新疆西南天山哈拉奇地区古生代地层剖面中三个不整合面的确定及其意义  

The Identification and Its Significance of the Three Unconformity Surfaces of the Paleozoic Stratigraphic Profile in Halaqi Area in Southwestern Tianshan,Xinjiang

作　　者：刘晓煌[1] 牛树银[2] 张雄华[3] 李保飞 张新勇[1] 宋贺民 鲁世鹏 刘玖芬[1] 

机构地区：[1]中国人民武装警察部队黄金第七支队,山东烟台264000 [2]石家庄经济学院,河北石家庄050031 [3]中国地质大学(武汉),湖北武汉430074

出　　处：《西北地质》2013年第4期115-130,共16页Northwestern Geology

基　　金：中国地质调查局地质调查项目"新疆哈拉奇地区区域地质矿产调查"(1212011120495);"新疆1:5万卡克;色帕巴衣幅区域地质矿产调查"(1212011220661)

摘　　要：哈拉奇地区位于西南天山南侧、塔里木盆地西北缘,是塔里木板块和哈萨克斯坦-西伯利亚板块碰撞的前锋区域。出露了寒武纪—二叠纪变质程度较浅的地层;新发现其存在奥陶系—志留系平行不整合、泥盆系—石炭系平行不整合和二叠系—中、新生界角度不整合共3个不整合面,并以阿尔帕确依切克穹窿式复背斜为界,两侧志留系—二叠系沉积环境存在较大差异,组成背斜的奥陶系、寒武系与上覆地层变质作用也不同。奥陶系—志留系平行不整合与区域上祁连运动相对应;泥盆系—石炭系平行不整合同天山运动中期相吻合;二叠系—中、新生界角度不整合为天山运动末期的影响造成。Halaqi region is located in Southwest Tianshan-Northwest Tarim Basin. It＇s the front region of collision between Tarim Block and Kazakhstan-Siberia Block. Cambrian-Permian strata with slight metamorphism outcropped in this area, where we discover three unconformity surfaces, namely angular unconformity in Permian-Cenozoic, parallel unconformity in Ordovician-Silurian and parallel unconformity in Devonian-Carboniferous. The unconformity is bordered by Aferpaqueyiqieke vault anticlinorium. The sedimentary environment on both sides of Silurian-Permian is greatly different. The metamorphism in Ordovieian and Cambrian composed of anticline is different from that of overlying strata. According to regional geology and evolution,the parallel unconformity in Ordovician-Silurian was corresponding to the regional Qilian Movement. The parallel unconformity in Devonian-Carboniferous was corresponding to the middle Tianshan Movement. The angular unconformity in Permian-Cenozoic was influenced by the end of Tianshan Movement.

关 键 词：哈拉奇 不整合面 阿尔帕确依切克穹窿式复背斜 地质演化 

分 类 号：P534.4[天文地球—古生物学与地层学]