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LaPaz Icefield 91900
Basic information Name: LaPaz Icefield 91900
     This is an OFFICIAL meteorite name.
Abbreviation: LAP 91900
Observed fall: No
Year found: 1991
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 787 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 15(2)  (1992)  Diogenite
Meteoritical Bulletin:  MB 76  (1994)  Diogenite
NHM Catalogue:  5th Edition  (2000)  Diogenite
MetBase:  v. 7.1  (2006)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 428 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Writeuphelp
Writeup from AMN 15(2):

Sample No.: LAP91900

Location: LaPaz Icefield

Field Number: 7710

Dimensions (cm): 13.0 x 6.9 x 6.0

Weight (g): 786.9

Meteorite Type: Diogenite

 

Macroscopic Description: Cecilia Satterwhite

This light grayish-green colored achondrite has dull, black, patchy fusion crust scattered over the exterior. The crystalline interior surfaces are more greenish-gray in color. A minor amount of metal is visible in the medium to coarse grained textured matrix.

 

Thin Section (,8) Description: Brian Mason

The section consists of orthopyroxene clasts, up to 3.6 mm in maximum dimension, in a groundmass of comminuted orthopyroxene. Pyroxene compositions are essentially uniform, Wo2Fs23, with Al2O3 0.5%, MnO 0.6%. This meteorite is a diogenite.

 

Data from:
  MB76
  Table 2
  Line 2873:
Mass (g):786.9
Class:Diog
Weathering grade:A/B
Ferrosilite (mol%):23
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 15(2) (1992), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (86° 22'S, 70° 0'W)
     Recommended::   (86° 22'S, 70° 0'W)

Statistics:
     This is 1 of 39173 approved meteorites from Antarctica (plus 5051 unapproved names)
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