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Larkman Nunatak 06507
Basic information Name: Larkman Nunatak 06507
     This is an OFFICIAL meteorite name.
Abbreviation: LAR 06507
Observed fall: No
Year found: 2006
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 12.1 g
Antarctic Meteorite Newsletter:  AMN 33(1)  (2010)  LL-imp melt
Meteoritical Bulletin:  MB 98  (2010)  LL-impact melt
MB 104  (2015)  CK6
Antarctic Meteorite Newsletter:  AMN 39(1)  (2016)  CK6
Recommended:  CK6    [explanation]

This is 1 of 82 approved meteorites classified as CK6.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Comments: Approved 11 Feb 2010
Revised 27 Feb 2016: Reclassified in AMN 39(1)
Writeup from AMN 33(1):
Sample Number LAR 06507
Newsletter 33,1
Location Larkman Nunataks
Field Number 19639
Dimensions 2.5 x 1.5 x 1.5
Weight 12.054
Original Classification LL Chondrite (Impact Melt Breccia)
Macroscopic Description - Kathleen McBride
The exterior has a thick patch of fusion crust covering <5% of the surface. The interior is gray in color with an oxidation rind, evaporites and is low in metal. Millimeter sized gray chondrules are present.
Thin Section (,2) Description - Cari Corrigan
This section consists of a matrix of individual mineral fragments up to 100 microns in a melt-textured matrix with rounded to ellipsoidal metal-sulfide blebs. It also exhibits larger (up to several mm) unmelted chondritic fragments with rare relict barred olivine chondrules. Olivine is Fa34, pyroxene is Fs11. This meteorite is an LL chondrite impact melt breccia.
Antarctic Meteorite Images for Sample LAR 06507
LAR06507_2.5PPL.jpg  LAR06507_2.5PPL_LLIM.jpg  LAR06507_2.5XN_LLIM.jpg 

Writeup from AMN 39(1):
LAR 06507, reclassification

LAR 06507 was classified as an LL impact melt breccia in the Antarctic Meteorite Newsletter vol. 33 No. 1 (February 2010). More detailed information has led to a better understanding of this sample, which we here re-classify to shocked CK6 chondrite, based on a) the abundance of magnetite, the near absence of metal, equilibrated olivine fayalite content of 31±3, and Ni-rich olivine. Additional information can be found in meet-ing abstracts:

K. Righter, R. Harrington, C. Schroeder, and R. V. Morris (2013) Non-Destructive Classification Approaches for Equilibrated Ordinary Chondrites. 76th Annual Meeting of the Meteoritical Society, Abstract #5232.

M. Schmieder, B. J. Shaulis, and D. A. Kring (2016) Larkman Nunatak 06507 — Insights into the Impact Melting of Carbonaceous Chondrites. 47th Lunar and Planetary Science Conference, Abstract #1646.
Data from:
  Table 2
  Line 131:
Mass (g):12.1
Class:LL-impact melt
Weathering grade:Be
Fayalite (mol%):34
Ferrosilite (mol%):11
Type spec location:JSC, SI
Main mass:JSC
Comments:Fracturing B
   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)
Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 33(1) (2010), JSC, Houston
Published in Antarctic Meteorite Newsletter 39(1) (2016), JSC, Houston
Published in Meteoritical Bulletin, no. 98, MAPS 45, 1530-1551 (2010)
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     This is 1 of 44248 approved meteorites from Antarctica (plus 3802 unapproved names)

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