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Buck Mountains 005
Basic information Name: Buck Mountains 005
     This is an OFFICIAL meteorite name.
Abbreviation: BM 005
Observed fall: No
Year found: 2007
Country: United States
Mass:help 860 g
Meteoritical Bulletin:  MB 100  (2012)  L6
Recommended:  L6    [explanation]

This is 1 of 12995 approved meteorites (plus 11 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 4 Apr 2012
Writeup from MB 100:

Buck Mountains 005 (BM 005)        34°42.202’N, 114°11.458’W

Arizona, United States

Found: 2007 Oct 9

Classification: Ordinary chondrite (L6)

History: All pieces were found on the same day in a 1.3 × 1.3 m area by Dennis Asher, who donated one specimen to Cascadia on July 7, 2009, and another small fragment on June 14, 2010.

Physical characteristics: The specimens have broken surfaces covered by a weathering patina that varies from light brown to dark brown, and portions with a smooth fusion crust covered by the same patina. The smaller fragment has a distinctive ridge.

Petrography: (A. Ruzicka and M. Hutson, Cascadia) Texture dominantly granoblastic. Indistinct chondrules visible. Feldspar grains are commonly >50 µm and sometimes >100 µm across, consistent with petrologic type 6. Somewhat less than 50% of the metal is replaced by weathering products. The ridge in the smaller fragment is the surface expression of a 5-mm-wide glassy vein that has a zoned structure, with a well-defined central core that contains clasts.

Geochemistry: Olivine Fa25.0±0.5, n=61; low-Ca pyroxene Fs20.7±0.6Wo1.6±0.2, n=6.

Classification: Ordinary chondrite (L6), contains incipient metal veins and one thick glassy vein..

Specimens: 77 g, two polished thin sections, and two butts are on deposit at Cascadia. The finder holds the main mass.

Data from:
  Table 1
  Line 38:
Date:2007 Oct 9
Mass (g):859.7
Shock stage:S4
Weathering grade:W2
Fayalite (mol%):25.0
Ferrosilite (mol%):20.7
Wollastonite (mol%):1.6
Classifier:A. Ruzicka and M. Hutson, Cascadia
Type spec mass (g):77.0
Type spec location:Cascadia
Main mass:Mr. Dennis Asher
Finder:Mr. Dennis Asher
Comments:Submitted by A. Ruzicka
   and collections
Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011)
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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United States
     Recommended::   (34° 42' 12"N, 114° 11' 27"W)

     This is 1 of 180 approved meteorites from Arizona, United States (plus 1 impact crater)
     This is 1 of 1930 approved meteorites from United States (plus 866 unapproved names) (plus 28 impact craters)
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Synonymshelp: Yucca 014 (MetBull 101)

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