Tectonic Stress Field's Characteristic And Its Relationship Of Uranium Mineralization At Dazhou Volcanic Faulted Basin In Quzhou , Zhejiang Province

Dazhou uranium ore field is typical of hydrothermal uranium deposits, and hydrothermal uranium has close relationship with the structure, the formation of storage space of ore and activities of leading tectonic of ore , which primarily determine the deposit's formation and positioning, nevertheless, the formation and evolution of structure are controlled by regional tectonic stress field, ascertaining different periods'direction of tectonic stress field, that is to say, ascertaining the activities of these faults structure. Therefore, this article from this point of view of the tectonic stress field, discussing it's relationship with the uranium mineralization in-depth,revealling the favorable location of uranium mineralization, offering some basis for district-based uranium exploration and mineralization vision prediction.Based on the study of the structural deformation,through strike-dip surveying of field outcropped conjugate shear joints and adopt mathematical statistics to match by stages, combining previous research achievements.and carried out the study of Dazhou volcanic faulted basin paleo-tectonic stress field and the relationship of uranium mineralization. Summed up four main tectonic stress stages: the former Cretaceous tectonic period,Moshishan tectonic period,Qujiang tectonic period,Eocene-Oligocene tectonic period, discussed the control role of the various periods on uranium mineralization, pointed out the latter three tectonic stress stages play a main part in uranium mineralization, tectonic stress field in Moshishan tectonic period prepared ore storage space,tectonic stress field in Qujiang tectonic period prepared ore transmitting space, tectonic stress field in Eocene-Oligocene tectonic period destroyed and transformed the formed ore deposits.