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《Earth Science》 2017-12
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Basement Structural Features of Mesozoic Volcanic Basins in Erguna Massif:Implications from Lingquan Basin

Zhang Li;Liu Yongjiang;Feng Zhiqiang;Li Weimin;Wen Quanbo;Liang Chenyue;Huan Hengfei;Meng Jingyao;Zhou Jianping;Yang Zhengyong;College of Earth Sciences,Jilin University;Shenyang Institute of Geology and Mineral Resources,CGS;Department of Earth Science and Engineering,Taiyuan University of Technology;Boome Pickens School of Geology,Oklahoma State University;Geological Party No.243,China National Nuclear Corporation;  
Characteristics of Bouguer gravity anomaly in the Lingquan basin indicate that lower gravity region on both sides of the basin is mainly the Jurassic-Cretaceous fault zone,the center is mainly a basement uplift.The upward continuation of the gravity anomaly is carried out,the results show that the upper surface of deep geological bodies has the characteristics of"east,west deep and center shallow";the residual gravity anomaly also indicates that the local gravity of the central region mainly reflects the basement uplift,and the lower gravity of the eastern and western regions mainly reflects the fault of the Jurassic-Cretaceous.The basement faults of the Lingquan basin mainly are north and north-east,secondly is northwest,there are also early near north-south and east-west faults.The tectonic unit of the Lingquan basin is divided into the western fault zone,the central uplift zone and the eastern fault zone,we find that the Lingquan basin is actually an uplift rather than a graben basin,this is the result of tectonic inversion in the basin,other Mesozoic volcanic basins in the Erguna massif also have this model,and its basement is characterized by"shallow south deep north".
【Fund】: 国家重点研发计划项目(No.2017YFC0601401);; 内蒙古灵泉地区断裂、火山构造特征及其与铀多金属矿化关系研究项目(No.201255);; 大兴安岭成矿带漠河-扎兰屯地区地质矿产调查项目(No.DD20160047);; 额尔古纳-满洲里地区中生代内生铀及多金属区域成矿地质环境研究项目(No.200805)
【CateGory Index】: P588.14
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