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MacKay Glacier 92500
Basic information Name: MacKay Glacier 92500
     This is an OFFICIAL meteorite name.
Abbreviation: MCY 92500
Observed fall: No
Year found: 1992
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 23.4 g
Antarctic Meteorite Newsletter:  AMN 16(2)  (1993)  C2
Meteoritical Bulletin:  MB 76  (1994)  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 620 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 16(2):

Sample No.: MCY92500

Location: Mackay Glacier

Dimensions (cm): 2.9 x 2.6 x 2.3

Weight (g): 23.4

Meteorite Type: C2 chondrite


Macroscopic Description: Cecilia Satterwhite Fractured, black fusion crust covers 25% of this carbonaceous chondrite. The interior matrix is fine-grained, medium to dark gray, with abundant small white and gray inclusions. A few chondrules are visible. Oxidation is minor.


Thin Section (.5) Description: Brian Mason

The section shows chondrules up to 1.2 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 Fs40. Pyroxene compositions range from Fs1 to Fs4. The matrix appears to be largely iron-rich serpentine. The meteorite is a C2 Chondrite.


Data from:
  Table 2
  Line 4753:
Mass (g):23.4
Weathering grade:A
Fayalite (mol%):0-42
Ferrosilite (mol%):1-5
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References: Published in Antarctic Meteorite Newsletter 16(2) (1993), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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     Catalogue of Meteorites:   (76° 58'S, 162° 0'E)
     Recommended::   (76° 58'S, 162° 0'E)

     This is 1 of 43840 approved meteorites from Antarctica (plus 3802 unapproved names)
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