Mineralization Series and Prospecting Direction of Salt and Groundwater Mineral Deposits in Qaidam Basin,China
Since the Cenozoic,Qaidam Basin has developed a complex tectonic system and a series of relatively independent tectonic and metallogenic units.Within specific spatiotemporal ranges including the shallow salt lake area in Quaternary,the alluvial-proluvial fan area in Pleistocene,and the trap structural area of Paleogene-Neogene,the different tectonic units in Qaidam Basin have brought minerals with relatively unique occurrence statuses and mineral compositions because of variations in the sedimentary environment and metallogenic conditions.The inductive research on the spatiotemporal distribution characteristics,mineralization,and metallogenic geological background of basin salts and groundwater resources,along with the classification of metallogenic series for basin salt and groundwater mineral deposits,holds great significance in guiding future exploration,ore prospecting,and resource development and utilization,as well as ensuring the smooth construction of a world-class salt lake industrial base.Guided by the metallogenic series theory,the basin evolution,salt metallogenic units,spatiotemporal distribution of mineral resources,and metallogenic types are systematically collated based on the latest exploration and research findings on Qaidam Basin.As a result,the salt and groundwater mineral deposits in Qaidam Basin are classified into three metallogenic series,six metallogenic sub-series,and fifteen ore deposit types.Moreover,utilizing the natural classification of deposits and the predictive mindset of inevitable mineralization in certain spatiotemporal dimensions and prospecting/research of unexplored or unpredicted deposits,the effective prospecting directions for salt and groundwater mineral deposits in Qaidam Basin are presented.