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Abstract

Summary

The Bunguran Trough is an enigmatic 15 km-deep basin that straddles the Sarawak shelf-slope region, offshore Malaysia. The trough is the deepest part of the Cenozoic Sarawak Basin, comparable to the Baram Delta depocentre on the opposite (eastern) side of Central Luconia carbonate province. Despite the enormous sediment thickness, there is no gravity or bathymetric expression. A simple bouguer slab correction applied to the free-air gravity anomaly does not explain the presence of such a thick sediment-filled trough. Although its presence is known for a long time, its origin is not well understood. In this paper, we present some new insights into the nature and origin of the Bunguran Trough based on analysis of gravity and seismic data across the Sarawak Shelf. The results of this analysis have been discussed in detail by . This paper only highlights some key points.

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/content/papers/10.3997/2214-4609.202270038
2022-11-28
2024-04-28
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References

  1. Loftus, G.W.F., Jong, J., Boer, L., Hiser, D.W., Hong, M., Sankosik, H., Wang, H.D., Wee, G., 2003. NW Borneo Shelf Basin Framework Study.Unpublished Shell Report EP 2003–3166.
    [Google Scholar]
  2. Madon, M., Jong, J., 2021. Geothermal gradient and heat flow maps of offshore Malaysia: some updates and observations.Bulletin of the Geological Society of Malaysia, 71, 159–183.
    [Google Scholar]
  3. Madon, M., Jong, J., 2022. The crustal structure and evolution of the Bunguran Trough, offshore Sarawak, Malaysia.Marine and Petroleum Geology, 139, 105608.
    [Google Scholar]
  4. Sandwell, D.T., Müller, R.D.W., Smith, H.F., Garcia, E., Francis, R., 2014. New global marine gravity model from CryoSat-2 and Jason-1 reveals buried tectonic structure, Science, Vol. 346, no. 6205, pp. 65–67, doi: 10.1126/science.1258213
    https://doi.org/10.1126/science.1258213 [Google Scholar]
  5. Watts, A.B., Fairhead, J.D., 2010. A process‐oriented approach to modeling the gravity signature of continental margins.The Leading Edge, 18, 258–263. https://doi.org/10.1190/1.1438270.
    [Google Scholar]
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