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Northwest Africa 7516 | |||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 7516 This is an OFFICIAL meteorite name. Abbreviation: NWA 7516 Observed fall: No Year found: 2012 Country: Morocco Mass: ![]() | ||||||||||||||||||||||||
Classification history: |
This is 1 of 569 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||
Comments: | Approved 18 Nov 2012 | ||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 101:
Northwest Africa 7516 (NWA 7516) Morocco Purchased: Aug 2012 Classification: HED achondrite (Eucrite) History: Purchased by Adam Bates from a meteorite dealer in Morocco, August, 2012. Physical characteristics: Single stone, shiny black fusion crust. Saw cut reveals, fresh, light gray, fine-grained texture; friable. Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous zoned pyroxenes, with a minor amount of generally smaller pyroxenes with exsolution lamellae. Ophitic to granular to cataclastic texure, approximately 60% pyroxene and 30% plagioclase. Scattered mesostasis, silica, chromite, ilmenite, troilite, and low-Ni iron metal; some fayalitic olivine on pyroxene grain boundaries. Geochemistry: (C. Agee and M. Spilde, UNM) Pyroxene Fs43.1±7.7Wo8.8±4.7, Fe/Mn=32±2, n=32; plagioclase An90.0±11.9, n=4. Classification: Achondrite (eucrite), unequilibrated basaltic eucrite, zoned pyroxenes show a Pasamonte type trend, also a few pyroxenes with exsolution lamellae suggest the presence of a second, equilibrated, eucrite lithology. Specimens: 15.4 g including a probe mount on deposit at UNM, Adam Bates holds the main mass. | ||||||||||||||||||||||||
Data from: MB101 Table 0 Line 0: |
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Institutions and collections |
UNM: Institute of Meteoritics
MSC03 2050
University of New Mexico
Albuquerque NM 87131-1126
USA, United States; Website (institutional address; updated 12 Feb 2015) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 101, MAPS 50, 1661, September 2015
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Geography:![]() |
Statistics: This is 1 of 1932 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater) |