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Watson 004 | |||||||||||||||||||||||||||||||||||||
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Basic information | Name: Watson 004 This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2008 Country: Australia Mass: 1.3 g | ||||||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 6493 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 26 Oct 2010 | ||||||||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 99:
Watson 004 30°29’S, 131°33’E South Australia, Australia Found: 26 Aug 2008 Classification: Ordinary chondrite (H4) History: A small piece, was found by A. Tomkins, 200 m from Watson 003. Physical characteristics: This small meteorite weighs 1.3 g and has a diameter of ~1.4 cm. The exterior is rusty brown with small patches of a darker fusion crust. The chondritic texture is best observed on a freshly cut surface. Petrography: (Kim Lai N. Bell, Monash). This sample is composed of easily defined chondrules in a highly rusted matrix. Chondrules range in size from 0.1 to 2 mm with an average size of 0.5 mm. The chondrules are glass-free and include textural types RP, GOP, BO, PO and POP. Olivine and pyroxene grains have a straight to weakly undulose extinction with irregular fracturing. Troilite (7%) and Fe-Ni metals (4%), kamacite and taenite, have mostly been replaced (~71%) by oxides. Geochemistry: EMPA (wt%) Olivine: SiO2 = 38.74, TiO2 = 0.02, Al2O3 = 0.03, FeO = 18.15, MnO = 0.48, MgO = 42.86, CaO = 0.03, Na2O = 0.01, K2O = 0.01, (Fa = 19.22 mol%, σ = 1.17, n = 9). Low-Ca pyroxene: SiO2 = 55.59, TiO2 = 0.19, Al2O3 = 0.38, FeO = 11.37, MnO = 0.48, MgO = 31.26, CaO = 0.73, Na2O = 0.03, K2O = 0.00, (Fs = 16.77 mol%). Classification: Ordinary Chondrite (H4, S2, W3). Specimens: Sample and one thin section held by A. Tomkins at Monash. | ||||||||||||||||||||||||||||||||||||
Data from: MB99 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) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, No. 99, April 2012, MAPS 47, E1-E52 (2012) [published online only]
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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: |
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