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LaPaz Icefield 02205
Basic information Name: LaPaz Icefield 02205
     This is an OFFICIAL meteorite name.
Abbreviation: LAP 02205
Observed fall: No
Year found: 2002
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 1226 g
Antarctic Meteorite Newsletter:  AMN 26(2)  (2003)  Lunar (basalt)
Meteoritical Bulletin:  MB 88  (2004)  Lunar-basaltic
MetBase:  v. 7.1  (2006)  Lunar (basalt)
Recommended:  Lunar (basalt)    [explanation]

This is 1 of 28 approved meteorites classified as Lunar (basalt).   [show all]
Search for other: Lunar meteorites
Writeup from AMN 26(2):
Sample No.: LAP 02205
Location: LaPaz Ice Field
Field No.: 15503
Dimensions (cm):   10.0x8.5x5.5
Weight (g): 1226.300
Meteorite Type: Lunar-Basalt

Macroscopic Description: Kathleen McBride
95% of the exterior surface has black fusion crust. Small areas of material have been plucked out. The fusion crust exhibits a slight ropy texture with polygonal fractures. The interior consists of interlocking tan and white coarse-grained minerals. There are numerous criss-crossing fractures filled with black glass.

Thin Section (,6) Description: Tim McCoy, Linda Welzenbach
The section consists of coarse-grained unbrecciated basalt with elongate pyroxene (up to 0.5 mm) and plagioclase laths (up to 1 mm) (~60:40 px:plag), rare phenocrysts of olivine (up to 1 mm) and interstitial oxides and late-stage mesostasis. Shock effects include undulatory extinction in pyroxene and shock melt veins and pockets. Microprobe analyses reveal pigeonite to augite of Fs26-80Wo14-36, plagioclase is An85-90Or0-1 and a single olivine phenocryst is Fa50. The Fe/Mn ratio in the pyroxenes averages ~60. The meteorite is a lunar olivine-bearing basalt.

Oxygen Isotope Analysis: T.K. Mayeda and R.N. Clayton
Our analysis for LAP 02205 gives: δ 18 O = +5.6 and δ 17 O = +2.7. This is consistent with a lunar basalt.

Skip TS Images lap02205
LAP 02205 - Plane-Polarized Light LAP 02205 - Cross-Polarized Light LAP 02205 - Plane-Polarized Light LAP 02205 - Cross-Polarized Light
Plane-Polarized Light Cross-Polarized Light Plane-Polarized Light Cross-Polarized Light
Data from:
  Table A1
  Line 2:
Mass (g):1226.3
Weathering grade:B
Fayalite (mol%):50
Ferrosilite (mol%):26-80
Plots: O isotopes:  
Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 26(2) (2003), JSC, Houston
Published in Meteoritical Bulletin, no. 88, MAPS 39, A215-A272 (2004)
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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            

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

     This is 1 of 44543 approved meteorites from Antarctica (plus 3802 unapproved names)
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