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Northwest Africa 13089
Basic information Name: Northwest Africa 13089
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13089
Observed fall: No
Year found: 2019
Country: Morocco
Mass:help 479 g
Meteoritical Bulletin:  MB 109  (2021)  LL5
Recommended:  LL5    [explanation]

This is 1 of 3305 approved meteorites (plus 1 unapproved name) classified as LL5.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 18 Jan 2020
Writeup from MB 109:

Northwest Africa 13089 (NWA 13089)


Purchased: 2019 Mar 27

Classification: Ordinary chondrite (LL5)

History: Purchased in Morocco by a friend of Mr. Jason Phillips, who sent a half of the stone to Mr. James Tobin, who sent pieces to the Cascadia for classification.

Physical characteristics: Cascadia received two slices; an abraded, bumpy exterior is visible along the slices’ edges. Cut faces show readily distinguished, mainly dark-colored chondrules and flecks of metal and sulfide set in an orange-brown background.

Petrography: (M. Hutson and A. Ruzicka, Cascadia): Chondrules are readily distinguished, and many are surrounded by partial rims of mainly sulfide. Albitic feldspar grains up to 20 microns across are present. In addition to single grains, chromite-plagioclase-rich mesostases were observed in several chondrules.

Geochemistry: Mineral compositions and geochemistry: Olivine and pyroxene grains are equilibrated: Fa29.0±0.2, N=36; Fs23.7±0.3Wo1.4±0.4, N=26. Limited data were collected on feldspars in two areas: Ab85.2±3.0An10.3±1.7Or4.5±1.8, N=5.

Classification: Ordinary chondrite (LL5) based on olivine fayalite and pyroxene ferrosilite contents, and feldspar grain size.

Specimens: Cascadia holds 24.3 g in two pieces, in addition to a polished thin section and a mounted butt. The main mass was divided in half: Jason Phillips holds 219.1 g; James Tobin holds 218.6 g.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2019 Mar 27
Mass (g):479
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):29.0±0.2 (N=36)
Ferrosilite (mol%):23.7±0.3 (N=26)
Wollastonite (mol%):1.4±0.4 (N=26)
Classifier:M. Hutson and A. Ruzicka, Cascadia
Type spec mass (g):24.3
Type spec location:Cascadia
Main mass:JPhillips and JTobin
Comments:Lab number CML 1169; submitted by Melinda Hutson
   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)
Tobin: J. Tobin, The Meteorite Exchange, PMB #455, P.O. Box 7000, Redondo Beach, CA 90277, United States (private address)
JTobin: The Meteorite Exchange, Inc., United States; Website (private address; updated 28 Aug 2013)
References: Published in Gattacceca J., McCubbin F. M., Grossman J., Bouvier A., Bullock E., Chennaoui Aoudjehane H., Debaille V., D’Orazio M., Komatsu M., Miao B. and Schrader D. L. (2021) The Meteoritical Bulletin, No. 109. Meteoritics & Planetary Science 56, 1626–1630.
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     This is 1 of 2094 approved meteorites from Morocco (plus 32 unapproved names) (plus 1 impact crater)

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