大别-苏鲁造山带的东延及板块缝合线:郯庐-鸭绿江-延吉断裂的厘定  

Eastward Extension of Dabie-Sulu Orogenic Belt and the Suture Zone of the Plates: Determination of Tanlu-Yalujiang-Yanji Faults

作　　者：周建波[1] 刘建辉[1] 郑常青[1] 刘鹏举[1] 孙加鹏[1] 

机构地区：[1]吉林大学地球科学学院,长春130061

出　　处：《高校地质学报》2005年第1期92-104,共13页Geological Journal of China Universities

基　　金：国家自然科学基金 (4 0 2 72 10 0 ) ;国家油气专项 (XQ -2 0 0 4-0 7)"大庆探区外围中新生代断陷盆地群演化与油气远景"项目资助

摘　　要：根据大别-苏鲁造山带北缘和吉林—黑龙江东部的三叠纪浅变质加积杂岩特征标志,认为大别地区的板块缝合线为信阳-舒城断裂,苏鲁地区的为郯庐-鸭绿江断裂,且苏鲁造山带向北延入东北的吉林—黑龙江东部地区,而华北与扬子板块之间构造缝合线的东延部分则为郯庐-鸭绿江-图们江-延吉断裂。在此基础上,提出了亚洲东部三叠纪以来连续的俯冲-加积模型:(1)三叠纪扬子板块在华北板块向南突出部位(大别—苏鲁一带)发生点碰撞形成超高压变质岩,之后扬子板块由点碰撞逐渐向两侧旋转拼贴形成加积杂岩;(2 )侏罗纪—新生代在三叠纪碰撞基础上,太平洋板块向欧亚大陆连续俯冲和加积。According to the exposure markers of the low-grade metamorphic accretionary complex in the north margin of the Dabie-Sulu orogenic belt and the Triassic low-grade metamorphic accretionary complex in the eastern Jilin and Heilongjiang Provinces, we believe that the suture zone of the plate subduction in Dabie region is the Xinyang-Shucheng fault, and that in Sulu region is the Tanlu-Yalujiang fault. Meanwhile, the Sulu orogenic belt extends into eastern Jilin and Heilongjiang Provinces, and the eastward extension part of the tectonic suture zone between the North China plate and South China plate is the Tanlu-Yalujiang-Tumenjiang-Yanji faults. Based on the above discussion, we put forward a continuous subduction-accretionary model in east Asia since the Triassic: (1) A spot collision between South and North China plates took place at the southward extension part of North China plate in the Triassic, then the South China plate was transformed from spot collision into revolving amalgamation toward both sides which resulted in forming accretionary complex. (2) Following the Triassic collision, with Pacific plate subduction and continuous accumulation towards Eurasian plate in the Jurassic-Cenozoic, the huge accretionary complex belt was eventually formed.

关 键 词：大别-苏鲁造山带 东部延伸 板块缝合带 郯庐-鸭绿江-延吉断裂 亚洲东部动力学 

分 类 号：P542.3[天文地球—构造地质学]