HR: 0800h
AN: S11A-0285    [Abstracts]
TI: Dyke Intrusion and the effect on fault in Northern Hainan Island, China
AU: Liu, H
EM: liuhuiyq@gmail.com
AF: Institute of Geology, China Earthquake Administration, Institute of Geology, China Earthquake Administration, P.O.Box 9803£¬Beijing, China, Beijing, 100029, China
AU: * Ran, H
EM: ranhongliu@sina.com
AF: Institute of Geology, China Earthquake Administration, Institute of Geology, China Earthquake Administration, P.O.Box 9803£¬Beijing, China, Beijing, 100029, China
AU: Hong, H
EM: hanjinghong@gmail.com
AF: Institute of Geology, China Earthquake Administration, Institute of Geology, China Earthquake Administration, P.O.Box 9803£¬Beijing, China, Beijing, 100029, China
AU: Kadlec, B J
EM: Benjamin.Kadlec@colorado.edu
AF: Department of Computer Science, University of Colorado, Department of Computer Science, University of Colorado, Boulder, Boulder, CO 80304, United States
AU: Yuen, D A
EM: daveyuen@gmail.com
AF: Minnesota Supercomputing Institute, University of Minnesota, Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minneapolis, MN 55455, United States
AB: The A.D.1605 earthquake near Qiongshan caused 70 villages collapsed and were drown by seawater. Many parallel faults and high frequency Cenozoic volcanic activity is vivid feature in Northern Hainan Island. The world volcano map shows the area is in a NS-trending intraplate volcanic belt. In order to understand the form mechanism of the volcanic belt zone and investigate the fault hazard in relation with the magma activity beneath Hainan island, finite element method has been applied to simulate the double subduction (indian plate oblique subduction and philippine plate subduction). The results show double subduction induce double convection and between the two double subduction form an upwelling from the upper mantle, which is the reason of the NS- trending intraplate volcanic belt. The accurate location earthquake from 2000 to 2006 show a vertical earthquake plane, we assume it is due to the magma intrusion in a vertical dyke which has existed, in order to analyse the fault hazard, we calculate the coulomb stress on the faults due to the dyke intrusion. The modeling results show Qionghai-Wenchang fault and Puqian-Qinglan fault have the most potential hazard.
DE: 1217 Time variable gravity (7223, 7230)
DE: 1242 Seismic cycle related deformations (6924, 7209, 7223, 7230)
SC: Seismology [S]
MN: 2007 Fall Meeting