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Northwest Africa 15888
Basic information Name: Northwest Africa 15888
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15888
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 2.48 kg
Meteoritical Bulletin:  MB 112  (2024)  CK5/6
Recommended:  CK5/6    [explanation]

This is 1 of 7 approved meteorites classified as CK5/6.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Comments: Approved 29 May 2023
Writeup from MB 112:

Northwest Africa 15888 (NWA 15888)

(Northwest Africa)

Purchased: 2021

Classification: Carbonaceous chondrite (CK5/6)

History: Purchased by Edwin Thompson in 2021 from a meteorite dealer in Agadir, Morocco. Later acquired by Paul Stahura.

Physical characteristics: Two stones with dark fusion crust.

Petrography: (D. Sheikh, Cascadia) Specimen is comprised of chondrules (Av. diameter ~850 μm) set within a fine-grained matrix containing secondary recrystallized plagioclase (Av. grain size ~30 μm in most chondrules, >50 μm in matrix) and accessory sulfide and Cr-bearing magnetite.

Geochemistry: Olivine (Fa31.2±0.3, range Fa30.1-31.9, NiO=0.5±0.1 wt. %, n=38), Low-Ca Pyroxene (Fs26.5±0.2Wo0.6±0.1, range Fs26.4-26.6Wo0.5-0.6, n=2), Augite (Fs15.3±2.7Wo48.1±0.9, range Fs11.1-19.4Wo46.5-49.5, n=11), Magnetite (Cr2O3=4.0±0.2 wt. %, TiO2=0.3±0.1 wt. %, n=5).

Classification: Carbonaceous Chondrite (CK5/6).

Specimens: 25.9 g at Cascadia, main mass with Paul Stahura.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2021
Mass (g):2479
Shock stage:S2
Weathering grade:low
Fayalite (mol%):31.2±0.3
Ferrosilite (mol%):26.5±0.2, 15.3±2.7
Wollastonite (mol%):0.6±0.1, 48.1±0.9
Classifier:D. Sheikh, Cascadia
Type spec mass (g):25.9
Type spec location:Cascadia
Main mass:Paul Stahura
Comments:CML 1516; submitted by Daniel Sheikh
   and collections
Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011)
Thompson: Edwin Thompson, 5150 Dawn St., Lake Oswego, OR 97035, United States (private address)
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Cartier C., Consolmagno G., Goodrich C., Greshake A., Gross J., Joy K. H., Miao B. and Zhang B. (2024) The Meteoritical Bulletin, no. 112. Meteoritics & Planetary Science 59, 1820–1823. ?
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     This is 1 of 9806 approved meteorites from (Northwest Africa) (plus 1855 unapproved names)

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