Late Vendian postcollisional leucogranites of Yenisei Ridge |
| |
| Authors: | A D Nozhkin I I Likhanov V V Reverdatto T B Bayanova S V Zinoviev P S Kozlov N V Popov N V Dmitrieva |
| |
| Institution: | 1.Sobolev Institute of Geology and Mineralogy, Siberian Branch,Russian Academy of Sciences,Novosibirsk,Russia;2.Geological Institute, Kola Science Center,Russian Academy of Sciences,Apatity,Russia;3.Zavaritsky Institute of Geology and Geochemistry, Ural Branch,Russian Academy of Sciences,Yekaterinburg,Russia;4.Trofimuk Institute of Petroleum Geology and Geophysics, Siberian Branch,Russian Academy of Sciences,Novosibirsk,Russia;5.Novosibirsk National Research University,Novosibirsk,Russia |
| |
| Abstract: | The Late Vendian (540–550 Ma) U–Pb zircon age of postcollisional granitoids in the Osinovka Massif was obtained for the first time. The Osinovka Massif is located in rocks of the island-arc complex of the Isakovka Terrane, in the northwestern part of the Sayany–Yenisei accretion belt. These events stand for the final stage of the Neoproterozoic history of the Yenisei Ridge, related to the completing accretion of the oceanic crust fragments and the beginning of the Caledonian orogenesis. The petrogeochemical composition and the Sm–Nd isotopic characteristics support the fact that the granitoid melt originated from a highly differentiated continental crust of the southwestern margin of the Siberian Craton. Hence, the granite-bearing Late Riphean island-arc complexes were thrust over the craton margin at a distance considerably exceeding the dimensions of the Osinovka Massif. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
