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| Allan Hills 84191 | |||||||||||||||||||||||||
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| Basic information | Name: Allan Hills 84191 This is an OFFICIAL meteorite name. Abbreviation: ALH 84191 Observed fall: No Year found: 1984 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  14 g | ||||||||||||||||||||||||
| Classification history: |
This is 1 of 636 approved meteorites classified as CM2. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites | ||||||||||||||||||||||||
| Writeup |
Writeup from AMN 9(3):
Sample No.: ALH84191 Location: Allan Hills Weight (g): 14.0 Field No.: 1451 Dimensions (cm): 3 x 2.5 x 1 Meteorite Type: C2 Chondrite
Macroscopic Description: Roberta Score A fractured, blistered, black fusion crust entirely covers ALH84191. Chipping revealed an interior that is black with many rounded and irregular shaped inclusions. Oxidation is minor.
Thin Section (,2) Description: Brian Mason The section shows scattered chondrules (up to 0.6 mm across), irregular aggregates, and mineral grains in a black matrix which contains dispersed metal and sulfide grains. There is little or no evidence of terrestrial weathering. Microprobe analyses show olivine as nearly pure Mg2SiO4 (FeO 0.4-1.3%) and pyroxene with somewhat greater variation (FeO 0.6-4.51; CaO 0.4-2.2%). The meteorite is a C2 chondrite, and closely resembles ALH84033 and other meteorites paired with it. | ||||||||||||||||||||||||
| Data from: MB76 Table 2 Line 1156: |
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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:
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Statistics: This is 1 of 44543 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||||||
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| Revision history: |
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