Active Deformation and Paleostress Analysis in the Pakua Anticline Area of Western Taiwan

This paper presents a review of strain-stress relationships in the activeTaiwan collision at different scales based on numerical modeling.As thedigital computer has become an important research tool due to its capabilityof performing numerical simulations of real tectonic processes,a massof accurate and comprehensive database is required to assure the meaningfulnessand accuracy of simulation results.The aim of this study is to refinethe general interpretation of the relationships between active deformationand geological structures.Through an evaluation of the presence and roleof mechanical decoupling along major faults,distinctive attention will bedevoted to the role of geological discontinuities.Such decoupling plays animportant role in the distribution of regional and local stress and velocitypatterns.In this paper,the relationship between the complexity of modelingand the data within the range of data uncertainties is also discussed inorder to determine the level of complexity at which a model can be built,validated and considered significant.The construction of numerical simulationdepends on the scale of the model and on the data available as constraintswithin that scale.The study of the Taiwan collision case providesan illustration of the relationships between kinematics,structure and/orstrain fields in a curved belt.It is claimed that although 2-D numericalmodeling provides valuable results,validation through 3-D modeling experimentsis indispensable in accounting for the oblique dips of major boundaries.

並列關鍵字

Deformation ； Fault ； Pakua ； Quaternary ； Paleostress ； Taiwan

國際替代計量

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