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| O'Malley 009 | |||||||||||||||||||||||||||||||||||||||
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| Basic information | Name: O'Malley 009 This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2011 Country: Australia Mass:  8.4 g | ||||||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 6407 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:
O’Malley 009 30°56’1.8"S, 131°21’42.1"E South Australia, Australia Found: 9 Apr 2011 Classification: Ordinary chondrite (H4) History: Single piece found by A. Tomkins on the Nullarbor plain. Physical characteristics: Dark brown stone, rounded, lacking fusion crust. Petrography: (A. Tait, Monash) Larger chondrules have distinct grain boundaries, although they are somewhat obscured by iron oxide from weathering coating grain boundaries. Chondrule populations include; GOP, RP, POP, PO. Plagioclase grains are 2-50 microns. Olivine has sharp extinction and no shock lamellae. Weathering has oxidized all the Fe-Ni metal grains and much of the troilite. Troilite grains are (~150 μm) in diameter. Small (< 20 μm) metal grains reside in chondrules that protected them from weathering. Geochemistry: (A. Tait, Monash) Microprobe analyses show that olivine and pyroxene compositions are uniform: olivine Fa18.6-20.6, mean=19.30 mol%, std=0.92, n=4; Low-Ca pyroxene Fs17.0-17.4, mean=17.18 mol%, std=0.17, n=4. Classification: Ordinary Chondrite (H4, S1, W3). | ||||||||||||||||||||||||||||||||||||||
| Data from: MB100 Table 1 Line 1718: |
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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 240 approved meteorites from South Australia, Australia (plus 3 unapproved names) (plus 4 impact craters) This is 1 of 717 approved meteorites from Australia (plus 46 unapproved names) (plus 27 impact craters) | ||||||||||||||||||||||||||||||||||||||
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