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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2010  >  32(1): 64-66
Wang Guangli, Li Shu. DINOFLAGELLATES AS POTENTIAL PRECURSORS OF 24-NORCHOLESTANES[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2010, 32(1): 64-66. doi: 10.11781/sysydz201001064
Citation: Wang Guangli, Li Shu. DINOFLAGELLATES AS POTENTIAL PRECURSORS OF 24-NORCHOLESTANES[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2010, 32(1): 64-66. doi: 10.11781/sysydz201001064
shu

DINOFLAGELLATES AS POTENTIAL PRECURSORS OF 24-NORCHOLESTANES

doi: 10.11781/sysydz201001064
  • 1.

    State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China

  • 2. School of Natural Resources and Information Technology, China University of Petroleum, Beijing 102249, China

  • 3. Research Institute of Petroleum Exploration and Production, SINOPEC, Beijing 100083, China

  • Received Date: 2009-02-25
  • Rev Recd Date: 2009-12-08
  • Publish Date: 2010-02-28
    Abstract
  • Occurring widely in oils and ancient sediments,24-norcholestanes are useful to oil-source correlation and petroleum age evaluation.24-norcholestanes mainly derive from diatoms;however,they are also identified unambiguously from dinoflagellates.Abundant 24-norcholestanes occur in oils and source rocks of the Shahejie Formation,but no diatom fossils have been distinguished from the Shahejie Formation.Thus,other potential precursors might be responsible for these 24-norcholestanes.A correlative relationship between 24-norcholestanes and dinocysts or triaromatic dinosteroids has been observed,revealing that dinoflagellates should be potential precursors of 24-norcholestanes.It seems that 24-norcholestanes come from dinoflagellates and diatoms,respectively,for different basins.Notwithstanding the fact that 24-norsterols have low concentrations in contemporary dinoflagella test,it is concluded that dinoflagellates are key contributors to 24-norcholestanes within subtropical lacustrine sediments of the Eocene-Oligocene Jiyang Depression.

     

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