Abstract
About 350 faults and slickenlines have been measured in the western part of the Cimandiri Fault Zone on Java Island. This fault zone trends N7-°E and corresponds to the limit of the Southern Mountains and Cimandiri-Bandung area. The data used in this study are mostly microfaults which range in length from a few centimeters to a few meters. On the basis of fault slip data, orientations of paleostresses have been computed. Four strike-slip fault regimes have been identified. Normal faulting seems to be associated with strike-slip regimes. Our results of paleostress reconstruction using fault data from Cimandiri Fault Zone support the hypothesis of stress reorientation along a major strike-slip fault (Anderson 1951). The paleostresses directions enable us to deduce the main fault movement. The Cimandiri Fault Zone is interpreted as a sinistral strike-slip fault zone. The dynamic model initiated by Anderson (1951) and modified by Price and Cosgrove (1990) explains the Cenozoic paleostress succession in the Cimandiri Fault.
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