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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
Classification
  history:
Recommended:  LL3    [explanation]

This is 1 of 469 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
Writeuphelp
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:
  MB112
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2020
Mass (g):525
Pieces:1
Class:LL3
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
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)
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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