淮北煤田构造特征和形成机制-煤田地质与勘探.PDFVIP

第45 卷 第3 期 煤田地质与勘探 Vol. 45 No.3 2017 年6 月 COAL GEOLOGY EXPLORATION Jun. 2017 文章编号: 1001-1986(2017)03-0001-06 淮北煤田构造特征和形成机制 方 婷，解国爱，王 博，张庆龙，解思伊，邹 旭 (南京大学地球科学与工程学院，江苏 南京 210046) : ① 2 SNNNE NNW NNE ② ③– 3 SN EW NWWSEE NNESSW NNESSW ： ：P54 ：A DOI: 10.3969/j.issn.1001-1986.2017.03.001 The structure features and forming mechanism of Huaibei coalfield FANG Ting, XIE Guoai, WANG Bo, ZHANG Qinglong, XIE Siyi, ZOU Xu (School of Earth Sciences and Engineering Nanjing University, Nanjing 210046, China) Abstract: Huaibei coalfield lies on the leading edge and outskirts of the Xusu arc thrust belt. The paper discussed the structural features, tectonic evolution and forming mechanism of the Huaibei coalfield based on the field geological sur- vey and a synthesis of available data. The results show that: ① Huaibei coalfield could be subdivided into the northern and the southern units along Subei fault. The northern unit is featured by thrust faults and Jurassic-type folds distributed as an arc belt protruding westward, of which tectonic lines are characterized by SN-NEE strikes. The southern unit has got tectonic lines that strike NNW and NNE, and dominated by normal faults and open short-axis folds. ② The secon- dary subdivision of the southern and northern structural units is in line with the faults developed along the leading edge of the nappe, and structural analyses have been conducted within these units. The northern unit is a part of the mainbody of