Publications

Currently, several hydrocarbon exploration ideas are directing themselves towards the deep water deposits which are basically gravity mass-flow affected type. The complexities of such deposits require a good understanding including depositional mechanism, facies and their implications. The incompleteness of Bouma Sequence as well as the occurrence of submarine fan depositional pattern at Cinambo Formation outcrop have encouraged researchers to propose more integrated deep water depositional model obtained from direct field measurement which can be combined with the existing facies models such as Submarine Fan Model (Shanmugam and Mojola, 1988) and Bouma Sequence Turbidite Model (Bouma, 1962). The proposed model is expected to be a good analog model useful for the deep water deposit understanding. This study uses stratigraphic measuring section method as well as paleoslope measurement. Based on observation and analysis, Cinambo Formation was deposited in submarine channel, submarine slope, submarine fan and basin floor environments which evolved gradually. These environments can be classified based on 5 lithofacies classification with facies A1 and facies A2 as submarine channel, facies B as submarine slope, facies C as submarine fan and facies D as basin floor. Paleoslope analysis was conducted on facies B in order to investigate the paleogeography direction during the deposition of Cinambo Formation. The result of this analysis is obtained from slump deposit by measuring the direction and plunge of the axial plane. The paleoslope measurement result is N 115° E, 40° SE. This plunge direction is different with those of the previous studies which concluded that the general direction of turbidite fan pattern to be NNE. This results in the change of contemporary deep water depositional paleogeography. Keywords: Cinambo Formation, Paleoslope, Bogor Trough, Turbidite and Submarine Fan