Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5781810 | Tectonophysics | 2016 | 35 Pages |
Abstract
Knowledge of the crustal structure is important for understanding the tectonic framework and geological evolution of southeastern China and adjacent areas. In this study, we integrated the datasets from the TAIGER (TAiwan Integrated GEodynamic Research) and ATSEE (Across Taiwan Strait Explosion Experiment) projects to resolve onshore-offshore deep crustal seismic profiles from the Wuyi-Yunkai orogen to the Taiwan orogen in southeastern China. Three seismic profiles were resolved, and the longest profile was 850Â km. Unlike 2D and 3D first arrival travel-time tomography from previous studies, we used both refracted and reflected phases (Pg, Pn, PcP, and PmP) to model the crustal structures and the crustal reflectors. In total, data from 40 shots, 2 earthquakes, and approximately 1,950 stations were used; 15,612 arrivals were selected among three transects. Using these data, we determined the complex crustal evolution since the Paleozoic era , involving the closed Paleozoic rift basin in central Fujian, the Cenozoic extension due to the South China Sea opening beneath the coastline of southern Fujian, and the on-going collision of the Taiwan orogen. The shape of the Moho, which also reflects the crustal evolution, can be summarized as follows: ~Â 30Â km deep to the west of Fujian, deepening toward central Fujian (~Â 35Â km), becoming shallower toward the Taiwan Strait (~Â 28Â km), deepening again toward the mountain belt of Taiwan (~Â 42Â km), and becoming shallower toward the Pacific Ocean (~Â 10Â km).
Keywords
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Earth-Surface Processes
Authors
Yao-Wen Kuo, Chien-Ying Wang, Hao Kuo-Chen, Xin Jin, Hui-Teng Cai, Jing-Yi Lin, Francis T. Wu, Horng-Yuan Yen, Bor-Shouh Huang, Wen-Tzong Liang, David Okaya, Larry Brown,