Meteoritical Bulletin: Entry for Graves Nunataks 98005

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Graves Nunataks 98005

Basic information

Name: Graves Nunataks 98005
This is an OFFICIAL meteorite name.
Abbreviation: GRA 98005
Observed fall: No
Year found: 1998
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 203 g

Classification
history:

Antarctic Meteorite Newsletter:	AMN 22(2)	(1999)	C2
NHM Catalogue:	5th Edition	(2000)	C2
Meteoritical Bulletin:	MB 84	(2000)	C2
MetBase:	v. 7.1	(2006)	C2
Antarctic Meteorite Newsletter:	AMN 33(1)	(2010)	CM2
Recommended:			CM2 [explanation]

This is 1 of 636 approved meteorites classified as CM2. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites

Writeup

Writeup from AMN 22(2):

Sample No.:	GRA 98 005
Location:	Graves Nunataks
Dimensions (cm):	8.0x5.5x2.5
Weight (g):	202.85
Meteorite Type:	C2 Chondrite

Macroscopic Description: Kathleen McBride
The exterior of this carbonaceous chondrite is dull and black with white evaporites along the edges. The top face has a large yellowish brown inclusion. The meteorite appears to have no fusion crust. The interior is brown, very weathered and crumbles easily. Evaporite deposits are present on the interior surface.

Thin Section (,6) Description: Tim McCoy
The section consists of a few small chondrules (up to 0.5 mm), mineral grains and CAIs set in a black matrix; rare metal and sulfide grains are present. Olivine compositions are Fa_0-4, orthopyroxene is Fs_1-2. The matrix consists dominantly of an Fe-rich serpentine. The meteorite is a C2 chondrite.

Data from:
  MB84
  Table A1
  Line 6:

Origin or pseudonym:	Lower Central
Mass (g):	202.9
Class:	C2
Weathering grade:	CE
Fayalite (mol%):	0-4
Ferrosilite (mol%):	1-2
Comments:	98005 pairing group

Catalogs:

Search for specimens in the Smithsonian Institution collection (U.S.):	Require SI photo
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References:

Published in Antarctic Meteorite Newsletter 22(2) (1999), JSC, Houston
Published in Meteoritical Bulletin, no. 84, MAPS 35, A199-A225 (2000)

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Photos:

Credit	Photos
Photographs from AMN:
Photograph from unknown source	A photo is in the write-up above
Photos from the Encyclopedia of Meteorites:
Dr Carlton Allen, JSC-KT, NASA

Geography:

Antarctica

Coordinates:
Catalogue of Meteorites:	(86° 43'S, 141° 30'W)
Recommended::	(86° 43'S, 141° 30'W)

Statistics:
This is 1 of 44543 approved meteorites from Antarctica (plus 3802 unapproved names)

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