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Larkman Nunatak 12326
Basic information Name: Larkman Nunatak 12326
     This is an OFFICIAL meteorite name.
Abbreviation: LAR 12326
Observed fall: No
Year found: 2012
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 10.45 kg
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 36(2)  (2013)  Howardite
Meteoritical Bulletin:  MB 102  (2013)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 446 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 12326
Newsletter 36,2
Location Larkman Nunatak
Field Number 23915
Dimensions 25.0 x 20.0 x 15.0
Weight 10445.00
Original Classification Howardite
Mineral Composition (%Fa &  %Fs)
Ferrosilite (mol%): 32-52
Weathering
B
Fracturing
B
Macroscopic Description - Kathleen McBride
The exterior of this breccia has a coarse to fined grained texture with multiple types of clasts, ranging in color from white to dark gray. Approximately 40% of the exterior surface has brown/black fusion crust and visible shock veins. The interior looks the same as the exterior but is less weathered.
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 coarse-grained diogenitic clasts up to 5 mm. Groundmass is heavily shocked. Orthopyroxene compositions range from Fs32-52Wo2-25. No olivine grains were found. This section is from a large, very brecciated howardite and this description may not be representative of the whole (since compositions here are essentially eucritic).
Antarctic Meteorite Images for Sample LAR 12326
Thin Section Photograph of Sample LAR 12326 in Plane-Polarized Light  Thin Section Photograph of Sample LAR 12326 in Reflected Light  Thin Section Photograph of Sample LAR 12326 in Cross-Polarized Light  Thin Section Photograph of Sample LAR 12326 in Plane-Polarized Light 
Thin Section Photograph of Sample LAR 12326 in Reflected Light  Thin Section Photograph of Sample LAR 12326 in Cross-Polarized Light  South View of Sample LAR 12326  West View of Sample LAR 12326 
North View of Sample LAR 12326  Splits View of Sample LAR 12326  East View of Sample LAR 12326  Bottom View of Sample LAR 12326 
Interior View of Sample LAR 12326  Top View of Sample LAR 12326 
Data from:
  MB102
  Table 0
  Line 0:
Date:2012
Mass (g):10445
Pieces:1
Class:Howardite
Weathering grade:B
Ferrosilite (mol%):32-52
Classifier:SI
Type spec mass (g):10445
Type spec location:JSC
Main mass:JSC
Finder:ANSMET
Comments:Submitted by AMN
Institutions
   and collections		 JSC: Mailcode XI, 2101 NASA Parkway, NASA Johnson Space Center, Houston, TX 77058, United States; Website (institutional address; updated 28 Jul 2022)
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 43857 approved meteorites from Antarctica (plus 3802 unapproved names)

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