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Northwest Africa 15653 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 15653 This is an OFFICIAL meteorite name. Abbreviation: NWA 15653 Observed fall: No Year found: 2022 Country: Algeria Mass: ![]() | ||||||||||||||||||||||||||||
Classification history: |
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 29 Jan 2023 | ||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 112:
Northwest Africa 15653 (NWA 15653) Algeria Purchased: Jan 2022 Classification: Ordinary chondrite (LL3) History: Purchased January 21, 2022 by William O’Hara of Berthoud, Colorado from Mohamad Adi in Morocco who purchased it from a local fisherman. Physical characteristics: A single brown stone with a sand-polished stone with well defined tightly packed chondrules visible on the exterior with the unaided eye. The main mass shows two areas on the exterior where ~5mm chondrules appear to have been excavated. Saw cut reveals an interior with numoerous chondrules of various sizes with no metal visible. Petrography: (D. Dickens, CCMS) Optical and microprobe examination of polished probe mount and BSE images show an unbrecciated chondritic meteorite with tightly packed well-delineated unequilibrated chondrules (apparent mean diameter ~1088±785 µm, n=11) set in a fine-grained matrix. Rare sulfides and metal observed. Geochemistry: (D. Dickens, CCMS and A. S. Bell, CUB) olivine Fa15.4±8.1, range Fa3.2-23.9, n=20; range Cr2O3 in ferroan olivine 0.01-0.12 wt.%, mean 0.06±0.04 wt.%, n=17; Ca-pyroxene Fs14.4±7.8Wo1.2±0.5, range Fs6.6-22.3Wo0.2-4.1, n=3. Classification: Ordinary chondrite (LL3) Specimens: 20 g on deposit with Cascadia; Main mass with William O’Hara. | ||||||||||||||||||||||||||||
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) CUB: Daniel Ozdín, Mineralogical Museum of Comenius University, Faculty of Natural Sciences, Ilkovicova 6, 842 15 Bratislava, Slovakia (institutional address; updated 2 Dec 2018) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 112, in preparation (2023)
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Geography:![]() |
Statistics: This is 1 of 1315 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters) |