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Allan Hills A79016
Basic information Name: Allan Hills A79016
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA79016
This meteorite may also be called Allan Hills 79016 (ALH 79016) in publications.

Observed fall: No
Year found: 1979
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 1146 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.: ALHA79016

Location: Allan Hills

Field No.: 1057

Weight (gms): 1146.0

Meteorite Type: H6 Chondrite

 

Physical Description: Carol Schwarz

Sample is mostly covered with black fusion crust including two surfaces that once were fracture surfaces. Shallow regmaglypts exist on several faces. Several cracks penetrate the interior. Chipping revealed a 1 to 3 cm thick dark reddish brown weathering rind. The rest of the interior material is not as severely weathered as the weathering rind, it has a yellowish color and is quite friable. Metal flecks are visible. Dimensions: 13 x 8 x 6.5 cm.

 

Petrographic Description: Brian Mason

Chondrules are sparse and poorly defined, tending to merge with the granular groundmass, which consists mainly of olivine and pyroxene, with minor amounts of nickel-iron, sodic plagioclase, and troilite, and accessory chromite. A vein of nickel-iron up to 0.5 mm thick traverses the section. Microprobe analyses show olivine (Fa17), orthopyroxene (Fs15), and plagioclase (An13) of uniform composition; accessory merrillite was identified with the microprobe. The meteorite is classified as an H6 chondrite.

Data from:
  MB76
  Table 2
  Line 454:
Origin or pseudonym:Main icefield
Mass (g):1146
Class:H6
Weathering grade:B/C
Fayalite (mol%):17
Ferrosilite (mol%):15
Comments:26Al=50±3
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° 43'S, 159° 40'E)

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