Correlation between the ore formation processes in the Berezitovoe gold-complex-metal deposit (western part of the Selenga-Stanovoy superterrane) and the regional tectonomagmatic events

摘要

The age of the major igneous complexes in the western part of the Selenga-Stanovoy superterrane has been estimated by ~(40)Ar/~(39)Ar dating: trachyandesite-basalts of the Kuitun (Chichatka) complex--259.4 ± 6.2 Ma; gabbro of the Tukuringra complex--156.3 ± 4.8 Ma; granites and pegmatites of the Tukuringra complex--153.1 ± 3.8, 154.0 ± 4.4, 156.8 ± 4.0, and 151.2 ± 3.2 Ma; granodiorites, granites, and leucogranites of the Amudzhikan complex--131.7 ± 2.4, 134.5 ± 2.8, and 131.6 ± 4.2 Ma; and lamprophyre dikes--125.2 ± 2.4 and 125.2 ± 3.4 Ma. Two stages of hydrothermal ore formation process have been recognized: 132-131 and ~125 Ma. It is shown that the deposit formation and superposed processes follow the general regularities of the Late Mesozoic evolution of the Pacific Asia margin.