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Northwest Africa 15804 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 15804 This is an OFFICIAL meteorite name. Abbreviation: NWA 15804 Observed fall: No Year found: 2017 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 6459 approved meteorites (plus 2 unapproved names) classified as H4. [show all] Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||
Comments: | Approved 19 Mar 2023 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 112:
Northwest Africa 15804 (NWA 15804) (Northwest Africa) Purchased: April 2017 Classification: Ordinary chondrite (H4) History: Acquired online in April 2017 by James Shelton from a meteorite dealer in northwest Africa. Physical characteristics: Multiple stones with dark-brown fusion crust. Petrography: (D. Sheikh, Cascadia) Sample is comprised of chondrules set within a fine-grained matrix containing accessory Fe-Ni metal, troilite, and chromite. Geochemistry: Olivine (Fa17.7±1.0, range Fa16.5-20.0, n=19), Low-Ca Pyroxene (Fs16.0±1.5Wo1.1±0.9, range Fs14.5-19.5Wo0.3-4.4, n=19). Classification: Ordinary chondrite (H4). Specimens: 20.2 g at Cascadia, main mass with James Shelton. | ||||||||||||||||||||||||||||||
Data from: MB112 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. 112, in preparation (2023)
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Geography: |
Statistics: This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names) |