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Larkman Nunatak 12106
Basic information Name: Larkman Nunatak 12106
     This is an OFFICIAL meteorite name.
Abbreviation: LAR 12106
Observed fall: No
Year found: 2012
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 41.7 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 39(1)  (2016)  Ureilite
Meteoritical Bulletin:  MB 105  (2016)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 594 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 27 Feb 2016
Writeuphelp
Writeup from AMN 39(1):
Sample Number LAR 12106
Newsletter 39,1
Location Larkman Nunatak
Field Number 22630
Dimensions 4.5 x 3.5 x 1.5
Weight 41.70
Original Classification Ureilite
Mineral Composition (%Fa &  %Fs)
Fayalite (mol%): 3-17; Ferrosilite (mol%): 6-10
Weathering
AE
Fracturing
A/B
Macroscopic Description - Rachel Funk
Black fusion crust covers 70% of the fractured exterior. Some of the fusion crust has a vesicular appearance and minor evaporites are visible. The exposed surface is covered in dark reddish brown rust. Interior is a gray matrix with black elongated grains, 1 mm in length with minor amounts of orange rust present.
Thin Section Description (,2) - Cari Corrigan, Tim McCoy
The section consists of an aggregate of large olivine and pyroxene grains up to 3 mm across. Individual grains are rimmed by carbon-rich material containing particles and stringers of metal and rare sulfide. Olivine and pyroxene grains have been extensively mosaicized by shock. Olivine compositions are Fa3-17. Pyroxene compositions are Fs6-10Wo19-34. The meteorite is a ureilite.
Antarctic Meteorite Images for Sample LAR 12106
Lab Photo of Sample LAR 12106   Thin Section Photo of Sample LAR 12106 in Plane-Polarized Light with 2.5X Magnification  Thin Section Photo of Sample LAR 12106 in Reflected Light with 2.5X Magnification  Thin Section Photo of Sample LAR 12106 in Cross-Polarized Light with 2.5X Magnification 
Thin Section Photo of Sample LAR 12106 in Plane-Polarized Light with 5X Magnification  Thin Section Photo of Sample LAR 12106 in Reflected Light with 5X Magnification  Thin Section Photo of Sample LAR 12106 in Cross-Polarized Light with 5X Magnification 
Data from:
  MB105
  Table 0
  Line 0:
Date:2012
Mass (g):41.7
Pieces:1
Class:Ureilite
Weathering grade:Ae
Fayalite (mol%):3-17
Ferrosilite (mol%):6-10
Classifier:SI
Type spec mass (g):41.7
Type spec location:JSC
Main mass:JSC
Finder:ANSMET
Comments:Submitted by AMN
Institutions
   and collections
JSC: Mailcode KT, 2101 NASA Parkway, NASA Johnson Space Center, Houston, TX 77058, United States; Website (institutional address; updated 3 Sep 2013)
SI: Department of Mineral Sciences, NHB-119, National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, United States; Website (institutional address; updated 16 Jan 2012)
Catalogs:
Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 39(1) (2016), JSC, Houston
Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Antarctica
Coordinates:Unknown.

Statistics:
     This is 1 of 41899 approved meteorites from Antarctica (plus 3802 unapproved names)

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