|
Northwest Africa 13571 | |||||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 13571 This is an OFFICIAL meteorite name. Abbreviation: NWA 13571 Observed fall: No Year found: 2013 Country: Morocco Mass: 61.1 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 106 approved meteorites classified as Eucrite-melt breccia. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 5 Dec 2020 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northwest Africa 13571 (NWA 13571) Morocco Purchased: 2013 Classification: HED achondrite (Eucrite, melt breccia) History: Sergey Vasiliev and Marc Jost (SJS) purchased the 61.1 g specimen from a Mohammed Sbai in Ouzarzazate, Morocco, in April 2013. Physical characteristics: Sample is an ovoid-shaped fragment. The exterior is partially coated with a greenish-orange rind that may be where the impact melt vein is exposed on the surface. The cut face of the sample shows a dark interior with an impact melt brecciated structure. Petrography: Sample shows breccia in breccia structure composed of angular to rounded clasts set within an opaque melt matrix. Clasts have brecciated textures composed of basaltic textured clasts set within a comminuted matrix crosscut by 2 mm thick opaque impact melt veins. Lithic fragments have subophitic textures with exsolved pyroxenes. Additional minerals are Si polymorph, chromite, ilmenite and apatite. Geochemistry: (A. Love, App) low-Ca pyroxene, Fs61.5±0.6Wo2.7±0.8 (Mg#36.7±0.4, Fe/Mn=30.0±1.1, n=25); pigeonite, Fs55.9±4.1Wo11.0±3.4 (Fe/Mn=30.2±0.3, n=2); high-Ca pyroxene, Fs27.7±3.5Wo42.3±4.1 (Fe/Mn=30.2±0.8, n=17); plagioclase, An88.8±2.2Or0.4±0.2 (n=24). Classification: HED achondrite (eucrite impact melt breccia). Based on textures and mineral compositions, sample is a basaltic eucrite impact melt breccia. Specimens: Sergey Vasiliev and Marc Jost (SJS) hold the main mass. A type sample of composed of a slice and end cut weighing 12.23 g and a polished thin section are on deposit at App. | ||||||||||||||||||||||||||||||
Data from: MB109 Table 0 Line 0: |
|
||||||||||||||||||||||||||||||
Institutions and collections |
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013) SJS: Space Jewels Switzerland, 2555 Brügg, Switzerland (private address; updated 3 Jan 2010) |
||||||||||||||||||||||||||||||
Catalogs: |
| ||||||||||||||||||||||||||||||
References: | Published in Meteoritical Bulletin, no. 109, in preparation (2020)
| ||||||||||||||||||||||||||||||
Geography: |
Statistics: This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||
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.
|