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Volume 35 Issue 6
Dec.  2016
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Article Navigation >  CARSOLOGICA SINICA  > 2016  >  35(6): 605-613
ZENG Zhenyu, YAN Hao, SUN Hailong, LIU Zaihua. Theoretical calculation of aquatic photosynthesis contribution ratio and the controlling factors of diurnal vatiations of hydrochemistry and δ13CDIC in the outlets and inlets of travertine pools at Baishuitai, Yunnan, China[J]. CARSOLOGICA SINICA, 2016, 35(6): 605-613. doi: 10.11932/karst20160601
Citation: ZENG Zhenyu, YAN Hao, SUN Hailong, LIU Zaihua. Theoretical calculation of aquatic photosynthesis contribution ratio and the controlling factors of diurnal vatiations of hydrochemistry and δ13CDIC in the outlets and inlets of travertine pools at Baishuitai, Yunnan, China[J]. CARSOLOGICA SINICA, 2016, 35(6): 605-613. doi: 10.11932/karst20160601
shu

Theoretical calculation of aquatic photosynthesis contribution ratio and the controlling factors of diurnal vatiations of hydrochemistry and δ13CDIC in the outlets and inlets of travertine pools at Baishuitai, Yunnan, China

doi: 10.11932/karst20160601
  • 1.

    State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences；University of Chinese Academy of Sciences

  • 2.

    State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences

  • 3.

    Institute of Karst Geology, CAGS/Ministry of Land Resources and Guangxi Key Laboratory of Karst Dynamics；State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences

  • Publish Date: 2016-12-25
    Abstract
  • Travertine is common secondary chemical sediment in karst areas, also one of the continental high-resolution climatic archives. Its formation is often associated with aquatic plants, whose metabolism can likely change hydrochemistry and carbon isotopic composition of dissolved inorganic carbon (DIC), thus affecting the carbon isotopic composition of travertine. However, the influence of micro-environment caused by aquatic plants is usually ignored when reconstructing paleoenvironments using carbon isotopic composition of travertine. A method of combining on-site high-resolution monitoring and in-situ titrating with measurement of samples in laboratory was used in present study to investigate the influence of submerged plant on hydrochemistry and carbon isotopic compositions of pool water. The results show that when pools were fed by low DIC concentration water (S1-3), the δ13CDIC difference between the outlet and inlet of the pool reflects the control of hysteresis effect, while fed by high DIC concentrations water (S1-1), the δ13CDICdifference between the outlet and inlet of the pool indicates the control of degassing effect. Because of the existence of the reservoir effect, the influence of metabolism of submerge plant on δ13CDICis small.

     

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