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Graves Nunataks 98025
Basic information Name: Graves Nunataks 98025
     This is an OFFICIAL meteorite name.
Abbreviation: GRA 98025
Observed fall: No
Year found: 1998
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 14.4 g
Classification
  history:
NHM Catalogue:  5th Edition  (2000)  CR2
Antarctic Meteorite Newsletter:  AMN 23(1)  (2000)  CR2
Meteoritical Bulletin:  MB 84  (2000)  CR2
MetBase:  v. 7.1  (2006)  CR2
Antarctic Meteorite Newsletter:  AMN 41(1)  (2018)  C2-ung
Recommended:  C2-ung    [explanation]

This is 1 of 19 approved meteorites classified as C2-ung.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), and Ungrouped chondrites
Comments: Revised 3 Jun 2019: reclassified in AMN 41(1)
Writeuphelp
Writeup from AMN 23(1):
Sample No.: GRA 98025
Location: Graves Nunataks
Dimensions (cm):   3.0x2.0x1.5
Weight (g): 14.362
Meteorite Type: CR2 Chondrite
    gra98025

Macroscopic Description: Kathleen McBride
The exterior surface has one small patch of fusion crust that is less than 0.5 cm in diameter.  The interior is black-brown in color with tiny (<1 mm) inclusions that are yellow to rust in color.  This meteorite is very brittle.

Thin Section (, 2) Description: Tim McCoy

GRA98025 GRA98025
Cross-Polarized Light Reflected Light
The section exhibits small (100-300 microns), well-defined, metal-rich chondrules and CAI’s in a dark matrix of FeO-rich phyllosilicate.  Polysynthetically twinned pyroxene is abundant.   Silicates are unequilibrated; olivines range from Fa1-37, with most Fa0-2, and pyroxenes from Fs1-3Wo1-3.  The meteorite is probably a CR2 chondrite.

Writeup from AMN 41(1):
GRA 98025: reclassification

Listed by Choe et al. (2010) as C2-ungrouped
Bibliography:
  • Choe W. H., Huber H., Rubin A.E., Kallemeyn G. W., and Wasson J. T. (2010) Compositions and taxonomy of 15 unusual carbonaceous chondrites. Meteorit. Planet. Sci. 45, 531-554 (link)
Data from:
  MB84
  Table A1
  Line 26:
Origin or pseudonym:Lower Central
Mass (g):14.4
Class:CR2
Weathering grade:C
Fayalite (mol%):1-37
Ferrosilite (mol%):1-3
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 23(1) (2000), JSC, Houston
Published in Antarctic Meteorite Newsletter 41(1) (2018), 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 39173 approved meteorites from Antarctica (plus 5051 unapproved names)
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