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Allan Hills 84038
Basic information Name: Allan Hills 84038
     This is an OFFICIAL meteorite name.
Abbreviation: ALH 84038
Observed fall: No
Year found: 1984
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 12.3 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 9(2)  (1986)  C4
AMN 17(1)  (1994)  CK4
Meteoritical Bulletin:  MB 76  (1994)  CK4
NHM Catalogue:  5th Edition  (2000)  CK4
MetBase:  v. 7.1  (2006)  CK4
Recommended:  CK4    [explanation]

This is 1 of 105 approved meteorites classified as CK4.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Writeuphelp
Writeup from AMN 9(2):

Sample No.: ALH84038

Location: Allan Hills

Weight (g): 12.3

Field No.: 2468

Dimensions (cm): 2 x 2.3 x 1.5

Meteorite Type: C4 Chondrite

 

Macroscopic Description: Carol Schwarz

This carbonaceous chondrite fragment has black to reddish fusion crust on all but one surface. The interior is dark gray and fine-grained with no features visible. Some white evaporite deposit was exposed.

 

Thin Section (,3) Description: Brian Mason

The section consists largely of finely granular olivine (grains ranging up to 0.1 mm) with rare chondrules and chondrule fragments, and a little opaque material. Microprobe analyses gave the following compositions: olivine, Fa25-30 (one grain Fa39), mean Fa28; pyroxene and plagioclase may be present in small amounts, but were not found with the probe. The meteorite is classified as a C4 chondrite. It is very similar to ALH82135 and the possibility of pairing should be considered.

Data from:
  MB76
  Table 2
  Line 1003:
Origin or pseudonym:Far Western
Mass (g):12.3
Class:CK4
Weathering grade:Ae
Fayalite (mol%):25-30
Comments:82135 pairing group
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 9(2) (1986), 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° 53' 21"S, 157° 3' 4"E)
Note: the NHM and MetBase coordinates are 69.4 km apart

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