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Larkman Nunatak 12075
Basic information Name: Larkman Nunatak 12075
     This is an OFFICIAL meteorite name.
Abbreviation: LAR 12075
Observed fall: No
Year found: 2012
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 21 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 38(2)  (2015)  LL3.8
Meteoritical Bulletin:  MB 104  (2015)  LL3.8
Recommended:  LL3.8    [explanation]

This is 1 of 33 approved meteorites classified as LL3.8.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 28 Aug 2015
Writeuphelp
Writeup from AMN 38(2):
Sample Number LAR 12075
Newsletter 38,2
Location Larkman Nunatak
Field Number 22609
Dimensions 3.2 x 2.1 x 1.4
Weight 20.96
Original Classification LL3.8 Chondrite
Mineral Composition (%Fa &  %Fs)
Fayalite (mol%): 19-32; Ferrosilite (mol%): 13-34
Macroscopic Description - Mitchell Haller
Glossy black fusion crust covers 90% of the exterior surface. Yellow colored chondrules/inclusions are visible. The interior is a black matrix with mm sized white and gray chondrules/inclusions.
Thin Section Description (,2) - Cari Corrigan, Tim McCoy
The section exhibits numerous small, well-defined chondrules (up to 1 mm) in a matrix of fine-grained silicates, metal and troilite. Polysynthetically twinned pyroxene is abundant. The meteorite is extensively weathered. Silicates are unequilibrated; olivines range from Fa19-32 and pyroxenes from Fs13-34. The meteorite is an LL3 chondrite (estimated subtype 3.8)
Antarctic Meteorite Images for Sample LAR 12075
Lab Photo of Sample LAR 12075   Thin Section Photo of Sample LAR 12075 in Plane-Polarized Light with 2.5X Magnification  Thin Section Photo of Sample LAR 12075 in Reflected Light with 2.5X Magnification  Thin Section Photo of Sample LAR 12075 in Cross-Polarized Light with 2.5X Magnification 
Thin Section Photo of Sample LAR 12075 in Plane-Polarized Light with 5X Magnification  Thin Section Photo of Sample LAR 12075 in Reflected Light with 5X Magnification  Thin Section Photo of Sample LAR 12075 in Cross-Polarized Light with 5X Magnification  Lab Photo of Sample LAR 12075 
Data from:
  MB104
  Table 0
  Line 0:
Date:2012
Mass (g):21.0
Pieces:1
Class:LL3.8
Weathering grade:A
Fayalite (mol%):19-32
Ferrosilite (mol%):13-34
Classifier:SI
Type spec mass (g):21.0
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 38(2) (2015), JSC, Houston
Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
Find references in NASA ADS:
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Geography:

Antarctica
Coordinates:Unknown.

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

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