![]() |
||
|
Northwest Africa 7677 | |||||||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Basic information | Name: Northwest Africa 7677 This is an OFFICIAL meteorite name. Abbreviation: NWA 7677 Observed fall: No Year found: 2012 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 507 approved meteorites classified as Diogenite. [show all] Search for other: Achondrites, Diogenites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 3 Jun 2013 | ||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 102:
Northwest Africa 7677 (NWA 7677) (Northwest Africa) Purchased: 2012 Aug Classification: HED achondrite (Diogenite) History: Purchased by Eric Twelker in August 2012 from a dealer in Agadir, Morocco. Petrography: (A. Irving and S. Kuehner, UWS) Fresh specimen with cataclastic or mortar texture. Composed predominantly of orthopyroxene (Fs24.8-25.3Wo4.8-4.3, FeO/MnO = 27-29) with accessory clinopyroxene (Fs11.2-11.3Wo44.0-43.6, FeO/MnO = 19-20), anorthite, chromite, troilite and slightly stained Ni-free metal. Geochemistry: Orthopyroxene (Fs24.8-25.3Wo4.8-4.3, FeO/MnO = 27-29), clinopyroxene (Fs11.2-11.3Wo44.0-43.6, FeO/MnO = 19-20). Classification: Diogenite. Although no olivine was found in the studied thin section, this specimen is likely paired with NWA 7464, NWA 7599 and other stones from the same find site. Specimens: A total of 23.3 g of sample and one polished thin section are on deposit at UWB. The remaining material is held by Twelker. | ||||||||||||||||||||||||||||
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, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012) Twelker: Eric Twelker, P.O. Box 844, Port Townsend, WA 98368, United States; Website (private address; updated 1 Dec 2014) |
||||||||||||||||||||||||||||
Catalogs: |
| ||||||||||||||||||||||||||||
References: | Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
| ||||||||||||||||||||||||||||
Geography: |
Statistics: This is 1 of 8890 approved meteorites from (Northwest Africa) (plus 1871 unapproved names) |