Spatial and Temporal Distribution of Ore-Forming Elements Au,Cu,Pb,Zn and Ag and Their Related Exploration Prediction in the Jinping Area,Yunnan Province
The Jinping area in Yunnan Province is a very important Au and Cu polymetallic ore concentration area in the southern section of the Ailaoshan Mountains.There is no consensus on the spatiotemporal enrichment and distribution patterns,constraint mechanisms of Au,Cu and other ore-forming elements in this area,and the basis for Au and Cu being the main ore-forming elements is also lacking in this area.Therefore,the prospecting direction and target areas in this area need to be further clarified.This work conducted a 1:50000 survey of water system sediments in Jinping County,and statistically analyzed the average element content(X)and relative enrichment coefficient(K)of the entire area and major geological units.Based on the geochemical parameter characteristics,element association relationships,element anomalies,and mineralization correlations of the Jinping area,it is determined that Au,Cu,Pb,Zn,and Ag are the main ore-forming elements in the Jinping area.By analyzing the spatiotemporal distribution and enrichment patterns of element geochemistry,it is known that the enrichment and distribution of element geochemistry in the Jinping area are limited by time and space.The peak periods of the enrichment of the main ore-forming elements Au,Cu,Pb,Zn,and Ag in this area are two stages(300～400 Ma and 470～485 Ma),and the Ordovician,Silurian,Devonian,Carboniferous,and Permian systems are determined to be the most promising era and strata for ore exploration in this area.The relationship between element anomalies and structures,magma,and mineralization suggests that the Sanjiahe fault,Maguohe fault,and Tianzhushan Fault in the area have a significant impact and control on element enrichment.The element anomalies in the Jinping area are closely related to mineralization.Based on the ore-forming laws and ore-controlling factors in the Jinping area,12 comprehensive anomalies and two prospecting prediction areas have been delineated.Prospecting potential analysis has been conducted on the two prospecting prediction areas,indicating the direction of prospecting and proposing further work suggestions.
stream sediment surveygeochemical characteristicsore-forming elementsprospecting potentialJinping areaYunnan Province
万方数据
维普
