CAJ | 학술논문

辽河断陷的中元古代构造演化与华北北缘和郯庐断裂带的构造演化密切相关。大红峪期，华北北缘在大陆裂谷的基础上进一步发展成被动大陆边缘，郯庐断裂带随之响应发生张裂接受沉积。之后海平面升降，辽宁境内表现为杨庄上升和凌源上升，其不整合面均为沉积属性，在这期间，郯庐断裂带与华北北缘一致保持着裂解趋势。由兴城上升至芹峪上升，辽河断陷沉积了大红峪组、高于庄组、杨庄组和雾迷山组，洪水庄组和铁岭组尚待确定。芹峪上升表示华北北缘开始由被动大陆边缘转换成主动大陆边缘，洋壳低角度俯冲使华北北缘挤压抬升并迫使华北克拉通向南挤压，NE向郯庐断裂由张裂转换成挤压滑动，辽河断陷抬升遭受剥蚀。辽河断陷内的杨庄组和雾迷山组可能就在这一时期剥蚀殆尽。随后洋壳高角度俯冲，华北北缘形成弧后盆地，辽河断陷与燕山地区一样沉积下马岭组。蔚县上升为华北北缘陆陆碰撞造成，陆陆碰撞使华北北缘再次抬升，郯庐断裂挤压走滑增强，辽河断陷褶皱抬升，下马岭组遭受剥蚀。直到罗迪尼亚大陆开始裂解，郯庐断裂带再次张裂，辽河断陷沉积长龙山组和景儿峪组。
료하단함적중원고대구조연화여화북북연화담려단렬대적구조연화밀절상관。대홍욕기，화북북연재대륙렬곡적기출상진일보발전성피동대륙변연，담려단렬대수지향응발생장렬접수침적。지후해평면승강，료녕경내표현위양장상승화릉원상승，기불정합면균위침적속성，재저기간，담려단렬대여화북북연일치보지착렬해추세。유흥성상승지근욕상승，료하단함침적료대홍욕조、고우장조、양장조화무미산조，홍수장조화철령조상대학정。근욕상승표시화북북연개시유피동대륙변연전환성주동대륙변연，양각저각도부충사화북북연제압태승병박사화북극랍통향남제압，NE향담려단렬유장렬전환성제압활동，료하단함태승조수박식。료하단함내적양장조화무미산조가능취재저일시기박식태진。수후양각고각도부충，화북북연형성호후분지，료하단함여연산지구일양침적하마령조。위현상승위화북북연륙륙팽당조성，륙륙팽당사화북북연재차태승，담려단렬제압주활증강，료하단함습추태승，하마령조조수박식。직도라적니아대륙개시렬해，담려단렬대재차장렬，료하단함침적장룡산조화경인욕조。
Tectonic evolution of Liaohe fault depression is closely related to tectonic evolution of northern margin of North China and Tanlu fault belt in Mesoproterozoic period. In Dahongyu period, the northern margin of North Chi?na have a development of a passive continental margin on the basis of the continental rift. Along with the evolution of northern margin of the North China, tensional fracture and sedimentary happened in Tanlu fault belt. Then sea level rise and fall, and the surface in Yangzhuang and Lingyuan rise in Liaoning province. Its unconformity has the deposition attributes. In this period, Tanlu fault belt and the northern margin of the North China still keep splitting tendency. From Xingcheng rise to Qinyu rise, Liaohe rift deposited Dahongyu formation, Gaoyuzhuang formation, Yangzhuang formation and Wumishan formation;while Hongshuizhuang formation and Tieling formation still need to be determined. Qinyu rise shows that the northern margin of North China began from the passive continental margin converted to active continental margin. The low angle subduction of oceanic crust maked the northern margin of North China extrusion and uplift, and forced the North China craton move to the south, north and east Tanlu fault belt by splitting into extrusion and sliding. Liaohe rift was lift and suffered from erosion. Yangzhuang formation and Wumishan formation may be eroded during this period in the Liaohe rift. Along with the high angle subduction of the oceanic crust, the northern margin of North China forming back arc basin, Liaohe rift deposited Xiamaling forma?tion as Yanshan area. Weixian rise was caused by continental collision, and maked the northern margin of North China rise again. The extrusion and strike slip of Tanlu fault zone become stronger, Liaohe rift folded and uplif?ted, and Xiamaling formation suffered from erosion. Utill Rodinia began to crack, Tanlu fault belt cracked again, Liaohe rift deposited Changlongshang formation and Jingeryu formation.