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Northwest Africa 15855 | |||||||||||||||||||||||||||||||||
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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: ![]() | ||||||||||||||||||||||||||||||||
Classification history: |
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![]() |
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: MB112 Table 0 Line 0: |
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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) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 112, in preparation (2023)
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Photos: |
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Geography:![]() |
Statistics: 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) |