Sedimentation in Syn-Rift Set of Austalia Continent Series in east part of West-Timor, East Nusa Tenggara

Abstract

Abstract West Timor is a collision product of Banda Island and Australia Continental. It is the youngest collision product on the earth. The measuring section in the study area was assigned to know the outcrop and lithology of the study area. Aside, the biostratigraphy examination including pollen and large foraminifera and gravity measurement were assigned in the study area to understand the sedimentation system in the study area. The objective of the study is to ascertain the tectonic events and the basin filling of the study area in the West Timor of the syn-rift system. Based on the research conducted, the result indicates that the tectonostartigraphy in West Timor consists of syn-rift, post-rift, and syn-orogeny. The basin was formed in the Late Permian and the sediments were deposited in the terrestrial (lacustrine) environment. The rifting in the West Timor basin occurred in Late Permian-Jura and the sediments were initially deposited in the terrestrial and deepening to the deep marine during Trias and Jura. The Post-rift of West Timor occurred in the Cretaceous-Miocene. In the post-rift event, deep marine sediment was deposited.