|
Northwest Africa 15358 | |||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 15358 This is an OFFICIAL meteorite name. Abbreviation: NWA 15358 Observed fall: No Year found: 2022 Country: (Northwest Africa) Mass: 260 g | ||||||||||||||||||||||||||||
Classification history: |
This is the only approved meteorite classified as Eucrite-melt breccia-an. Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 4 Dec 2022 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 111:
Northwest Africa 15358 (NWA 15358) (Northwest Africa) Purchased: 2022 Apr Classification: Eucrite-melt breccia-an History: Purchased in April 2022 by Bob Falls from a dealer in Tagounite, Morocco. Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia consisting of lithic microgabbroic clasts with sparse, dark interstitial matrix. Clasts are composed of exsolved pigeonite and calcic plagioclase together with accessory silica polymorph,ilmenite, troilite (some altered to Fe oxide) and Fe metal. Plagioclase exhibits evidence of moderate shock (undulose extinction to polycrystalline texture). The matrix is very fine grained, sepia brown to opaque in thin section, and has textural evidence of having been partly molten with entrained very small crystalline grains. Geochemistry: Low-Ca pyroxene (Fs66.2-70.4Wo1.8-4.1, FeO/MnO = 30-32, N = 4), augite (Fs30.6-34.4Wo44.0-41.7, FeO/MnO = 33-36, N = 4), plagioclase (An86.1-89.4Or0.4-1.0, N = 3). Classification: Eucrite (melt matrix breccia, anomalous). The pyroxenes in this specimen are much more ferroan than in typical eucrites, as also found in anomalous eucrites NWA 11729, NWA 12445, NWA 15076 and NWA 15202. Specimens: 21.5 g plus two covered thin sections at UWB; remainder with Mr. R. Falls. | ||||||||||||||||||||||||||||
Data from: MB111 Table 0 Line 0: |
|
||||||||||||||||||||||||||||
Institutions and collections |
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011) UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023) |
||||||||||||||||||||||||||||
Catalogs: |
| ||||||||||||||||||||||||||||
References: | Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
| ||||||||||||||||||||||||||||
Photos: |
| ||||||||||||||||||||||||||||
Geography: |
Statistics: This is 1 of 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names) | ||||||||||||||||||||||||||||
Crosslinks: |
This lists all records that are linked to this record and to each other.
| ||||||||||||||||||||||||||||
Also see: |
This lists the most popular meteorites among people who looked up this meteorite.
| ||||||||||||||||||||||||||||
Revision history: |
This lists important revisions made to data for this record.
|