Structure and evolution of the active fold and thrust belt of southwestern Taiwan using GPS geodesy

Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to digital@library.tamu.edu, referencing the URI of the item.Includes bibliographical references (leaves 54-56).Using GPS and published geologic data, we have crographics. investigated the current deformation rates and local kinematic relationships for the southern region of the Taiwan fold-thrust belt. The GPS measurements suggest complex motions across the strike of this region. Although there is a general decrease in motion from east to west, significant variations occur across local structures. Deformation across southern Taiwan is neither halogenous, nor distributed evenly across its surface. The structures that appear to be the most active in this area include: 1) the Yuching syncline that accommodates 1.75 cm/-yr of displacement across its axis, 2) a significant regional transfer of displacement ( 1+ cm/-yr) across the Michih transverse fault, 3) from north to south, a dramatic change in the width of the deformation front of the fold and thrust belt which is accentuated across the Michih fault, and 4) the Tulungwan fault, a bounding fault between the Western Foothills and the Slate Belt, appears to be a nearly vertical oblique transverse fault with a significant degree of left-lateral motion across it. As a result, the actual pattern of deformation is very different from that predicted by 2-dimensional wedge models