O.V. Petrov, V.V. Shatov (VSEGEI), A.I. Khanchuk, V.V. Ivanov (FEGI FEB RAS), Yu.P. Zmievskiy, V.I. Shpikerman, E.O. Petrov, V.V. Snezhko, A.V. Shmanyak, A.V. Molchanov, V.O. Khalenev, N.V. Shatova, N.V. Rodionov, B.V. Belyatskiy, S.A. Sergeev (VSEGEI)

ON THE PROSPECTS FOR THE DISCOVERY OF NEW MALMYZH-TYPE GOLD-COPPER-PORPHYRY DEPOSITS IN THE LOWER AMUR REGION (FAR EAST, RUSSIA)

The paper discusses new data obtained during mineralogical-petrographic, petrogeochemical, isotope geochronological, and isotope geochemical studies of igneous rocks from the Malmyzh and Gion ore fields. Results of isotope geochronological studies indicate the Late Cretaceous-Cenomanian (97–99 Ma) and Campanian (76–82 Ma) radiological ages of their magmatic crystallization, respectively. Based on a comparative analysis of the studied samples with each other and with igneous rocks from other porphyry deposits of the world, the authors describe results of studying at the secondary ion mass-spectrometer (SIMS) of distribution patterns of trace elements (REE+Y, Hf, Ti, U, Th, Pb) in accessory zircons from igneous rocks of the Malmyzh and Gion ore fields in order to assess their ore potential for gold-copper-porphyry mineralization.
Keywords: trace elements in accessory zircons, gold-copper-porphyry mineralization, Malmyzh and Gion ore fields, Lower Amur region.