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| Watson 018 | |||||||||||||||||||||||||||||||||||||
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| Basic information | Name: Watson 018 This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2015 Country: Australia Mass:  27.9 g | ||||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 660 approved meteorites classified as Ureilite. [show all] Search for other: Achondrites, Ureilites | ||||||||||||||||||||||||||||||||||||
| Comments: | Approved 5 Jun 2016 | ||||||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 105:
Watson 018 30°35’34.7"S, 131°38’23.4"E South Australia, Australia Find: 2015 Apr 4 Classification: Ureilite History: Single partly buried stone found by A Tomkins. Physical characteristics: Unusual greenish brown fusion crust covers 65% of the sample; coarse 3 mm pyroxene grains can be seen through the fusion crust, defined by distinct cleavage. The broken surfaces reveal coarse elongated, square edged silicate grains exceeding 5 mm, presumably pyroxene crystals, amongst melted black material. Petrography: (S. Alkemade) This sample contains preferentially oriented, elongate coarse crystals of olivine and pigeonite meeting at triple junctions, with graphite + diamond along grain boundaries. Orthopyroxene and augite were not observed. The crystal sizes range from 1-5 mm, with majority 4-5 mm. Reduction rims affect the margins of all olivine grains, and also occur along trangressive fractures within olivine, characterized by micron sized blebs of metal amongst low FeO olivine. Geochemistry: (S. Alkemade) Microprobe analysis show: olivine Fa20.4-20.5, mean = Fa20.4±0.1, n = 4; pigeonite Fs16.9-17.4Wo8.6, mean = Fs17.2Wo8.6, n = 3. Classification: Olivine-pigeonite ureilite Specimens: 27.9 g at Monash including a thin section. | ||||||||||||||||||||||||||||||||||||
| Data from: MB105 Table 0 Line 0: |
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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) SAM: Department of Mineralogy, South Australian Museum, North Terrace, Adelaide, South Australia 5000, Australia; Website (institutional address; updated 18 Oct 2011) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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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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