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Larkman Nunatak 12234
Basic information Name: Larkman Nunatak 12234
     This is an OFFICIAL meteorite name.
Abbreviation: LAR 12234
Observed fall: No
Year found: 2012
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 35.6 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 39(1)  (2016)  L3.6
Meteoritical Bulletin:  MB 105  (2016)  L3.6
Recommended:  L3.6    [explanation]

This is 1 of 62 approved meteorites classified as L3.6.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 27 Feb 2016
Writeuphelp
Writeup from AMN 39(1):
Sample Number LAR 12234
Newsletter 39,1
Location Larkman Nunatak
Field Number 23274
Dimensions 3.2 x 2.3 x 2.0
Weight 35.56
Original Classification L3.6 Chondrite
Mineral Composition (%Fa &  %Fs)
Fayalite (mol%): 1-25; Ferrosilite (mol%): 4
Weathering
A/B
Fracturing
A/B
Macroscopic Description - Mitchell Haller
80% of the exterior has black fusion crust with some weathered areas. The interior is dark gray to black with large gray and weathered inclusions/chondrules (~3mm).
Thin Section Description (,2) - Cari Corrigan, Tim McCoy
The section exhibits numerous large, well-defined chondrules (up to 2 mm) in a dark matrix of fine-grained silicates, metal and troilite. Weak shock effects are present. Polysynthetically twinned pyroxene is present. The meteorite is extensively weathered and stained. Silicates are unequilibrated; olivines range from Fa1-25 and pyroxene is Fs3Wo0.4. The meteorite is an L3 chondrite (estimated subtype 3.6).
Antarctic Meteorite Images for Sample LAR 12234
Thin Section Photo of Sample LAR 12234 in Plane-Polarized Light with 2.5X Magnification  Thin Section Photo of Sample LAR 12234 in Reflected Light with 2.5X Magnification  Thin Section Photo of Sample LAR 12234 in Cross-Polarized Light with 2.5X Magnification  Thin Section Photo of Sample LAR 12234 in Plane-Polarized Light with 5X Magnification 
Thin Section Photo of Sample LAR 12234 in Reflected Light with 5X Magnification  Thin Section Photo of Sample LAR 12234 in Cross-Polarized Light with 5X Magnification 
Data from:
  MB105
  Table 0
  Line 0:
Date:2012
Mass (g):35.6
Pieces:1
Class:L3.6
Weathering grade:A/B
Fayalite (mol%):1-25
Ferrosilite (mol%):4
Classifier:SI
Type spec mass (g):35.6
Type spec location:JSC
Main mass:JSC
Finder:ANSMET
Comments:Submitted by AMN
Institutions
   and collections		 JSC: Mailcode XI, 2101 NASA Parkway, NASA Johnson Space Center, Houston, TX 77058, United States; Website (institutional address; updated 28 Jul 2022)
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:
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Geography:

Antarctica
Coordinates:Unknown.

Statistics:
     This is 1 of 44543 approved meteorites from Antarctica (plus 3802 unapproved names)
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Revision
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