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LaPaz Icefield 02216
Basic information Name: LaPaz Icefield 02216
     This is an OFFICIAL meteorite name.
Abbreviation: LAP 02216
Observed fall: No
Year found: 2002
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 613 g
Antarctic Meteorite Newsletter:  AMN 26(2)  (2003)  Diogenite
Meteoritical Bulletin:  MB 88  (2004)  Diogenite
MetBase:  v. 7.1  (2006)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 517 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Writeup from AMN 26(2):
Sample No.: LAP 02216
Location: LaPaz Ice field
Field No.: 15523
Dimensions (cm):   9.0x7.0x4.25
Weight (g): 612.6
Meteorite Type: Diogenite

Macroscopic Description: Kathleen McBride
50% of the exterior has a chocolate brown fusion crust. The fusion crust is in patches and has a dull luster with polygonal fractures. The exposed interior has a greenish gray color and shows numerous inclusions. The interior is composed of a concrete gray matrix containing numerous olivine clasts of various sizes (mm to cm). The clasts range in color from a deep gray-green to light areas. There are a few black minerals with a rusty stain around them. The rock has a 0.5 to 0.75 cm weathering rind, yellow to rust in color. The clasts are easily plucked. There are many "casts" where olivine grains had been.

Thin Section (,6) Description: Tim McCoy, Linda Welzenbach

LAP 02216 - Plane-Polarized Light LAP 02216 - Cross-Polarized Light
Plane-Polarized Light Cross-Polarized Light
The section shows a groundmass of coarse (up to 1.5 mm) comminuted pyroxene, with minor SiO2. Orthopyroxene has a composition of Fs23Wo2 and an Fe/Mn ratio of ~28. The meteorite is a diogenite and is compositionally similar to LAP 91900, with which it may be paired.
Skip TS Images lap02216
LAP 02216 - Plane-Polarized Light LAP 02216 - Plane-Polarized Light LAP 02216 - Cross-Polarized Light LAP 02216 - Cross-Polarized Light
Plane-Polarized Light Plane-Polarized Light Cross-Polarized Light Cross-Polarized Light

Data from:
  Table A1
  Line 7:
Mass (g):612.6
Weathering grade:B
Ferrosilite (mol%):23
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

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

     This is 1 of 44048 approved meteorites from Antarctica (plus 3802 unapproved names)
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