![]() |
||
|
Northwest Africa 10457 | |||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 10457 This is an OFFICIAL meteorite name. Abbreviation: NWA 10457 Observed fall: No Year found: 2013 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 12583 approved meteorites (plus 8 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 15 Dec 2015 | ||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 104:
Northwest Africa 10457 (NWA 10457) (Northwest Africa) Purchased: 2013 Classification: Ordinary chondrite (L6) History: Purchased in 2013 by John Shea. Samples were donated to Cascadia in October, 2014. Physical characteristics: Reddish weathering patina and patchy fusion crust occur on rough exterior surfaces, and faint chondritic texture is visible in cut faces. Petrography: Granoblastic textured specimen showing poorly-defined chondrules and feldspar often >50 μm across in a reddish stained section. Chondrule diameter 0.73±0.21 mm (N=8). Contains ~2-3% metal, with <40% of metal and troilite replaced by weathering products. Shock stage S4 (N=25 olivine grains). Geochemistry: (M. Ream and A. Ruzicka, Cascadia) Olivine (Fa25.9±0.4, N=13), low-Ca pyroxene (Fs21.8±0.3Wo1.4±0.2En76.7±0.4, N=10). Classification: L6 chondrite based on mineral chemistry and texture. Specimens: Cascadia holds 43.7 g in multiple pieces, in addition to one polished thin section and a mounted butt. John H. Shea holds the main mass. | ||||||||||||||||||||||||||||
Data from: MB104 Table 0 Line 0: |
|
||||||||||||||||||||||||||||
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. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
| ||||||||||||||||||||||||||||
Geography: |
Statistics: This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names) |