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LaPaz Icefield 03721
Basic information Name: LaPaz Icefield 03721
     This is an OFFICIAL meteorite name.
Abbreviation: LAP 03721
Observed fall: No
Year found: 2003
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 87.5 g
Antarctic Meteorite Newsletter:  AMN 29(2)  (2006)  Ureilite
Meteoritical Bulletin:  MB 92  (2007)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 630 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 1 Sep 2006
Writeup from AMN 29(2):
Sample No.: LAP 03721; LAP 03722; LAP 031109
Location: LaPaz Ice Field
Field No.: 16503; 16770; 16890
Dimensions (cm):   4.5x3.5x3.0; 3.5x2.5x2.5; 2.1x1.5x1.2
Weight (g): 87.495; 29.550; 14.5
Meteorite Type: Ureilite

Macroscopic Description: Kathleen McBride and Cecilia Satterwhite
The exteriors have dark brown fusion crust exhibiting polygonal fractures and a few iridescent halos. Areas lacking fusion crust reveal a weathered brown interior. The interiors are hard but friable and revealed a dark gray matrix. Shiny grains with no apparent cleavage planes and translucent minerals with a slight yellow tint and opaque white to light gray grains are visible.

Thin Section (,2) Description: Valerie Reynolds, Tim McCoy and Linda Welzenbach
These sections are similar and almost certainly paired with LAP 03587, which was described as follows: The section consists of an aggregate of large olivine and pyroxene grains up to 2 mm across. Individual olivine grains are rimmed by carbon-rich material containing traces of metal. Shock effects in olivine are minor; pyroxenes exhibit mosaicism. Olivine has cores of Fa25, and rims of Fa10. Pigeonite is Fs14-20,Wo8-10. The meteorite is a ureilite.

Thin Section Images

Cross-Polarized Light
LAP 03721
Plane-Polarized Light
LAP 03721
Cross-Polarized Light
LAP 03722
Light LAP 03722
LAP 03721 - Cross-Polarized Light LAP 03721 - Plane-Polarized Light <a href=LAP 03722 - Cross-Polarized Light"> <a href=LAP 03722 - Plane-Polarized Light">
Cross-Polarized Light
LAP 03722
Light LAP 031109
Light LAP 031109
<a href=LAP 03722 - Cross-Polarized Light"> <a href=LAP 031109 - Cross-Polarized Light"> <a href=LAP 031109 - Plane-Polarized Light">

Lab Images

LAP 03721 and <a href=LAP 03722 Image North" border="0">
<a href=LAP 031109 Image" border="0">

Data from:
  Table 3
  Line 202:
Mass (g):87.5
Weathering grade:B
Fayalite (mol%):9-25
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:
Find references in Google Scholar:
Photographs from AMN:
JSC A photo is in the write-up above


     This is 1 of 43856 approved meteorites from Antarctica (plus 3802 unapproved names)

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