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Larkman Nunatak 12095
Basic information Name: Larkman Nunatak 12095
     This is an OFFICIAL meteorite name.
Abbreviation: LAR 12095
Observed fall: No
Year found: 2012
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 133.1 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 36(2)  (2013)  Martian (shergottite)
Meteoritical Bulletin:  MB 102  (2013)  Martian (shergottite)
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 195 approved meteorites (plus 1 unapproved name) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 30 Aug 2013
Writeuphelp
Writeup from AMN 36(2):
Sample Number LAR 12095
Newsletter 36,2
Location Larkman Nunatak
Field Number 22629
Dimensions 5.5 x 3.8 x 3.4
Weight 133.13
Original Classification Shergottite
Pairing LAR 12095; LAR 12240
Mineral Composition (%Fa &  %Fs)
Fayalite (mol%): 31-42; Ferrosilite (mol%): 26-31
Weathering
A/Be
Fracturing
A/B
Macroscopic Description - Cecilia Satterwhite
The exteriors are a rough, fractured texture with brown/black fusion crust and some evaporites. Areas without fusion crust show tan matrix with some olivine grains. The interiors are greyish tan with abundant green mineral grains and some darker grains visible. Minor oxidation is present.
Thin Section Description (,2) - Cari Corrigan and Linda Welzenbach
These meteorites are similar enough that one description will suffice. Each section is composed of a coarse-grained assemblage of pyroxene, olivine and maskelynite. Olivine occurs as phenocrysts with grain sizes up to 3 mm. Olivines have a brown staining probably due to shock. Pyroxene and maskelynite in the matrix are finer grained, typically reaching 0.5 mm. Sulfides and oxides are present, as is one shock melt vein in each section. Olivine is Fa28-42; pyroxenes exhibit a range of compositions from pigeonite to subcalcic augite (Fs25-31Wo8-18; Fe/Mn27-32); feldspar is intermediate in composition (An54-64Or0-1). These meteorites are olivine-phyric shergottites.
Antarctic Meteorite Images for Sample LAR 12095
Thin Section Photograph of Sample LAR 12095 in Plane-Polarized Light  Thin Section Photograph of Sample LAR 12095 in Reflected Light  Thin Section Photograph of Sample LAR 12095 in Cross-Polarized Light  Thin Section Photograph of Sample LAR 12095 in Plane-Polarized Light 
Thin Section Photograph of Sample LAR 12095 in Reflected Light  Thin Section Photograph of Sample LAR 12095 in Cross-Polarized Light  South View of Sample LAR 12095  Pie Shot View of Sample LAR 12095 
Top View of Sample LAR 12095  East View of Sample LAR 12095  Splits View of Sample LAR 12095  North View of Sample LAR 12095 
West View of Sample LAR 12095  Bottom View of Sample LAR 12095 
Data from:
  MB102
  Table 0
  Line 0:
Date:2012
Mass (g):133.1
Pieces:1
Class:Martian (shergottite)
Weathering grade:A/Be
Fayalite (mol%):31-42
Ferrosilite (mol%):26-31
Classifier:SI
Type spec mass (g):133.1
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:
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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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