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Stewart Valley 012
Basic information Name: Stewart Valley 012
     This is an OFFICIAL meteorite name.
Abbreviation: StV 012
Observed fall: No
Year found: 2012
Country: United States
Mass:help 130 g
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  H6
Recommended:  H6    [explanation]

This is 1 of 5306 approved meteorites (plus 3 unapproved names) classified as H6.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 22 May 2012
Writeuphelp
Writeup from MB 100:

Stewart Valley 012 (StV 012)        36°14.100’N, 116°11.015’W

Nevada, USA

Found: 26 Feb 2012

Classification: Ordinary chondrite (H6)

History: Jason Snyder found several meteorite fragments on February 26, 2012, while he was hunting for meteorites on the Stewart Valley Dry Lake near Pahrump, Nevada. Some were clumped together and the smaller pieces formed a 12-inch elliptical pattern. The largest piece, which was at the center, was slightly buried and weighed 27.8 g. Twelve pieces were recovered at that spot and weighed a total of 64.1 g. More pieces were recovered within 100 m, and ranged from sub-gram to several grams.

Physical characteristics: Dark, rough, weathered exterior. Saw cut reveals ~15% bright, sub-mm metal grains, some aligned, set in a dark brown matrix, parallel veins or fractures.

Petrography: (C. Agee, UNM) Microprobe examination of a polished thin section shows a few equilibrated, indistinct chondrules. Olivine, pyroxene, plagioclase, chlor-apatite, troilite and abundant kamacite present.

Geochemistry: (C. Agee and N. Wilson, UNM) Olivine Fa19.1±0.2, Fe/Mn=38±1, n=3; low-Ca pyroxene Fs17.3±0.3Wo1.0±0.2, Fe/Mn=23±1, n=3; plagioclase Ab73An25Or2; and kamacite Fe=93.75 Ni=5.97 Co=0.31 wt%.

Classification: Ordinary chondrite (H6), weathering grade W1.

Specimens: 60.3 g plus a polished thin section on deposit at UNM, Jason Snyder holds the main mass.

Data from:
  MB100
  Table 1
  Line 1914:
State/Prov/County:Nevada
Date:26 Feb 2012
Latitude:36°14.100'N
Longitude:116°11.015'W
Mass (g):130
Pieces:>12
Class:H6
Weathering grade:W1
Fayalite (mol%):19.1±0.2
Ferrosilite (mol%):17.3±0.3
Wollastonite (mol%):1.0±0.2
Classifier:C. Agee, UNM
Type spec mass (g):60.3
Type spec location:UNM
Main mass:Jason Snyder
Finder:Jason Snyder
Comments:Submitted by C. Agee
Institutions
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
Catalogs:
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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Geography:

United States
Coordinates:
     Recommended::   (36° 14' 6"N, 116° 11' 1"W)

Statistics:
     This is 1 of 120 approved meteorites from Nevada, United States (plus 9 unapproved names)
     This is 1 of 1789 approved meteorites from United States (plus 352 unapproved names) (plus 28 impact craters)
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