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Patuxent Range 91546
Basic information Name: Patuxent Range 91546
     This is an OFFICIAL meteorite name.
Abbreviation: PAT 91546
Observed fall: No
Year found: 1991
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 17.9 g
Antarctic Meteorite Newsletter:  AMN 16(1)  (1993)  Chondrite-ung
AMN 17(1)  (1994)  ALH85085-like
Meteoritical Bulletin:  MB 76  (1994)  CH
NHM Catalogue:  5th Edition  (2000)  CH
MetBase:  v. 7.1  (2006)  CH3
Recommended:  CH3    [explanation]

This is 1 of 28 approved meteorites classified as CH3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CH chondrites, CH-CB family, and Metal-rich meteorites
Writeup from AMN 16(1):

Sample No.: PAT91546

Location: Patuxent Range

Dimensions (cm): 2.0 x 2.0 x 1.6

Weight (g): 17.9

Meteorite Type: Ungrouped Chondrite


Macroscopic Description: Robbie Marlow

Dull dark brown fusion crust covers most of the exterior of PAT91546. The specimen is extremely coherent. The interior is dark brown and contains several chondrules that are <1 mm in size. Several light and dark inclusions were also noted.


Thin Section (,2) Description: Brian Mason

The section shows a few chondrules (up to 0.3 mm across), abundant pyroxene and minor olivine grains, and a considerable amount of nickel-iron (about 25%). The silicate grains are small, averaging 0.03 mm. The meteorite is considerably weathered, with limonitic staining through out the section. Pyroxene composition ranges from Fs1 to Fs5, with a mean of Fs2; olivine composition ranges from Fa1 to Fa2. The metal contains no Si. The meteorite is classified as an ungrouped chondrite; it is essentially identical with ALH85085, a unique meteorite which has been intensively investigated (Earth Planet. Sci. Letters, v. 91, p. 1-54,1988).


Data from:
  Table 2
  Line 4827:
Origin or pseudonym:Main icefield
Mass (g):17.9
Weathering grade:B/C
Fayalite (mol%):1-2
Ferrosilite (mol%):1-5
Search for specimens in the Smithsonian Institution collection (U.S.):   
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References: Published in Antarctic Meteorite Newsletter 16(1) (1993), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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     Catalogue of Meteorites:   (84° 43'S, 64° 30'W)
     Recommended::   (84° 34' 31"S, 62° 8' 58"W)
Note: the NHM and MetBase coordinates are 29.1 km apart

     This is 1 of 43700 approved meteorites from Antarctica (plus 3802 unapproved names)
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