A new view on division of terranes and their tectonic evolution in Fujian Province

Based on abundant geological data,this paper divides geologically Fujian province into four distinct terranes,namely,Northwest Fujian terrane,Southwest Fujian terrane,East Fujian terrane and Southeast Fujian terrane,and correlates their geological features in detail respectively.Through the study on collision-amalgamation history of each terrrane,it can be concluded that they mainly underwent three stages:(1)in Late Proterozoic,the Southwest Fujian terrane and Northwest Fujian terrane collided and amalgamated along the Nanping-Ninghua fracture zone,being accompanied by submarine and continental volcanic eruptions;(2)in Triassic,the East Fujian terrane collided and amalgamated with the Southwest Fujian terrane and Northwest Fujian terrane along the Zhenghe-Dapu fracture belt,and the Southeast Fujian terrane amalgamated simultaneously with the East Fujian terrane;(3)in Cretaceous,the Southwest Fujian terrane underwent a left-lateral strike slip along the Pingtan-Dongshan fracture zone.