Evolution of Mesozoic Sedimentary Basins in Wuyi-Yunkai Area
Tang Tingting
He Weihong
Wang Chenggang
Ji Xingxing
Hao Yiwei
Zou Yarui
Abstract：In order to study the sendimentary basin evolution of the Wuyi-Yunkai area,in this paper the area is divided into 5 stratigraphic regions.Based on the previous studies on the lithostritagraphy combinations,fossil assemblages,isotopic geochro-nology and tectonics of this area,types of sedimentary basin in the Wuyi-Yunkai area are identified,and their formation and evolution are investigated.The evolutional history of the sedimentary and tectonic features of the study area shows that the ba-sin and structure have experienced three major evolutionary stages in Mesozoic.In the Early-Middle Triassic,the research area entered the marine-continental alternating epicontinental sea stage because of transgressions with the crust uplifting,the main sea level dropping and the sea gradually receding to the west or southwest.In the Middle Jurassic-Cretaceous,a series of sub-duction-accretionary complex belt formed in Taiwan,and inland areas were bounded by the Zhenghe-Dapu fracture,with fault basin (including volcanoes)developed in the west and its east entering evolutionary stage of intra-arc graben basin whose late stage was fault basin evolution,mainly influenced by the low subduction of the Pacific plate.
Keywords：Wuyi-YukaiMesozoicsedimentologytectonicsevolution
Publication Date：2014-01-01
Pages：15( 1140-1154 )