The Morphological Features of the Qitianling Granitic Pluton: Constrains from Magnetotelluric Data in Southern Hunan

Abstract As one of the most important granites within southern Hunan, the Qitianling pluton controlled the formation and distribution of a series of polymetallic deposits, including Furong Sn deposit, Huangshaping Pb-Zn deposit, and Xintianling W-Mo deposit. Therefore, a further knowledge of morphological features of this pluton that can lead to a better understanding of development and evolution of deposits system of southern Hunan. In this study, we obtained the 3-D electrical resistivity model of the Qitianling pluton and its surrounding area based on 25 MT data, distinctly imaging the subsurface extent of this pluton. The results indicated that the Qitianling pluton exhibited an prominent high-resistance background (>1000 Ω.m), with a downward convexity extending to a depth of ∼ 5 km.