• OpenAccess
  • Paleoenvironmental Implications from Biomarker Investigations on the Pliocene Lower Sajau Lignite Seam in Kasai Area, Berau Basin, Northeast Kalimantan, Indonesia  [ICGG 2015]
  • DOI: 10.4236/gep.2015.35016   PP.140 - 152
  • Author(s)
  • Khalda Az Zahra, Ahmad Helman Hamdani, R. Tina Rosmalina
  • Pliocene age lignites from Lower Sajau seam, from borehole in Berau Basin, Northeast Kalimantan, Indonesia were investigated with respect to organic geochemistry by HPLC, GC and GC/MS. The analysis was conducted to drilling sequence of Kasai Coal Field, Berau Basin which has been applied to identify organic sources and maturity of organic matter. The result of normalized yields of the soluble organic matter (SOM) data indicates saturated and aromatic proportion of hydrocarbon are very low (under 10%), this was reflecting that lignite coal is still in immature stage. Moreover, biomarker hydrocarbon such as diterpenoids was not found from the sample that indicates absence of gymnosperm precursor in the paleo-peat. In contrast, there was great abundance of terpenoid biomarkers including lupane and oleanane showing domination of angiosperms indicate that angiosperm was dominated vegetation source. There also hopanoid biomarkers explaining acidic depositional environment in coal formation and microbes-affected conditions in peat formation process. Ratio of Tm/Ts shows paleomire where ratios value of Tm/Ts is in range of oxide condition.

  • Paleoenvironment, Lignite, Sajau, Berau Basin, Biomarker
  • References
  • [1]
    Daly, M.A., et al. (1989) Cenozoic Plate Tectonics and Basin Evolution in Indonesia. Marine and Petroleum Geology, 8, 1-21.
    Hall, R. (1996) Reconstructing Cenozoic S.E. Asia. In: Hall, R. and Blundell, D., Eds., Tectonic Evolution of Southeast Asia, Geological Society Special Publication No. 106, 153-184.
    Achmad, Z. and Samuel, L. (1984) Stratigraphy and Depositional Cycles in the N.E. Kalimantan Basin. Proceedings Indonesian Petroleum Association, 13th Annual Convention, Jakarta, Vol. 1, 109-120.
    Philp, R.P. (1985) Fossil Fuel Biomarkers: Application and Spectra. Elsevier Science and Publishing Company, New York, 294 p.
    Peters, K.E. and dan Moldowan, M.J. (1993) The Biomarker Guide: Interpreting Molecular Fossils in Petroleum and Ancient Sediments. Prentice Hall, New Jersey, 363 p.
    Hamilton, D.S. and Tadros, N.Z. (1994) Utility of Coal Seams as Genetic Stratigraphic Sequence Boundaries in Nonmarine Basins—An Example from the Gunnedah Basin, Australia. American Association of Petroleum Geologists Bulletin, 78, 267-286.
    Connan, J. and Cassou, A.M. (1980) Properties of Gases and Petroleum Lipids Derived from Terrestrial Kerogen at Various Maturation Levels. Geochimica et Cosmochimica Acta, 44, 1-23.
    Huang, W.Y. and Meinschein, W.G. (1979) Sterols as Ecological Indicators. In: Satyana, A.H., Ed., Petroleum Geochemistry, Pre-Convention Short Course IAGI, Bandung.

Engineering Information Institute is the member of/source content provider to