CAJ | 학술논문

青藏高原东北部玉树地区第三纪发育一系列陆内红色盆地,它们是在古特提斯多岛洋构造格局基础上,受青藏高原的隆起和大规模的逆冲-推覆和走滑-拉分作用的影响而形成.其演化明显呈阶段性发展,即早期受南西向挤压作用,研究区形成逆冲断裂,致使断裂下盘压陷形成前陆盆地,沉积一套河流相的粗碎屑岩系,局部伴有岩浆活动;中期控盆地断裂发生西北向的走滑-拉分,形成拉分盆地,沉积一套湖泊三角洲相细碎屑岩系,并伴有广泛岩浆活动;晚期走滑挤压作用,沉积一套河流湖泊相粗碎屑岩系.区域构造演化控制了盆地沉降作用、沉积作用、火成活动和盆地的构造格架.
청장고원동북부옥수지구제삼기발육일계렬륙내홍색분지,타문시재고특제사다도양구조격국기출상,수청장고원적륭기화대규모적역충-추복화주활-랍분작용적영향이형성.기연화명현정계단성발전,즉조기수남서향제압작용,연구구형성역충단렬,치사단렬하반압함형성전륙분지,침적일투하류상적조쇄설암계,국부반유암장활동;중기공분지단렬발생서북향적주활-랍분,형성랍분분지,침적일투호박삼각주상세쇄설암계,병반유엄범암장활동;만기주활제압작용,침적일투하류호박상조쇄설암계.구역구조연화공제료분지침강작용、침적작용、화성활동화분지적구조격가.
With the Qinghai-Tibet Plateau uplifting and large-scale thrusting and striking, there have developed a lot of Tertiary intracontinental red basins formed on the base of the Palaeo-Tethys multi-island ocean framework around the Yushu area in the northeast of the Plateau. The basins underwent a phased evolution history. In the early stage the thrust faults developed and forced the lower plates to pouch and to form foreland basins with depositions of coarse fragmentals of river facies and local magmatisms in the researched area. And in the next stage the faults northwestly striked and the pull-apart basins developed over the foreland basins, with depositions of fine fragmentals of lacustrine facies and widespread magmatisms. In the terminal stage the faults thrusted to northeast again and to form foreland basins with depositions of coarse fragmentals of river facies and lacustrine facies. The tectonic evolutions controlled the sedimentation, pyrogenesis and structural framework of the basins.