TY - JOUR

T1 - Geochronology and Geochemistry of Small Granitoid Intrusions in the Western Yana–Kolyma Gold Belt (Northeast Asia)

AU - Fridovsky, V. Yu

AU - Vernikovskaya, A. E.

AU - Yakovleva, K. Yu

AU - Vernikovsky, V. A.

AU - Rodionov, V. N.

N1 - Funding Information: This work was supported according to the plan of the scientific research of the Institute of Diamond and Precious Metal Geology, Siberian Branch, Russian Academy of Sciences, and the Russian Foundation for Basic Research, project nos. 18-05-70035 and 20-05-00360. Publisher Copyright: © 2022, Pleiades Publishing, Ltd.

PY - 2022/2

Y1 - 2022/2

N2 - Data on the petrographic–geochemical and U–Th–Pb geochronological studies of granitoids of the Bukeschensky and Samyrsky massifs of small intrusions complex of the western part of the Yana–Kolyma gold belt are reported. The granitoids intruded terrigenous rocks of the Kular–Nera and Polousniy–Debin terranes and the Verkhoyansk fold and thrust belt. According to the U–Pb geochronological data obtained on zircons (SIMS SHRIMP-II), the granitoids were formed in the Early Cretaceous, in the interval of 144.5–143 Ma. Their geochemical characteristics are similar to the associated Late Jurassic (151–145 Ma) dikes of various composition of the Nera–Bokhapcha complex. The granitoids could have been formed from a mixed source with the participation of mantle (OIB- and E-MORB-type), subduction, or crustal components. The intrusion into the Early Cretaceous granitoids probably contributed to the final processes of migration and localization of gold in the Yana–Kolyma belt. Systems of tectonic faults of different orders, such as longitudinal (northwestern), Adycha–Taryn and others, and faults transverse to them (northeastern), also played in favor of this process.

AB - Data on the petrographic–geochemical and U–Th–Pb geochronological studies of granitoids of the Bukeschensky and Samyrsky massifs of small intrusions complex of the western part of the Yana–Kolyma gold belt are reported. The granitoids intruded terrigenous rocks of the Kular–Nera and Polousniy–Debin terranes and the Verkhoyansk fold and thrust belt. According to the U–Pb geochronological data obtained on zircons (SIMS SHRIMP-II), the granitoids were formed in the Early Cretaceous, in the interval of 144.5–143 Ma. Their geochemical characteristics are similar to the associated Late Jurassic (151–145 Ma) dikes of various composition of the Nera–Bokhapcha complex. The granitoids could have been formed from a mixed source with the participation of mantle (OIB- and E-MORB-type), subduction, or crustal components. The intrusion into the Early Cretaceous granitoids probably contributed to the final processes of migration and localization of gold in the Yana–Kolyma belt. Systems of tectonic faults of different orders, such as longitudinal (northwestern), Adycha–Taryn and others, and faults transverse to them (northeastern), also played in favor of this process.

KW - granitoids

KW - Northeast Asia

KW - U–Pb geochronology

KW - Yana–Kolyma gold belt

UR - http://www.scopus.com/inward/record.url?scp=85129270337&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/50c79ca7-82ee-3748-bc7f-7fb4fabd5059/

U2 - 10.1134/S1028334X22020064

DO - 10.1134/S1028334X22020064

M3 - Article

AN - SCOPUS:85129270337

VL - 502

SP - 14

EP - 20

JO - Doklady Earth Sciences

JF - Doklady Earth Sciences

SN - 1028-334X

IS - 1-2

ER -