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Larkman Nunatak 12204
Basic information Name: Larkman Nunatak 12204
     This is an OFFICIAL meteorite name.
Abbreviation: LAR 12204
Observed fall: No
Year found: 2012
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 15.4 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 38(1)  (2015)  Iron, IIAB
Meteoritical Bulletin:  MB 104  (2015)  Iron, IIAB
Recommended:  Iron, IIAB    [explanation]

This is 1 of 137 approved meteorites classified as Iron, IIAB.   [show all]
Search for other: IIAB irons, Iron meteorites, and Metal-rich meteorites
Comments: Approved 12 Feb 2015
Writeuphelp
Writeup from AMN 38(1):
Sample Number LAR 12204
Newsletter 38,1
Location Larkman Nuntak
Field Number 23141
Dimensions 2.8 x 1.8 x 0.5
Weight 15.35
Original Classification Iron-IIAB
Macroscopic Description - Cari Corrigan and Tim McCoy
The main mass of this meteorite is flattened and has an intermittently dull and lustrous brown surface. The surface shows modest pitting over the entire surface, and frequent rust haloes are present.
Thin Section Description (,2) - Cari Corrigan and Tim McCoy
The meteorite was observed as a slice measuring 7 x 15 mm. Fusion crust appears to be present on one end of the section. The entire interior of the sample is converted to α2, with numerous elongate rhabdites. The average composition based on a microprobe traverse of 100 points is 5.3 wt% Ni and 0.2 wt% P. The meteorite is likely a IIAB iron but it has been heavily shocked or reheated.
Antarctic Meteorite Images for Sample LAR 12204
Lab Photo of Sample LAR 12204 Displaying Bottom Orientation  Lab Photo of Sample LAR 12204 Displaying East Orientation  Lab Photo of Sample LAR 12204 Displaying North Orientation  Lab Photo of Sample LAR 12204 Displaying South Orientation 
Lab Photo of Sample LAR 12204 Displaying Top Orientation  Lab Photo of Sample LAR 12204 Displaying West Orientation  Thin Section Photo of Sample LAR 12204 in Reflected Light with 1.25X Magnification  Thin Section Photo of Sample LAR 12204 in Reflected Light with 2.5X Magnification 
Data from:
  MB104
  Table 0
  Line 0:
Date:2012
Mass (g):15.4
Pieces:1
Class:Iron, IIAB
Classifier:SI
Type spec mass (g):15.4
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(1) (2015), JSC, Houston
Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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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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