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Larkman Nunatak 12010
Basic information Name: Larkman Nunatak 12010
     This is an OFFICIAL meteorite name.
Abbreviation: LAR 12010
Observed fall: No
Year found: 2012
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 410 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 36(2)  (2013)  Diogenite
Meteoritical Bulletin:  MB 102  (2013)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 439 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 30 Aug 2013
Writeuphelp
Writeup from AMN 36(2):
Sample Number LAR 12010
Newsletter 36,2
Location Larkman Nunatak
Field Number 23955
Dimensions 7.5 x 5.0 x 5.0
Weight 409.63
Original Classification Diogenite
Mineral Composition (%Fa &  %Fs)
Ferrosilite (mol%): 25
Weathering
B/C
Fracturing
A/B
Macroscopic Description - Kathleen McBride
50% of the exterior is a patchy, dark brown fusion crust exhibiting polygonal fractures. The matrix is yellow in color and has visible olivine crystals.
Thin Section Description (,2) - Cari Corrigan and Linda Welzenbach
This heavily weathered section shows a groundmass of coarse (generally 200 microns, with larger clasts up to 2 mm) comminuted pyroxene, with minor plagioclase and SiO2. Orthopyroxene has a composition of Fs25Wo2-3 and plagioclase is An87-90Or0-3. The Fe/Mn ratio of the pyroxene is ~28-32. The meteorite is a brecciated diogenite.
Antarctic Meteorite Images for Sample LAR 12010
Thin Section Photograph of Sample LAR 12010 in Plane-Polarized Light  Thin Section Photograph of Sample LAR 12010 in Reflected Light  Thin Section Photograph of Sample LAR 12010 in Cross-Polarized Light  Thin Section Photograph of Sample LAR 12010 in Plane-Polarized Light 
Thin Section Photograph of Sample LAR 12010 in Reflected Light  Thin Section Photograph of Sample LAR 12010 in Cross-Polarized Light  South View of Sample LAR 12010  East View of Sample LAR 12010 
Pie Shot View of Sample LAR 12010  West View of Sample LAR 12010  North View of Sample LAR 12010  Top View of Sample LAR 12010 
Data from:
  MB102
  Table 0
  Line 0:
Date:2012
Mass (g):409.6
Pieces:1
Class:Diogenite
Weathering grade:B/C
Ferrosilite (mol%):25
Classifier:SI
Type spec mass (g):409.6
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 36(2) (2013), JSC, Houston
Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Antarctica
Coordinates:Unknown.

Statistics:
     This is 1 of 40129 approved meteorites from Antarctica (plus 4494 unapproved names)

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