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Northwest Africa 3155 | |||||||||||||||||||||||
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Basic information | Name: Northwest Africa 3155 This is an OFFICIAL meteorite name. Abbreviation: NWA 3155 Observed fall: No Year found: 2004 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||
Classification history: |
This is 1 of 207 approved meteorites classified as CK5. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites | ||||||||||||||||||||||
Comments: | Approved 1 Sep 2006 | ||||||||||||||||||||||
Writeup![]() |
Writeup from MB 91:
Northwest Africa 3155 Morocco Find: August 2004 Carbonaceous chondrite (CK5) History: Purchased in August 2004 by Greg Hupé from a Moroccan dealer in Tagounite. Physical characteristics: A complete brownish stone with thin fusion crust weighing 878 g. Petrography: (A. Irving and S. Kuehner, UWS) Dispersed but relatively well-formed, recrystallized chondrules in a fine-grained matrix. Abundant olivine, plagioclase, clinopyroxene, and euhedral to subhedral magnetite. Geochemistry: Olivine (Fa30–32), plagioclase (An27.6–35.5Or6.8–4.5), clinopyroxene (Mg/(Mg+Fe) ~0.75), Cr-rich magnetite (Cr2O3 = 5.4–5.7 wt%). Oxygen isotopes: (D. Rumble, CIW) Analyses of two different whole rock fragments by laser fluorination gave, respectively, δ18O = -0.41, -0.46; δ17O = -4.59, -4.54; Δ17O = -4.376, -4.299 (all ‰). Classification: Carbonaceous chondrite (CK5); low shock with moderate weathering. Type specimen: A total of 20 g of sample and one polished thin section are on deposit at UWS. G. Hupé holds the main mass. | ||||||||||||||||||||||
Data from: MB91 Table 2 Line 150: |
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Plots: | O isotopes: | ||||||||||||||||||||||
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) CIW: Carnegie Insitution Washington, Geophysical Laboratory, 5251 Broad Branch Rd., NW, Washington DC 20015, United States (institutional address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 91, MAPS 42, 413-466 (2007)
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Photos: |
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Geography: |
Statistics: This is 1 of 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names) |