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Northwest Africa 10456 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 10456 This is an OFFICIAL meteorite name. Abbreviation: NWA 10456 Observed fall: No Year found: 2002 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 2051 approved meteorites (plus 4 unapproved names) classified as L4. [show all] Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||
Comments: | Approved 15 Dec 2015 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 104:
Northwest Africa 10456 (NWA 10456) (Northwest Africa) Purchased: Feb 2002 Classification: Ordinary chondrite (L4) History: Purchased from a Moroccan trader at the Tucson show in February 2002; 22.2 g slice donated to Cascadia on July 2, 2012. Physical characteristics: Fusion crust covers ~90% of the surface; all exterior surfaces show brown-red weathering patina; cut faces show chondritic texture. Petrography: Composed of well-defined chondrules (diameter 0.73±0.41 mm, N=77), some with fine-grained rims, and ~20% intervening opaque to translucent fine-grained matrix. Contains ~2-3% metal + troilite each, with ~40-50% metal and ~40% troilite weathered. Shock stage S4 (N=25 olivine grains). One ~2 × 1 mm inclusion, an apparent clast, contains chondrule and silicate fragments and a spinel-rich micro-CAI (~60 μm across) embedded in troilite. Geochemistry: (M. Ream and A. Ruzicka, Cascadia) Olivine (Fa24.2±0.4, N=30), low-Ca pyroxene (Fs15.2±5.7Wo1.4±1.8En83.4±6.0, N=19). Classification: L4 chondrite based on texture and mineral chemistry. Specimens: Cascadia holds a 19.6 g slice, a polished thin section, and a mounted butt. Bob Falls holds the main mass. | ||||||||||||||||||||||||||||||
Data from: MB104 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. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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Geography: |
Statistics: This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names) |