Meteoritical Bulletin: Entry for Northwest Africa 15888

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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: 2.48 kg

Classification
history:

Meteoritical Bulletin:	MB 112	(2023)	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

help

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 (Fa_31.2±0.3, range Fa_30.1-31.9, NiO=0.5±0.1 wt. %, n=38), Low-Ca Pyroxene (Fs_26.5±0.2Wo_0.6±0.1, range Fs_26.4-26.6Wo_0.5-0.6, n=2), Augite (Fs_15.3±2.7Wo_48.1±0.9, range Fs_11.1-19.4Wo_46.5-49.5, 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:
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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)

Also see:

This lists the most popular meteorites among people who looked up this meteorite.

Revision
history:

This lists important revisions made to data for this record.

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