|
Northwest Africa 14981 | |||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 14981 This is an OFFICIAL meteorite name. Abbreviation: NWA 14981 Observed fall: No Year found: 2021 Country: (Northwest Africa) Mass: 880 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 20 Jun 2022 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 111:
Northwest Africa 14981 (NWA 14981) (Northwest Africa) Purchased: 2021 Nov Classification: HED achondrite (Eucrite, polymict) History: The meteorite was purchased from a meteorite dealer in Morocco. Physical characteristics: Grayish rock almost completely covered with fusion crust. Petrography: The meteorite displays a fresh grayish interior and is polymict breccia composed of up to 2 cm sized lithic and up to 1.5 mm sized mineral fragments set in fine-grained clastic matrix. Lithic clasts include basaltic and impact melt fragments. Mineral phases are predominantly exsolved pyroxene, diognetic low-Ca pyroxene (about 3 vol%), and calcic plagioclase grains. Minor phases include fayalite, silica, ilmenite, Ti-bearing chromite, zircon, troilite, and rare metallic iron. Some slices contain black carbonaceous chondrite clasts and a rare mesosiderate-like fragment. Geochemistry: Eucrite: low-Ca pyroxene host to exsolution lamellae: Fs62.6±2.0Wo2.2±0.8 (Fs60.1-65.7Wo1.8-4.1, FeO/MnO=29-32, n=7); Ca-pyroxene exsolution lamellae: Fs27.9±0.3Wo43.0±0.3 (Fs27.5-28.4Wo42.5-43.4, FeO/MnO=29-34, n=7); diogenetic pyroxene: Fs27.0±0.3Wo2.9±0.1 (Fs26.7-27.3Wo2.8-3.0, FeO/MnO=29-30, n=7); more ferroan low-Ca-pyroxene: Fs37.0±0.3Wo2.6±0.5 (Fs36.6-37.3Wo1.9-3.1, FeO/MnO=29-32, n=7); olivine: Fa84.6±0.2, FeO/MnO=37±1, n=5); calcic plagioclase: An90.4±2.5 (An84.5-92.3, n=7). | ||||||||||||||||||||||||||||||
Data from: MB111 Table 0 Line 0: |
|
||||||||||||||||||||||||||||||
Institutions and collections |
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011) |
||||||||||||||||||||||||||||||
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.
|