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| Allan Hills 83101 | |||||||||||||||||||||
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| Basic information | Name: Allan Hills 83101 This is an OFFICIAL meteorite name. Abbreviation: ALH 83101 Observed fall: No Year found: 1983 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  639 g | ||||||||||||||||||||
| Classification history: |
This is 1 of 12401 approved meteorites (plus 8 unapproved names) classified as L6. [show all] Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||
| Writeup |
Writeup from AMN 8(1):
Sample No.: ALH83101 Location: Allan Hills Weight (g): 639.2 Field No.: 1471 Dimensions (cm): 9 x 8 x 5.5 Meteorite Type: L6 Chondrite
Macroscopic Description: Carol Schwarz This smooth rounded specimen is covered with black, polygonally fractured fusion crust. One surface is flat and iridescent. There are several areas where fusion crust has weathered away revealing a rough reddish surface with areas of gray matrix visible. The interior is light gray and lightly dotted with oxidation. Metal flecks are numerous. The fusion crust is thick and tends to spall off.
Thin Section (,4) Description: Glenn MacPherson Light limonitic stain is present locally, suggesting mild weathering. Chondrules up to 1.5 mm diameter are weakly preserved. A well developed polygonal-granular texture is present locally in the matrix, but the grain size is variable. Plagioclase (An12;Ab84;Or4) is abundant and coarse. Pyroxene (Fs23) is mostly orthorhombic. Olivine is uniformly Fa25. Metal (mostly one-phase) and troilite are subequal in amount. This meteorite is an L6 chondrite. | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 959: |
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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:
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Statistics: This is 1 of 43857 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
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