摘要
湘南地区地处钦杭成矿带和南岭成矿带的结合部位,成矿条件优越。湘南深地资源勘查开采项目实施的单孔3000 m科学深钻主要目标是验证和完善Cu-Sn复合成矿理论的研究成果,探索华南复杂地层的深部钻探工艺及方法,推动深部探测技术示范与找矿突破。因此,科学深钻的孔位优选是实现科学目标的关键。本文通过对坪宝地区成矿地质条件、典型矿床特征、控矿因素、地球物理探测信息等的综合分析认为:湘南坪宝地区发育多处与花岗岩成因关系密切的Cu-Sn多金属矿床,是开展深部探测的有利部位。根据坪宝地区物性特征、广域电磁测量和坑道重力测量解译结果,认为区域控岩控矿构造在深部至少有3~5 km的延伸,且广域电磁法异常对浅部矿化蚀变构造带具有良好的反映,矿化蚀变构造带向深部具有较好延深趋势。综合见矿可能性、矿床垂向分带规律、矿种组合及前期深部物探成果,结合浅部地质背景、已知矿化延伸及野外施工条件等因素,选择在宝山铜多金属矿区北西部的165剖面线上开展3000 m钻探验证。
The southern Hunan Province is located in the conjuction zone of the Qinhang metallogenic belt and Nanling metallogenic belt with superior metallogenic conditions.The main objective of the 3000 m scientific deep drilling of single hole in southern Hunan is to verify and improve the research results of Cu-Sn composite metallogenic theory,to explore the deep drilling technology and methods of complex strata in South China,and to promote the demonstration of deep exploration technology and prospecting breakthrough.Therefore,the hole location optimization of scientific deep drilling is the key to achieve scientific goals.Based on comprehensive analysis of metallogenic geological conditions,typical deposit characteristics,ore-controlling factors and geophysical prospecting information in the Pingbao area,it is concluded that there are many Cu-Sn polymetallic deposits in the Pingbao area of southern Hunan Province,which are closely related to the genesis of granites and are favorable locations for deep prospecting.According to the physical properties of the Pingbao area,the interpretation results of wide area electromagnetic survey and tunnel gravity survey,it is considered that the regional rock-controlling structure extends at least 3~5 km deep,and the wide area electromagnetic anomaly reflects the shallow mineralized altered structural belt well,and the mineralized altered structural belt has a good trend of deep extention.Taken into account the ore-finding possibility,the regularity of vertical zonation of the deposit,the mineral species combination and the previous deep geophysical exploration results,and the factors such as shallow geological background,known mineralization extension and field construction conditions,the drilling of 3000 m on 165 profile line in the north and west of Baoshan copper polymetallic mining area is selected for verification.
作者
文一卓
孟雨红
许以明
龚熙珺
李文朝
李立兴
刘建平
WEN Yizhuo;MENG Yuhong;XU Yiming;GONG Xijun;LI Wenchao;LI Lixing;LIU Jianping(Southern Hunan Institute of Geology and Survey,Chenzhou,Hunan 423000;Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037;School of Geosciences and Info-physics,Central South University,Changsha,Hunan 410083)
出处
《地质与勘探》
CAS
CSCD
北大核心
2022年第5期975-988,共14页
Geology and Exploration
基金
国家重点研发计划“钦杭成矿带湘南段铜锡多金属矿产深部探测技术示范”项目课题“深孔钻探验证与探测技术示范”(编号:2018YFC0603905)资助。
