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Northwest Africa 16089
Basic information Name: Northwest Africa 16089
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 16089
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 182 g
Meteoritical Bulletin:  MB 112  (2024)  CK5
Recommended:  CK5    [explanation]

This is 1 of 220 approved meteorites classified as CK5.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Comments: Approved 3 Sep 2023
Writeup from MB 112:

Northwest Africa 16089 (NWA 16089)

(Northwest Africa)

Purchased: 2021

Classification: Carbonaceous chondrite (CK5)

History: Purchased from Ali Hnini by Matthew Stream in 2021.

Physical characteristics: Single stone with dark brown fusion crust.

Petrography: (D. Sheikh, Cascadia) Sample is a breccia comprised of chondrules (~0.9 mm) and mm-sized rounded clasts/clast fragments set within a dark, recrystallized matrix. Mineral phases identified include Ni-bearing olivine, low-Ca pyroxene, high-Ca pyroxene, Cr-bearing magnetite, secondary recrystallized feldspar (~30 microns), chromite, and pentlandite.

Geochemistry: Olivine (Fa33.8±0.4, range Fa33.4-35.1, NiO wt. % = 0.6±0.1, n=41), Low-Ca Pyroxene (Fs28.2±0.3Wo0.9±0.1, range Fs27.8-28.5Wo0.8-0.9, n=5), High-Ca Pyroxene (Fs10.9±2.3Wo43.0±2.8, range Fs6.4-13.2Wo40.4-47.1, n=7), Plagioclase (An44.9±11.9, range An30.4-71.6, n=9), Magnetite (Cr2O3 wt. % = 4.7±0.3, TiO2 wt. % = 0.2±0.1, NiO wt. % = 0.4±0.1, n=4).

Classification: Carbonaceous Chondrite (CK5). Olivine, low-Ca pyroxene, and magnetite compositions favor designation as CK; secondary recrystallized feldspar grain sizes appear uniform across clast regions and within the host matrix, suggestive of a type 5 designation.

Specimens: 20.06 g at Cascadia, main mass with Matthew Stream.

Data from:
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2021
Mass (g):182
Shock stage:S2
Weathering grade:low
Fayalite (mol%):33.8±0.4
Ferrosilite (mol%):28.2±0.3, 10.9±2.3
Wollastonite (mol%):0.9±0.1, 43.0±2.8
Classifier:D. Sheikh, Cascadia
Type spec mass (g):20.06
Type spec location:Cascadia
Main mass:Matthew Stream
Comments:CML 1576; 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)
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 9790 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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