STUDY OF RELATIONSHIP BETWEEN THE PRESENT-DAY REGIONAL STRESS FIELD WITH FAULTíS GEOMETRIC PARAMETERS DETERMINING THE RELATIVE DISPLACEMENT OF THE EARTHíS CRUST IN THE SOUTH CHINA SEAAND ADJACENT AREAS

Tran Tuan Dung¹, Bui Cong Que³, Nguyen Quang Minh¹

¹Institute of Marine Geology and Geophysics, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam; E-mail: trantuandung@yahoo.com
²Graduate University of Science and Technology, Vietnam Academy of Science and Technology,18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
³Institute of Geophysics, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam; E-mail: bcque2010@gmail.com

In this paper, the present-day regional stress eld in the South China Sea is determined through the earthquake’s focalmechanismparameters that have recordedmore than 100 years. The geometric parameters of the faults (such as the location, dip angle, strike angle as well as depth, length and horizontal destructive zone) are determined by gravity, seismic data and regional stress  elds.
Here, predictive study of the magnitude and tendency of the relative displacement of the Earth’s crust are carried out by calculating and assessing the relationship between the regional stress elds with fault geometric parameters. On the basis of the Earth’s crust relative displacement, the geodynamics mechanism can be rebuilt through different geological periods in the South China Sea and adjacent areas. Magnitude and tendency of the relative displacement of the Earth’s crust are represented by the color spectrum and the vector’s magnitude. Although the displacement appears in the whole of the region, they have different intensity in particular areas with different grade fault systems.
Keywords: South China Sea, faults, present-day regional stress ! eld, Earth’s crust displacement.

Link xem bài: https://drive.google.com/file/d/10oZuC8WndBDZQJRyIim_NAKIRSd6EEIb/view