摘要
北山地区发育中生代逆冲推覆构造及相关的成矿作用,但相应的研究工作一直薄弱,限制了找矿勘探进展。内蒙古额济纳旗沙坡泉地区的大比例尺地质填图及钻探工作发现,该区存在一条北西向逆冲推覆构造带。地层层序关系表明,逆冲推覆作用发生在早侏罗世-早白垩世之间,逆冲推覆构造及其派生构造控制了多金属矿体的形成和分布,其中北东向网状断裂裂隙系统是最主要的导矿、容矿构造。该推覆构造的发现指示了沙坡泉地区还有较大的找矿潜力,同时也启示在研究中应注意北山中南带中生代的逆冲推覆构造及相关的成矿作用。
The Mesozoic overthrust nappe structures were found by more and more geologists,and the correlated mineralization in Beishan area has become a key problem;nevertheless,the related study and knowledge are very insufficient.This situation has hindered the progress in mineral survey and exploration.Lower Cretaceous strata,overthrust faults,klippen and tectonic windows can be recognized.The sequences of stratigraphic units suggest that the overthrust nappe structures were formed between the Early Jurassic and the Early Cretaceous,the overthrust nappe tectonics and the lower order structures derived from this overthrust nappe tectonics controlled the formation and distribution of orebodies,in which the NE-trending network faults-fractures system was the main ore fluid channels and hosted orebodies.Based on a study of the overthrust nappe tectonics,the authors hold that there is a great potential for prospecting in the Shapoquan ore district,and that more attention should be paid to the overthrust nappe tectonics and correlated mineralization in middle and south metallogenic belt in Beishan area.
作者
张善明
贺中银
胡二红
王亚楠
王博
陈强
ZHANG Shanming;HE Zhongyin;HU Erhong;WANG Ya-nan;WANG Bo;CHEN Qiang(School of Earth Science and Resources,China University of Geosciences,Beijing 100083,China;The Eighth Branch of Inner Mongolia Bureau of Geology and Mineral Resources Exploration and Development,Wuhai 016000,Inner Mongolia,China;Faculty of Earth Resources,China University of Geosciences,Wuhan 430077,Hubei,China)
出处
《地质通报》
CAS
CSCD
北大核心
2018年第2期435-445,共11页
Geological Bulletin of China
基金
内蒙古自治区国土资源厅项目<内蒙古自治区额济纳旗呼噜古其特等四幅1:5万区域矿产地质调查>(编号:NMKD2014-10)
关键词
逆冲推覆构造
飞来峰
中生代
构造控矿
沙坡泉
overthrust nappe tectonics
klippe
Mesozoic
structural ore-control
Shapoquan
作者简介
张善明(1983-),男,在读博士生,高级工程师,从事区域矿产地质调查工作。E-mail:Shanming.Zhang@163.com
