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
A.A. Sorokin1, V.A. Ponomarchuk2, A.V. Travin2, L.I. Rogulina1, A.V. Ponomarchuk2
1Institute of Geology and Nature Management, Far Eastern Branch of the Russian Academy of Sciences, per. Relochnyi 1, Blagoveshchensk, 675000, Russia
2V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia
Keywords: Geodynamics, granites, Mesozoic, Berezitovoe deposit, Selenga–Stanovoy superterrane
Abstract
The age of the major igneous complexes in the western part of the Selenga–Stanovoy superterrane has been estimated by 40Ar/39Ar 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.
DOI: http://dx.doi.org/10.1016/j.rgg.2014.01.015
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