Abstract - We describe the structure of a listric growth fault system from SE Asia, using high-resolution, 3-D seismic data. The fault system shows systematic changes in geometry that are sympathetic with along-strike changes in the nature of the bounding fault. Where the bounding fault remained fixed throughout extension, the hangingwall rollover and associated growth faults show apparent, progressive migration towards the bounding fault. Along strike, however, three phases of footwall collapse caused by backstepping of the bounding fault into the footwall, were responsible for a punctuated migration of both the axis of the hangingwall rollover and associated growth faults towards the footwall block during extension. Since the migration of hangingwall structures is similar to that predicted by simple analogue models with fixed detachment surfaces, care should be taken in defining kinematic models in areas where the geometry of the bounding fault is either poorly defined or unknown.
Journal of Structural Geology
25, 307-315, 2003.