The tectonic evolution of the southeast coast since the Late Cretaceous is a key scientific issue in analyzing the present tectonic framework of South China.Currently,there is still no continuous profile data that can explain the complete sedimentary sequence in Southeast Coast of China.The Heyuan Basin in Eastern Guangdong of China is one of the large-scale Late Mesozoic-Cenozoic continental basins in Southeast Coast of China.There are relatively complete Late Cretaceous-Neogene strata in Heyuan Basin.Studying the deep structure,basin-controlled faults,sedimentary sequence and basin formation and development in Heyuan Basin is of great significance for understanding the tectonic evolution of Late Mesozoic-Neogene along the coast of South China.Based on the field geological survey geophysical reflection profile and the scientific geological drilling of about 2 km,this paper established the three-stage sedimentary sequence of the Late Cretaceous-Neogene in the basin.This paper discloses the development characteristics of boundary faults and internal structures in the basic based on geophysical exploration and combined with the Oligocene structure of volcanic rock,which indicates that the destruction of the prototype basin occurred in Cenozoic.Videlicet,the Zijin-Boluo thrust fault and Heyuan fault on both sides of the basin strongly reformed the prototype basin in Late Paleogene-Neogene.Based on the above understanding,the sedimentary sequence-tectonic evolution model of Heyuan Basin is preliminarily established.
关键词
河源盆地/沉积序列/反射地震/构造演化/控盆断裂/科学钻探/东南沿海
Key words
Heyuan Basin/sedimentary sequence/seismic reflection/tectonic evolution/basin-controlling fault/scientific drilling/Southeast Coast of China
维普
万方数据