Gently dipping normal faults identified with Space Shuttle radar topography data in central Sulawesi, Indonesia, and some implications for fault mechanics

摘要: Abstract Space-shuttle radar topography data from central Sulawesi, Indonesia, reveal two corrugated, domal landforms, covering hundreds to thousands of square kilometers, that are bounded the north by an abrupt transition typical hilly mountainous topography. These landforms readily interpreted as metamorphic core complexes, interpretation consistent with a single previous field study, and northward in topographic style is marking trace extensional detachment faults active or were recently active. Fault dip, determined slope exhumed fault footwalls, ranges 4° 18°. Application critical-taper theory dip hanging-wall surface slope, similar several other suggests theoretical limit three degrees for detachment-fault dip. This result appears conflict dearth seismological evidence slip on dipping less than ~ 30°. The convex-upward form gently however, allows greater at depths earthquake initiation dominant energy release. Thus, there may be no between mapping studies this class faults.