塔北轮南古潜山北部轮南断裂带发育演化特征及其对区域构造背景的响应  

Development and evolution characteristics of the Lunnan fault zone in the northern part of the Lunnan buried hill of the North Tarim uplift and its response to the regional tectonic background

作　　者：罗慎超[1] 李洪[1] 彭鹏[1] 张博[1] 陈元勇[1] 秦雪[1] 晏楠[1] 张月[1] 曹明月 卓婉婷 李兴安 Luo Shenchao;Li Hong;Peng Peng;Zhang Bo;Chen Yuanyong;Qin Xue;Yan Nan;Zhang Yue;Cao Mingyue;Zhuo Wanting;Li Xing'an(Tarim Oilfield Company,PetroChina,Korla,Xinjiang 841000;School of Earth Science and Technology,China University of Petroleum(East China),Qingdao,Shandong 266580)

机构地区：[1]中国石油塔里木油田分公司,新疆库尔勒841000 [2]中国石油大学(华东)地球科学与技术学院,山东青岛266580

出　　处：《地质科学》2025年第2期345-359,共15页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：中国石油塔里木油田分公司与中国石油大学(华东)合作项目“轮南及周缘断裂构造建模与形成机理研究”(编号:基金项目:881023060103)资助。

摘　　要：为了明确塔北轮南古潜山北部轮南断裂带的发育特征及演化过程,对轮南断裂带几何学特征进行了系统精细解析,进一步结合区域构造背景的演化规律,探讨了轮南断裂带的形成与演化过程。结果表明:轮南断裂带由近东西走向的主干断裂和次级北东向断裂组成,断裂特征、性质在垂向和横向上具有明显的差异性,为一典型的多期活动、继承改造型断裂。轮南断裂带的形成演化受控于Rodinia超大陆裂解、特提斯洋开启与闭合、南天山洋开启与闭合以及印度板块碰撞的远程效应等区域构造事件。轮南断裂带主干断裂在新元古代开始活动,表现为控制伸展断陷的正断层,为Rodinia超大陆裂解事件在轮南地区的构造响应;寒武纪—石炭纪早期轮南断裂处于停滞阶段,主干断层的逆冲活动发生在石炭纪末期或二叠纪,为塔里木盆地北缘南天山洋闭合导致强烈构造挤压的响应;三叠纪早期南天山洋仍处于闭合造山阶段,轮南断裂主干断裂以继承性逆断发育为主,三叠纪中-晚期塔北地区进入南天山造山后作用阶段,在局部伸展作用下轮南断层的正断活动取代了逆断活动;侏罗纪—白垩纪塔北隆起仍处于南天山碰撞造山后应力松弛阶段,NWW-SEE向区域伸展,斜向伸展导致轮南断裂带发生张扭活动;古近纪早期轮南断裂带以次级断裂活动为主,受控于塔里木盆地相对于南天山向东偏南方向的逃逸,以及印度板块向欧亚板块碰撞远程效应派生的局部NW-SE向伸展应力场;古近纪中-晚期—新近纪印度板块和亚洲板块全面碰撞,持续挤压,古近纪早期活动的张扭性质断层停止活动。To clarify the development characteristics and evolution process of the Lunnan fault zone in the northern part of the Lunnan buried hill of the North Tarim uplift,the geometric characteristics of the Lunnan fault zone were systematically analyzed,and the formation and evolution process of the Lunnan fault zone were further discussed in combination with the evolution law of the regional tectonic background.The results show that the Lunnan fault zone is composed of the main near EW‑trending fault and the secondary NE‑trending fault.The fault characteristics and properties are obviously different in vertical and horizontal directions.It is a typical multi‑stage active and inherited fault.The formation and evolution of the Lunnan fault zone are controlled by regional tectonic events such as the Rodinia supercontinent breakup,the opening and closing of the Tethys,the opening and closing of the South Tianshan Ocean,and the remote effect of the Indian plate collision.The major fault of the Lunnan fault zone began to be active in the Neoproterozoic,manifesting as a normal fault controlling the extensional fault depression,and is the tectonic response of the Rodinia supercontinent breakup event in the Lunnan area.During the Cambrian to earliest Carboniferous,the Lunnan fault was in a stagnant stage,and the thrust activity of the major fault occurred in the Late Carboniferous or Permian,which was a response to the strong tectonic compression caused by the closure of the South Tianshan Ocean on the northern Tarim Basin.In the Early Triassic,the South Tianshan Ocean was still in the closed orogenic stage,and the major fault of the Lunnan fault were mainly inherited reverse faults.In the Middle‑Late Triassic,the northern area of Tarim Basin entered the post‑orogenic stage of the South Tianshan Mountains,and the normal fault activity of the Lunnan fault replaced the reverse fault activity under the local extension.The North Tarim uplift in the Jurassic‑Cretaceous is still in the stress of relaxation stage after the

关 键 词：断裂特征 演化过程 轮南断裂带 区域构造背景 塔北隆起 

分 类 号：P542[天文地球—构造地质学]