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Allan Hills 85114
Basic information Name: Allan Hills 85114
     This is an OFFICIAL meteorite name.
Abbreviation: ALH 85114
Observed fall: No
Year found: 1985
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 11.4 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 10(2)  (1987)  H5
Meteoritical Bulletin:  MB 76  (1994)  H5
NHM Catalogue:  5th Edition  (2000)  H5
MetBase:  v. 7.1  (2006)  H5
Recommended:  H5    [explanation]

This is 1 of 10209 approved meteorites (plus 18 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 10(2):

Sample No.: ALH85114

Location: Allan Hills

Weight (g): 11.4

Field No.: 2626

Dimensions (cm): 3 x 2 x 1.5

Meteorite Type: H5 Chondrite with Enclave

 

Macroscopic Description: Roberta Score

ALH85114 is a very weathered chondrite fragment with an unusual feature. A fractured, but coherent, greenish-gray, 0.7 x 0.7 x 0.5 cm, olivine clast remains on the exterior surface. Dull black fusion crust covers 70% of the exterior. The fracture surface that contains the clast is red-brown. The interior of ALH85114 is extensively weathered.

 

Thin Section (,4) Description: Brian Mason

The section shows numerous chondrules, up to 1.5 mm across, in a matrix of fine-grained olivine and pyroxene with minor amounts of troilite and nickel-iron. On one edge is an enclave consisting largely of coarse-grained olivine (crystals up to 1.8 mm long). Some of the crystals appear to be granulated, possibly a shock effect; others are barred, the bars consisting of plagioclase (An11). In the chondritic area mineral compositions are olivine, Fa18; pyroxene, Fs16. Enclave olivine composition is Fa18. The meteorite is an H5 chondrite.

Data from:
  MB76
  Table 2
  Line 1343:
Origin or pseudonym:Far Western
Mass (g):11.4
Class:H5
Weathering grade:C
Fayalite (mol%):18
Ferrosilite (mol%):16
Comments:NTL=8.92±0.07
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 10(2) (1987), 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° 50' 13"S, 156° 27' 10"E)
Note: the NHM and MetBase coordinates are 83.2 km apart

Statistics:
     This is 1 of 40719 approved meteorites from Antarctica (plus 4494 unapproved names)
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