|
Allan Hills A81100 | |||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Allan Hills A81100 This is an OFFICIAL meteorite name. Abbreviation: ALHA81100 This meteorite may also be called Allan Hills 81100 (ALH 81100) in publications. Observed fall: No Year found: 1981 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass: 154.6 g | ||||||||||||||||||||
Classification history: |
This is 1 of 11505 approved meteorites (plus 23 unapproved names) classified as H5. [show all] Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||
Writeup |
Writeup from AMN 6(2):
Sample No.: ALHA81100 Location: Allan Hills Field No.: 1484 Weight (gms): 154.6 Meteorite Type: H5 Chondrite
Physical Description: Carol Schwarz This specimen has black fusion crust on all but two sides. It is polygonally fractured and somewhat weathered. The other surfaces are dark reddish brown but show distinct chondrules and gray clasts. The interior is gray with oxidation haloes and a 1-2 mm weathering rind. Dimensions: 5 x 4.8 x 4.8 cm
Petrographic Description: Brian Mason Chondrules are fairly abundant but their margins are diffuse, tending to merge with the granular groundmass, which consists largely of olivine and pyroxene with minor amounts of nickel-iron and troilite. Weathering is moderate, being limited to brown limonitic staining around metal grains. Microprobe analyses gave the following compositions: olivine, Fa19; orthopyroxene, Fs17. The meteorite is classified as an H5 chondrite. | ||||||||||||||||||||
Data from: MB76 Table 2 Line 623: |
|
||||||||||||||||||||
Catalogs: |
| ||||||||||||||||||||
References: | Published in Antarctic Meteorite Newsletter 6(2) (1983), JSC, Houston Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
| ||||||||||||||||||||
Geography: |
Statistics: This is 1 of 44400 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
Proximity search: | |||||||||||||||||||||
Also see: |
This lists the most popular meteorites among people who looked up this meteorite.
| ||||||||||||||||||||
Revision history: |
This lists important revisions made to data for this record.
|