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| Northwest Africa 14575 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 14575 This is an OFFICIAL meteorite name. Abbreviation: NWA 14575 Observed fall: No Year found: 2014 Country: Morocco Mass:  39.9 g | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 470 approved meteorites (plus 2 unapproved names) classified as CV3. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites | ||||||||||||||||||||||||||||||
| Comments: | Approved 12 Feb 2022 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 111:
Northwest Africa 14575 (NWA 14575) Morocco Purchased: 2014 Classification: Carbonaceous chondrite (CV3) History: Sample was purchased from A. Aaronson in Denver in 2014 who acquired it from Morocco. Sample is catalogued at the Royal Ontario Museum as M58924 Physical characteristics: Irregular individual with no fusion crust but well-developed desert polish-modified broken surfaces showing chondrules and chondrule-sized sockets up to 3 mm diameter. Weathering is low to moderate. Petrography: Interior of the stone revealed by a 4 cm2 cut surface and polished thin section shows well defined chondrules, AOAs and calcium aluminum-rich inclusions set in a dark matrix which occupies 35 vol% of the stone. Chondrules are dominantly intact POP, PO and BO types with igneous rims, with average size 737±268 µm (n=26), occupying 20 vol% of the stone. AOAs are ovoid to irregular objects up to 1200 µm size, occupying 30 vol%. Olivine grains throughout show sharp to undulatory extinction. CAIs are 15 vol%. Accessory phases are troilite as inclusions in some chondrules and magnetite as a phase in matrix and rim material. Geochemistry: EPMA: Olivine: 17.94±16.86 (n=30). Olivine in chondrules: 3.43±2.97 (n=8). Ca-poor pyroxene: Fs6.25±13.06, Wo1.83±1.10 (n=13). Ca-rich pyroxene: Fs1.82±1.76, Wo40.12±4.79 (n=16). Magnetite compositions (wt%): Cr2O3=1.76±0.54, TiO2=0.08±0.2, NiO=0.05±0.07, Al2O3=1.00±0.17 (n=22) Classification: CV3 (S2) low weathering: Chondrule size, PO and POP prevalence, igneous rims, chondrule olivine low Fa composition and magnetite compositions indicate CV chondrite. Specimens: Type specimen: ROM. Main mass: D. Gregory | ||||||||||||||||||||||||||||||
| Data from: MB111 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) |
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| Catalogs: |
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| References: | Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Geography:
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Statistics: This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||
| Also see: |
This lists the most popular meteorites among people who looked up this meteorite.
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| Revision history: |
This lists important revisions made to data for this record.
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