Meteoritical Bulletin: Entry for Allan Hills 85151

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Allan Hills 85151

Basic information

Name: Allan Hills 85151
This is an OFFICIAL meteorite name.
Abbreviation: ALH 85151
Observed fall: No
Year found: 1985
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 13.9 g

Classification
history:

Antarctic Meteorite Newsletter:	AMN 10(2)	(1987)	C4
	AMN 13(3)	(1990)	Chondrite-unique
	AMN 17(1)	(1994)	Carlisle Lakes-like
Meteoritical Bulletin:	MB 76	(1994)	R
NHM Catalogue:	5th Edition	(2000)	R
MetBase:	v. 7.1	(2006)	R3.6
Antarctic Meteorite Newsletter:	AMN 31(1)	(2008)	R3.6
Recommended:			R3.6 [explanation]

This is 1 of 4 approved meteorites classified as R3.6. [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 3)

Writeup

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Writeup from AMN 10(2):

Sample No.: ALH85151

Location: Allan Hills

Weight (g): 13.9

Field No.: 2623

Dimensions (cm): 3 x 3 x 1.5

Meteorite Type: C4 Chondrite

Macroscopic Description: Roberta Score

A small amount of dull black fusion crust remains on this stone. The exterior surface is dull brownish-gray and is heavily pitted. Chondrules and clasts show relief on the surface. One notable clast is black with small white inclusions. The interior is medium-gray in color with white inclusions. Oxidation is extensive in some areas.

Thin Section (,3) Description: Brian Mason

The section shows numerous chondrules (up to 1.2 mm across) and chondrule fragments in a finely granular matrix. Most of the Chondrules consist of granular or porphyritic olivine; pyroxene is rare. Minor amounts of nickel-iron and sulfide are present, mainly as very small grains scattered through the matrix. Microprobe analyses show olivine compositions ranging from Fa0.4 to Fa41, with a mean of Fa34. Pyroxene compositions range from Fs6 to Fs30. The meteorite is classified as a C4 chondrite.

Data from:
  MB76
  Table 2
  Line 1379:

Origin or pseudonym:	Far North
Mass (g):	13.9
Class:	"R"
Weathering grade:	B
Fayalite (mol%):	0.4-41
Ferrosilite (mol%):	6-30
Comments:	NTL=155±2

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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

Antarctica

Coordinates:
Catalogue of Meteorites:	(76° 43'S, 159° 40'E)
Recommended::	(76° 43'S, 159° 40'E)

Statistics:
This is 1 of 44248 approved meteorites from Antarctica (plus 3802 unapproved names)

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