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Yucca 041
Basic information Name: Yucca 041
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2005
Country: United States
Mass:help 48.5 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  H3-6
Recommended:  H3-6    [explanation]

This is 1 of 74 approved meteorites classified as H3-6.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 27 Feb 2016
Writeuphelp
Writeup from MB 105:

Yucca 041        34°42.05’N, 114°17.3’W

Arizona, United States

Find: 2005 Sep

Classification: Ordinary chondrite (H3-6)

History: Found by Dennis Asher. Jerry A. Baird donated the entire stone to Cascadia.

Physical characteristics: Most of sample has a broken surface covered with weathering patina and dust. Fusion crust occurs on one small area.

Petrography: In thin section composed mostly of an intimate mixture of mineral and chondrule fragments with diverse (type 3-6) characteristics. BSE imaging shows that most of the rock is composed of type 4-6 lithologies, with equilibrated olivine, and plagioclase up to 50 μm and sometimes >100 μm across, but that some zoned or magnesian or ferroan olivine and pyroxene grains characteristic of type 3 are present. This resembles the fragmental (main) lithology of Buck Mountain Wash. Shock effects in olivine are variable (weak undulose extinction to strong mosaicism), with ?25% of the olivine grains showing mosaic extinction with multiple sets of planar fractures indicating a shock stage of S4. Metal and sulfide grains show minor weathering (~5% replacement by Fe-hydroxides). Contains a band of shock melt with zoned olivine crystals set in glass, and silica polymorph.

Geochemistry: (M. Hutson and A. Ruzicka, Cascadia) Dominated by equilibrated olivine (median Fa18.5, N=127) and low-Ca pyroxene (median Fs12.1, N=129), but also containing more magnesian and ferroan olivine (Fa6.5-30.3) and low-Ca pyroxene (Fs0.9-37.8). Overall average including both equilibrated and more varied compositions in the mixture is olivine (Fa16.7±6.5, N=127), low-Ca pyroxene (Fs11.3±7.8Wo1.2±1.3En87.6±8.4, N= 129).

Classification: H3-6 finely intermixed genomict breccia. Type 5-6 lithology implied by larger feldspar grain sizes and equilibrated olivine and pyroxene; type 3 lithology implied by common presence of magnesian and zoned olivine and pyroxene. Paired with Buck Mountain Wash on the basis of mineralogy, mineral chemistry, and texture.

Specimens: Cascadia holds 41.4 g in single piece, in addition to two polished thin sections and a mounted butt.

Data from:
  MB105
  Table 0
  Line 0:
State/Prov/County:Arizona
Date:2005 Sep
Latitude:34°42.05'N
Longitude:114°17.3'W
Mass (g):48.5
Pieces:1
Class:H3-6
Shock stage:S4
Weathering grade:W1
Magnetic suscept.:5.2
Classifier:M. Hutson and A. Ruzicka, Cascadia
Type spec mass (g):41.4
Type spec location:Cascadia
Main mass:Cascadia
Finder:Dennis Asher
Comments:Lab number CML0720; field number JAB-135;; submitted by A. Ruzicka
Institutions
   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)
Catalogs:
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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Geography:

United States
Coordinates:
     Recommended::   (34° 42' 3"N, 114° 17' 18"W)

Statistics:
     This is 1 of 170 approved meteorites from Arizona, United States (plus 1 impact crater)
     This is 1 of 1871 approved meteorites from United States (plus 890 unapproved names) (plus 28 impact craters)
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