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Tungsten Mountain 058
Basic information Name: Tungsten Mountain 058
     This is an OFFICIAL meteorite name.
Abbreviation: TM 058
Observed fall: No
Year found: 2001
Country: United States
Mass:help 34.9 g
Meteoritical Bulletin:  MB 109  (2020)  H5
Recommended:  H5    [explanation]

This is 1 of 11567 approved meteorites (plus 23 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 7 Jul 2020
Writeup from MB 109:

Tungsten Mountain 058 (TM 058)        39°41.3333’N, 117°37.2057’W

Nevada, United States

Find: 4 Aug 2001

Classification: Ordinary chondrite (H5)

History: While conducting meteorite recovery on a dry-lake in Edwards Creek Valley, Robert Verish found this stone fragment on 2001-08-04

Physical characteristics: A single 34.9 g stony fragment, shaped like a dried apricot (40 × 35 × 15 mm) having dark-brown, hackly exterior with some black patina, and a small patch of relict fusion-crust. A saw-cut reveals dark-tan interior with sparse metal-grains and small chondrules Basically, a typical-looking fragment of a H-chondrite from this this dry-lake in Edwards Creek Valley.

Petrography: (D. Sheikh, FSU) Low chondrule abundance (500-700 µm, n=2). Sample is composed of olivine, low-ca pyroxene, recrystallized plagioclase (average size 7±1 µm), troilite, Fe-Ni metal, Fe-oxides, and chromite.

Geochemistry: Olivine (Fa19.1±0.6, n=18), Low-Ca Pyroxene (Fs16.8±0.6Wo1.3±0.1, n=16).

Classification: Ordinary Chondrite (H5)

Specimens: 32.1 g at UCLA; main mass with Verish.

Data from:
  Table 0
  Line 0:
Origin or pseudonym:drylake
Date:4 Aug 2001
Mass (g):34.9
Shock stage:S3
Weathering grade:W4
Fayalite (mol%):19.1±0.6 (N=18)
Ferrosilite (mol%):16.8±0.6 (N=16)
Wollastonite (mol%):1.3±0.1 (N=16)
Classifier:D. Sheikh, FSU
Type spec mass (g):32.1
Type spec location:UCLA
Main mass:Verish
Finder:Robert Verish
Comments:Fieldname = ECVB05; lab ID# = V-B05; abbr. = TM 058; submitted by Daniel Sheikh
   and collections
TM: Geoscience Museum, Transvaal Museum, P. O. Box 413, Pretoria 0001, South Africa (institutional address; updated 3 Mar 2011)
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
FSU: Department of Geological Sciences, Florida State University, Tallahassee FL 32306-4100, United States (institutional address; updated 16 Dec 2010)
Verish: Robert Verish, Meteorite-Recovery Lab, P.O. Box 463084, Escondido, CA 92046, United States; Website (private address; updated 27 May 2009)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Public domain photographs:
Daniel Sheikh      

United States
     Recommended::   (39° 41' 20"N, 117° 37' 12"W)

     This is 1 of 184 approved meteorites from Nevada, United States (plus 4 unapproved names)
     This is 1 of 1927 approved meteorites from United States (plus 866 unapproved names) (plus 28 impact craters)
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