Meteoritical Bulletin: Entry for Graves Nunataks 98025

MetSoc Home Publications Contacts

Search the Meteoritical Bulletin Database
Last update: 18 Nov 2023
Search for:	Search type:	Search limits:	Display:	Publication:
Names Text Places Classes Years	Contains Starts with Exact Sounds like	NonAntarctic Falls Non-NWAs Has strewnfield		What's new in the last:
Include past classifications in search		Has photo	Limit to approved meteorite names
Search text:

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: 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 25 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)

Writeup

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

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


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 Fa_1-37, with most Fa_0-2, and pyroxenes from Fs_1-3Wo_1-3. 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:

Search for specimens in the Smithsonian Institution collection (U.S.):	Require SI photo
Search for this meteorite in the NASA/JSC database (U.S.):

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)

Find references in NASA ADS:
Find references in Google Scholar:

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 44248 approved meteorites from Antarctica (plus 3802 unapproved names)

Proximity search:

Direct link to this page