福建政和矿集区矿化−蚀变及元素迁移特征——以岩皮头多金属勘查区为例OA

[Objective]The Zhenghe area in Fujian Province,southeastern China,is a gold-polymetallic ore concentration region,where magmatic-hydrothermal deposits are well developed and exhibit complex and diverse patterns of mineralization and alteration.However,due to complex geological conditions and limited research,the characteristics of mineralization and alteration remain unclear.[Methods]This study focused on the Yanpitou polymetallic exploration area on the northwestern margin of the Dongkeng volcanic basin.Detailed field geological surveys,drillhole mineralization-alteration zoning,and quantitative alteration analyses were conducted to provide valuable information on wall-rock alteration and geochemistry for further deep exploration.[Results]The results indicated that the Yanpitou area was characterized by both Pb-Zn and Cu-Mo mineralization.With mineralization as the center,alteration exhibits a clear zoning pattern,which could be divided into the following zones:Potassic alteration zone,skarn zone,metal mineralization zone,mica schist zone,and hornfels zone.From the potassic to skarnized zone,elements such as Si,Al,TFe(total iron),Ca,and K were depleted.In contrast,from the skarnized and hornfels zones to the mineralized zone,most elements migrated toward the mineralized zone,indicating that the ore-forming fluids were active during mineralization.The results suggested that potassic and skarn alterations were closely associated with mineralization in the Yanpitou polymetallic exploration area,and the mica schist zone was also linked to mineralization.[Conclusion]Based on previous research,a mineralization-alteration zoning model for the Yanpitou polymetallic exploration area was established.The results indicate significant potential for deep exploration.Future exploration should focus on the northwestern direction toward the Huangshegang area in the Yanpitou region,where extensive skarn deposits occur within the Tieshan complex.