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Mount Pratt 04401
Basic information Name: Mount Pratt 04401
     This is an OFFICIAL meteorite name.
Abbreviation: PRA 04401
Observed fall: No
Year found: 2004
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 55 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 30(1)  (2007)  Howardite
Meteoritical Bulletin:  MB 92  (2007)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 384 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 16 Feb 2007
Writeuphelp
Writeup from AMN 30(1):
Sample No.: PRA 04401; PRA 04402
Location: Mt. Pratt
Field No.: 15719; 15703
Dimensions (cm):   3.5x3.5x2.5; 4.5x3.5x2.0
Weight (g): 54.979; 37.759
Meteorite Type: Howardite


Macroscopic Description: Kathleen McBride
20-50% of the exteriors have thin, shiny patches of black fusion crust. The interiors are charcoal gray to black matrix with no metal visible.


Thin Section (,2) Description: Tim McCoy and Valerie Reynolds
The meteorites are so similar that a single description suffices. The sections show a groundmass of comminuted pyroxene and plagioclase (up to 0.5 mm) with fine- to coarse-grained basaltic clasts ranging up to 5 mm. PRA 04401 contains particularly abundant CM2 clasts. Orthopyroxene compositions span a range of Fs16-60Wo1-3, although a single grain of Fs1 was observed, presumably from the CM2 clast. The Fe/Mn ratio is ~30 and feldspar is anorthitic (An87-90). The meteorites are howardites.



Thin Section Images

Cross-Polarized
Light PRA 04401
Plane-Polarized
Light PRA 04401
PRA 04401 - Cross-Polarized Light PRA 04401 - Plane-Polarized Light
Cross-Polarized
Light PRA 04402
Plane-Polarized
Light PRA 04402
<a href=PRA 04402 - Cross-Polarized Light"> <a href=PRA 04402 - Plane-Polarized Light">



Lab Images

PRA 04401
<a href=PRA 04402" border="0">
PRA 04401 & <a href=PRA 04402" border="0">
PRA 04401 & <a href=PRA 04402" border="0">

Data from:
  MB92
  Table 3
  Line 973:
Mass (g):55
Class:How
Weathering grade:CE
Ferrosilite (mol%):1-60
Catalogs:
Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 30(1) (2007), JSC, Houston
Published in Meteoritical Bulletin, no. 92, MAPS 42, 1647-1694 (2007)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photographs from AMN:
JSC A photo is in the write-up above
Geography:

Antarctica
Coordinates:Unknown.

Statistics:
     This is 1 of 40129 approved meteorites from Antarctica (plus 4494 unapproved names)

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