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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
Classification
  history:
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
Writeuphelp
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:
  MB112
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2021
Mass (g):2479
Pieces:2
Class:CK5/6
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
Institutions
   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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 112, in preparation (2023)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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