The Influence of the Digul Fault on the Formation and Evolution of the South Papua Sedimentary Basin in the Context of the Extension of the North Australian Basin

South Papua is a complex geological region, particularly due to its position as a structural extension of the North Australian sedimentary basin. In this region, the Southern Papua Basin developed along with
intensive tectonic activity, one of which is the influence of the Digul Fault.

This study aims to evaluate the relationship between the fault system and the formation and evolution of basin stratigraphy in the Asmat region and its surroundings. Based on the interpretation of regional geological, lithological, and geophysical data, it is known that the Digul fault acts as the main structural boundary that controls sedimentation from the Miocene to the Recent. This fault activity triggered the formation of graben and half-graben systems that accommodated the accumulation of clastic and carbonate sediments in fluvial to deltaic environments.

This study also indicates that the existence of these structures can influence the potential for hydrocarbon traps and active tectonic dynamics in South Papua.

Keywords: South Papua, Digul fault, sedimentary basin, Asmat, Australian tectonics, hydrocarbons