Preliminary Structural Segmentation of the Yangsan Fault

양산단층의 구조적 분절화 기초연구

Most large strike-slip faults do not rupture their entire length during single faulting but generally break in segments which are different in location and time of faulting. Studies related to the development of the Yangsan fault have been reported based on partial results from characteristics of geolgocial distribution, geophysical prospecting and paleostress analyses. This paper shows, based on preliminary results, that the Yangsan fault could be divided into four structural areas along entire length. These areas are different in geological distribution, bedding attitude measured from sedimentary rocks, strike of main fault, geometry of small faults, termination types of fault tips, cyclic variation of fault zone width, and arrangement of paleostress. Therefore, the Yangsan fault could be divided into at least four segments.