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Willcox Playa 009
Basic information Name: Willcox Playa 009
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2009
Country: United States
Mass:help 160 g
Meteoritical Bulletin:  MB 99  (2011)  Mesosiderite
Recommended:  Mesosiderite    [explanation]

This is 1 of 263 approved meteorites classified as Mesosiderite.   [show all]
Search for other: Mesosiderites, Metal-rich meteorites
Comments: Approved 8 Dec 2010
Writeup from MB 99:

Willcox Playa 009        32°4.6’N, 109°50.73’W

Arizona, United States

Found: 2009 Sept 23

Classification: Mesosiderite

History: A whole stone was recovered by Ruben Garcia while he was hunting for meteorites on Willcox Playa. It was partly buried in the soil.

Physical characteristics: A single ~160 g stone with a smooth weathered surface and deep cracks. It has a reddish-brown weathered surface. Only remnant fusion crust remains.

Petrography: Pyroxene occurs in clasts ranging in size from less than 1 mm to 5 mm surrounded by a network of weathered metal. Silica (to 1 mm) occurs in association with pyroxene. Plagioclase ranges in size from 1 to about 3 mm. Metal (mainly weathered) occurs as an extensive network that surrounds all of the clasts. Troilite (to 1 mm) is heterogeneously distributed. Tetrataenite (to 0.5 mm) is distributed throughout the sample.

Geochemistry: Silicates comprise about 70% of the thin section area; metal and sulfide 30%. The silicate phase is dominated by low-Ca pyroxene (Fs21-30Wo0.8-3En62-78), average plagioclase (An88Ab11Or0.4) and silica. No olivine was observed. Low-Ca pyroxene is the dominant silicate component, comprising about 64% of the silicate phase and about 45% of the entire thin section; 25% plagioclase; 29% metal; 2% sulfide. Fe/Mn ratio of pyroxene is about 27. Tetrataenite contains 34 - 48 wt% Ni. The kamacite veins are too weathered to be analyzed.

Classification: This meteorite is classified as a mesosiderite. The degree of shock is S1 with a weathering grade of W3.

Specimens: 20 g + TS (LPL); 100 g  + 1 TS + 1 potted butt (ASU).

Data from:
  Table 0
  Line 0:
Origin or pseudonym:Dry lake bed
Date:2009 Sept 23
Mass (g):160
Shock stage:S1
Weathering grade:W3
Ferrosilite (mol%):21 - 30
Wollastonite (mol%):0.8 - 3
Classifier:Lujendra Ojha, Dante A. Lauretta, Dolores H. Hill (LPL); Laurence Garvie (ASU)
Type spec mass (g):20 g
Type spec location:LPL
Main mass:Ruben Garcia
Finder:Ruben Garcia
Comments:Submitted by Lujendra Ojha
   and collections
ASU: Center for Meteorite Studies, Arizona State University, Tempe, Arizona 85287-1404, United States; Website (institutional address; updated 14 Jan 2012)
LPL: Lunar and Planetary Laboratory, University of Arizona, 1629 E. University Blvd., Tucson, AZ 85721, United States (institutional address; updated 14 Jan 2012)
References: Published in Meteoritical Bulletin, No. 99, April 2012, MAPS 47, E1-E52 (2012) [published online only]
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United States
     Recommended::   (32° 4' 36"N, 109° 50' 44"W)

     This is 1 of 178 approved meteorites from Arizona, United States (plus 1 impact crater)
     This is 1 of 1919 approved meteorites from United States (plus 867 unapproved names) (plus 28 impact craters)
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