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Larkman Nunatak 06686
Basic information Name: Larkman Nunatak 06686
     This is an OFFICIAL meteorite name.
Abbreviation: LAR 06686
Observed fall: No
Year found: 2006
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 21.9 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 32(2)  (2009)  CM2
Meteoritical Bulletin:  MB 98  (2010)  CM2
Recommended:  CM2    [explanation]

This is 1 of 541 approved meteorites classified as CM2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites
Comments: Approved 4 Sep 2009
Writeuphelp
Writeup from AMN 32(2):
Sample Number LAR 06686
Pairing
Newsletter 32,2
Location Larkman Nunatak
Field Number 19538
Dimensions 3.0 x 3.0 x 1.5
Weight 21.89
Original Classification CM2 Chondrite
Macroscopic Description - Kathleen McBride
The exterior has thick black patches with polygonal fractures. The interior is a charcoal black with a brown oxidation rind. Some mm sized chondrules are visible.
Thin Section (,2) Description - Cari Corrigan, Tim McCoy and Linda Welzenbach
The section consists of minimally-altered, abundant, small chondrules (up to 0.5 mm), mineral grains and CAIs set in a hydrated matrix; minor metal and sulfide grains are present. Olivine compositions are Fa0-45, with a peak at Fa0-1, orthopyroxene is Fs0-3. The meteorite is a CM2 chondrite.
Antarctic Meteorite Images for Sample LAR 06686
LAR 06686 Meteorite Sample Photograph Showing North View  LAR 06686 Meteorite Thin Section Photo with 2.5x magnification in Plane-Polarized Light  LAR 06686 Meteorite Thin Section Photo with 2.5x magnification in Cross-Polarized Light  LAR 06686 Meteorite Thin Section Photo with 5x magnification in Plane-Polarized Light 
LAR 06686 Meteorite Thin Section Photo with 5x magnification in Cross-Polarized Light 
Data from:
  MB98
  Table 2
  Line 173:
Mass (g):21.9
Class:CM2
Weathering grade:B/C
Fayalite (mol%): 0-45
Ferrosilite (mol%): 0-1
Classifier:SI
Type spec location:JSC, SI
Main mass:JSC
Comments:Fracturing A/B
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 32(2) (2009), JSC, Houston
Published in Meteoritical Bulletin, no. 98, MAPS 45, 1530-1551 (2010)
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Geography:

Antarctica
Coordinates:Unknown.

Statistics:
     This is 1 of 40129 approved meteorites from Antarctica (plus 4494 unapproved names)

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