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Larkman Nunatak 12283
Basic information Name: Larkman Nunatak 12283
     This is an OFFICIAL meteorite name.
Abbreviation: LAR 12283
Observed fall: No
Year found: 2012
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 26.2 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 38(2)  (2015)  Ureilite
Meteoritical Bulletin:  MB 104  (2015)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 572 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 28 Aug 2015
Revised 28 Oct 2019: Corrected mass, per JSC
Writeuphelp
Writeup from AMN 38(2):
Sample Number LAR 12283
Newsletter 38,2
Location Larkman Nunatak
Field Number 23943
Dimensions 4.0 x 2.6 x 2.0
Weight 26.33
Original Classification Ureilite
Mineral Composition (%Fa &  %Fs)
Fayalite (mol%): 3-21
Macroscopic Description - Cecilia Satterwhite
The rough pebbly textured exterior has 25% black fusion crust. The interior is a black matrix with metal and brown oxidation. It has a platy texture with crystal faces visible.
Thin Section Description (,2) - Cari Corrigan, Tim McCoy
The section consists of an aggregate of large olivine grains up to 2 mm across. Individual olivine grains are rimmed by carbon-rich material containing traces of metal. Olivines have cores of Fa21, with rims reduced to Fa3. The meteorite is a ureilite.
Antarctic Meteorite Images for Sample LAR 12283
Lab Photo of Sample LAR 12283 Displaying North Orientation  Lab Photo of Sample LAR 12283 Displaying South Top Orientation  Thin Section Photo of Sample LAR 12283 in Plane-Polarized Light with 2.5X Magnification  Thin Section Photo of Sample LAR 12283 in Reflected Light with 2.5X Magnification 
Thin Section Photo of Sample LAR 12283 in Cross-Polarized Light with 2.5X Magnification  Thin Section Photo of Sample LAR 12283 in Plane-Polarized Light with 5X Magnification  Thin Section Photo of Sample LAR 12283 in Reflected Light with 5X Magnification  Thin Section Photo of Sample LAR 12283 in Cross-Polarized Light with 5X Magnification 
Data from:
  MB104
  Table 0
  Line 0:
Date:2012
Mass (g):26.3
Pieces:1
Class:Ureilite
Weathering grade:B/Ce
Fayalite (mol%):3-21
Classifier:SI
Type spec mass (g):26.3
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 40753 approved meteorites from Antarctica (plus 4494 unapproved names)

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