Sunday, February 28, 2016

Tectonic History and Stratigraphic Framework In Biliton Basin

Five major tectonic events effected the structural development of the Biliton Basin. In order from the oldest to most recent: (Atkinson et al, 2004).


  • Late Cretaceous to Early Eocene (100-56 Ma)
 Regional metamorphism generated by subduction and evolution of the Meratus arc. Deformation, uplift, erosion and cooling occured in the Paleocene.


  • Eocene (50-40 Ma)
Indian plate collides with Eurasian coupled with change in relative plate motions of the Pacific Plate. This gives rise to dextral wrenching of the southern margin of the Sunda craton.


  • Mid Oligocene (34-30 Ma)
South China Sea rifting and accretion in Northern Kalimantan. The New Guinea margin of the Australian plate collides with several arc complexes.


  • Mid Miocene (17-10 Ma)
South China Sea rifting ceases with the collision of continental derived Gondwana fragments (Northern Australia/ Western Papua) against the eastern Sunda Margin.


  • Late Miocene (7-5 Ma)
Northwest Australia collides with the Sunda Craton with development of the Sunda Trench and Indonesian Arc.


reference: Atkinson, C., Renolds, M., Clarke, A., Sampurno, 2004, Why Look In Deepwater When Elephants Prefer The Shallows, The Biliton Basin Revisited, Indonesia Petroleum Association Symposium.

Wednesday, February 3, 2016

Channel-lobe complex

The channel-lobe complex as the dominant depositional system indicates a dynamic fluidized current as the agent of deposition. The presence of relatively parallel layers suggests deposition by turbulent flows. The ability of the current to transport abundant sediment that create a very broad channel-lobe system (up to several kilometers) indicates that this current is high density and possibly high velocity.