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Nghiên cứu tốc độ chuyển dịch kiến tạo cho phép đánh giá định lượng được hướng và độ lớn chuyển dịch ngang cũng như dịch chuyển thẳng đứng, sự thay đổi tốc độ chuyển dịch kiến tạo theo không gian thông qua phân tích biến dạng. | Đặc điểm địa động lực hiện đại khu vực ven biển Nam Trung Bộ và mối liên quan với các tai biến địa chất Vietnam Journal of Marine Science and Technology Vol. 19 No. 3B 2019 125 136 DOI https doi.org 10.15625 1859-3097 19 3B 14520 https www.vjs.ac.vn index.php jmst Recent geodynamic characteristics of the Southern Central coast and the relations with geological hazards Bui Nhi Thanh1 Nguyen Van Luong2 Duong Quoc Hung1 Nguyen Van Diep1 Mai Duc Dong1 1 Institute of Marine Geology and Geophysics VAST Vietnam 2 Vietnam Geophysical Science and Technology Association Hanoi Vietnam E-mail tbn8691@gmail.com Received 25 July 2019 Accepted 6 October 2019 2019 Vietnam Academy of Science and Technology VAST Abstract Recent geodynamic characteristics of the Southern Central coast are analyzed on the basis of vertical and horizontal displacement velocities along active fault zones. The horizontal displacement velocity varies in magnitude from this fault system to another fault system from 0.11 0.3 mm year on the strike-slip - normal faults to 0 0.058 mm year on the strike-slip faults and normal faults. The subsidence velocity changes complicatedly different from one fault to another fault depending on the mechanism of faults. On the continental shelf most of the values of high subsidence s velocity are related to the normal and strike-slip faults. Subsidence activities make the sea level increase highly the subsidence activity makes the sea level rise at structures that fall close to the shore reach about 0.2 0.48 mm year in late Pleistocene - Holocene. The increase of sea level directly affects the intensity of erosion flood salinity and land loss events in coastal lowlands. Slippage of the seabed earthquakes volcanoes are geological hazards directly related to the geodynamic regime of the Southern Central coast. Keywords Recent geodynamic displacement velocity Southern Central coast of Vietnam. Citation Bui Nhi Thanh Nguyen Van Luong Duong Quoc Hung Nguyen Van Diep Mai Duc .
