摘要
福建东南沿海断裂1 多发生于上地壳硅铝层 ,少数达硅镁层。呈直线形展布 ,倾角≥60°。驱动力主要来自碰撞 ,强烈片理化伴随矿物重结晶为其显著标志。主活动期早白垩世晚期 ,同位素年龄 86～ 93 Ma。早白垩世期间库拉板块向亚洲板块俯冲 ,位于东海与台湾海峡之间的闽江口 ,北纬 2 6°附近海岸线自北往南 ,由北北东向北东偏转 ,形成北西、北东、北北东、北西西交切格局 ,它们具有时间上一致性、空间上网络性和成因相关性等特征。早第三纪抬升剥蚀后 ,挽近时期有增无减。
Most of the faults in the southeast coast of Fujian Province occur in the sial of upper crust and some have reached the sima.They are distributed by a linear shape with a dip angle≥60°.Their driving forces come mainly from the plate collision,the obvious marking of which is intensive schistosity and mineral recrystallization.Their main activities are in the late stage of Early Cretaceous and the isotopic age 86～93Ma.In the period of Early Cretaceous,the Kula Plate underthrusted into the Asiatic Plate so that it deflected from NNE to NE the coastal lines in the mouth of Minjiang River(about 26°N)located between the East China Sea and Taiwan Strait and formed the NE,NNE and NWW intersecting pattern of faults,which have features of a concordance in time,a network in space and genetic correlation.The elevation and denudation of the coast took place in Early Tertiary and went on in the neoid period.
出处
《福建地质》
2000年第2期90-96,共7页
Geology of Fujian
关键词
硅铝层
直线形
片理
库拉板块
福建
断裂格局
sial,linear shape,schistosity,Kula Plate,Late stage of Early Cretaceous
