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塔里木盆地东北缘新元古界-新生界中分布多期不整合界面。它们是不同地球动力学背景的产物,也是研究塔里木盆地东北缘乃至整个盆地构造演化的重要依据。通过野外地质调查和盆地内地震资料的综合研究,进一步阐述Nh2/Nh1、∈/Z、O3/O2、S/O3、C/AnC、T/AnT、J/AnJ、E/AnE和N2/N1重要的不整合面特征及其形成的地球动力学背景,建立了研究区完整的盖层不整合演化序列。根据不整合面特征,结合地层、沉积和构造特征将塔里木盆地东北缘盖层构造演化划分为3个旋回、6个阶段:(1)南华纪泥盆纪克拉通内裂解和闭合旋回,(2)石炭纪三叠纪克拉通边缘裂解-闭合旋回,(3)侏罗纪第四纪拉张-挤压旋回;①南华纪奥陶纪克拉通内坳拉槽阶段,②志留纪泥盆纪挤压隆升阶段,③石炭纪早二叠世克拉通内坳陷盆地阶段,④早二叠世末期冲断走滑三叠纪前陆盆地阶段,⑤侏罗纪古近纪断陷-坳陷盆地阶段,⑥新近纪第四纪再生前陆盆地阶段。
The Neoproterozoic-Cenozoic distribution multistage unconformity interface in northeastern Tarim Basin. They are the products of different geodynamic backgrounds and also an important basis for studying the tectonic evolution in the northeastern margin of the Tarim Basin and the entire basin. Nh2 / Nh1, ∈ / Z, O3 / O2, S / O3, C / AnC, T / AnT, J / AnJ, E / AnE and N2 / N1 are further elaborated through the field geological survey and the seismic data in the basin Important unconformity features and the formed geodynamic background, a complete sequence of unconformity evolution in the study area has been established. According to the characteristics of unconformity, the tectonic evolution of the northeastern margin of Tarim Basin is divided into three cycles and six stages according to the characteristics of unconformity, sedimentation and tectonism: (1) the South China Sea Devonian cratonic inner crack and closed cycle, (2 ) Carboniferous Triassic cratons edge-cleavage-closure cycles, (3) Jurassic Quaternary extension-compression cycles, ① South China Ordovician craton pass in the aulankan stage, ② Silurian Devonian (3) the Early Permian cratonic basin stage in the Carboniferous, (4) the late Permian Triassic foreland basin stage, (5) the Jurassic Paleogene rift - Depression basin stage, ⑥ Neogene Quaternary regeneration foreland basin stage.