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| O'Malley 012 | |||||||||||||||||||||||||||||||||||||||
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| Basic information | Name: O'Malley 012 This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2011 Country: Australia Mass:  14.1 g | ||||||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 2062 approved meteorites (plus 5 unapproved names) classified as L4. [show all] Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||||||||||
| Comments: | Approved 23 Feb 2012 | ||||||||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 100:
O’Malley 012 30°53’34.1"S, 131°23’29.1"E South Australia, Australia Found: 9 Apr 2011 Classification: Ordinary chondrite (L4) History: Single piece found by A. Tomkins on the Nullarbor plain. Physical characteristics: Flatish dark brown stone with ~30% fusion crust. Petrography: (A. Tait, Monash) Large variety of well-sorted and well-defined chondrules including; GOP, CP, BO, POP and RP, all of which were on the order of 900 μm in diameter. Matrix is transparent and recrystallized. Plagioclase is very fine grained. Olivine grains show extensive undulose extinction. Troilite and Fe-Ni metal are extensively weathered; few metal grains remain. Geochemistry: (A. Tait, Monash) Microprobe analyses show that olivine and pyroxene compositions are uniform: olivine Fa22.3-22.8, mean=22.59 mol%, std=0.25, n=4; Low-Ca pyroxene Fs19.5-20.4, mean=20.01 mol%, std=0.38, n=5. Classification: Ordinary Chondrite (L4, S2, W3). | ||||||||||||||||||||||||||||||||||||||
| Data from: MB100 Table 1 Line 1721: |
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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:
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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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| Revision history: |
This lists important revisions made to data for this record.
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