Meteoritical Bulletin: Entry for MacKay Glacier 92502

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MacKay Glacier 92502

Basic information

Name: MacKay Glacier 92502
This is an OFFICIAL meteorite name.
Abbreviation: MCY 92502
Observed fall: No
Year found: 1992
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 0.7 g

Classification
history:

Antarctic Meteorite Newsletter:	AMN 17(1)	(1994)	C2
Meteoritical Bulletin:	MB 79	(1996)	C2
NHM Catalogue:	5th Edition	(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 17(1):

Sample No.: MCY92502

Location: MacKay Glacier

Dimensions (cm): 1.1 x 0.8 x 0.4

Weight (g): 0.7

Meteorite Type: C2 chondrite

Macroscopic Description: Carol Schwarz

Forty percent of this small fragment is covered with frothy fusion crust. The interior matrix is black and contains some small whitish inclusions. Evaporite deposit is abundant.

Thin Section (,2) Description: Brian Mason

The section shows sparse chondrules up to 0.9 mm across, irregular aggregates, and small mineral grains in a black matrix. The minerals are mainly olivine, with minor pyroxene. Olivine compositions are mostly near Mg2SiO4, but occasional iron-rich grains were analyzed, up to En35. Pyroxene compositions range from Fs2 to Fs4. The matrix appears to be largely iron-rich serpentine. The meteorite is a C2 chondrite, and is probably paired with MCY92500.

Data from:
  MB79
  Table 2
  Line 495:

Mass (g):	0.7
Class:	C2
Weathering grade:	Be
Fayalite (mol%):	1-35
Ferrosilite (mol%):	2-4

Catalogs:

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

Published in Antarctic Meteorite Newsletter 17(1) (1994), JSC, Houston
Published in Meteoritical Bulletin, no. 79, MAPS 31, A161-A174 (1996)

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Geography:

Antarctica

Coordinates:
Catalogue of Meteorites:	(76° 58'S, 162° 0'E)
Recommended::	(76° 58'S, 162° 0'E)

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

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Revision
history:

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