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MacAlpine Hills 88107
Basic information Name: MacAlpine Hills 88107
     This is an OFFICIAL meteorite name.
Abbreviation: MAC 88107
Observed fall: No
Year found: 1988
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 192.8 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 12(3)  (1989)  C2
AMN 17(1)  (1994)  C2-ung
Meteoritical Bulletin:  MB 76  (1994)  C2-ung
NHM Catalogue:  5th Edition  (2000)  CM2
MetBase:  v. 7.1  (2006)  C3-ung
Antarctic Meteorite Newsletter:  AMN 30(2)  (2007)  Chondrite-ung
Recommended:  C3-ung    [explanation]

This is 1 of 17 approved meteorites classified as C3-ung.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), and Ungrouped chondrites
Comments: Field number: 5554
Writeuphelp
Writeup from AMN 12(3):

Sample No.: MAC88107

Location: MacAlpine Hills

Dimensions (cm): 8.5x4.5x3

Field Number: 5554 '

Weight (g): 192.8

Meteorite Type: C2 chondrite

 

Macroscopic Description: René Martinez

Eighty percent of this carbonaceous chondrite is covered by black fractured fusion crust. Overall it is shaped like a wedge with rounded edges. The interior is very fine grained and black. Light colored <1 mm inclusions are evenly distributed. A thin weathering rind (-1 mm) is marked by a thin discontinuous layer of evaporite just under the fusion crust.

 

Thin Section (,2) Description; Brian Mason

The section shows abundant small chondrules, averaging about 0 3 mm in diameter, and numerous mineral aggregates and mineral grains, set in a black matrix. Most of the chondrules consist, of granular olivine and olivine-pyroxene; one fine-grained radiating pyroxene was seen. Accessory amounts of finely-dispersed nickel-iron and sulfide are present. Microprobe analyses show that much of the olivine is near forsterite in composition, but occasional iron-rich grains are present (the overall range is Fa0.5-39, with a mean of Fa8). Pyroxene composition range is Fs0.8-9. The meteorite is a C2 carbonaceous chondrite.

 

Data from:
  MB76
  Table 2
  Line 4655:
Mass (g):192.8
Class:C2 ung
Weathering grade:Be
Fayalite (mol%):0.5-39
Ferrosilite (mol%):0.8-9
Catalogs:
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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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Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (84° 13'S, 160° 30'E)
     Recommended::   (84° 19' 5"S, 159° 37' 34"E)
Note: the NHM and recommended coordinates are 14.9 km apart

Statistics:
     This is 1 of 40719 approved meteorites from Antarctica (plus 4494 unapproved names)
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