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Watson 010
Basic information Name: Watson 010
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2009
Country: Australia
Mass:help 19.3 g
Meteoritical Bulletin:  MB 99  (2011)  H5
Recommended:  H5    [explanation]

This is 1 of 10304 approved meteorites (plus 18 unapproved names) classified as H5.   [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 from MB 99:

Watson 010        30°30’S, 131°43’E

South Australia, Australia

Found: 11 May 2009

Classification: Ordinary chondrite (H5)

History: Single mass found by K L. Bell on the Nullarbor Plain.

Physical characteristics: This meteorite is a dark brown to black. The darker coloring has been attributed to areas with fusion crust still intact (~80%). Dimensions for this sample measure 2.6 cm x 2.2 cm x 1.7 cm with weight of 19.3 g.

Petrography: (Kim Lai N. Bell, Monash). Well-defined chondrules in a rusty brown matrix, which makes it difficult to ascertain whether or not it has been recrystallized. Chondrule types include RP, POP, BO and CC with a size range between 0.2-1 mm and an average size of 0.4 mm. Mineralogy consists of olivine, pyroxene, Fe-Ni metal and sulfides. Olivine and pyroxene have undulose extinctions and planar fracturing. Fe-Ni metals (4%), taenite and kamacite, plus troilite (7%) have been heavily oxidized with up to 98% all metal and sulfides replaced.

Geochemistry: EMPA (wt%) Olivine: SiO2 = 39.50, TiO2 = 0.03, Al2O3 = 0.00, FeO = 17.72, MnO = 0.47, MgO = 42.30, CaO = 0.02, Na2O = 0.00, K2O = 0.00, (Fa = 19.03 mol%, σ = 0.24, n = 10). Low Ca-Pyroxene: SiO2 = 56.73, TiO2 = 0.05, Al2O3 = 0.38, FeO = 11.62, MnO = 0.55, MgO = 30.40, CaO = 0.52, Na2O = 0.05, K2O = 0.01, (Fs = 17.30 mol%, σ = 1.53, n = 5). Kamacite: Ni =5.31, Co = 0.49.

Classification: Ordinary chondrite (H5, S3, W4).

Specimens: Sample and one thin section held by A. Tomkins at Monash.

Data from:
  Table 0
  Line 0:
State/Prov/County:South Australia
Origin or pseudonym:Nullarbor
Date:11 May 2009
Mass (g):19.3
Shock stage:S3
Weathering grade:W4
Fayalite (mol%):19
Ferrosilite (mol%):17.3
Classifier:K.-L.N. Bell
Type spec mass (g):19.3
Type spec location:Monash
Main mass:Monash
Finder:K.-L. N. Bell
Comments:Submitted by K.-L.N. Bell, A. Tomkins
   and collections
Monash: Building 28 School of Geosciences Monash University Victoria 3800 Australia, Australia (institutional address; updated 12 Dec 2012)
References: Published in Meteoritical Bulletin, No. 99, April 2012, MAPS 47, E1-E52 (2012) [published online only]
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     Recommended::   (30° 30'S, 131° 43'E)

     This is 1 of 239 approved meteorites from South Australia, Australia (plus 2 unapproved names) (plus 4 impact craters)
     This is 1 of 715 approved meteorites from Australia (plus 45 unapproved names) (plus 27 impact craters)
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