Mineralization Age of Granitoid-Related Ore Deposits in the Southern, Russian Far East

Abstract

K-Ar mineral ages were determined on 22 specimens collected from seven tin and three gold deposits in the southern part of the Russian Far East. Average values obtained in the individual ore deposits are as follows: Sn; Khinganskoe 91.8 Ma, Merekskoe 85.9 Ma, Solnechnoe 86.2 Ma, Pravourmiskoe 91.8 Ma, Vostochnoe 90.3 Ma, Chalba 84.4 Ma, and Tigrinoe 79.4 Ma; and Au; Krinichnoe 79.4 Ma (pre-ore dike), 76.2 Ma (post-ore dike), Askold 83.2 Ma and Maiskoe 57.1 Ma. Thus the tin mineralizations occurred related to late Cretaceous granitic activities and are similar to the tin-bearing tungsten mineralization epoch of Southwest Japan. The gold mineralizations are slightly younger than the tin mineralizations in time, and also similar in age to those of Southwest Japan.