地质与勘探2025，Vol.61Issue(4)：715-729,15.DOI:10.12134/j.dzykt.2025.04.004
胶东香夼铅锌铜(钼)多金属矿成矿流体特征与成矿潜力
Characteristics of Ore-Forming Fluids and Mineralization Potential of the Xiangkuang Pb-Zn-Cu(Mo)Polymetallic Deposit in Jiaodong Peninsula
摘要
Abstract
In recent years,significant progress has been made in the deep exploration of the Xiangkuang Pb-Zn-Cu(Mo)polymetallic deposit,making the genesis and prospecting direction of skarn-porphyry Pb-Zn-Cu(Mo)polymetallic deposits in the Jiaodong region a hot topic in scientific research and geological exploration.Based on the analysis of ore deposit,sulfur-lead isotopes,and fluid inclusions,this study analyzed the relationship between geological-geochemical characteristics and mineralization,revealed the source of ore-forming materials and the evolution characteristics of ore-forming fluids in the Xiangkuang deposit,and proposesd the direction of deep copper-molybdenum prospecting and resource potential.The results show that the orebody I is parallel in space to the newly discovered porphyry-type orebody M beneath it.The rock lead isotopic ratios of the copper orebodies I and M are as follows:206Pb/204Pb ranges from 17.260 to 17.734,207Pb/204Pb ranges from 15.501 to 15.554,and 208Pb/204Pb ranges from 37.988 to 38.289.The δ34S of pyrite within copper orebodies I and M ranges from 1.6‰ to 2.9‰.The fluid inclusions in quartz from orebodies I and M are predominantly gas-liquid two-phase aqueous solution inclusions.In the upper orebody I,the homogenization temperature range of fluid inclusions in pyrite-bearing quartz veins varies between 193.8℃ and 371.5℃,with salinity(expressed as wt%NaCleqv)ranging from 6.74%to 16.80%.In the lower orebody M,the homogenization temperature of fluid inclusions in pyrite-bearing,chalcopyrite-bearing quartz veins,quartz veins,and single quartz grains is 138.8℃～348.7℃,with salinity ranging from 1.74%to 18.22%.Both salinity and temperature increase progressively with depth.The study suggests that the source of ore-forming materials exhibits crust-mantle mixed characteristics,and copper-molybdenum and other polymetallic metals generally originate from magmatic evolution,with a trend towards porphyry-type mineralization in the deep part.The average salinity of fluid inclusions indicates that the fluid evolution is between the porphyry stage and the skarn stage,and the highest fluid inclusion temperature is lower than the main mineralization temperature of porphyry molybdenum deposits,indicating that there is still significant resource potential in the deep part.关键词
矽卡岩-斑岩型/铅锌铜(钼)多金属/成矿潜力/硫铅同位素/流体包裹体/香夼/胶东Key words
skarn-porphyry type/Pb-Zn-Cu(Mo)polymetal/mineralization potential/sulfur and lead isotopes/fluid inclusion/Xiangkuang/Jiaodong分类
天文与地球科学引用本文复制引用
刘伟栋,张其凯,卢文姬,王俊君,张保涛,蓝信杰,胡兆国,燕军利,李秀章,韩成,黄震,王禹杰..胶东香夼铅锌铜(钼)多金属矿成矿流体特征与成矿潜力[J].地质与勘探,2025,61(4):715-729,15.基金项目
山东省资源资源厅地质勘查项目(编号:鲁勘字[2021]40号、鲁勘字[2023]21号)与中国冶金地质总局山东局科研项目(编号:KY202103、SDYJ-QNKJ202404)联合资助. （编号:鲁勘字[2021]40号、鲁勘字[2023]21号）
