As the Dabieshan crust underwent extensive post-orogenic migmatization, magmatism and metamorphism during the Mesozoic, petrologic information about the Triassic collision and the following ultrahigh-pressure (UHP) metamorphism was mostly destroyed by either the erosion or the migmatization. It seems very difficult to solve the geodynamic problems related to the collision and exhumation of the UHP rocks based on petrologic and geological data. Therefore, geophysical experiments and deep crustal research become important. Geophysical investigations with seismic and MT methods were carried out in Dabieshan area in the late 1990s, producing detailed results about crustal structures with good compatibility between different geophysical methods. After integrated interpretation of both geophysical and geological data, I compile a crustal section across Dabieshan that seems more reliable and provides much more structural details. The Dabie orogenic belt can be divided into the 4 geologic units from north to south: the North Huaiyang, the North Dabie, the South Dabie and the Susong. The northward subduction of the Yangtze craton caused that the Yangtze crust inserted into the middle and lower crust in Susong high-pressure metamorphic zone, whilst the middle and lower crust below the North Huaiyang might contains the crust of the Sino-Korean craton. The middle and lower crust in the South Dabie is rather different from what in the North Dabie, showing that the North and the south Dabie had different evolutional trajectories and should not belong to a tectonic unit. The current crustal pattern has resulted mainly from deformation caused by the northward intracontinental subduction of the Yangtze craton during the Jurassic, and later crustal extension together with doming and unroofing around the North Dabie. It can be inferred that the suture zone of the Triassic collision between the Sino-Korean and the Yangtze was located along the Xiaotian-Mozitan fault that was unlike a front thrust of a subduction plate. In some collision belts the suture can be an irregular zone with variable width, so the suture in Dabieshan could included adjacent stripes belonging to either the North Dabie or North Hauiyang.

大陆科学钻探不仅是打一口钻，而是深部钻探同地球物理探测结合起来的相互反馈系统，这里地球物理探测主要是指三维深反射地震。中国大陆科学钻探孔区三维地震调查是大陆科学钻探工程的一项重要内容。在数据采集中提出了全观式三维地震调查新技术，它是指排列不滚动的三维地震调查，即将地震检波器排列铺满全部测区的一种地震采集方法，尤其适合于有限面积的三维地震工作。这种方法的优点是：(1)快速高效; (2)叠加次数高; (3)与常规三维地震相比成本大幅度减少。在中国大陆科学钻探孔区内进行的全观式三维地震测量，全面实现了预期目标,包括：(1) 配合钻探查明孔区地质构造，将钻探的一孔之见扩展到深6000m、长宽超过3000m的三维岩柱；(2)提供高精度定位的地壳反射体以供标定；(3)发现中、下地壳及地幔内的反射体等。

本文简要地讨论了大别-苏鲁超高压变质带大陆科学钻探选址新采集的*地球物理调查剖面及相关地球物理成果。这些剖面以深反射地震及大地电磁测量为研究岩石圈构造的主干，结合地质资料和区域重磁平面图，讨论与分析大别—苏鲁地体的深部地质构造与岩石圈主要特征和大陆科学钻探的靶区选择的地质地球物理依据。也讨论了大陆科学钻探的靶区(江苏东海县)的地壳构造与地热研究结果,并将深度偏移地震剖面与先导孔岩心钻探结果进行了对比。