Geochemical characteristics and prospecting effects in the karst stone mountainous area in northern Guizhou
The karst mountainous area in northern Guizhou is characterized by its complex geological struc-tures and uneven karst development,which poses certain challenges for mineral exploration work in the re-gion.Through the conduct of a 1∶50,000 stream sediment geochemical survey,the geochemical characteris-tics of 11 elements related to the dominant mineral species within the area were analyzed,and element com-bination anomalies were delineated.Based on this,combined with the results of a 1∶10,000 soil geochemical survey for anomaly verification,comprehensive anomalies were identified.The results indicate that:there is a strong differentiation and high data density for Cd,Pb and Zn elements,suggesting significant mineraliza-tion potential,likely due to some geological action leading to local enrichment;the differentiation degree of Ag element content is moderate,indicating a certain potential for mineralization;the differentiation degree of Hg,Mo,As,Cr,V,Sb,and Bi elements is the weakest,and they are of the uneven type,with less poten-tial for mineralization.The spatial coincidence of the stream comprehensive anomalies with the soil compre-hensive anomalies is good,indicating the same mineralization stratigraphic position;the area belongs to a mesothermal to low-temperature hydrothermal lead-zinc deposit,controlled by both stratigraphic layers and structures,with the mineralization stratigraphic position being the lower member of the Lower Ordovician(Upper Ordovician)Loushan Guan Formation.