作　　者： (陈赟）; (丁巍伟）; (郑勇）; (邓阳凡）; (田晓峰）; (郭希）;

机构地区： 中国科学院地质与地球物理研究所岩石圈演化国家重点实验室,北京100029

出　　处： 《矿物岩石地球化学通报》 2017年第4期560-566,共7页

摘　　要： 伴随着中生代全球构造格局的重大转变,东亚大陆发生了多旋回地壳变形、大规模岩浆活动和爆发式金属成矿作用等重大地质事件,长期以来备受地学界关注,但迄今燕山运动的动力学机制、深部过程与大规模成矿作用机理等重大科学问题尚未根本解决。在国家重点研发计划"深地资源勘查开采"重点专项项目"燕山期重大地质事件的深部过程与资源效应"的资助下,本课题拟横跨中国东部郯庐断裂带南段和东海陆架区,组织实施综合地球物理剖面海-陆联测,结合徐淮及邻区宽频带流动地震台阵探测和区域重力/地磁异常分析,系统构建华北南缘及扬子陆缘地区深部结构的大深度、高精度、多参数地球物理探测体系,揭示太平洋俯冲作用关键区段的壳幔精细结构与物性特征,为探讨燕山期重大地质事件的深部过程和时空演化提供系统的地球物理约束。 In the period of Yanshanian Movement,many major geologic events,including multiple-cycle crustal deformation,massive magmatic activities and explosive-type metal mineralization,have happened. Whereas,the geodynamic mechanism,deep process and metallogenic mechanism related to the Yanshanian Movement are still open to discuss. With the support from the key project of the Yanshanian Event： Deep Process and Resources（ YANSHAN,a DREAM project from MOST,China）,we will conduct a comprehensive geophysical investigation in the key zones related to the subduction of the paleo-Pacific Plate. The project will include a synchronous onshore-offshore geophysical investigation along the corridor transecting the continental shelf of East China Sea and the southern Tan-Lu fault,a broad-band seismic array deployed in Xuzhou-Huainan area,and the regional gravity and geomagnetics survey in east China. Fine structures and physical properties beneath these areas will be revealed,and they would provide reliable constraints on the deep process and temporal-spatial evolution of the Yanshanian Events.

关 键 词： 燕山运动 郯庐断裂带 徐淮地区 东海大陆架 综合地球物理海 陆联测 太平洋板块俯冲