Age constraints and tectonic settings of metallogenic and magmatic events in the Verkhoyansk–Kolyma folded area

Abstract

The paper presents new isotope geochronological data for several mineral deposits, ore occurrences, and related igneous bodies (plutons and dikes) in the Verkhoyansk–Kolyma folded area, eastern Yakutia. Twenty-one 40Ar/39Ar mica and four U–Pb zircon dates provide the first age constraints on key metallogenic units in the area. The dating results allow correlation between tectonic, magmatic, and metallogenic events. The sampled mineral deposits within the Adycha–Taryn fault zone in the southeastern Verkhoyansk–Chersky orogen apparently formed at the Jurassic–Cretaceous boundary during the final phase of the collision between the Siberian (North Asian) craton and the Kolyma–Omolon microcontinent (Kupol’noe deposit and the early metallogenic pulse of the Malotarynskoe deposit, ~ 143–144 Ma) and in the latest Early Cretaceous, in the beginning of the orogen collapse (Tallalakh and Dora-Pil’ deposits and the Malotarynskoe late metallogenic pulse, ~ 126 Ma). According to the suggested new classification of metallogenic units, these deposits belong to the Late Jurassic–Early Cretaceous Yana–Kolyma metallogenic belt. The Kyuchus deposit (~ 106 Ma), the Deputatsky ore cluster (~ 106–113 Ma), and the Khotoidokh deposit (~ 116 Ma) in the northern Verkhoyansk–Kolyma folded area belong to the North Verkhoyansk metallogenic belt. Their origin was associated with accretional and collisional processes that produced the Novosibirsk–Chukotka orogen in the middle Cretaceous. The Mangazeya ore cluster (~ 100 Ma, Early–Late Cretaceous boundary) in the southwestern end of the North Tirekhtyakh magmatic transverse belt belongs to the West Verkhoyansk metallogenic belt. The Nezhdaninskoe, Zaderzhnoe, Kurum, and Kuta deposits of the South Verkhoyansk area (~ 125–120 and ~ 100–95 Ma) can be joined into a single Verkhoyansk–Okhotsk metallogenic belt. The belt resulted from accretion and collision along the East Asian active continental margin and the related formation of the South Verkhoyansk orogen in the Early Cretaceous.

Granitoids of the Ergelyakh Intrusion-Related Gold–Bismuth Deposit (Kular-Nera Slate Belt, Northeast Russia): Petrology, Physicochemical Parameters of Formation, and Ore Potential

“…This is discussed in detail in [6], where a conclusion is made that formation of the EIRGD granitoids occurred in the time interval 160-145 Ma with the subsequent cooling of the thermal field until 136 Ma. These results are in agreement with Ar-Ar ages of the Ergelyakh pluton (biotite, 142.9 ± 0.4 Ma [50]) and Rb-Sr ages of the Samyr and Kurdat plutons (bulk sample, 140-145 Ma [10]) and other intrusives of the Tas-Kystabyt plutonic belt [50,51].…”

Tectonic evolution of the northern Verkhoyansk Fold-and-Thrust Belt: insights from palaeostress analysis and U–Pb calcite dating

“…This stage is recognized throughout the northern and eastern margins of the Siberian Craton, but its intensity varies. In the South Verkhoyansk sector, it corresponds to the final stages and termination of the main deformation event (Malyshev et al 2018;Prokopiev et al 2018a).…”

“…Beaudoin et al 2018Beaudoin et al , 2020Hansman et al 2018; Parrish et al Prokopiev & Deikunenko, 2001, modified). Age of intrusions after Prokopiev et al (2009Prokopiev et al ( , 2013Prokopiev et al ( , 2018a, Gertseva et al (2016) and Shishkin et al (2017).…”

The Kis-Kuel Fe-Cu-Au±(Ag, Mo, Bi) deposit, Eastern Yakutia (Russia) – a link between Iron Oxide Copper-Gold and Intrusion Related Gold systems

“…The formation of the Verkhoyansk fold-and-thrust metallogenic belt included several stages (Prokopiev et al, 2018):…”