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Allan Hills A77165
Basic information Name: Allan Hills A77165
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA77165
This meteorite may also be called Allan Hills 77165 (ALH 77165) in publications.

Observed fall: No
Year found: 1977
Country: Antarctica [Collected jointly by ANSMET (US) and NIPR (Japan)]
Mass:help 30.5 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 1(3)  (1978)  L3
Meteoritical Bulletin:  MB 76  (1994)  L3
NHM Catalogue:  5th Edition  (2000)  L3
NIPR Catalogue:  2000 Edition  (2000)  L3
MetBase:  v. 7.1  (2006)  L3.5
Recommended:  L3.5    [explanation]

This is 1 of 95 approved meteorites classified as L3.5.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Writeuphelp
Writeup from AMN 1(3):
This text was reprinted from AMN 1(3) in AMN 4(1). In some cases, it may be an updated version from the original.

Sample No.: ALHA77165

Location: Allan Hills

Field No.: 77123004

Weight (gms): 30.50

Meteorite Type: L3 Chondrite

 

Physical Description:

About 50% of surface of meteorite is angular, dark brown and has a patina, probably the result of chemical weathering and wind ablation. The remaining 50% of the sample is smooth and contains patches of fusion crust. This is not a complete specimen. Its maximum length is approximately 3.5 cm. No fresh metal was revealed by chipping the sample for thin section preparation. From field photographs it is apparent that the N.W. surface was in contact with the ice.

 

Petrographic Description: Brian Mason

This specimen is similar in texture, mineral composition, and degree of weathering to ALHA77160 and 77164, which suggests it may be another piece of the same meteorite.

Data from:
  MB76
  Table 2
  Line 132:
Origin or pseudonym:Main icefield
Mass (g):30.5
Class:L3
Weathering grade:C
Fayalite (mol%):8-33
Ferrosilite (mol%):6-35
Comments:26Al=28±1; 77011 pairing group
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 1(3) (1978), 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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