Year found: 1983
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 395 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 8(1)  (1985)  L3
Meteoritical Bulletin:  MB 76  (1994)  L3.3
NHM Catalogue:  5th Edition  (2000)  L3.3
MetBase:  v. 7.1  (2006)  LL3.3
Antarctic Meteorite Newsletter:  AMN 33(1)  (2010)  LL3.3
Recommended:  LL3.3    [explanation]

This is 1 of 15 approved meteorites classified as LL3.3.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Writeuphelp
Writeup from AMN 8(1):

Sample No.: ALH83010

Location: Allan Hills

Weight (g): 395.2

Field No.: 2144

Dimensions (cm): 10.5 x 8 x 2

Meteorite Type: L3 Chondrite

 

Macroscopic Description: Carol Schwarz

Black to iridescent fusion crust occurs on one side of this meteorite fragment. The other surfaces are dark greenish gray with areas of iridescent reddish brown. Numerous chondrules (1-4 mm in diameter) as well as large clasts (the largest is 1.0 x 0.5 cm) are visible on the fracture surface. This sample is extremely coherent. The interior exposed consists of a dark matrix with numerous 1-mm-sized chondrules, gray to yellowish in color. Metal is present.

 

Thin Section (,3) Description: Glenn MacPherson

Pervasive light limonitic staining suggests moderate weathering. Chondrules up to 2.5 mm diameter are sharply defined, and many contain clear brown isotropic glass. Pyroxene is mostly monoclinic and was found in the range Fs2 to Fs28. Olivine was found in the range Fa4 to Fa31. Metal is subequal with (or slightly less than) troilite in abundance. There are well defined sulfide rims around many chondrules. Two metal phases are present. Chromite is accessory but is generally very fine grained. This meteorite is probably an L3 chondrite.

Data from:
  MB76
  Table 2
  Line 893:
Origin or pseudonym:Middle Western
Mass (g):395.2
Class:L3.3
Weathering grade:B
Fayalite (mol%):4-31
Ferrosilite (mol%):2-28
Comments:26Al=50±2
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° 46' 12"S, 158° 8' 26"E)
Note: the NHM and MetBase coordinates are 39.5 km apart

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