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Allan Hills A77014
Basic information Name: Allan Hills A77014
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA77014
This meteorite may also be called Allan Hills 77014 (ALH 77014) in publications.

Observed fall: No
Year found: 1977
Country: Antarctica [Collected jointly by ANSMET (US) and NIPR (Japan)]
Mass:help 309 g
Antarctic Meteorite Newsletter:  AMN 2(1)  (1979)  H5
Meteoritical Bulletin:  MB 76  (1994)  H5
NHM Catalogue:  5th Edition  (2000)  H5
NIPR Catalogue:  2000 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 2(1):
This text was reprinted from AMN 2(1) in AMN 4(1). In some cases, it may be an updated version from the original.

Sample No.: ALHA77014

Location: Allan Hills

Field No.: 77122931

Weight (gms): 308.8

Meteorite Type: H5 Chondrite


Physical Description:

No fusion crust is preserved on this tabular stone (9.0x6.0x2.5 cm). The exterior of the specimen is shiny, reddish-brown with lighter brownish-gold streaks randomly distributed over the surface. One fracture appears to penetrate the sample completely and numerous, smaller cracks are present, many of which are parallel, cover the exterior surfaces. This sample appears exfoliated. When the thin section sample was taken, no fresh metal was exposed on the stone.


Petrographic Description: Brian Mason

Chondritic structure is prominent in the thin section, but the margins of some chondrules are indistinct and tend to merge with the granular matrix. Some barred olivine and porphyritic olivine chondrules have gray turbid interstitial material, probably devitrified glass. Minor minerals include nickel-iron and troilite. A moderate amount of brown limonitic staining pervades the section, and small patches of limonite surround some of the metal grains. Plagioclase is present as small untwinned grains difficult to recognize. Microprobe analyses give the composition of the olivine as Fa18, the orthopyroxene as Fs17, and the plagioclase as An12.

Data from:
  Table 2
  Line 22:
Origin or pseudonym:Main icefield
Mass (g):308.8
Weathering grade:C
Fayalite (mol%):18
Ferrosilite (mol%):17
Comments:26Al=55±3; 77014 pairing group
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References: Published in Antarctic Meteorite Newsletter 2(1) (1979), 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° 43'S, 159° 40'E)

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