古地理学报2025，Vol.27Issue(4)：823-839,17.DOI:10.7605/gdlxb.2025.016
冀中坳陷中部中元古界雾迷山组热液活动特征
Characteristics of hydrothermal activities in the Mesoproterozoic Wumishan Formation in central Jizhong Depression
摘要
Abstract
The Mesoproterozoic Wumishan Formation in the central Jizhong Depression hosts abundant hydrocarbon and geothermal resources.However,studies on the hydrothermal processes affecting Wumishan reservoirs remain limited.Based on field and core observations,this study integrates electron microprobe analysis,carbon and oxygen stable isotope analysis,strontium isotope ratios,and fluid inclusion thermometry to investigate the characteristics of hydrothermal activity and its impacts on reservoir evolution within the Wumishan Formation.Results reveal the presence of diverse hydrothermal minerals,and the hydrothermal processes can be classified into three categories:(1)magmatic-related activity,(2)carbonate-dominated hydrothermal activity,and(3)siliceous hydrothermal activity.These are evidenced by dolomite undergoing marbleization,hydrothermal dolostones showing more negative δ13C andδ18O values and higher 87Sr/86Sr ratios compared to matrix micritic dolomite,and anomalously elevated homogenization temperatures of fluid inclusions in dolomite,quartz,and fluorite cements.Variations in hydrothermal intensity are primarily controlled by regional magmatism and fluid migration pathways.Hydrothermal activity is strongest when faulting and magmatic events are temporally coupled,with greater intensity in the northwest compared to the southeast.More intense hydrothermal activity is also observed near higher-order,large-scale faults.Hydrothermal processes such as dissolution,recrystallization,and hydraulic fracturing enhance reservoir quality,while cementation,mineral filling,and silicification reduce porosity and act destructively.In contrast,marbleization has minimal influence on reservoir performance and largely preserves the original rock storage properties.关键词
流体包裹体/热液活动/雾迷山组/潜山构造带/冀中坳陷Key words
fluid inclusion/hydrothermal activity/Wumishan Formation/buried hill structural belt/Jizhong Depression分类
天文与地球科学引用本文复制引用
鲁锴,胡小龙,张辛雨,张涛,王哲麟,鲍志东,张军涛,鲍逸非,王启超,班舒悦,郭妍晶..冀中坳陷中部中元古界雾迷山组热液活动特征[J].古地理学报,2025,27(4):823-839,17.基金项目
深地国家科技重大专项(编号:2024ZD1003600)与中石化科技项目(编号:P24063)联合资助.[Co-funded by National Deep Under-ground Science and Technology Project and the Scientific(No.2024ZD1003600)and Technological Projects of Sinopec(No.P24063)] （编号:2024ZD1003600）
