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Cassiterite U-Pb (ID-TIMS) age constraints on the timing of tin mineralization in the Okhotsk-Chukotka volcanic belt, Chukotka area, Russian Far Eastстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Tikhomirov P.L., Rizvanova N.G., Polzunenkov G.O., Akinin V.V.
- Журнал: Mineralium Deposita
- Год издания: 2025
- Издательство: Springer Verlag
- Местоположение издательства: Germany
- DOI: 10.1007/s00126-025-01408-1
- Аннотация: We present the first ID-TIMS U-Pb dating results for cassiterite from the 106-79 Ma Okhotsk-Chukotka volcanic belt (OCVB), the major subduction-related igneous province in NE Asia. The three cassiterite samples studied were collected from the Nadezhda prospect and the Khrustalnoe deposit, two key prospects in the Mramornyi mineral district of Central Chukotka area. The cassiterite samples are relatively low in uranium (2.6 to 5.1 ppm) and contain varying amounts of common Pb, with measured 206Pb/204Pb ratios ranging from 48 to 330. The ID-TIMS U-Pb ages obtained are 84.8 ± 0.4 Ma, 83.3 ± 1.0 Ma, and 82.1 ± 1.2 Ma (2σ errors), demonstrating the applicability of ID-TIMS method for dating low-U cassiterite younger than 100 Ma. These ages are consistent with the U-Pb age of zircon from the host rhyolite of the Khrustalnoe deposit (90.7 ± 0.9 Ma). Synthesis of available age data available for tin deposits in Central and North Chukotka indicates their formation during at least three magmatic events associated with three distinct igneous provinces: (1) 147–125 Ma in the subduction-related Central Chukotka belt; (2) 110–100 Ma in the extension-related Chaun igneous province; and (3) 96–79 Ma in the subduction-related OCVB. This suggests that tin mineralization in Chukotka was associated with nearly all major episodes of crustal melting in the region during the Jurassic and Cretaceous periods.
- Добавил в систему: Тихомиров Петр Леонидович