header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 21 Sep 2019
Search for: Search type: Search limits: Display: Publication:
Names
Text help
Places
Classes
Years
Contains
Starts with
Exact
Sounds like
NonAntarctic
Falls  Non-NWAs
What's new
  in the last:
Include past classifications in search
Limit to approved meteorite names
Search text:  
Larkman Nunatak 06870
Basic information Name: Larkman Nunatak 06870
     This is an OFFICIAL meteorite name.
Abbreviation: LAR 06870
Observed fall: No
Year found: 2006
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 15.4 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 30(2)  (2007)  Eucrite-br
Recommended:  Eucrite-br    [explanation]

This is 1 of 164 approved meteorites classified as Eucrite-br.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 31 Aug 2007
Writeuphelp
Writeup from AMN 30(2):
Sample No.: LAR 06870
Location: Larkman Nunatak
Field No.: 19944
Dimensions (cm):   2.5 x 1.75 x 2.0
Weight (g): 15.43
Meteorite Type:

Eucrite (Brecciated)



Macroscopic Description: Kathleen McBride
95% black fusion crust covers the exterior, which is dull on one surface and shiny on the other. The interior is a gray and white matrix with a powdery texture.

Thin Section (,2) Description: Tim McCoy and Linda Welzenbach
The meteorite is a breccia that has been metamorphosed and shocked. Basaltic clasts measuring from 0.5-4 mm vary widely in texture and grain size (0.1-1 mm), reflecting their variable cooling histories, and boundaries between clasts and matrix have been largely obscured by later metamorphism. Pyroxenes are exsolved and pervasive shock effects include mosaicism in pyroxene. Mineral compositions are nearly homogeneous with orthopyroxene (Fs60Wo2), augite (Fs30Wo39), and plagioclase (An78-86Or1). The Fe/Mn ratio of the pyroxene is ~30. The meteorite is a brecciated eucrite.



Thin Section Images

Plane-Polarized Light
LAR 06870
Cross Polarized Light
LAR 06870
LAR06870 - Plane-Polarized LightLAR06870 - Plane-Polarized Light LAR06870 - Cross Polarized LightLAR06870 - Cross Polarized Light



Lab Images

LAR 06870

Catalogs:
Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 30(2) (2007), JSC, Houston
Published in Meteoritical Bulletin, no. 94, MAPS 43, 1551-1588 (2008)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photographs from AMN:
JSC A photo is in the write-up above
Geography:

Antarctica
Coordinates:Unknown.

Statistics:
     This is 1 of 39173 approved meteorites from Antarctica (plus 5051 unapproved names)

Direct link to this page