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MacAlpine Hills 041169
Basic information Name: MacAlpine Hills 041169
     This is an OFFICIAL meteorite name.
Abbreviation: MAC 041169
Observed fall: No
Year found: 2004
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 3.2 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 29(1)  (2006)  Eucrite-unbr
Meteoritical Bulletin:  MB 91  (2007)  Eucrite-unbr
Recommended:  Eucrite-unbr    [explanation]

This is 1 of 92 approved meteorites classified as Eucrite-unbr.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Field number: 15371
Approved 21 Feb 2006
Writeuphelp
Writeup from AMN 29(1):
Sample No.: MAC 041169
Location: MacAlpine Hills
Field No.: 15371
Dimensions (cm):   1.75x1.5x0.75
Weight (g): 3.187
Meteorite Type: Eucrite (Unbrecciated)
MAC 041169


Macroscopic Description: Kathleen McBride
40% rough, black fusion crust covers the exterior of this meteorite. The interior is a coarse grained black and white matrix with rusty areas.

Thin Section (, 3) Description: Tim McCoy
Cross-Polarized LightPlane-Polarized Light
MAC 041169 - Cross-Polarized Light MAC 041169 - Plane-Polarized Light
The meteorite is a medium-grained (100-200 micron grain size), unbrecciated basalt with numerous late-stage interstitial melt pockets that can reach several hundreds of microns. Mineral compositions are relatively homogeneous with orthopyroxene (Fs57-64Wo2-5), with 1-5 micron lamellae of augite (Fs32Wo39), and plagioclase (An89Or0.5). The Fe/Mn ratio of the pyroxene is ~30. The meteorite is an unbrecciated eucrite.
Data from:
  MB91
  Table 4
  Line 821:
Mass (g):3.2
Class:Euc (unbrecciated)
Weathering grade:B
Fayalite (mol%):57-64
Catalogs:
Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 29(1) (2006), JSC, Houston
Published in Meteoritical Bulletin, no. 91, MAPS 42, 413-466 (2007)
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Photos:
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Photographs from AMN:
Photograph from unknown source A photo is in the write-up above
Photos from the Encyclopedia of Meteorites:
unknown         
Geography:

Antarctica
Coordinates:
     Recommended::   (84° 18' 53"S, 159° 50' 2"E)

Statistics:
     This is 1 of 39173 approved meteorites from Antarctica (plus 5051 unapproved names)
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