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O'Malley 018 | |||||||||||||||||||||||||||||||||||||||
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Basic information | Name: O'Malley 018 This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2011 Country: Australia Mass: 105.2 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:
O’Malley 018 30°59’16.4"S, 131°20’26.4"E South Australia, Australia Found: 11 Apr 2011 Classification: Ordinary chondrite (H4) History: Four broken fragments were found within a 400 m2 area of clay pans by A Tomkins. Physical characteristics: Weathered with minor remnant fusion crust. Petrography: (A. Tait, Monash) Chondrules well defined and well-sorted with an average diameter of ~600 μm. The matrix is fine grained and difficult to distinguish due to weathering; there is no matrix plagioclase. Chondrules types include BO, C, PO, RP. Olivine has sharp extinction. Metal grains have been completely oxidized; troilite remains and is variably weathered. Geochemistry: (A. Tait, Monash) Microprobe analyses show that olivine and pyroxene compositions are uniform: olivine Fa18.4-19.0, mean=18.79 mol%, std=0.20, n=9; Low-Ca pyroxene Fs16.3-17.3, mean=16.68 mol%, std=0.40, n=5. Classification: Ordinary Chondrite (H4, S1, W4). | ||||||||||||||||||||||||||||||||||||||
Data from: MB100 Table 1 Line 1727: |
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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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Revision history: |
This lists important revisions made to data for this record.
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