Volcanogenic belts of the marginal sea lithosphere in the Russian Northeast and their ore potential |
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Authors: | A A Sidorov A V Volkov A D Chekhov N E Savva V Yu Alekseev K V Uyutnov |
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Institution: | 1.Institute of the Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry,Russian Academy of Sciences,Moscow,Russia;2.Northeast Multidisciplinary Research Institute, Far East Branch,Russian Academy of Sciences,Magadan,Russia |
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Abstract: | According to the concepts of accretionary tectonics, the region of interest was a dynamically evolving active continental
margin during Mesozoic/Cenozoic time; this is reflected in the generation of nine volcano-plutonic belts that successively
evolved from northwest to southeast. Most of these evolved in parallel with the present-day location of the Kuril-Kamchatka
deep-sea trench: the Late Jurassic/Early Cretaceous Uda-Murgali belt (UMVB) the Uyandina-Yasachnaya (UYVB), the Oloi belt
(OVB), the Late Cretaceous/Paleogene Okhotsk-Chukchi belt (OChVB), the Late Cretaceous/Paleogene East-Sikhote-Alin’ belt (ESVB),
the Eocene/Oligocene Koryak-West-Kamchatka belt (KWKVB), the Oligocene/Quaternary Central Kamchatka belt (CKVB), and the Pliocene/Quaternary
East Kamchatka belt (EKVB). The successively younger age of the volcanic belts since the Early Cretaceous is in correspondence
with the displacement of the volcanic arc-trench system toward the Pacific Ocean. Apart from the above-mentioned volcanogenic
belts, the Omolon craton terrane also contains the pre-accretionary Devonian Kedon marginal volcanogenic belt (KVB). All the
volcanogenic belts and the surrounding perivolcanic zones of tectono-magmatic activation (TMA) form the world-largest metallogenic
province with a polychronous volcanogenic-plutonogenic metallization of various compositions. |
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