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| Yucca 042 | |||||||||||||||||||||||||||||||||
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| Basic information | Name: Yucca 042 This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2004 Country: United States Mass:  945 g | ||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 80 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 7 Jul 2016 | ||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 105:
Yucca 042 34°44.055’N, 114°12.397’W Arizona, United States Find: 10 Mar 2004 Classification: Ordinary chondrite (H3-6) Petrography: In thin section, the sample appears to be relatively integrated, grading from material with a texture resembling a type 5 chondrite comprised primarily of chondrule fragments to material resembling a type 4 chondrite comprised of well-defined chondrules amidst chondrule fragments. Smaller chondrule and mineral fragments occur between chondrules and larger chondrule fragments; lithic clasts are absent. BSE imaging shows that most of the meteorite contains equilibrated silicate, but that there is a substantial (~10 area %) admixture of type 3 material (both magnesian and iron-rich zoned olivine and pyroxene grains). Most of the equilibrated material contains devitrified glass or small (< 50 μm) plagioclase feldspar grains; coarse (>50 μm) plagioclase is also present. Chlorapatite, merrillite, chromite-plagioclase objects, and metallic copper were observed. Geochemistry: (M. Hutson and A. Ruzicka, Cascadia) Representative analyses for fragments and chondrules (both equilibrated and unequilibrated grains): olivine (Fa18.9±5.4, N=104), low-Ca pyroxene (Fs16.2±3.6Wo1.3±0.8, N= 66), plagioclase feldspar (Ab79.7±2.2Or5.8±2.7, N=17). Classification: Sample represents an intimate mixture of fragmental material. Type 3 is inferred from presence of zoned magnesian and ferroan olivine grains; type 6 from coarse (>50 μm) plagioclase feldspar grains. Sample is classified as an H3-6 genomict breccia. May be paired with Buck Mountain Wash (Yucca 002). Specimens: Cascadia holds 28.6 g in multiple pieces, in addition to one polished thin section and a mounted butt. | ||||||||||||||||||||||||||||||||
| Data from: MB105 Table 0 Line 0: |
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| 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) |
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| Catalogs: |
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| 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:
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Statistics: This is 1 of 179 approved meteorites from Arizona, United States (plus 1 impact crater) This is 1 of 1927 approved meteorites from United States (plus 866 unapproved names) (plus 28 impact craters) | ||||||||||||||||||||||||||||||||
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| Revision history: |
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