![]() |
||
|
Northwest Africa 10458 | |||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 10458 This is an OFFICIAL meteorite name. Abbreviation: NWA 10458 Observed fall: No Year found: 2014 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 8831 approved meteorites (plus 4 unapproved names) classified as L5. [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 10458 (NWA 10458) (Northwest Africa) Purchased: Aug 2014 Classification: Ordinary chondrite (L5) History: Purchased in August 2014 by John Shea from Gary Fujihara who obtained the meteorite from a trader of specimens collected from near the border of Morocco and Algeria. Samples were donated to Cascadia in October, 2014 Physical characteristics: Shiny fusion crust covers most of hand specimen. Rust halos surround metal in cut faces. Petrography: Granoblastic textured specimen showing somewhat indistinct chondrules and feldspar <50 µm across. Chondrule diameter 0.72±0.37 mm (N=24). Contains ~4% metal, with most metal and troilite grains showing minimal or no replacement by weathering products. Shock stage S3 (N=25 olivine grains). Geochemistry: (M. Ream and A. Ruzicka, Cascadia) Olivine (Fa25.1±0.4, N=12), low-Ca pyroxene (Fs21.2±0.2Wo1.7±0.2En77.1±0.3, N=12). Classification: L5 chondrite based on mineral chemistry and texture. Specimens: Cascadia holds 42.3 g in three 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
| ||||||||||||||||||||||||||||
Photos: |
| ||||||||||||||||||||||||||||
Geography: |
Statistics: This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names) |