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Allan Hills A77064
Basic information Name: Allan Hills A77064
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA77064
This meteorite may also be called Allan Hills 77064 (ALH 77064) in publications.

Observed fall: No
Year found: 1977
Country: Antarctica [Collected jointly by ANSMET (US) and NIPR (Japan)]
Mass:help 6.5 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 1(2)  (1978)  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 9646 approved meteorites (plus 16 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)
Writeuphelp
Writeup from AMN 4(1):

Sample No.: ALHA77064

Location: Allan Hills

Field No.: 77122786

Weight (gms): 6.47

Meteorite Type: H5 Chondrite

 

Physical Description:

The sample is angular. Approximately 1/2 the exterior surface is covered by a brownish-black fusion crust that ranges up to 2 mm in thickness. The remaining exterior surface is light to medium gray with appreciable iron-oxide staining. Several rounded inclusions, some of which are ringed with black material, are present on the fracture surface. From field photographs it appears that the B surface is resting on the ice.

 

Petrographic Description: Brian Mason

This meteorite is similar in texture, mineral composition, and degree of weathering to Allan Hills 77061 and 77062, which suggests that these three stones may be separate pieces of the same meteorite.

Data from:
  MB76
  Table 2
  Line 58:
Origin or pseudonym:Main icefield
Mass (g):6.5
Class:H5
Weathering grade:B
Fayalite (mol%):18
Ferrosilite (mol%):17
Comments:77021 pairing group
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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