|
Northwest Africa 14847 | |||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 14847 This is an OFFICIAL meteorite name. Abbreviation: NWA 14847 Observed fall: No Year found: 2021 Country: (Northwest Africa) Mass: 636 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 406 approved meteorites classified as Eucrite-pmict. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 6 Aug 2022 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 111:
Northwest Africa 14847 (NWA 14847) (Northwest Africa) Purchased: 2021 May Classification: HED achondrite (Eucrite, polymict) History: Purchased by Said Yousfi in May 2021 from a Mauritanian dealer. Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed predominantly of angular mineral grains (mean grainsize 0.7 mm with some grains up to 1.9 mm) related to one or more gabbroic eucrite lithologies together with some fine grained ophitic eucrite clasts and some diogenite material (< 10 vol.%). All of the plagioclase in this specimen has been converted to isotropic maskelynite. Eucritic minerals are exsolved pigeonite, maskelynite, silica polymorph, medium-Ti chromite, ilmenite, troilite (exhibiting some secondary Fe oxide alteration) and rare metal. Rare polycrystalline diogenite clasts are present, but most of the diogenitic material consists of single, zoned orthopyroxene grains with more ferroan, concentric rims. All diogenitic orthopyroxene exhibits undulose extinction. Geochemistry: Diogenitic orthopyroxene (cores Fs24.1-25.6Wo1.8-2.0, FeO/MnO =30-33, N = 2; rims Fs49.9-50.6Wo1.9-2.6, FeO/MnO = 33, N = 2), low-Ca pyroxene host (Fs51.7Wo2.8, FeO/MnO = 32), augite exsolution lamellae (Fs21.8-24.4Wo43.7-42.4, FeO/MnO = 27-28, N = 2), maskelynite (An86.5-90.3Or0.7-0.3, N = 3). Classification: Eucrite (polymict breccia, maskelynite-bearing). Specimens: 24.1 g including one polished thin section at UWB; remainder with Mr. S. Yousfi. | ||||||||||||||||||||||||||||
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. ?
| ||||||||||||||||||||||||||||
Geography: |
Statistics: This is 1 of 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names) | ||||||||||||||||||||||||||||
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.
|