| MetSoc Home Publications Contacts |
|
||
|
||
| Northwest Africa 14975 | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Basic information | Name: Northwest Africa 14975 This is an OFFICIAL meteorite name. Abbreviation: NWA 14975 Observed fall: No Year found: 2021 Country: (Northwest Africa) Mass:  250 g | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 451 approved meteorites classified as Howardite. [show all] Search for other: Achondrites, HED achondrites, and Howardites | ||||||||||||||||||||||||||||||
| Comments: | Approved 5 Jul 2022 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 111:
Northwest Africa 14975 (NWA 14975) (Northwest Africa) Purchased: 2021 Aug Classification: HED achondrite (Howardite) History: Purchased by Jason Whitcomb in August 2021 from an Algerian dealer. Petrography: (A. Irving, UWS and J. Boesenberg, BrownU). Complex breccia composed of lithic clasts and crystalline debris from several different sorts of eucrites and ~25-30 vol.% diogenite material. Textures of eucrite clasts range from gabbroic to diabasic to fine intersertal, and their major constituent pyroxenes (both exsolved and unexsolved pigeonite) and calcic plagioclase range widely in composition. Accessory phases include augite, silica polymorph, ilmenite, troilite, fayalite and chromite. Diogenitic orthopyroxene also ranges widely in composition and some lithic diogenite clasts contain accessory olivine. - brecciated, clastic - metamorphic and gabbro clasts - diogenite component present, probably 25-30% area Geochemistry: Diogenitic orthopyroxene (Fs21.0-29.5Wo2.5-4.1; Fs33.8-35.7Wo3.6-4.6; FeO/MnO = 28-30, N = 6), eucrite low-Ca pyroxene (Fs43.4-51.5Wo1.9-5.8, FeO/MnO = 29-35, N = 4), pigeonite (Fs35.5-39.0Wo6.1-7.3; Fs49.0-49.9Wo12.1-14.8; FeO/MnO = 27-32; N = 5), subcalcic augite (Fs36.4Wo24.0; Fs50.9Wo22.2; FeO/MnO = 29, N = 2), augite (Fs13.2Wo44.6, FeO/MnO = 21), fayalite (Fa71.7-76.3, FeO/MnO = 42-43, N = 2), plagioclase (An81.5-92.5Or0.7-0.2, N = 3). Classification: Howardite. Specimens: 21.0 g including one polished thin section at PSF; remainder with Mr. J. Whitcomb. | ||||||||||||||||||||||||||||||
| Data from: MB111 Table 0 Line 0: |
|
||||||||||||||||||||||||||||||
| Institutions and collections |
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011) UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) BrownU: Joseph Boesenberg Brown University Dept of Earth, Environmental and Planetary Sciences (DEEPS) 324 Brook Street Providence, RI 02912 , United States (institutional address; updated 4 Jan 2024) |
||||||||||||||||||||||||||||||
| 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 9699 approved meteorites from (Northwest Africa) (plus 1854 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.
| ||||||||||||||||||||||||||||||