Meteoritical Bulletin: Entry for Larkman Nunatak 12279

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Larkman Nunatak 12279

Basic information

Name: Larkman Nunatak 12279
This is an OFFICIAL meteorite name.
Abbreviation: LAR 12279
Observed fall: No
Year found: 2012
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass: 76.9 g

Classification
history:

Antarctic Meteorite Newsletter:	AMN 40(1)	(2017)	EL6
Meteoritical Bulletin:	MB 106	(2018)	EL6
Recommended:			EL6 [explanation]

This is 1 of 133 approved meteorites classified as EL6. [show all]
Search for other: EL chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), and Enstatite-rich meteorites

Comments:

Approved 25 Feb 2017

Writeup

help

Writeup from AMN 40(1):

Sample Number

LAR 12279

Newsletter

40,1

Location

Larkman Nunatak

Field Number

23999

Dimensions

5.0 x 4.5 x 3.0

Weight

76.90

Original Classification

EL6 Chondrite

Mineral Composition (%Fa & %Fs)

Ferrosilite (mol%): 0-1

A/B

A

Macroscopic Description - Rachel Funk

The exterior of this meteorite is covered with dark brown fusion crust, some fractures and rust is visible. The interior is a dark matrix with metal and minor amounts of rust visible.

Thin Section Description (,2) - Cari Corrigan, Tim McCoy

Only vague traces of chondritic structure are visible in the thin section, which shows the meteorite to consist largely of prismatic or granular enstatite (grain size 0.1-0.2 mm), a considerable amount of nickel-iron, and minor amounts of sulfides and plagioclase. The meteorite is modestly weathered, with brown limonitic staining throughout the section. Microprobe analyses show that the enstatite is Fs_0-1; the Fe-Ni metal contains 1.0 wt. % Si. The meteorite is an EL6 chondrite.

Antarctic Meteorite Images for Sample LAR 12279

Lab Group Photo of Sample LAR 12279

Thin Section Photo of Sample LAR 12279 in Plane-Polarized Light with 2.5X Magnification

Thin Section Photo of Sample LAR 12279 in Reflected Light with 2.5X Magnification

Thin Section Photo of Sample LAR 12279 in Cross-Polarized Light with 2.5X Magnification

Thin Section Photo of Sample LAR 12279 in Plane-Polarized Light with 5X Magnification

Thin Section Photo of Sample LAR 12279 in Reflected Light with 5X Magnification

Thin Section Photo of Sample LAR 12279 in Cross-Polarized Light with 5X Magnification

Data from:
  MB106
  Table 0
  Line 0:

Date:	2012
Mass (g):	76.9
Pieces:	1
Class:	EL6
Weathering grade:	A/B
Ferrosilite (mol%):	0-1
Classifier:	SI
Type spec mass (g):	76.9
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 40(1) (2017), JSC, Houston
Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.

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Geography:

Antarctica

Antarctica

Coordinates:

Unknown.

Statistics:
This is 1 of 44543 approved meteorites from Antarctica (plus 3802 unapproved names)

Also see:

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Revision
history:

This lists important revisions made to data for this record.

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