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Watson 019
Basic information Name: Watson 019
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2015
Country: Australia
Mass:help 83 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  L6
Recommended:  L6    [explanation]

This is 1 of 11460 approved meteorites (plus 6 unapproved names) classified as L6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 14 Mar 2017
Writeuphelp
Writeup from MB 106:

Watson 019        30°34’33.3"S, 131°37’19.3"E

South Australia, Australia

Find: 11 Apr 2015

Classification: Ordinary chondrite (L6)

History: One stone fragment found broken, face down, by S. Nutku. Sub-sectioned for biology experiment in the field.

Physical characteristics: Single orientated stone with full fustion crust on orientated side. Stone appeared to be broken in half.

Petrography: (A. Tait, Monash U.) Relict chondrules are rare, those that exist have edges that are poorly defined and hard to differentiation from the olivine dominated recrystallized matrix. Relict chondrules types include POP, OP, all others have been recrystallized. Oxidation of FeNi alloys and troilite is minimal (~10%), some grains exhibit halos of oxidation but most do not. Linear veins of FeNi and troilite are seen cross cutting the sample on scales up to <1cm in length, these are on occasion intermixed with silicate cataclasis. These veins are also the regions of most oxidation. Olivine shows conjugate-pairs (shock feature that exhibits 60/120 degree cross cutting lamella in the olivine) and weak mosaicism, plagioclase grains are large (50-100 μm) but do not show the transition to maskelynite.

Geochemistry: (A. Tait, Monash) EPMA analysis show olivine and pyroxene compositions are uniform: Olivine Fa24.5-25.8, mean = Fa25.1±0.31, n = 17; Low-Ca pyroxene Fs20.6-22.5Wo1.0-1.9, mean = Fs21.2±0.41Wo1.5±0.2, n = 21.

Classification: Ordinary Chondrite (L6, S3, W1)

Specimens: Main mass and one thin section curated at Monash.

Data from:
  MB106
  Table 0
  Line 0:
State/Prov/County:South Australia
Origin or pseudonym:Nullarbor Plain
Date:11 Apr 2015
Latitude:30°34'33.3"S
Longitude:131°37'19.3"E
Mass (g):83
Pieces:1
Class:L6
Shock stage:S3
Weathering grade:W1
Fayalite (mol%):25.1±0.3 (n=17)
Ferrosilite (mol%):21.2±0.4 (n=21)
Wollastonite (mol%):1.5±0.2 (n=21)
Classifier:A. Tait, Monash
Type spec mass (g):75
Type spec location:Monash
Main mass:Monash
Finder:S. Nutku
Comments:Submitted by (A. Tait, A. Tomkins, S. Nutku, A. Langendam)
Institutions
   and collections
Monash: Building 28 School of Geosciences Monash University Victoria 3800 Australia, Australia (institutional address; updated 12 Dec 2012)
Catalogs:
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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Geography:

Australia
Coordinates:
     Recommended::   (30° 34' 33"S, 131° 37' 19"E)

Statistics:
     This is 1 of 238 approved meteorites from South Australia, Australia (plus 2 unapproved names) (plus 4 impact craters)
     This is 1 of 710 approved meteorites from Australia (plus 45 unapproved names) (plus 27 impact craters)
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