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Northwest Africa 2633 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 2633 This is an OFFICIAL meteorite name. Abbreviation: NWA 2633 Observed fall: No Year found: 2004 Country: (Northwest Africa) Mass: 600 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 643 approved meteorites (plus 1 unapproved name) classified as CO3. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 8 Feb 2024 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 113:
Northwest Africa 2633 (NWA 2633) (Northwest Africa) Purchased: 2004 Classification: Carbonaceous chondrite (CO3) History: Purchased by Michael Farmer in 2004 from a Moroccan dealer. Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Small well-defined, unequilibrated chondrules (apparent diameter 230±150 µm, N = 25) containing devitrified glass, plus small mineral fragments and small very fine-grained CAI, are set in a fine-grained matrix (~20 vol.%, orange-brown in thin section) containing kamacite, chromite, troilite and minor secondary calcite. Geochemistry: Olivine (Fa27.9±16.2, range Fa0.3-50.9, N = 22; Cr2O3 in ferroan olivine 0.01-0.21 wt.%, mean 0.06±0.06 wt.%, N = 21), low-Ca pyroxene (Fs6.2±2.6Wo2.2±1.4, range Fs2.0-9.3Wo0.6-3.6, N = 6), subcalcic augite (Fs2.2Wo29.1). Classification: Carbonaceous chondrite (CO3). Specimens: 46.2 g including one polished thin section at BrownU; remainder with Farmer. | ||||||||||||||||||||||||||||||
Data from: MB113 Table 0 Line 0: |
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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) BrownU: Joseph Boesenberg Brown University Dept of Earth, Environmental and Planetary Sciences (DEEPS) 324 Brook Street Providence, RI 02912 , United States (institutional address; updated 4 Jan 2024) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 113, in preparation (2024)
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Geography: |
Statistics: This is 1 of 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names) | ||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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