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| O'Malley 019 | |||||||||||||||||||||||||||||||||||||||
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| Basic information | Name: O'Malley 019 This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2011 Country: Australia Mass:  786 g | ||||||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 12780 approved meteorites (plus 11 unapproved names) classified as L6. [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 019 30°58’49.3"S, 131°20’40.4"E South Australia, Australia Found: 11 Apr 2011 Classification: Ordinary chondrite (L6) History: After an initial broken fragment was found by A. Langendam, a further 105 fragments were recovered in a 300 m2 area by the search team, mostly from within a 25 m2 area. Physical characteristics: Fragments with no remnant fusion crust, some with extensive lichen covering. Petrography: (A. Tait, Monash) Matrix is transparent and strongly recrystallized. Chondrules edges are diffuse. Chondrules vary significantly in size and composition; varieties include CO, RP, BO, PO, POP. Large plagioclase grains (> 40 μm) are common. Metal grains are larger than troilite, with an average size of ~400 μm; troilite has an average grain size of ~100 μm. Troilite is more abundant than metal. Pyroxenes and olivine have undulose extinction. Fe-Ni metal grains are ~20% oxidised. Geochemistry: (A. Tait, Monash) Microprobe analyses show that olivine and pyroxene compositions are uniform: olivine Fa25.5-25.9, mean=25.76 mol%, std=0.21, n=4; Low-Ca pyroxene Fs22.0-23.0, mean=22.35 mol%, std=0.47, n=4. Classification: Ordinary Chondrite (L6, S2, W2). | ||||||||||||||||||||||||||||||||||||||
| Data from: MB100 Table 1 Line 1728: |
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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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