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| Northwest Africa 14505 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 14505 This is an OFFICIAL meteorite name. Abbreviation: NWA 14505 Observed fall: No Year found: 2005 Country: Morocco Mass:  24.4 kg | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 583 approved meteorites (plus 1 unapproved name) classified as CV3. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites | ||||||||||||||||||||||||||||||
| Comments: | Approved 15 Dec 2021 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 110:
Northwest Africa 14505 (NWA 14505) Morocco Purchased: 2005 Classification: Carbonaceous chondrite (CV3) History: Sample was purchased from A. Aaronson at the Denver Show in 2005who acquired it from Morocco. Sample is catalogued at the Royal Ontario Museum as M59753 Physical characteristics: Large single specimen displaying moderate desert polish modification to fusion crust (2/3 of its surface) and weathered broken surfaces. Chondrules and CAIs readily visible. Several subparallel weathered 1 mm fractures pass through the meteorite. Petrography: Cut endpiece surfaces and a thin section show abundant, well defined chondrules (40 vol%) with average diameter 0.72 mm (n = 28), set in a dark-gray matrix (55 vol%) which also contains CAIs (<5 vol%) and 5 vol% AOAs. Porphyritic (PO, POP) chondrules are most common. Olivine in chondrules exhibits sharp extinction. In BSE images, olivine commonly shows Fe-Mg zoning. Metal is absent, and magnetite occurs as subhedral inclusions in chondrules and as rounded clusters (up to 30 micrometres) of finer grains in the matrix. Geochemistry: EPMA: Olivine: Fa25.04±18.14 (n=30), with chondrule olivine: Fa8.20±10.90 (n=11); Ca-poor pyroxene: Fs1.60±0.95 En97.55±0.89 Wo0.85±0.21 (n=17); Ca-rich pyroxene: Fs0.94±0.37En58.08±4.26Wo40.98±4.32 (n=12). Magnetite compositions (wt%): Cr2O3=1.33±0.33, TiO2=0.03±0.01, NiO=0.07±0.04, Al2O3=1.06±0.27 (n=22) Classification: CV3 (S1) Moderately Weathered: Chondrule size, abundance,chondrule olivine compositions with Fa<15, and magnetite compositions indicate that this meteorite is a CV3 and not CK. Specimens: Type specimen: ROM. Main mass: D. Gregory | ||||||||||||||||||||||||||||||
| Data from: MB110 Table 0 Line 0: |
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| Institutions and collections |
ROM: Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada (institutional address; updated 18 Oct 2011) Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010) DGregory: David Gregory, 230 First Avenue, Suite 108, St. Thomas, Ontario N5R 4P5, Canada (private address) |
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| References: | Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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Geography:
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Statistics: This is 1 of 1837 approved meteorites from Morocco (plus 24 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||