地质与勘探2013，Vol.49Issue(4)：654-664,11.
内蒙古陈台屯斑岩型铜矿地质、地球物理特征及找矿方向
Geological and Geophysical Characteristics of the Chentaitun Porphyry Copper Deposit in Inner Mongolia and Prospecting Direction
摘要
Abstract
The Chentaitun copper district in Inner Mongolia,dominated by porphyry copper deposits,located in the middle section of the Hinggan Mountain,formed in middle Jurassic time.Two mineralization types have been identified:porphyry copper mineralization and vein-style copper mineralization.Porphyry copper mineralization occurred around the contact zones between the Permian Dashizhai Formation volcanoes and Chentai porphyry intrusion,with intense wall-rock alteration.The alteration associated with porphyry copper mineralization can be divided into four zones from lower to upper or from inside to outside,which are potassic,quartz-sericite-pyrite (QSP),argillic and propylitic zones.Porphyry copper mineralization was predominantly concentrated in the QSP zone.Vein-type copper ores were filled within the fractures of the Wanbao Formation sedimentary strata and Dashizhai Formation volcanic rocks.Central gradient-array induced polarization and CSAMT survey results were verified by diamond drilling.It is concluded that high chargeability anomalies are spatially coincident with both porphyry and vein-type copper orebodies.Therefore,the chargeability high could be key targets for the next stage of exploration.Low resistivity anomalies are not only caused by porphyry copper mineralization,but also generated by the Wanbao Formation sedimentary rocks of high porosity.It is necessary to investigate the reasons before applying the resistivity low to exploration targets.However,the high resistivity anomalies are usually associated with compact and barren geologic bodies.关键词
斑岩型铜矿/围岩蚀变/地球物理特征/找矿方向/陈台屯/内蒙古Key words
porphyry copper deposit/ alteration/ geophysical characteristics/ prospecting direction/ Chentaitun/ Inner Mongolia分类
天文与地球科学引用本文复制引用
刘鹤,姚敬金,陈国华,李怀祥,高红刚..内蒙古陈台屯斑岩型铜矿地质、地球物理特征及找矿方向[J].地质与勘探,2013,49(4):654-664,11.基金项目
国家科技支撑计划课题(2011BAB04B09)、教育部新世纪优秀人才支持计划(NCET-09-0710)、北京市优秀博士学位论文指导老师科研项目(20111141501)、高等学校学科创新引智计划(B07011)、教育部长江学者和创新团队发展计划项目(IRT0755)联合资助. （2011BAB04B09）
