Volcanogenic belts of the marginal sea lithosphere in the Russian Northeast and their ore potential

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 Creta ceous/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 Cen tral 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 activa tion (TMA) form the world largest metallogenic province with a polychronous volcanogenic-plutonogenic metallization of various compositions.

Detrital Zircon U-Pb Data for Jurassic–Cretaceous Strata from the South-Eastern Verkhoyansk-Kolyma Orogen—Correlations to Magmatic Arcs of the North-East Asia Active Margin

“…This is consistent with zircon (U-Th)/He thermochronometric data from the southern part of the Prikolyma Terrane, confirming an episode of rapid cooling and exhumation at 137 Ma [110]. The Omsukchan basin most likely represented an Early Cretaceous [95][96][97][98] small rift, oriented orthogonal to the Uda-Murgal arc. In contrast to the Jurassic deposits of the Sugoi basin, the Lower Cretaceous strata of the Omsukchan basin do not contain abundant Middle Jurassic zircons, implying that erosion of Jurassic sedimentary strata and coeval volcanics did not extensively contribute to the clastic provenance in the Early Cretaceous.…”

“…In contrast, Parfenov [3], Kuznetsov, and Livach [92] interpreted the Omsukchan basin as a piggy-back basin with the Verkhoyansk-Kolyma orogenic belt. However, most recent studies have considered the basin as rift-related [93][94][95][96][97][98].…”

О Поперечной Петрогеохимической Зональности Мезозойских Вулканитов В Рудных Полях Забайкальского Сегмента Монголо-Охотского Складчатого Пояса

“…Во фронтальной зоне вулканических дуг локализуются золоторудные проявления, в тыловых частях вулканической дуги -полиметаллические месторождения [16,17]. Образование поперечной геохимической зональности объясняется увеличением глубины погружения субдуцируемой плиты [5].…”