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LaPaz Icefield 031190
Basic information Name: LaPaz Icefield 031190
     This is an OFFICIAL meteorite name.
Abbreviation: LAP 031190
Observed fall: No
Year found: 2003
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 4.7 g
Antarctic Meteorite Newsletter:  AMN 29(2)  (2006)  Eucrite-br
Meteoritical Bulletin:  MB 92  (2007)  Eucrite-br
Recommended:  Eucrite-br    [explanation]

This is 1 of 218 approved meteorites classified as Eucrite-br.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 1 Sep 2006
Writeup from AMN 29(2):
Sample No.: LAP 031190; LAP 031379
Location: LaPaz Ice Field
Field No.: 16611; 16598
Dimensions (cm):   2.5x1.5x1.0; 2.0x1.5x1.25
Weight (g): 4.733; 4.335
Meteorite Type: Eucrite (Brecciated)

Macroscopic Description: Kathleen McBride
The exterior surface has black/brown fusion crust, shiny on some surfaces, dull on others. The exterior is a gray matrix with little rust and dark gray and white angular clasts.

Thin Section (,2) Description: Tim McCoy and Valerie Reynolds
These meteorites are so similar that a single description suffices. The meteorites are dominated by fine-grained (~200 micron average grain size) basaltic material with patches of interlocking euhedral plagioclase crystals up to 1 mm and basaltic clasts up to 1 mm. Weathering is moderate. Mineral compositions are homogeneous with orthopyroxene (Fs56Wo3), with lamellae of augite (Fs25Wo43), and plagioclase (An89Or0.5). The Fe/Mn ratio of the pyroxene is ~29. The meteorites are brecciated eucrites.

Thin Section Images

Cross-Polarized Light
LAP 031190
Plane-Polarized Light
LAP 031190
Cross-Polarized Light
LAP 031379
Plane-Polarized Light
LAP 031379
LAP 031190 - Cross-Polarized Light LAP 031190 - Plane-Polarized Light <a href=LAP 031379 - Cross-Polarized Light"> <a href=LAP 031379 - Plane-Polarized Light">

Lab Images

LAP 031190 Image North
<a href=LAP 031379 Image North" border="0">

Data from:
  Table 3
  Line 358:
Mass (g):4.7
Weathering grade:A
Ferrosilite (mol%):25-57
Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 29(2) (2006), JSC, Houston
Published in Meteoritical Bulletin, no. 92, MAPS 42, 1647-1694 (2007)
Find references in NASA ADS:
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Photographs from AMN:
JSC A photo is in the write-up above


     This is 1 of 43700 approved meteorites from Antarctica (plus 3802 unapproved names)

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