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Larkman Nunatak 12325
Basic information Name: Larkman Nunatak 12325
     This is an OFFICIAL meteorite name.
Abbreviation: LAR 12325
Observed fall: No
Year found: 2012
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 264 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 36(2)  (2013)  LL-imp melt
Meteoritical Bulletin:  MB 102  (2013)  LL-imp melt
Recommended:  LL-imp melt    [explanation]

This is 1 of 4 approved meteorites classified as LL-imp melt.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 30 Aug 2013
Writeuphelp
Writeup from AMN 36(2):
Sample Number LAR 12325
Newsletter 36,2
Location Larkman Nunatak
Field Number 23967
Dimensions 7.4 x 6.0 x 3.0
Weight 263.90
Original Classification LL Chondrite (Impact Melt)
Mineral Composition (%Fa &  %Fs)
Fayalite (mol%): 29; Ferrosilite (mol%): 9-23
Weathering
B
Fracturing
A/B
Macroscopic Description - Cecilia Satterwhite
The rough, uneven exterior is black in color. Some of the smoother areas are lighter or more grayish in color than the rougher areas. Very small patches of rough, black fusion crust are present. The interior matrix is dark gray with heavily weathered rusty areas and visible metal grains.
Thin Section Description (,2) - Cari Corrigan and Linda Welzenbach
The section consists dominantly of clasts with a fine-grained, melt-textured matrix of olivine and pyroxene (1-10 microns) with irregular blebs of metal, sulfide and fragments of mineral grains (200-300 micron grain size.) Clasts exhibit shock effects. Clasts of this texture exist throughout the section, with melt veins in between. One large sulfide bleb is about 2.5 mm. The mineral compositions are homogenous; olivine is Fa29 and pyroxene is Fs23. The meteorite is an impact melt breccia of an LL chondrite precursor.
Antarctic Meteorite Images for Sample LAR 12325
Thin Section Photograph of Sample LAR 12325 in Plane-Polarized Light  Thin Section Photograph of Sample LAR 12325 in Reflected Light  Thin Section Photograph of Sample LAR 12325 in Cross-Polarized Light  Thin Section Photograph of Sample LAR 12325 in Plane-Polarized Light 
Thin Section Photograph of Sample LAR 12325 in Reflected Light  Thin Section Photograph of Sample LAR 12325 in Cross-Polarized Light  Pie Shot View of Sample LAR 12325  Top View of Sample LAR 12325 
East View of Sample LAR 12325  Bottom View of Sample LAR 12325  North View of Sample LAR 12325  Post Processing View of Sample LAR 12325 
West View of Sample LAR 12325  South View of Sample LAR 12325 
Data from:
  MB102
  Table 0
  Line 0:
Date:2012
Mass (g):263.9
Pieces:1
Class:LL-imp melt
Weathering grade:B
Fayalite (mol%):29
Ferrosilite (mol%):9-23
Classifier:SI
Type spec mass (g):263.9
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:
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Geography:

Antarctica
Coordinates:Unknown.

Statistics:
     This is 1 of 44547 approved meteorites from Antarctica (plus 3802 unapproved names)
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Revision
  history:
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