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Northwest Africa 7547 | |||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 7547 This is an OFFICIAL meteorite name. Abbreviation: NWA 7547 Observed fall: No Year found: 2012 Country: Morocco Mass: ![]() | ||||||||||||||||||||||||
Classification history: |
This is 1 of 272 approved meteorites classified as Eucrite-mmict. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||
Comments: | Approved 12 Dec 2012 | ||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 101:
Northwest Africa 7547 (NWA 7547) Morocco Purchased: Aug 2012 Classification: HED achondrite (Eucrite, monomict) History: Purchased by Adam Bates from a meteorite dealer in Morocco, August, 2012. Physical characteristics: Single stone, weathered green-gray fusion crust. Saw cut reveals, fresh, light gray, fine-grained texture, some small dark clasts. Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows two textural domains, a coarser grained host texture, and scattered very fine grained clasts up to 4mm. This is a monomict breccia based on similar pyroxene compositional range in both host and clasts. Pyroxenes show very fine exsolution lamellae, with some faint rim zonation. Ubiquitous silica, ilmenite, troilite, and minor zircon. Geochemistry: (C. Agee and M. Spilde, UNM) EMPA. Pyroxene Fs53.2±7.3Wo12.1±9.2, Fe/Mn=34±2, n=20; plagioclase An90.0±4.8, n=4. Classification: Achondrite (Eucrite-mmict), pyroxene compositions display Type 4 pyroxenes. Specimens: 21.2 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) |