ANALYSIS OF GEOLOGICAL CHARACTERISTICS AND ORE-CONTROLLING FACTORS OF DACHANGAO AU-FE-CU-PB-ZN DEPOSIT IN YUNNAN PROVINCE
The Dachangao Au-Fe-Cu-Pb-Zn deposit is located in the near-core part of the Hetaoping anticline,and in the contact zone between the first member of the Shahechang Formation and the third member of the Hetaoping Formation.It has a trinity ore-controlling law of'stratum(lithology)+structure+magmatic activity'.The upper part of the ore body is controlled by the nearly north-south fault,and the'fault control'type deposit is formed.The lower part is controlled by the Shahechang Formation and the contact surface with the Hetaoping Formation,as well as different lithological structural planes of the Hetaoping Formation,resulting in the formation of'layer controlled'type deposits.The surface and north of the mining area are Au-Pb-Zn ore bodies,and the underground and south are Cu-Pb-Zn ore bodies.It is a hydrothermal-skarn composite deposit related to tectonic-magma hydrothermal fluid.
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