|Table of Contents|

Inversion of Three-dimensional Slip Parameters of Fault in Longmenshan Fault Zone Using Genetic Algorithm(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2011年第02期
Page:
217-220
Research Field:
地球信息科学
Publishing date:

Info

Title:
Inversion of Three-dimensional Slip Parameters of Fault in Longmenshan Fault Zone Using Genetic Algorithm
Author(s):
ZHANG Xiu-xia1; ZHANG Yong-zhi2
1. School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, Gansu, China; 2. School of Geology Engineering and Surveying, Chang'an Universtiy, Xi'an 710054, Shaanxi, China
Keywords:
genetic algorithm;  dislocation model;  inversion;  GPS measurement;  slip parameter;  Longmenshan fault zone;  fault;  optimal solution
PACS:
P227
DOI:
-
Abstract:
Based on the dislocation theory model, genetic algorithm was used to inverse the three-dimensional slip parameter of fault. The GPS data from 2004 to 2007 in the western of Sichuan were used to calculate the three-dimensional slip rates of the main faults in Longmenshan fault zone. The results showed that the inversion, which accorded with the geological result, was low on the whole, strike-slip component |U1|<3.2 mm/a, dip-slip component |U2|<1.54 mm/a, stretch component |U3|<2.5 mm/a; low slip rate indicated the closure of the fault, the accumulation of stress and the probability of megaseism; part component, which was lager than the geological result, indicated that the actual GPS data inversion displayed the real-time active state of the fault; the results were stable because of the global convergence and independent initial value of genetic algorithm; stretch component indicated that the part was irregular and the space activities of different sub-faults were inhomogeneous.

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Last Update: 2011-06-20