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Larkman Nunatak 12059
Basic information Name: Larkman Nunatak 12059
     This is an OFFICIAL meteorite name.
Abbreviation: LAR 12059
Observed fall: No
Year found: 2012
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 171.3 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 38(1)  (2015)  Iron, IAB complex
Meteoritical Bulletin:  MB 104  (2015)  Iron, IAB complex
Recommended:  Iron, IAB complex    [explanation]

This is 1 of 68 approved meteorites (plus 1 unapproved name) classified as Iron, IAB complex.   [show all]
Search for other: IAB complex irons, Iron meteorites, and Metal-rich meteorites
Comments: Approved 12 Feb 2015
Writeuphelp
Writeup from AMN 38(1):
Sample Number LAR 12059
Newsletter 38,1
Location Larkman Nunatak
Field Number 23982
Dimensions 5.0 x 3.0 x 2.7
Weight 171.33
Original Classification Iron-IAB
Mineral Composition (%Fa &  %Fs)
Fayalite (mol%): 5; Ferrosilite (mol%): 2-6
Macroscopic Description - Cari Corrigan and Tim McCoy
The main mass of this meteorite has two distinct sides, one that is highly irregular and knobby, and one that is smooth and rounded. On one edge of the smooth surface is an area of pronounced iridescence. The entire meteorite is a rusty brown color with frequent to abundant rust haloes.
Thin Section Description (,2) - Cari Corrigan and Tim McCoy
The meteorite exhibits a medium octahedral pattern with kamacite lamellae of 1.5-1.8 mm width, with interstitial ribbons of taenite, comb plessite and schreibersite. Rare fusion crust is observed but α2 structure extends ~2 mm into the interior over parts of the section. Inclusions of olivine, pyroxene, plagioclase, troilite and graphite are present. The average composition based on a microprobe traverse of 100 points is 7.6 wt% Ni, 0.12 wt% P. Olivine compositions are Fa5, pyroxenes are bimodal, Fs3Wo45 and Fs6Wo1, and feldspars are An9-17Or4-6. The meteorite is likely a silicate-bearing IAB iron.
Antarctic Meteorite Images for Sample LAR 12059
Lab Photo of Sample LAR 12059 Displaying Bottom Orientation  Lab Photo of Sample LAR 12059 Displaying East Orientation  Lab Photo of Sample LAR 12059 Displaying North Orientation  Lab Photo of Sample LAR 12059 Displaying South Orientation 
Lab Photo of Sample LAR 12059 Displaying Top Orientation  Lab Photo of Sample LAR 12059 Displaying West Orientation  Thin Section Photo of Sample LAR 12059 in Reflected Light with 1.25X Magnification  Thin Section Photo of Sample LAR 12059 in Reflected Light with 2.5X Magnification 
Data from:
  MB104
  Table 0
  Line 0:
Date:2012
Mass (g):171.3
Pieces:1
Class:Iron, IAB complex
Fayalite (mol%):5
Ferrosilite (mol%):2-6
Classifier:SI
Type spec mass (g):171.3
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(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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