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Watson 006
Basic information Name: Watson 006
     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 53 g
Meteoritical Bulletin:  MB 99  (2011)  L5
Recommended:  L5    [explanation]

This is 1 of 7157 approved meteorites (plus 4 unapproved names) classified as L5.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 26 Oct 2010
Writeup from MB 99:

Watson 006        30°30’S, 131°42’E

South Australia, Australia

Found: 9 May 2009

Classification: Ordinary chondrite (L5)

History: Two interlocking pieces were found by A. Tomkins.

Physical characteristics: This meteorite weighs 53.0 g. A matte black fusion crust present. Small, pale colored chondrules visible. The fresh interior is a pale grayish green with metal grains, veins and chondrules evident.

Petrography: (Kim Lai N. Bell, Monash). Readily discernible chondrules lie within a recrystallized matrix and include RP, POP, PP and BO. Sizes range from 0.25 to 1.5 mm, with an average diameter of 0.5 mm. Mineralogy consists of olivine, pyroxene, plagioclase, Fe-Ni metal (kamacite, taenite), and sulfides plus trace amounts of a carbon-based mineral. Olivine and pyroxene have undulose extinctions and planar fracturing in the larger grains. Plagioclase grains occur as small grains, <50 μm in size and have undulose extinctions. Metals (5%) and sulfides (5%) occur as irregularly shaped grains within the matrix, chondrules, melt veins and as small blebs in the 2-3 mm wide ablation surface. One semi-continuous metal vein cuts across the meteorite and is up to 1.5 mm wide, containing 2 large, mm-sized spherical blebs of troilite plus several micrometer sized grains of a hard carbon polymorph. Up to ~3% of the metals and sulfides are replaced by oxides.

Geochemistry: EMPA (wt%) Olivine: SiO2 = 37.24, TiO2 = 0.05, Al2O3 = 0.01, FeO = 22.62, MnO = 0.50, MgO = 39.44, CaO = 0.02, Na2O = 0.02, K2O = 0.00, (Fa = 24.34, σ = 0.19, n = 8). Low-Ca pyroxene: SiO2 = 53.78, TiO2 = 0.11, Al2O3 = 0.13, FeO = 14.11, MnO = 0.52, MgO = 29.53, CaO = 0.61, Na2O = 0.03, K2O = 0.01, (Fs = 21.14, σ = 0.91, n = 8). Kamacite: Ni = 6.68, Co= 0.81.

Classification: Ordinary chondrite (L5, S4, W1).

Specimens: Both pieces and two thin sections held by A. Tomkins at Monash.

Data from:
  Table 0
  Line 0:
State/Prov/County:South Australia
Origin or pseudonym:Nullarbor
Date:9 May 2009
Mass (g):53
Shock stage:S4
Weathering grade:W1
Fayalite (mol%):24.3
Ferrosilite (mol%):21.1
Classifier:K.-L.N. Bell
Type spec mass (g):53
Type spec location:Monash
Main mass:Monash
Finder:A. Tomkins
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° 42'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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