厦门篔筜港一钟宅断裂带的活动性

ACTIVITY OF THE YUANDANGGANG—ZHONGZHAI FAULT ZONE IN XIAMEN

本文根据野外地质、地貌与第四纪地质调查,结合卫片和航片影象分析等,论述了筼筜港—钟宅断裂带的存在,并从地貌面、沉积物、风化层的变形、断裂物质、地形、水系及微地震等方面分析了该断裂带自距今30k—40ka以来的活动性问题。

Based on the field surveys of geology, geomorphology and Quaternary geology, analyses of satellite images and aerial photoes, and micro-scale seismological observations, activity of the Yuandanggang—Zhongzhai fault zone is analysed. The results show that the Yuandanggang—Zhongzhai fault zone is actually a subside zone of graben type, and the subside zone is controlled mainly by the Guanxun—Wushipu fault and Wenzao—Longshan fault. Since 30k—40ka, B. P., these fault have been relatively stable without distinct vertical differences. In the near future, the crustal movement in the area will have on the whole, intermittent and slow uplift. The subside graben zone has been relatively more stable since 35ka, B. P..