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Northwest Africa 15855
Basic information Name: Northwest Africa 15855
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15855
Observed fall: No
Year found: 2020
Country: Western Sahara
Mass:help 1788 g
Recommended:  CV3    [explanation]

This is 1 of 624 approved meteorites (plus 1 unapproved name) classified as CV3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 11 Apr 2023
Writeup from MB 112:

Northwest Africa 15855 (NWA 15855)

Oued Ed-Dahab, Western Sahara

Find: 2020

Classification: Carbonaceous chondrite (CV3)

History: Eight pieces were found by Nomads in the Sahara Desert close to the town of Bir Anzerane, Oued Ed-Dahab Province in the region of Dakhla-Oued Ed-Dahab, Western Sahara. The two large pieces, weighing 864 and 495 g both had fusion crust along one side. They were subsequently purchased by a Moroccan dealer in Erfoud in April 2021 and sold to Sean Mahoney & Miguel Angel Contreras Gomez.

Physical characteristics: The 8 pieces comprise the partially crusted main mass of 864 g (Sean Mahoney), a partially crusted piece of 498 g (Miguel Angel Contreras Gomez) and 6 other small pieces (Miguel Angel Contreras Gomez).

Petrography: (D. Sheikh, Cascadia) Sample is comprised of mm-sized chondrules and refractory inclusions (Av. ~ 1 mm, ~50 vol. %) set within a fine-grained matrix (~50 vol. %) containing accessory chromite and Fe-Ni metal.

Geochemistry: Olivine (Fa28.7±19.5, range Fa1.9-65.7, n=47), Low-Ca Pyroxene (Fs2.4±1.7Wo2.2±1.1, range Fs1.2-4.4Wo1.5-3.2, n=6).

Classification: Carbonaceous Chondrite (CV3)

Specimens: 24.3 g at Cascadia, main mass with Sean Mahoney and Miguel Angel Contreras Gomez.

Data from:
  Table 0
  Line 0:
State/Prov/County:Oued Ed-Dahab
Origin or pseudonym:Nearby to Bir Anzerane
Mass (g):1788
Shock stage:low
Weathering grade:low
Fayalite (mol%):28.7±19.5
Ferrosilite (mol%):2.4±1.7
Wollastonite (mol%):2.2±1.1
Classifier:D. Sheikh, Cascadia
Type spec mass (g):24.3
Type spec location:Cascadia
Main mass:Sean Mahoney and Miguel Angel Contreras Gomez
Comments:CML 1629; OSM006; 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 Meteoritical Bulletin, no. 112, in preparation (2023)
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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Andreas Möller   

Western Sahara

     This is the only approved meteorite from Oued Ed-Dahab, Western Sahara
     This is 1 of 272 approved meteorites from Western Sahara (plus 20 unapproved names)

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