![]() |
||
|
Pecora Escarpment 91328 | |||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Pecora Escarpment 91328 This is an OFFICIAL meteorite name. Abbreviation: PCA 91328 Observed fall: No Year found: 1991 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass: ![]() | ||||||||||||||||||||||||
Classification history: |
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![]() |
Writeup from AMN 16(2):
Sample No.: PCA91328; 91452; 91467 Location: Pecora Escarpment Dimensions (cm): 2.2 x 2.1 x 1.0; 2.7 x 2.0 x 0.9; 2.6 x 3.4 x 3.0 Weight (g): 11.0; 7.2; 46.9 Meteorite Type: Chondrite (ungrouped)
Macroscopic Description: Robbie Marlow and Cecilia Satterwhite Smooth, brown fusion crust covers 50% of each of these three meteorite fragments. Numerous fractures penetrate the interior of PCA91328. The exposed interiors are dark brown to black and fine-grained. A few very small inclusions were noted in PCA91452 and 91467. Weathering is extensive.
Thin Section (PCA91328,2; 91452,2; 91467,2) Description: Brian Mason The sections show a few c hondrules, up to 0.3 mm across, abundant pyroxene grains (0.02-0.08 mm), and a considerable amount of nickel-iron. The meteorite is severely weathered, with limonitic staining throughout the sections. Most of the pyroxene is close to MgSiO3 in composition, but ranges up to Fs16. The metal contains less than 0.1% Si. The meteorite is classified as an ungrouped chondrite; it is essentially identical with PAT 91546 and ALH 85085 (Earth Planet. Sci. Letters, v. 91, p.1-64,1988).
| ||||||||||||||||||||||||
Data from: MB76 Table 2 Line 5121: |
|
||||||||||||||||||||||||
Catalogs: |
| ||||||||||||||||||||||||
References: | Published in Antarctic Meteorite Newsletter 16(2) (1993), JSC, Houston Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
| ||||||||||||||||||||||||
Geography:![]() |
Statistics: This is 1 of 43700 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||||||
Proximity search: |