郯庐断裂带在新生代的演化

论述了郯庐断裂带在新生代的活动性。根据其活动特点，郯庐断裂带的活动可分5个时期：①古新世至早始新世，除沂沭断裂带中、南段为右行走滑运动外，其余地段都为张裂活动；②中始新世至渐新世，莱州湾以北地段以张性活动为主，而以南则为压性逆冲活动；③中新世至早更新世，渤海湾地区张裂活动强，其以北地区较强，而以南地区弱，且兼有左行滑动；④中更新世，断理解活动平静，在沂沭断裂带中形态该时期的夷平面；⑤晚更新世至今，淮河以北地区，尤其沂沭断裂带，断裂活动强烈，其性质为右行走滑－－逆冲。

ON THE ACTIVITY OF THE TANCHENG LUJIANG FAULT ZONE DURING CENOZOIC

In this paper the activity of the Tancheng Lujiang fault zone during Cenozoic is recognized as five stages based on its active characteristics. (1) At the stage of Paleocene early Eocene,the Tancheng Lujiang fault zone,with the exception of right lateral slip at the middle and south parts of the Yishu fault zone,showed strong tensile activities; (2) During middle Eocene and Oligocene, tensile activities occured in the region to the north of Laizhouwan, while compressive thrusting activities happened in the section to the south of Laizhouwan; (3) From Miocene to early Pleistocene,tensional behaviours are extremely strong in Bohai sea area,relatively strong in the segment to the north of Bohai sea and weak in the segment to the south of Bohai sea; (4) In middle Pleistocene, the fault zone did not occur obvious activities and the planation surface was formed in the Yishu fault zone; (5) During late Pleistocene and Holocene,the activities of Tancheng Lujiang fault zone,especially Yishu fault zone segment, showed in patterns thrusting with right lateral slip.