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Allan Hills A79015
Basic information Name: Allan Hills A79015
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA79015
This meteorite may also be called Allan Hills 79015 (ALH 79015) in publications.

Observed fall: No
Year found: 1979
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 64 g
Antarctic Meteorite Newsletter:  AMN 4(1)  (1981)  H5
Meteoritical Bulletin:  MB 76  (1994)  H5
NHM Catalogue:  5th Edition  (2000)  H5
MetBase:  v. 7.1  (2006)  H5
Recommended:  H5    [explanation]

This is 1 of 10950 approved meteorites (plus 20 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 from AMN 4(1):

Sample No.: ALHA79015

Location: Allan Hills

Field No.: 1169

Weight (gms): 64.0

Meteorite Type: H5 Chondrite


Physical Description: Roberta Score

Sample was in two pieces when it was received in the lab. When put together, the stone has a tabular shape with the top surface being rounded and the bottom flat. Most of the stone is covered with a dull porous-looking black fusion crust The interior material has a 1-2 mm weathering rind. The general color of the interior is light gray with reddish-brown oxidation scattered throughout. Darker gray clasts are visible. Dimensions: 4.5 x 2.5 x 2 cm.


Petrographic Description: Brian Mason

Chondrules are prominent, ranging from 0.6-1.2 mm across. They are set in a granular matrix consisting largely of olivine and pyroxene, with minor amounts of nickel-iron and troilite. The section is partly rimmed with fusion crust. Some limonitic staining is present, mainly in association with nickel-iron grains Microprobe analyses gave the following mineral compositions: olivine, Fa17; pyroxene, Fs15. The meteorite is classified as an H5 chondrite.

Data from:
  Table 2
  Line 453:
Origin or pseudonym:Main icefield
Mass (g):64
Weathering grade:B
Fayalite (mol%):17
Ferrosilite (mol%):15
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References: Published in Antarctic Meteorite Newsletter 4(1) (1981), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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     Catalogue of Meteorites:   (76° 43'S, 159° 40'E)
     Recommended::   (76° 42' 19"S, 159° 19' 37"E)
Note: the NHM and MetBase coordinates are 8.8 km apart

     This is 1 of 43699 approved meteorites from Antarctica (plus 3802 unapproved names)
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