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MacAlpine Hills 88100
Basic information Name: MacAlpine Hills 88100
     This is an OFFICIAL meteorite name.
Abbreviation: MAC 88100
Observed fall: No
Year found: 1988
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 177.3 g
Antarctic Meteorite Newsletter:  AMN 12(3)  (1989)  C2
AMN 17(1)  (1994)  CM2
Meteoritical Bulletin:  MB 76  (1994)  CM2
NHM Catalogue:  5th Edition  (2000)  CM2
MetBase:  v. 7.1  (2006)  CM2
Recommended:  CM2    [explanation]

This is 1 of 603 approved meteorites classified as CM2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites
Comments: Field number: 5745
Writeup from AMN 12(3):

Sample No.: MAC88100

Location: MacAlpine Hills

Dimensions (cm): 8x5.5x3

Field Number: 5745

Weight (g): 177.3

Meteorite Type: C2 chondrite


Macroscopic Description: René Martinez

This oriented carbonaceous chondrite is almost entirely covered by black fusion crust. A thin layer of evaporite deposit appears along the fusion crust-interior boundary. The interior is black with no inclusions visible to the naked eye.


Thin Section (,2) Description: Brian Mason

The section consists largely (about 80%) of translucent brown isotropic material, with sparse chondrules and many minute mineral grains, mostly olivine with minor pyroxene. Microprobe analyses show olivine and pyroxene compositions near Mg2SiO4 and MgSiO3 respectively, with a few more iron-rich grains. The meteorite is a C2 carbonaceous chondrite.

Data from:
  Table 2
  Line 4648:
Mass (g):177.3
Weathering grade:Be
Fayalite (mol%):0.5-24
Ferrosilite (mol%):1-4
Search for specimens in the Smithsonian Institution collection (U.S.):   
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Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 12(3) (1989), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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     Catalogue of Meteorites:   (84° 13'S, 160° 30'E)
     Recommended::   Unknown

     This is 1 of 41908 approved meteorites from Antarctica (plus 3802 unapproved names)

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