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MacAlpine Hills 88101
Basic information Name: MacAlpine Hills 88101
     This is an OFFICIAL meteorite name.
Abbreviation: MAC 88101
Observed fall: No
Year found: 1988
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 20.9 g
Antarctic Meteorite Newsletter:  AMN 13(2)  (1990)  C2
Meteoritical Bulletin:  MB 76  (1994)  C2
NHM Catalogue:  5th Edition  (2000)  CM2
MetBase:  v. 7.1  (2006)  CM2
Antarctic Meteorite Newsletter:  AMN 31(1)  (2008)  CM2
Recommended:  CM2    [explanation]

This is 1 of 606 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: 5483
Writeup from AMN 13(2):

Sample No. MAC88101

Location: MacAlpine Hills

Dimensions (cm): 4.2x3x2

Field Number: 5483

Weight (g): 20.9

Meteorite Type: C2 chondrite


Macroscopic Description: Robbie Marlow

Eighty percent of the fusion crust on this carbonaceous chondrite has been plucked off. The fusion crust remaining is thick and dull black. Areas devoid of fusion crust are greenish in color. The interior matrix is black with a greenish-tinge and has no obvious inclusions. Traces of evaporite deposit were noted immediately underneath the fusion crust.


Thin Section (,3) Description: Brian Mason

The section shows a few small chondrules and numerous mineral grains in a dark brown to black semi-translucent matrix. The chondrules and mineral grains consist largely of olivine, with minor pyroxene; a few calcite grains were noted. Microprobe analyses show that most of the olivine is near Mg2SiO4 in composition, with a few more iron-rich grains; pyroxene is clinoenstatite, with composition range Fs1-5. The meteorite is a C2 carbonaceous chondrite.

Data from:
  Table 2
  Line 4649:
Mass (g):20.9
Weathering grade:Be
Fayalite (mol%):1-25
Ferrosilite (mol%):1-5
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References: Published in Antarctic Meteorite Newsletter 13(2) (1990), 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::   (84° 19' 6"S, 159° 43' 8"E)
Note: the NHM and recommended coordinates are 14.3 km apart

     This is 1 of 43331 approved meteorites from Antarctica (plus 3802 unapproved names)
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