郯庐断裂带莱州湾段的构造特征

ACTIVE TECTONICS IN LAIZHOU BAY SEGMENT OF TANCHENG-LUJIANG FAULT ZONE

本文利用海上浅层地震勘探剖面分析了郯庐断裂带莱州湾段的上更新统、全新统和活动构造的某些特征。晚更新世末期发生的构造运动使上更新统产生断裂与褶皱,沿郯庐断裂带东主干断裂发育了狭长的背斜构造,在西主干断裂两侧次级横向(东西向)断裂十分发育,这些横向断裂是一些高角度的张性正断层。

In this paper, some characteristics of Holocene Series, upper Pleistocene Series and active tectonics in Laizhou Bay segment of Tan-Lu Fault Zone are analysed by use of the shallow seismic surveying profiles. The tectonic action occurred at the end of Pleistocene epoch made upper Pleistocene Series form faults and folds, and a long and narrow arch fold was generated along the east main fault of Tan-Lu Fault Zone. At the two sides of the west main fault, the inferior cross faults (E—W) were developed fully, and they were tension normal faults with high angles.