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Early Mesozoic Volcanism of the Orkhon Depression System (Northern Mongolia) and Its Correlation with Formation of the Erdenet Cu–Mo Depositстатья
Информация о цитировании статьи получена из
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 23 января 2026 г.
- Авторы: Yarmolyuk V.V., Kozlovsky A.M., Novikova A.S., Salnikova E.B., Ivanova A.A., Travin A.V., Plotkina Y.V., Erdenezhargal Ch
- Журнал: Doklady Earth Sciences
- Том: 525
- Год издания: 2025
- Издательство: Maik Nauka/Interperiodica Publishing
- Местоположение издательства: Russian Federation
- Номер статьи: 22
- DOI: 10.1134/S1028334X2560851X
- Аннотация: Early Mesozoic endogenic products in the Northern Mongolia as the large Erdenet Cu–Mo deposit and volcanism of the Orkhon depression system are spatially related. However, their temporal and genetic link is still unknown. This paper focuses on geochronological and geochemical studies of volcanic rocks of the Mogod Formation in the Mogod, Khushig–Under, and Bugat depressions and their comparison with ore-bearing intrusive rocks from the Erdenet Cu–Mo deposit. The Mogod Formation mostly includes basaltic trachyandesites and trachyandesites with subordinate trachytes. The age of volcanism was estimated by the U–Pb CA ID TIMS age of zircon from trachytes of the Bugat depression (236 ± 1 Ma) and the 40Ar–39Ar age of amphibole from basaltic trachyandesites of the Khushig–Under (230 ± 6 Ma) and the Mogod (233 ± 4 Ma) depressions. This age interval coincides with the final stage of ore-bearing porphyry magmatism of the Erdenet deposit, which is located in the eastern side of the Bugat depression. Geochemical comparison of the Mogod Formation and the porphyry complex revealed common signatures of both mafic and felsic rocks: a depletion in heavy rare earth elements, Nb, Ta, and Ti, as well as a significant enrichment in Ba, light rare earth elements, and Sr. Our geological, geochronological, and geochemical data indicate that ore-related Cu–Mo magmatism and widespread volcanism of the Mogod Formation are the part of a common magmatic event.
- Добавил в систему: Новикова Анна Сергеевна