滇西金顶铅锌矿床和蒸发岩建造成因关系的初步探讨

THE PRELIMINARY STUDY OF GENETIC RELATIONSHIP BETWEEN THE EVAPORITE FORMATION AND LEAD-ZINC DEPOSIT OF JINDING IN WEST YUNNAN PROVINCE, CHINA

This paper discusses the relatonship between .Jinding lead-zinc deposit and the times and spatial and genesis of evaporites. Data show that evaporite is not only the agent of the transportation for metals, but also the source providing some metals and most sulfur. Through study, the metallogenetic mechanism can be described as follows: along with other materials leached by the underground water from the sedimentary successions, they at the deep circulating evolved into hot brines containing complex compounds of some organics and sulfur and high degree of mineralization, and occurred in reservoir rocks. Then the hot brinesmigrated upward along faults into the host rock,where metal sulphides were depo-sited when hot brine was mixed with other fluids under the change of physicoche-mical conditions, it is the way that Jinding lead-zinc deposit was formed.