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Graves Nunataks 98102
Basic information Name: Graves Nunataks 98102
     This is an OFFICIAL meteorite name.
Abbreviation: GRA 98102
Observed fall: No
Year found: 1998
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 7 g
Classification
  history:
NHM Catalogue:  5th Edition  (2000)  CK4
Antarctic Meteorite Newsletter:  AMN 23(1)  (2000)  CK4
Meteoritical Bulletin:  MB 84  (2000)  CK4
MetBase:  v. 7.1  (2006)  CK4
Recommended:  CK4    [explanation]

This is 1 of 112 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 23(1):
Sample No.: GRA 98102
Location: Graves Nunataks
Dimensions (cm):   2.0x2.0x1.5
Weight (g): 6.973
Meteorite Type: CK4 Chondrite
    gra98100-107,109

Macroscopic Description: Kathleen McBride
The exterior is covered by rough black fusion crust over 100% of the surface.  The interior is a dark charcoal gray that is soft. Millimeter sized gray inclusions are visible.

Thin Section (, 3) Description: Tim McCoy

GRA 98102 GRA 98102
Cross-Polarized Light Reflected Light
The section consists of large (up to 2 mm), well-defined chondrules in a matrix of finer-grained silicates, sulfides and very abundant magnetite.  The meteorite is little weathered, but extensively shock blackened.  Silicates are homogeneous.  Olivine is Fa24 and orthopyroxene is Fs 23.  The meteorite appears to be a CK4 chondrite, although the silicates are poorer in FeO than typical for CK4 chondrites (Fa29-33).
Data from:
  MB84
  Table A1
  Line 103:
Origin or pseudonym:Lower Central
Mass (g):7
Class:CK4
Weathering grade:B
Fayalite (mol%):24
Ferrosilite (mol%):23
Catalogs:
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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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Photos:
CreditPhotos
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 40849 approved meteorites from Antarctica (plus 4494 unapproved names)
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