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Northwest Africa 16090
Basic information Name: Northwest Africa 16090
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 16090
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 525 g
Meteoritical Bulletin:  MB 112  (2024)  LL3
Recommended:  LL3    [explanation]

This is 1 of 496 approved meteorites classified as LL3.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 30 Jul 2023
Writeup from MB 112:

Northwest Africa 16090 (NWA 16090)

(Northwest Africa)

Purchased: 2020

Classification: Ordinary chondrite (LL3)

History: Purchased by Matthew Stream in 2020 from a meteorite dealer in Algeria.

Physical characteristics: Single stone with dark brown fusion crust.

Petrography: (D. Sheikh, Cascadia) Sample is comprised of well-defined chondrules (~0.8 mm) set within a slightly opaque, mostly fine-grained matrix. Accessory phases include Fe-Ni metal, troilite, and chromite.

Geochemistry: Olivine (Fa30.6±3.0, range Fa26.4-42.6, n=36), Low-Ca Pyroxene (Fs16.8±5.4Wo0.9±0.9, range Fs6.2-28.9Wo0.1-5.3, n=71).

Classification: Ordinary Chondrite (LL3). Histogram distribution of olivine Fa values (with most grains in the Fa28-31 range) and chondrule sizes suggest designation as LL.

Specimens: 21.55 g at Cascadia, main mass with Matthew Stream.

Data from:
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2020
Mass (g):525
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):30.6±3.0
Ferrosilite (mol%):16.8±5.4
Wollastonite (mol%):0.9±0.9
Classifier:D. Sheikh, Cascadia
Type spec mass (g):21.55
Type spec location:Cascadia
Main mass:Matthew Stream
Comments:CML 1614; 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 9806 approved meteorites from (Northwest Africa) (plus 1855 unapproved names)

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