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Outpost Nunatak A80301
Basic information Name: Outpost Nunatak A80301
     This is an OFFICIAL meteorite name.
Abbreviation: OTTA80301
This meteorite may also be called Outpost Nunatak 80301 (OTT 80301) in publications.

Observed fall: No
Year found: 1980
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 35.5 g
Antarctic Meteorite Newsletter:  AMN 5(1)  (1982)  H3
Meteoritical Bulletin:  MB 76  (1994)  H3.8
NHM Catalogue:  5th Edition  (2000)  H3.8
MetBase:  v. 7.1  (2006)  H3.8
Recommended:  H3.8    [explanation]

This is 1 of 78 approved meteorites classified as H3.8.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Writeup from AMN 5(1):

Sample No.: OTTA80301

Location: Outpost Nunatak

Field No.: 1088

Weight (gms): 35.5

Meteorite Type: H3 Chondrite


Physical Description: Roberta Score

90% of this specimen is covered with brown and black fusion crust which is pitted in some areas. One corner has been broken off to reveal a vein of weathered material from 1 to 5 mm wide, which is a much darker gray than the less weathered matrix. The interior is marked by abundant chondrules and irregular shaped inclusions. Dimensions: 3.5 x 3 x 2 cm.


Petrographic Description: Brian Mason

The section shows a close-packed aggregate of chondrules and some irregular granular enclaves; the matrix consists of fine-grained silicates with a moderate amount of nickel-iron and a lesser amount of troilite. Chondrules range up to 1.1 mm across, and show a variety of types, the commonest being granular olivine and olivine-pyroxene (polysynthetically twinned clinobronzite), porphyritic olivine, and fine-grained pyroxene. Some intergranular glass in the chondrules is clear and transparent, but much of it is turbid and partly devitrified. Minor brown limonitic staining is present around nickel-iron grains. Microprobe analyses show olivine and pyroxene with variable composition: olivine, Fa17-19, average Fa18; pyroxene, Fs4-19, average Fs10. The meteorite is tentatively classified as an H3 chondrite.

Data from:
  Table 2
  Line 4783:
Mass (g):35.5
Weathering grade:B/C
Fayalite (mol%):17-19
Ferrosilite (mol%):4-19
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References: Published in Antarctic Meteorite Newsletter 5(1) (1982), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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     Catalogue of Meteorites:   (75° 50'S, 158° 12'E)
     Recommended::   (75° 50'S, 158° 12'E)

     This is 1 of 43840 approved meteorites from Antarctica (plus 3802 unapproved names)
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