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LaPaz Icefield 04642
Basic information Name: LaPaz Icefield 04642
     This is an OFFICIAL meteorite name.
Abbreviation: LAP 04642
Observed fall: No
Year found: 2004
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 1.2 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 29(1)  (2006)  H-imp melt
Meteoritical Bulletin:  MB 91  (2007)  H-imp melt
Recommended:  H-imp melt    [explanation]

This is 1 of 13 approved meteorites classified as H-imp melt.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 21 Feb 2005
Writeuphelp
Writeup from AMN 29(1):
Sample No.: LAP 031173;
LAP 04642
Location: LaPaz Ice Field
Field No.: 16105; 17406
Dimensions (cm):   1.5x1.0x0.5
1.0x1.0x0.5
Weight (g): 1.360; 1.196
Meteorite Type: H Chondrite (Impact Melt)
LAP 031173


Macroscopic Description: Kathleen McBride
The exteriors are covered with brown/black fusion crust with oxidation halos. The interiors are rusty brown with a brittle texture.

Thin Section (,2) Description: Tim McCoy and Linda Welzenbach
These sections are so similar that a single description suffices. The meteorites exhibit a microcrystalline silicate matrix including rounded metal-sulfide blebs reaching 20 microns and relict grains, chondrules and clasts reaching up to a few mm. Mafic silicate compositions (Fa19, Fs17) indicate they are of H chondrite parentage and textures suggest they are impact melt breccias.

Cross-Polarized LightPlane-Polarized LightReflected Light
LAP 031173 - Cross-Polarized Light LAP 031173 - Plane-Polarized Light LAP 031173 - Reflected Light

Cross-Polarized LightReflected Light
LAP 04642 - Cross-Polarized Light LAP 04642 - Reflected Light
Data from:
  MB91
  Table 4
  Line 680:
Mass (g):1.2
Class:H (IM)
Weathering grade:B
Fayalite (mol%):19
Ferrosilite (mol%):17
Catalogs:
Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 29(1) (2006), JSC, Houston
Published in Meteoritical Bulletin, no. 91, MAPS 42, 413-466 (2007)
Find references in NASA ADS:
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Photos:
CreditPhotos
Photographs from AMN:
Photograph from unknown source A photo is in the write-up above
Geography:

Antarctica
Coordinates:Unknown.

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

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