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LaPaz Icefield 031381
Basic information Name: LaPaz Icefield 031381
     This is an OFFICIAL meteorite name.
Abbreviation: LAP 031381
Observed fall: No
Year found: 2003
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 1.89 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 27(3)  (2004)  Diogenite-olivine
Meteoritical Bulletin:  MB 89  (2005)  Diogenite-olivine
MetBase:  v. 7.1  (2006)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 421 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Writeuphelp
Writeup from AMN 27(3):
Sample No.: LAP 03979; LAP 031381
Location: LaPaz Icefield
Field No.: 16489; 16628
Dimensions (cm):   1.5x1.25x0.75
1.5x1.25x0.75
Weight (g): 2.406; 1.890
Meteorite Type: Diogenite (Olivine)
   
LAP03979 LAP03979
LAP031381 LAP031381

Macroscopic Description: Kathleen McBride
95% of the exterior is covered with brown/black fusion crust with small shiny patches. The rusty, granular interior has mm sized black inclusions and green mineral grains that are up to 2 mm in size.

Thin Section (,2) Description: Tim McCoy, Linda Welzenbach
These two small sections are unbrecciated rocks dominated by orthopyroxene (Fs25Wo3), olivine (Fa30) and plagioclase (An80-85Or1). Most grains are less than 0.5 mm in diameter, although a single pyroxene in 031381 reaches 4 mm. The meteorites are unbrecciated olivine diogenites.

LAP 03979 - Cross-Polarized Light LAP 03979 - Plane-Polarized Light LAP 031381 - Cross-Polarized Light
LAP 03979
Cross-Polarized Light
LAP 03979
Plane-Polarized Light
LAP 031381
Cross-Polarized Light
LAP 031381 - Plane-Polarized Light LAP 031381 - Cross-Polarized Light LAP 031381 - Plane-Polarized Light
LAP 031381
Plane-Polarized Light
LAP 031381
Cross-Polarized Light
LAP 031381
Plane-Polarized Light

Data from:
  MB89
  Table A1
  Line 231:
Mass (g):1.89
Class:Dio/Ol
Weathering grade:B
Fayalite (mol%):30
Ferrosilite (mol%):25
Catalogs:
Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 27(3) (2004), JSC, Houston
Published in Meteoritical Bulletin, no. 89, MAPS 40, A201-A263 (2005)
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Photos:
CreditPhotos
Photographs from AMN:
Photograph from unknown source A photo is in the write-up above
Photos from the Encyclopedia of Meteorites:
Dr Carlton Allen, JSC-KT, NASA      
Geography:

Antarctica
Coordinates:
     Recommended::   (86° 22'S, 70° 0'W)

Statistics:
     This is 1 of 38674 approved meteorites from Antarctica (plus 5051 unapproved names)
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