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Larkman Nunatak 04316
Basic information Name: Larkman Nunatak 04316
     This is an OFFICIAL meteorite name.
Abbreviation: LAR 04316
Observed fall: No
Year found: 2003
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 1163 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 28(2)  (2005)  Aubrite
Meteoritical Bulletin:  MB 91  (2007)  Aubrite
Recommended:  Aubrite    [explanation]

This is 1 of 63 approved meteorites classified as Aubrite.   [show all]
Search for other: Achondrites, Aubrites, Enstatite achondrites, and Enstatite-rich meteorites
Comments: Approved 1 Sep 2005
Writeuphelp
Writeup from AMN 28(2):
Sample No.: LAR 04316
Location: Larkman Nunatak
Field No.: 15577
Dimensions (cm):   12.0x7.0x7.0
Weight (g): 1163.0
Meteorite Type: Aubrite
    
LAR 04316 LAR 04316 LAR 04316
LAR 04316 LAR 04316 LAR 04316
   

Macroscopic Description: Kathleen McBride
Very little fusion crust is left on the exterior surface. The three areas of remaining crust are brown/black in color and have the characteristic "bubbly" appearance. There are some areas of yellow crusty material. The interior has a light gray matrix with large, angular white and gray clasts. Smaller clasts are usually white. There is a large 2.5 cm black clast with rust located in the center of the break. The interior contains multiple dark gray to almost black angular clasts with basaltic texture.

Thin Section (,3 ,4 ,7) Description: Tim McCoy
Section ,3 samples a comminuted matrix of essentially FeO-free enstatite (Fs0-1) and diopside (Fs1Wo45) with grain sizes reaching 3 mm and rarer metal, phosphide, troilite, daubreelite and alabandite. This material makes up the bulk of the meteorite. Two clasts described in the macroscopic description, and apparently in contact in the piece, are an aubrite basalt vitrophyre of the type recently described by Fogel (GCA 69, 1633-1648) composed of enstatite (Fs2) and forsterite (Fa2) in a matrix of feldspathic glass and a metal-sulfide quench-textured clast with a single 0.5 mm alabandite grain. The meteorite is an aubrite.


LAR 04316 - Cross-Polarized Light LAR 04316 - Reflected Light LAR 04316 - Cross-Polarized Light
LAR 04316
Cross-Polarized Light
LAR 04316
Reflected Light
LAR 04316
Cross-Polarized Light
LAR 04316 - Reflected Light LAR 04316 - Reflected Light LAR 04316 - Reflected Light
LAR 04316
Reflected Light
LAR 04316
Reflected Light
LAR 04316
Reflected Light
Data from:
  MB91
  Table 4
  Line 693:
Mass (g):1163
Class:Aub
Weathering grade:A
Fayalite (mol%):2
Ferrosilite (mol%):0-2
Catalogs:
Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 28(2) (2005), JSC, Houston
Published in Meteoritical Bulletin, no. 91, MAPS 42, 413-466 (2007)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
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:Unknown.

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

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