The Sora porphyry Cu-Mo deposit (Kuznetsk Alatau): magmatism and effect of mantle plume on the development of ore-magmatic system |
| |
Authors: | AP Berzina AN Berzina VO Gimon |
| |
Institution: | aV.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia |
| |
Abstract: | Several complexes are recognized within the Sora porphyry Cu-Mo deposit: plutonogenic, porphyry (ore-bearing), and dike. They formed since Ordovician till Devonian at the collision, postcollisional, and rift stages of the regional evolution, respectively. Magmatism was manifested at the deposit synchronously with intraplate magmatism, which was widespread within Kuznetsk Alatau and was initiated by the Altai–Sayan mantle plume. In structural position and geochemical characteristics the dike complex is similar to the intraplate complexes in adjacent regions. It formed after the development of the Sora ore-magmatic system including the plutonogenic and porphyry complexes with similar geochemistry and metallogeny. According to the models for the relationship of mantle plumes with ore-magmatic systems, the plutonogenic and porphyry complexes of the Sora deposit developed at the stage of the thermal plume effect on lithosphere, which caused its melting and, as a result, calc-alkalic magmatism. A change of the collision and postcollisional geodynamic regime by the rift one favored the ascent of plume melts, which then participated in the formation of intraplate structures, in particular, the dike complex of the Sora deposit. |
| |
Keywords: | Sora porphyry Cu-Mo deposit ore-magmatic systems mantle plume geochemistry of basaltoid and granitoid magmatism Sr-Nd-Pb isotopy of igneous rocks sources of basaltic and granitic magmas subduction fluids Kuznetsk Alatau |
本文献已被 ScienceDirect 等数据库收录! |
|