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Northwest Africa 7915 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 7915 This is an OFFICIAL meteorite name. Abbreviation: NWA 7915 Observed fall: No Year found: 2010 Country: Morocco Mass: 415 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 3298 approved meteorites (plus 1 unapproved name) classified as LL5. [show all] Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||
Comments: | Approved 25 Jun 2013 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 102:
Northwest Africa 7915 (NWA 7915) Morocco Purchased: 2010 Classification: Ordinary chondrite (LL5) History: Purchased by T. Jakubowski from Moroccan dealer in Erfoud; 69 g was cut off and studied by M. Brawata as part of an MSc project supervised by R. Kryza. Physical characteristics: Single stone (415 g) covered by black fusion crust with rollover lips preserved at one side. Petrography: Chondrule types include PO, BO, RP, CC, GOP; mostly well-defined. Chondrule diameters 0.4 to 4.0 mm, average 0.96 mm. Opaque minerals (15 vol %) include troilite, taenite and rare chromite. Kamacite replaced by iron hydroxide. Taenite grains slightly weathered. Small feldspar grains discernable in electron image; accessory apatite. Rare planar fractures in olivine and pyroxene; undulatory extinction of pyroxene in radial-pyroxene chondrules. Geochemistry: (R. Kryza, M.Brawata and J. Ćwiąkalski, WrocU): Olivine Fa29.1, pyroxene Fs24.1Wo2.0, feldspar An24.7Ab71.9Or3.5, chromite (Mg0.1Fe2+0.96Mn0.01Zn0.01Si0.02Ti0.1) (Al0.23, Fe3+0.02Cr1.52)O4 and taenite with 25.50 wt% Ni and Co 1.67 wt%. Classification: Ordinary chondrite LL5 S2 W3 Specimens: Main mass is held by T. Jakubowski. 42 g and three thin sections at WrocU. | ||||||||||||||||||||||||||||||
Data from: MB102 Table 0 Line 0: |
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Institutions and collections |
UTWroc: Wroclaw University of Technology, Faculty of Geoengineering Mining and Geology, Institute of Minings, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland (institutional address) WrocU: Wroclaw University, Institute of Geological Sciences, ul. Cybulskiego 30, 50-205 Wroclaw, Poland (institutional address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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Geography: |
Statistics: This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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