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Larkman Nunatak 12249
Basic information Name: Larkman Nunatak 12249
     This is an OFFICIAL meteorite name.
Abbreviation: LAR 12249
Observed fall: No
Year found: 2012
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 80.1 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 36(2)  (2013)  Howardite
Meteoritical Bulletin:  MB 102  (2013)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 383 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 30 Aug 2013
Writeuphelp
Writeup from AMN 36(2):
Sample Number LAR 12249
Newsletter 36,2
Location Larkman Nunatak
Field Number 23958
Dimensions 5.0 x 5.0 x 2.5
Weight 80.07
Original Classification Howardite
Mineral Composition (%Fa &  %Fs)
Ferrosilite (mol%): 20-56
Weathering
A/B
Fracturing
A/B
Macroscopic Description - Cecilia Satterwhite
30% of the rough textured exterior has pitted, black fractured fusion crust. Exposed areas without fusion crust are gray in color with light and weathered inclusions. The coarse grained, gray interior has numerous light, dark and weathered inclusions. Some oxidation is present.
Thin Section Description (,2) - Cari Corrigan and Linda Welzenbach
The section shows a groundmass of comminuted pyroxene and plagioclase (up to 0.5 mm) with fine- to coarse-grained basaltic and diogenitic clasts ranging up to 5 mm. Pyroxene compositions range from Fs20-56Wo1-45. Fe/Mn is 27-32. The meteorite is a howardite.
Antarctic Meteorite Images for Sample LAR 12249
Thin Section Photograph of Sample LAR 12249 in Plane-Polarized Light  Thin Section Photograph of Sample LAR 12249 in Reflected Light  Thin Section Photograph of Sample LAR 12249 in Cross-Polarized Light  Thin Section Photograph of Sample LAR 12249 in Plane-Polarized Light 
Thin Section Photograph of Sample LAR 12249 in Reflected Light  Thin Section Photograph of Sample LAR 12249 in Cross-Polarized Light  West View of Sample LAR 12249  Interior View of Sample LAR 12249 
Top View of Sample LAR 12249  Splits View of Sample LAR 12249  Bottom View of Sample LAR 12249  North View of Sample LAR 12249 
South View of Sample LAR 12249 
Data from:
  MB102
  Table 0
  Line 0:
Date:2012
Mass (g):80.1
Pieces:1
Class:Howardite
Weathering grade:A/B
Ferrosilite (mol%):20-56
Classifier:SI
Type spec mass (g):80.1
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:
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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