【摘要】 在穿过苏鲁地体的郯城-涟水剖面上进行了深反射地震和大地电磁调查，剖面全长１３９．５ｋｍ，取得了高质量记录，一级品记录高达８５％。结果表明：（１）苏鲁超高压－高压变质岩片向北西倾斜，表现为高速高阻岩片，并受到强烈的变形，反映了超高压岩片的俯冲与折返；（２）杨子克拉通向北俯冲在苏鲁地体之下，表现为常速、中低阻的挠曲板状体，内部有大量反映碰撞的反射楔形体；（３）嘉山-响水断裂带向南陡倾，低阻带直通浅地幔，具有燕山期裂谷的特征，估计有可能是与沂沭断裂带同期的中生代裂谷；（４）印支期俯冲扬子地壳的古Ｍｏｈｏ面与期后形成的新Ｍｏｈｏ面都有强反射，表明中新生代在地壳底部有强烈的岩浆活动与壳幔相互作用，促使新Ｍｏｈｏ面的形成；（５）超高压变质带下方有一组南倾的逆断层，与折返有关，在此处进行科学钻探对了解超高压变质带形成和折返机制很有利。更多还原

【Abstract】 Deep seismic reflection and MT surveys along an 139km profile across the SuluUHPM terrane from Tangchen to Lianshui have been completed, producing highquality records and rich geological information about crustal structures. The resultsinclude (a) The Sulu UHPM and HPM terrane is a rock-slice with high velocity andresistivity, dipping northwest and undergone heavy deformation, implying itssubduction and then exhumation during Track Period, (b) the Yangtze craton,showing as a bent plate with normal velocity and relatively low resistivity, wassubducting northward beneath the Sulu UHPM terrane, containing a lot of wedgereflectors related to the collision between the Sulu and the Yangtze; (c) the Jiashan-Xionzhui fault zone contains two faults of steeply dipping south, corresponding to alow-resistivity zone reaching the oppermost mantle, probably implying that it might bea Mesozoic rift similar to the Ni-Shu Fault zone; (d) both the old Moho of theIndosinian subducting Yangtze crust and the new Moho formed after IndosinianMovement have strong and clear reflectors, indicating strong magmatic activities andinteraction between the crust of the mantle during Mesozoic Period which contributedto the formation and the new Moho; and (e) a group of thrusts exist in the uppercrust under the Sulu UHPM belt which may closely related to the exhumation of theUHPM belt, encouraging the scientific drilling in the South Sulu area whose aimsinclude revealing the exhumation dynamics of the UHPM belt.更多还原