Indication Strike Slip Movement A Part of Sorong Fault Zone in Yapen Island, Papua, Indonesia.

The Sorong Fault Zone is located northern of Papua Island. It is movement from the body bird of Papua Island toward south-southeast of Halmahera Island and spreading to east part of Celebes Island, and overstepped east part of Yapen Island which occupy in Bird's Neck of Papua. This fault became a border between Caroline oceanic plate (part of pacific oceanic plate) and Australian continental plate. Instead, The Sorong Fault Zone was controlled forming of Salawati Basin in west in the direction of Yapen Island. The Sorong Fault, Lengguru Fold belt, Tarera-Aiduna Fault, and Seram Thrust are structural features associated with the collision between the Australian continental plate and the Pacific oceanic plate at Oligo-Miocene as regional uplift. Sorong Fault Zone in research area, there are shear zone, minor fault, brecciation zone, and lineament in Cataclastic Breccia Formation. The research was conducted in the Sumberbaba area, Yapen Timur subdistrict, Yapen Waropen district with fieldwork as the main method. The Sumberbaba area is located appropriate in Sorong Fault Zone. The general structure pattern worked in research area is northwest-southeast direction with strike-slip movement. The lithologies at the area are Cataclastic Breccia in late Miocene, tuffaceous sandstone and tuffaceous breccias for Volcanic Yapen Formation in Late Eocene to early Miocene, limestone for Wurui Formation in early Miocene, and sandstone for Kurudu Formation in early Pliocene. Structural analysis in this area used to the measurement method of collecting structure evidence. There are shear fracture, extension fracture, brecciation, and fault gauge in outcrops. The characteristics of that should have shear orientation consist of strike of shear plane, dip, and slickenside. The main of common lineament orientation at the fault in research area has NW-SE (almost W-E) and it is appropriately following the Sorong Fault Zone. [ABSTRACT FROM AUTHOR]