郯庐断裂带潍坊—嘉山段全新世活断层的活动方式与发震模式
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摘要
郯庐断裂带潍坊—嘉山段全新世活断层由三个独立的破裂段组成。从各段的断错地貌、松散堆积物特征、断层本身的特点以及断层泥的显微构造标志看，各段具有共同的特点，就是主要以粘滑运动为主，并在震后有蠕滑调整运动。各段具有断层闭锁→粘滑发震→震后调整→断层再次闭锁的发震模式。目前莒县—郯城段仍处于震后调整阶段，而安丘段和新沂一泗洪段则已处于断层闭锁的后期阶段，面临粘滑发震的危险
The Holocene fault in Weifang-Jiashan part of the Tanlu fault zone consists of three independent rupture segments. Based on the faulted lanforms, characteristics of loose deposits, behaviors of fault itself and marks of microstructures on each segment, we fount a common features that the movement of each segment is dominated by stick-slipping with component of creep-slipping after a great earthquake. The earthquake-generating model for each segment is fault locked→a great earthquake occurred by stick-slipping→adjusting movement with creep-slipping→fault locked again. At present, the Juxian-Tancheng segment is still in the adjusting stage after the 1668 Tancheng earthquake while the Anqiu and Xinyi-Sihong segments are in the late fault-locked stage, that means these two segments will suffer a danger to recur strong earthquakes respectively.
The Holocene fault in Weifang-Jiashan part of the Tanlu fault zone consists of three independent rupture segments. Based on the faulted lanforms, characteristics of loose deposits, behaviors of fault itself and marks of microstructures on each segment, we fount a common features that the movement of each segment is dominated by stick-slipping with component of creep-slipping after a great earthquake. The earthquake-generating model for each segment is fault locked→a great earthquake occurred by stick-slipping→adjusting movement with creep-slipping→fault locked again. At present, the Juxian-Tancheng segment is still in the adjusting stage after the 1668 Tancheng earthquake while the Anqiu and Xinyi-Sihong segments are in the late fault-locked stage, that means these two segments will suffer a danger to recur strong earthquakes respectively.
引文
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