|
Northwest Africa 7400 | |||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 7400 This is an OFFICIAL meteorite name. Abbreviation: NWA 7400 Observed fall: No Year found: 2012 Country: (Northwest Africa) Mass: 138 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 279 approved meteorites classified as Eucrite-mmict. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 3 Jun 2013 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 102:
Northwest Africa 7400 (NWA 7400) (Northwest Africa) Purchased: 2012 May Classification: HED achondrite (Eucrite, monomict) History: Purchased by JAaronson in May 2012 from a delaer in Erfoud, Morocco. Physical characteristics: Gray 138 g stone with stained metal. Petrography: (A. Irving and S. Kuehner, UWS) Breccia consisting of relatively small clasts of ophitic-textured basaltic eucrite (with variable grain size) in a fairly abundant matrix composed of mostly fine grained, related crystal debris plus larger grains of heavily oxidized metal (which also occur in some lithic clasts). Minerals are exsolved pigeonite, anorthitic plagioclase, silica polymorph, altered Ni-free metal, ilmenite, rare altered troilite and very rare zircon (as inclusion in ilmenite). Geochemistry: Orthopyroxene (Fs66.9-67.3Wo1.5-1.4, FeO/MnO = 30-31), clinopyroxene exsolution lamellae (Fs39.3-44.6Wo32.8-26.3, FeO/MnO = 31-32). Classification: Eucrite (monomict breccia) Specimens: 20 g of sample and two polished thin sections are on deposit at UWB. JAaronson holds the main mass. | ||||||||||||||||||||||||||||
Data from: MB102 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) UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023) Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010) JAaronson: Joe Aaronson, 8124 Blaikie Ct., Sarasota, FL 34240, United States (private address; updated 3 Jun 2013) |
||||||||||||||||||||||||||||
Catalogs: |
| ||||||||||||||||||||||||||||
References: | Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
| ||||||||||||||||||||||||||||
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.
|