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Larkman Nunatak 12246
Basic information Name: Larkman Nunatak 12246
     This is an OFFICIAL meteorite name.
Abbreviation: LAR 12246
Observed fall: No
Year found: 2012
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 22.1 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 36(2)  (2013)  CO3
Meteoritical Bulletin:  MB 102  (2013)  CO3
Recommended:  CO3    [explanation]

This is 1 of 554 approved meteorites (plus 1 unapproved name) classified as CO3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 30 Aug 2013
Writeuphelp
Writeup from AMN 36(2):
Sample Number LAR 12246
Newsletter 36,2
Location Larkman Nunatak
Field Number 23935
Dimensions 3.5 x 3.0 x 2.0
Weight 22.15
Original Classification CO3 chondrite
Mineral Composition (%Fa &  %Fs)
Fayalite (mol%): 0-50; Ferrosilite (mol%): 1
Weathering
A/B
Fracturing
B/C
Macroscopic Description - Cecilia Satterwhite
This heavily fractured carbonaceous chondrite has black fusion crust on the exterior with some frothy areas. Exposed surfaces are weathered. The dark gray to black interior has abundant small white and rusty inclusion/chondrules. Some areas are heavy oxidized and rusty.
Thin Section Description (,2) - Cari Corrigan and Linda Welzenbach
The section consists of abundant small (up to 1 mm) chondrules, chondrule fragments and mineral grains in a dark matrix. Metal and sulfide occur in the matrix. Olivine ranges in composition from Fa0-50. One pyroxene analyses shows Fs1Wo3. The matrix appears to consist largely of Fe-rich olivine. The meteorite is a CO3 chondrite.
Antarctic Meteorite Images for Sample LAR 12246
Thin Section Photograph of Sample LAR 12246 in Plane-Polarized Light  Thin Section Photograph of Sample LAR 12246 in Reflected Light  Thin Section Photograph of Sample LAR 12246 in Cross-Polarized Light  Thin Section Photograph of Sample LAR 12246 in Plane-Polarized Light 
Thin Section Photograph of Sample LAR 12246 in Reflected Light  Thin Section Photograph of Sample LAR 12246 in Cross-Polarized Light  East View of Sample LAR 12246  North View of Sample LAR 12246 
Top View of Sample LAR 12246  South View of Sample LAR 12246  West View of Sample LAR 12246  Splits View of Sample LAR 12246 
Bottom View of Sample LAR 12246 
Data from:
  MB102
  Table 0
  Line 0:
Date:2012
Mass (g):22.1
Pieces:1
Class:CO3
Weathering grade:A/B
Fayalite (mol%):0-50
Ferrosilite (mol%):1
Classifier:SI
Type spec mass (g):22.1
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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