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Tank Mountains
Basic information Name: Tank Mountains
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2010
Country: United States
Mass:help 8.05 kg
Meteoritical Bulletin:  MB 105  (2016)  L6
Recommended:  L6    [explanation]

This is 1 of 11725 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 16 Oct 2016
Writeup from MB 105:

Tank Mountains        33.0961526°N, 113.6315885°W

Arizona, United States

Find: 2010

Classification: Ordinary chondrite (L6)

History: In 2010, Mr. Joe King found ten meteorite fragments while he was prospecting in the vicinity of the Golden Harp Mine, in the Tank Mountains between Yuma and Gila Bend, Arizona. The fragments, with a total mass of 8.05 kg, range from a few grams to several kg; the pieces fit together.

Physical characteristics: The pieces are orange-stained. Remnant fusion crust visible. Stone is angular with a few broad regmaglypts. Sawn surface is orange stained, showing an even distribution of small metal grains, to 1 mm, and a few discernible chondrules to 2 mm. A few thin shock veins traverse the slice.

Petrography: (L. Garvie, ASU) Electron microscopic examination of a polished thin section shows few recognizable chondrules. Olivine shows well developed PDFs and mosaicism. Kamacite shocked showing indistinct Neumann bands. Troilite grains single crystal, some polycrystalline. Plagioclase common and to 400 microns. Accessory chromite, Cl-apatite, and merrillite. Chromite extensively fractured. Troilite ~50% altered and kamacite ~25% altered to terrestrial oxides.

Geochemistry: (K. Domanik, UAz) Olivine Fa25.2±0.5, Fe/Mn=47±3, n=21, low-Ca pyroxene Fs21.3±0.9Wo1.7±0.3, Fe/Mn=29±2, n=22, augite Fs7.5±0.5Wo45.6±0.6, Fe/Mn=25±1, n=2, plagioclase Ab83.9±0.5An10.0±0.2Or6.1±0.4, n=5, large kamacite grains with 6.39 wt% Ni±0.36, n=10.

Classification: Ordinary chondrite, L6, S3, W2

Specimens: 382 g at ASU

Data from:
  Table 0
  Line 0:
Mass (g):8050
Shock stage:S3
Weathering grade:W2
Fayalite (mol%):25.2±0.5
Ferrosilite (mol%):21.3±0.9
Wollastonite (mol%):1.7±0.3
Classifier:L. Garvie, K. Domanik, ASU
Type spec mass (g):382
Type spec location:ASU
Main mass:Aerolite Meteorites Inc
Finder:Joe King
Comments:Submitted by L. Garvie
   and collections
ASU: Center for Meteorite Studies, Arizona State University, Tempe, Arizona 85287-1404, United States; Website (institutional address; updated 14 Jan 2012)
UAz: 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. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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United States
     Recommended::   (33° 5' 46"N, 113° 37' 54"W)

     This is 1 of 177 approved meteorites from Arizona, United States (plus 1 impact crater)
     This is 1 of 1883 approved meteorites from United States (plus 890 unapproved names) (plus 28 impact craters)
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