摘要
山东省铅锌矿床以中小型规模的热液脉型成因为主,在胶莱盆地西南缘新发现多处铅锌多金属矿床/点,对其开展地质—地球物理综合研究。研究区位于沂沭断裂带与五莲断裂交会的“两带三块”地带,发育四宝山火山机构,田家峪铅锌矿床是其中新发现的典型矿床。Ⅳ-1主矿体赋存于NW向张扭性断裂,北西段少量工程揭露矿体真厚度1.55~1.67 m,Pb品位0.57%~6.56%,稀散元素Ga达到伴生矿产指标,向深部、东南方向稳定延伸,矿化有明显增强趋势。矿石与围岩电性差异明显,矿带呈高阻高极化异常特征,激电测量圈定3处激电异常,规模最大的DJH1异常由Ⅳ号矿带引起。研究区与毗邻的七宝山多金属矿田有相似的成矿地质条件,并均位于重力异常梯度带和弱负磁异常背景中局部正磁异常内,已知凤台沟铜金矿和穆家沟、后黄山铅锌重晶石矿等矿床/点构成陆相火山热液成矿系列。研究区在成矿系列缺位补齐、主矿体系统勘查评价、共伴生矿产综合评价和激电异常查证解译等方面有较好的找矿远景。
Lead zinc deposits in Shandong province are mainly small and medium sized hydrothermal vein type.Several lead zinc polymetallic deposits/occurrences have been newly discovered in southwestern Jiaolai basin.Comprehensive geological-geophysical studies have been carried out in this area.The study area is located in the"two belts and three blocks"zone where Yishu fault zone intersects Wulian fault zone.Sibaoshan volcanic structures have been developed.Tianjiayu lead-zinc deposit is a typical newly discovered deposit.TheⅣ-1 main ore body occur along the northwest torsional fault with a true thickness in the northwestern section of 1.55~1.67m.The grade of lead is 0.57%~6.56%.The scattered element Ga has reached the criteria for associⅣated mineralization,extending stably toward the deeper and southeastern directions,with a significant trend of intensifying mineralization.Electrical difference between the ores and the surrounding rocks is obvious,and the ore belt exhibits high-resistance and high-polarization anomalies.Three abnormal induced polarization have been circled by using Induced polarization measurements.The largest one is DJH1,which is caused by No.Ⅳore belt.The study area shares similar metallogenic geological conditions with the adjacent Qibaoshan polymetallic deposit,and both are located within localized positive magnetic anomalies in the background of gravity anomaly gradient zones and weak negative magnetic anomalies.Fengtai coppergold deposit and Mujiagou and Houhuangshan Leadzinc barite deposits form a continental volcanic hydrothermal metallogenic series.The research area has good prospecting prospects in filling the gaps in the mineralization series,exploring and evaluating main ore body system,comprehensive evaluation of associated minerals,and verification and interpretation of induced polarization anomalies.
作者
王欣然
申颖
邹占春
张超
申恩育
管翔
周立国
董学
WANG Xinran;SHEN Ying;ZOU Zhanchun;ZHANG Chao;SHEN Enyu;GUAN Xiang;ZHOU Liguo;DONG Xue(Shandong Physical and Chemical Exploration Institute,Shandong Engineering Research Center of Underground Resources and Environment High Precision Detection,Shandong Provincial Engineering Research Center for Geological Prospecting,Shandong Ji'nan 250013,China;Shandong Forestry Protection and Development Service Center,Shandong Ji'nan 250014,China;No.8 Exploration Institute of Geology and Mineral Resources,Shandong Rizhao 276826,China;Lubei Geo-engineering Exploration Institute,Shandong Dezhou 253000,China;Shandong Institute of Geological Surveying,Shandong Ji'nan 250014,China)
出处
《山东国土资源》
2025年第12期38-47,共10页
Shandong Land and Resources
基金
山东省地质勘查项目(鲁勘字[2015]30号)
山东省地质矿产勘查开发局地质勘查引领示范项目(KC202213)。
关键词
铅锌多金属矿
地质—地球物理特征
陆相火山热液成矿系列
胶莱盆地西南缘
Lead-zinc polymetallic deposit
geological-geophysical characteristics
continental volcanic hydrothermal mineralization series
southwestern Jiaolai basin
