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LaPaz Icefield 03781
Basic information Name: LaPaz Icefield 03781
     This is an OFFICIAL meteorite name.
Abbreviation: LAP 03781
Observed fall: No
Year found: 2003
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 35 g
Antarctic Meteorite Newsletter:  AMN 29(2)  (2006)  Diogenite
Meteoritical Bulletin:  MB 92  (2007)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 497 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 1 Sep 2006
Writeup from AMN 29(2):
Sample No.: LAP 03781; LAP 03796; LAP 031000; LAP 031309; LAP 04836; LAP 04837; LAP 04839
Location: LaPaz Ice Field
Field No.: 16027; 16383; 16254; 16962; 16911; 16384; 16375
Dimensions (cm):   4.5x2.0x2.5; 3.0x2.0x2.0; 3.0x2.75x2.0; 3.0x2.0x2.0; 7.0x4.5x4.5; 9.0x6.5x5.0; 9.5x6.0x5.5
Weight (g): 35.004; 16.525; 27.874; 14.062; 263.100; 542.000; 569.400
Meteorite Type: Diogenite

Macroscopic Description: Kathleen McBride
The exterior of these diogenites has chocolate brown patches of fusion crust. The exposed interior has a rough texture and light green to white clasts. The interior is a light matrix, stained in areas with a washed out rusty color. Green clasts ranging in size from < 2 mm are visible.

Thin Section (,2) Description: Valerie Reynolds and Tim McCoy
The sections show a groundmass of coarse (up to 1.5 mm) comminuted pyroxene of composition of Fs23Wo2. The meteorites are diogenites and are compositionally similar to LAP 91900, with which they may be paired.

Thin Section Images

Light LAP 03781
Plane-Polarized Light
LAP 03781
Cross-Polarized Light
LAP 03796
Plane-Polarized Light
LAP 03796
LAP 03781 - Cross-Polarized Light LAP 03781 - Plane-Polarized Light
<a href=LAP 03796 - Cross-Polarized Light"> <a href=LAP 03796 - Plane-Polarized Light">
Light LAP 031000
Plane-Polarized Light
LAP 031000
Cross-Polarized Light
LAP 031309
Plane-Polarized Light
LAP 031309
<a href=LAP 031000 - Cross-Polarized Light"> <a href=LAP 031000 - Plane-Polarized Light">
<a href=LAP 031309 - Cross-Polarized Light"> <a href=LAP 031309 - Plane-Polarized Light">
Cross-Polarized Light
LAP 04836
Plane-Polarized Light
LAP 04836
Cross-Polarized Light
LAP 04837
Plane-Polarized Light
LAP 04837
<a href=LAP 04836 - Cross-Polarized Light"> <a href=LAP 04836 - Plane-Polarized Light">
<a href=LAP 04837 - Cross-Polarized Light"> <a href=LAP 04837 - Plane-Polarized Light">
Light LAP 04839
Light LAP 04839
<a href=LAP 04839 - Cross-Polarized Light"> <a href=LAP 04839 - Plane-Polarized Light">

Lab Images

LAP 03781,0 and ,1 Image Interior
LAP 03781 and 031000 Image North
LAP 03781 and 031000 Image North
<a href=LAP 03796,0 and ,1 Image Interior" border="0">
<a href=LAP 031309,0 and ,1 Image Interior" border="0">
LAP 031308 and 031309 Image North
<a href=LAP 04836,0 ,1 ,2 Image P" border="0">
<a href=LAP 04837,0 ,1 ,2 Image Interior" border="0">
<a href=LAP 04837,0 ,1 ,2 Image Interior" border="0">

Data from:
  Table 3
  Line 261:
Mass (g):35
Weathering grade:B
Fayalite (mol%):22
Ferrosilite (mol%):2
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 43352 approved meteorites from Antarctica (plus 3802 unapproved names)

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