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Allan Hills A79019
Basic information Name: Allan Hills A79019
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA79019
This meteorite may also be called Allan Hills 79019 (ALH 79019) in publications.

Observed fall: No
Year found: 1979
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 12.1 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 4(1)  (1981)  H6
Meteoritical Bulletin:  MB 76  (1994)  H6
NHM Catalogue:  5th Edition  (2000)  H6
MetBase:  v. 7.1  (2006)  H6
Recommended:  H6    [explanation]

This is 1 of 5857 approved meteorites (plus 5 unapproved names) classified as H6.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Writeuphelp
Writeup from AMN 4(1):

Sample No.: ALHA79019

Location: Allan Hills

Field No.: 1193

Weight (gms): 12.1

Meteorite Type: H6 Chondrite

 

Physical Description: Roberta Score

Brownish-black fusion crust covers three surfaces of this angular stone. The other three surfaces are fractured surfaces. Only one of these surfaces is relatively unweathered with inclusions visible in the gray colored matrix. Chipping revealed a weathering rind from <1 mm to 3 mm thick. The interior material is light gray in color with obvious metal. Dimensions: 2 x 2 x 1.5 cm.

 

Petrographic Description: Brian Mason

Chondrules are sparse and poorly developed, tending to merge with the granular groundmass, which consists largely of olivine and pyroxene, with minor amounts of plagioclase, nickel-iron, and troilite. A minor amount of limonitic staining is present in association with the nickel-iron grains. Microprobe analyses gave the following compositions: olivine, Fa17; pyroxene, Fs15; plagioclase, An12. The meteorite is classified as an H6 chondrite.

Data from:
  MB76
  Table 2
  Line 457:
Origin or pseudonym:Main icefield
Mass (g):12.1
Class:H6
Weathering grade:B
Fayalite (mol%):17
Ferrosilite (mol%):15
Catalogs:
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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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Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (76° 43'S, 159° 40'E)
     Recommended::   (76° 41' 23"S, 159° 21' 48"E)
Note: the NHM and MetBase coordinates are 8.4 km apart

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