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This thesis aims to establish how the late Cenozoic oblique convergence of the Pacific- Caroline and Australian plates has affected the tectonic history of the eastern Bird’s Head Peninsula in northwestern New Guinea. Emphasis is placed on insights provided by >5 magnitude earthquakes since 1976 and the structural geology of Miocene-Pleistocene sediments in the Manokwari area and Permian to Paleogene units of the northern Lengguru Fold Belt around Mawi Bay. The Bird's Head Peninsula is moving west- southwest relative to the Australian Plate based on GPS data, but slower than the west- southwest movement of the Pacific-Caroline Plate. This accounts for plate convergence between the Pacific-Caroline Plate and the Bird's Head Peninsula consistent with earthquakes caused by gently south dipping thrusts in an arc along the northern Bird’s Head coastline and indicating subduction along the Manokwari Trough. Southwards subduction along the New Guinea Trench to the northeast o ....

Head Peninsula , Lengguru Fold Belt , Australian Plate , Pacific Caroline Plate , New Guinea Trench , Yapen Island , Yapen Fault , Cendrawasih Bay , Sorong Fault , Kemum High , Tarera Aiduna Fault , Pleistocene Manokwari Limestone , Ransiki Fault , Permian Mawi Complex , Upper Triassic , Lower Jurassic Tipuma , Late Permian , Early Triassic , East Gondwanan Andean , Mawi Complex , Pliocene Lengguru Fold , Central Bird , Head Monocline , Oblique Convergence , Birds Head ,