Ore-forming specialty of the tectono-magmatic zone in Nanling region and its emplacement dynamics for metallogenic series of W-Sn polymetallic deposits

Abstract： The Nanling tectono-magmatic zone constitutes the primary body of the great South China granite province. As a multiple-source large-sized tectono-magmatic zone in the great granite province，it was probably formed by the same result achieved from the mantle-rooted continental crust in the intra-continent and the ocean crust of Izanagi （Ancient Pacific Ocean） subducted along the continental margin. The formation of multiple tectono-magma and the tectono-dynamic effects of the emplacement as well as their contact structural systems are closely related to the specialty of a certain tectonic magma and an established metallogenic series. Based on the universal model for the tectonic dynamic effect of magmatic emplacement， this paper puts forward the opinion that the Xiangnan sub-metallogenic series of Xianghualing-Shizhuyuan- Furong-Huangshaping mineral deposits might have been formed on the structural pattern of the ortho-proximal contact zone by strong initiative dynamic effect, the Gannan sub-metallogenic series of Dajishan-Xihuashan mineral deposits might have resulted from the structural pattern of the ortho-proximal contact zone by weak initiative dynamic effect, and the Guixibei sub-metallogenic series of Lamo-Dachang mineral deposits were likely formed on the structural pattern of reversed lying anticline structural pattern on the proximal-distant contact zone by fairly strong initiative dynamic effect. It is pointed out that the magmatic emplacement contact system is only a prerequisite for ore-forming space, and that only through detailed studies of the cooling rate and heating effect of magmatic bodies and geochemical kinetic effects of ore-forming metals can the metallogenic intensity and availability be deeply understood.