The Yangchuling porphyry W-Mo-deposit is a new-type tungsten deposit discovered recently in southern China. Being of certain economic significance, this type of deposits promises some new prospects for the availability of increasing tungsten resource. The ore-bearing rock mess, intermediate to acid in composition, is a composite rock body resulted from comagmatic, multiple-stage intrusion during Middle-Late Yanshan Period. Spatially, the rock mass is controlled by the Guangji-Anqing-Nanjing deep fault. As a typical porphyry deposit, the ore-bearing rocks (granodiorite porphyry,mozonitic granite porphyry, and camouflage breccia) belong to sub-volcanic facies characteristic of near-surface environment. The rocks have suffered, strong hydrothermal alteration which is closely related to mineralization. The deposit is classified as mesoepithermal deposit and our study shows that W and Mo come from the granodiorite,granodiorite porphyry and mozonitie granodiorite porphyry, which are believed to be derived through remelting from some W-rich basement roeks contaminated with minor amounts of upper mantle material.
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