TECTONIC CHARACTERISTICS OF THE BAIYANGPING-HUACHANGSHAN ORE BELT,YUNNAN PROVINCE AND ITS ORE-CONTROLLING EFFECT

The Baiyangping ore belt is located in the northern segment of the Lanping-Simao Indosinian-Yanshanian-Himalayan metallogenic belt.The mi neralization occurred on the basis of the Mesozoic marine to continental carbonate formation and clastic formation intercalated with the volcanic formation,and the Himalayan tectonic overthrusting and hydrothermal modification played a dominant role.Study of the ore-field geology and ore-controlling structure in the ore belt indicates that the stratabound plus hydrothermally modified deposits in the area is closely related to ore-controlling structure.