中国东部北黄海盆地东部坳陷岩浆活动特征及其与区域构造的耦合关系  

Magmatic Activity Characteristics and Its Coupling Relationship with Regional Tectonics in the Eastern Depression of North Yellow Sea Basin,Eastern China

作　　者：王任[1] 石万忠[1,2] 张先平[1,2] 唐大卿[1,2] 陈昊然 徐清海[1] 徐壮[1] Wang Ren Shi Wanzhong Zhang Xianping Tang Daqing Chen Haoran Xu Qinghai Xu Zhuang(Faculty of Earth Resources, China University of Geoscieuces, Wuhan 430074, China Key Laboratory of Tectonics and Petroleum Resources of the Ministry of Education, China University of Geosciences, Wuhan 430074, China Fuling Shale Gas Exploration and Development Cooperation, SINOPEC, Chongqing 408000, China)

机构地区：[1]中国地质大学资源学院,湖北武汉430074 [2]中国地质大学构造与油气资源教育部重点实验室,湖北武汉430074 [3]中石化重庆涪陵页岩气勘探开发有限公司,重庆408000

出　　处：《地球科学（中国地质大学学报）》2017年第4期587-600,共14页Earth Science-Journal of China University of Geosciences

基　　金：国家十三五油气重大子课题(No.2016ZX05025002-003);国家基础地质调查项目(No.12120114055801);111引智项目(No.B14031)

摘　　要：如何深入了解中国东部北黄海盆地东部坳陷岩浆活动特征是目前研究的前沿之一.为探讨早白垩世异常剧烈岩浆活动的区域构造成因并揭示中国东部的构造动力学机制,利用井-震及岩浆岩测试资料,对北黄海盆地岩浆活动特征及其与区域构造的耦合关系进行研究.在空间上刻画了岩浆的侵入相、喷出相的地震反射特征及沿深大断裂展布的平面分布特征;在时间上划分出了包括早白垩世108~115Ma、134~145Ma在内的4期岩浆活动.结合区域地质分析认为早白垩世早期,伊泽奈琦板块沿北北西斜向俯冲于欧亚板块之下,太平洋板块向南西方向俯冲,板块剪切作用导致郯庐断裂带左旋走滑,使得盆地处于左旋伸展环境中,内部形成派生的北西向右旋、近南北向左旋的次级共轭断裂系并控制岩浆上侵底辟活动.经过综合分析,厘清了盆地岩浆活动及断裂演化过程与区域板块运动之间的耦合关系.In order to deepen the understanding of magmatic activity characteristics in North Yellow Sea basin,discuss the tectonic origin of such intensified magmatic activity in Early Cretaceous,and reveal the structural dynamic mechanism in eastern China,the magmatic activity characteristics and its coupling relationship with regional tectonics were well depicted in North Yellow Sea basin based on well data,high-precision 3Dseismic data and magmatic rocks test data.On the space scale,intrusive and extrusive characteristics of magmatic rocks on the seismic profiles and the lateral distribution along the major faults of magmatic rocks were described specifically.On the time scale,four stages of magmatic activity were recognized including 108-115 Ma and 134-145 Ma which occurred in Early Cretaceous.When combined the magmatic activity with regional geological analysis,we believed that magmatic activity exceptionally fierce in the early period of Early Cretaceous.At that time,Izanagi plate oblique dived beneath the Eurasian plate along the NNW with high-speed and low angle.At the same time,the Pacific plate dived in SW.Under the plate shearing action,the Tanlu fault zone started to sinistral strike-slip which generated the sin-istral stretching environment around North Yellow Sea basin.Therefore,the derived NW dextral and SN sinistral secondary conjugate fault systems inside the basin controlled the intrusion of magmatic diapir activity.After a comprehensive analysis,the coupling relationship between magmatic activity,fault evolution characteristics,and regional plate movement had been confirmed.

关 键 词：中国东部 北黄海盆地 岩浆活动 构造学 耦合关系. 

分 类 号：P548[天文地球—构造地质学]