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Graves Nunataks 98074
Basic information Name: Graves Nunataks 98074
     This is an OFFICIAL meteorite name.
Abbreviation: GRA 98074
Observed fall: No
Year found: 1998
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 51.9 g
NHM Catalogue:  5th Edition  (2000)  CM2
Antarctic Meteorite Newsletter:  AMN 23(1)  (2000)  CM2
Meteoritical Bulletin:  MB 84  (2000)  CM2
MetBase:  v. 7.1  (2006)  CM2
Recommended:  CM2    [explanation]

This is 1 of 603 approved meteorites classified as CM2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites
Writeup from AMN 23(1):
Sample No.: GRA 98074
Location: Graves Nunataks
Dimensions (cm):   5.0x3.0x2.5
Weight (g): 53.324
Meteorite Type: CM2 Chondrite

Macroscopic Description: Kathleen McBride
A rough, purplish fusion crust with polygonal fractures covers 35% of the exterior. This meteorite is very fractured.  The interior is very weathered.  It has a gray-white appearance due to evaporites.  Black matrix, containing white, tan and rusty chondrules.  The meteorite is very friable.

Thin Section (, 2) Description: Tim McCoy
GRA 98074 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.  The chondrules are flattened as a result of shock.  Olivine compositions are Fa1-34, with most Fa1-2; no orthopyroxene grains are measured.  The matrix consists dominantly of an Fe-rich serpentine.  The meteorite is a CM2 chondrite and may be paired with GRA98005.

Data from:
  Table A1
  Line 75:
Origin or pseudonym:Lower NE
Mass (g):51.9
Weathering grade:CE
Fayalite (mol%):1-34
Comments:98005 pairing group
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References: Published in Antarctic Meteorite Newsletter 23(1) (2000), JSC, Houston
Published in Meteoritical Bulletin, no. 84, MAPS 35, A199-A225 (2000)
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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   

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

     This is 1 of 41908 approved meteorites from Antarctica (plus 3802 unapproved names)
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