Implication to 13C, 18O, and clumped 13C18O isotope composition in DIC and calcite
作者: Wolfgang Dreybrodt
作者单位: 1University of Bremen Karst Research Institute
刊名: Acta Carsologica, 2019, Vol.48 (1)
来源数据库: ZRC SAZU, Založba ZRC
DOI: 10.3986/ac.v48i1.7208
原始语种摘要: Outgassing of CO2 from thin water layers of a solution of CaCO3 in an H2O -CO2 system plays a crucial role in the precipitation of calcite. Understanding the process of outgassing of CO2 during precipitation of calcite to the surface of stalagmites is important for the interpretation of isotope signals in the calcite deposited to the speleothem. There is, however, some confusion in the literature about the physics and chemistry of this process. Indistinct terms like forced, enhanced, rapid, intense, slow, increased, equilibrium and progressive outgassing are used widely in the literature to explain the impact on isotope composition of the calcite deposited. It is shown that in all the variety of conditions occurring in nature only two distinct processes of outgassing exist. 1. Diffusion...
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  • calcite 方解石
  • solution 溶液
  • outgassing 脱气
  • clumped 成群的
  • thermometer 温度表
  • isotope 同位素
  • precipitation 沉淀
  • proving 检验
  • chemical 化学的
  • first 第一