|
Northwest Africa 13471 | |||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 13471 This is an OFFICIAL meteorite name. Abbreviation: NWA 13471 Observed fall: No Year found: 2020 Country: (Northwest Africa) Mass: 100 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 102 approved meteorites classified as Eucrite-melt breccia. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 11 Nov 2020 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northwest Africa 13471 (NWA 13471) (Northwest Africa) Purchased: Sept 2020 Classification: HED achondrite (Eucrite, melt breccia) History: The meteorite was bought by the main mass holder from a local meteorite dealer in Mauretania. Physical characteristics: Dark-grayish rock without fusion crust. Petrography: The meteorite is a melt breccia predominantly composed of large up to 1 cm sized basaltic and mineral clasts embedded into a recrystallized shock melt matrix. Exsolved pyroxene and calcic plagioclase are the dominant mineral phases. Minerals surrounded by melt show resorbtion features, are partly to completely recrystallized and often display mottled compositional zoning. In recrystallized regions feldspar often shows fibrous textures indicative for crystallization from a melt. Minor phases include silica, FeS, chromite, and ilmenite. No metallic iron has been found. Geochemistry: low-Ca pyroxene: Fs61.5±1.6Wo2.7±0.6 (Fs60.5-65.6Wo1.9-3.7, n=14, FeO/MnO=26-29); Ca-pyroxene: Fs25.8±2.5Wo43.8±0.7 (Fs23.4-32.6Wo42.1-44.6, n=16, FeO/MnO=25-31); calcic plagioclase: An89.5±0.8 (An87.9-91.0, n=14) | ||||||||||||||||||||||||||||
Data from: MB109 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 Meteoritical Bulletin, no. 109, in preparation (2020)
| ||||||||||||||||||||||||||||
Geography: |
Statistics: This is 1 of 9627 approved meteorites from (Northwest Africa) (plus 1865 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.
|