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MacAlpine Hills 88176
Basic information Name: MacAlpine Hills 88176
     This is an OFFICIAL meteorite name.
Abbreviation: MAC 88176
Observed fall: No
Year found: 1988
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 37.9 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 13(2)  (1990)  C2
Meteoritical Bulletin:  MB 76  (1994)  C2
NHM Catalogue:  5th Edition  (2000)  C2
MetBase:  v. 7.1  (2006)  CM2
Antarctic Meteorite Newsletter:  AMN 31(1)  (2008)  CM2
Recommended:  CM2    [explanation]

This is 1 of 540 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: 5555
Writeuphelp
Writeup from AMN 13(2):

Sample No. MAC88176

Location: MacAlpine Hills

Dimensions (cm): 4.5x3x2.5

Field Number: 5555

Weight (g): 37.9

Meteorite Type: C2 chondrite

 

Macroscopic Description: Robbie Marlow

Black, polygonally fractured fusion crust covers 75% of this oblong carbonaceous chondrite. The fusion crust is frothy on one surface. Evaporite deposit was exposed when this friable specimen was dissected. Oxidation is light and sub-millimeter sized white inclusions are evenly distributed throughout this meteorite.

 

Thin Section (,3) Description: Brian Mason

The section shows a few small chondrules and numerous mineral grains in a black matrix. Chondrules and mineral grains consist largely of olivine, with a minor amount of pyroxene. Microprobe analyses show that most of the olivine has a composition close to Mg2SiO4, with a few more iron-rich grains; pyroxene is clinoenstatite, composition range Fs1-8. The meteorite is a C2 carbonaceous chondrite.

 

Data from:
  MB76
  Table 2
  Line 4724:
Mass (g):37.9
Class:C2
Weathering grade:Be
Fayalite (mol%):1-34
Ferrosilite (mol%):1-8
Catalogs:
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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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Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (84° 13'S, 160° 30'E)
     Recommended::   (84° 19' 9"S, 159° 36' 18"E)
Note: the NHM and recommended coordinates are 15.2 km apart

Statistics:
     This is 1 of 40129 approved meteorites from Antarctica (plus 4494 unapproved names)
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