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Cook 012 | |||||||||||||||||||||||||||||||||||||||
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Basic information | Name: Cook 012 This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2010 Country: Australia Mass: 6.6 g | ||||||||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 6484 approved meteorites (plus 2 unapproved names) classified as H4. [show all] Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||||||||||
Comments: | Approved 23 Feb 2012 | ||||||||||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 100:
Cook 012 30°54’49.6"S, 130°54’13.9"E South Australia, Australia Found: 17 Apr 2010 Classification: Ordinary chondrite (H4) History: Single piece found by A. Tomkins on the surface of the Nullarbor Plain. Physical characteristics: Two broken surfaces, ~40% smooth surface with fusion crust. Petrography: (A. Tomkins, Monash) Well defined chondrules to 1 mm, sit in a weakly recrystallized matrix. Plagioclase <5 μm in matrix. Chondrule types include RP, POP, PP, BO and PO. Most olivine grains show sharp extinction, although some grains have undulose extinction and/or planar deformation fractures. Approximately 90% of Fe-Ni metal grains are destroyed by weathering. Troilite is also weathered, but is better preserved. Geochemistry: (A. Tomkins, Monash) Microprobe analyses show that olivine compositions are uniform, whereas pyroxene compositions are moderately variable: olivine Fa17.5-18.4, mean=17.91 mol%, std=0.38, n=4; Low-Ca pyroxene Fs15.5-17.6, mean=16.38 mol%, std=0.77, n=5. Classification: Ordinary chondrite (H4, S2, W3) | ||||||||||||||||||||||||||||||||||||||
Data from: MB100 Table 1 Line 64: |
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Institutions and collections |
Monash: Building 28
School of Geosciences
Monash University
Victoria 3800
Australia, Australia (institutional address; updated 12 Dec 2012) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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Geography: |
Statistics: This is 1 of 241 approved meteorites from South Australia, Australia (plus 3 unapproved names) (plus 4 impact craters) This is 1 of 719 approved meteorites from Australia (plus 11 unapproved names) (plus 27 impact craters) | ||||||||||||||||||||||||||||||||||||||
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Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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