舟山群岛地区的地质构造背景  

ON GEOLOGIC TECTONIC BACKGROUND IN ZHOUSHAN ARCHIPELAGO AREA

作　　者：汪豫忠 

机构地区：[1]浙江省地震局

出　　处：《华南地震》1995年第1期55-61,共7页South China Journal of Seismology

基　　金：浙江省地震局合同制项目

摘　　要：从大地构造、磁场和新构造分区特点等方面，对舟山群岛地区的地质构造背景作了较为详细的论述。指出该区处于基底构造交汇、新构造和地震活动强弱分区的过渡地带，新构造运动在中更新世之后超于平稳；全新世为间歇性活动，强度较弱。基底由若干微块体组成，块体间为不稳定边界。舟山群岛及其海域深部以东西向、浅表部以北北东和北东向构造为主，具有孕震和发震的地质构造背景。We made detailed discuss on geologic tetonic background in Zhoushan Archipelago area,according to characteristics of geotetonics, magnetic field and neo-tectonic zoning. The study expressed that this area belonged to the transforming region of the junction of basement structure, neo-tectonic movement and seismic activity zoning; neotectonic movement changed as follows: from the intensity before Mosepleisocene to stable movement and then to intermittent motion in Holocene; basement consisted of micro-masses and the boundary was unstable; in Zhoushan archipelago and vicinity area, the main structure was in WE direction in deep layer and in NNE direction in shallow one; there existed the geologic tectonic background of seismogenic condition.

关 键 词：新构造运动 地震构造 舟山群岛地区 地震地质 

分 类 号：P315.2[天文地球—地震学] P54[天文地球—固体地球物理学]