A small spring fed stream precipitates calcite by outgassing of CO<sub>2</sub> due to chemically controlled inorganic processes. The chemical composition of the water was measured along 9 stations downstre...A small spring fed stream precipitates calcite by outgassing of CO<sub>2</sub> due to chemically controlled inorganic processes. The chemical composition of the water was measured along 9 stations downstream with respect to Ca<sup>2+</sup>, Mg<sup>2+</sup>, Na<sup>+</sup>,K<sup>+</sup>, Cl<sup>-</sup>, carbonate alkalinlty, and SO<sub>4</sub><sup>2-</sup>. Temperature and pH were measured in situ. Small rectangular shaped tablets of limestone from the area were immersed into the stream for short periods and water analyses were carried out at the same time. From weight increase of the tablets, precipitation rates展开更多
In order to study the origin of the local tufa deposits hydrochemical and hydrodynamic investigations have been carried out at a mainly spring-fed stream during two field campaigns, Preliminary results, supported by ...In order to study the origin of the local tufa deposits hydrochemical and hydrodynamic investigations have been carried out at a mainly spring-fed stream during two field campaigns, Preliminary results, supported by δ13C data. suggest that calcite precipitation is entirely controlled by inorganic processes. The evolution of hydrochemistry with respect to major ions was measured at diffe-展开更多
INTRODUCTION Dissolution and precipitation of carbonates plays an important role in nature, such as in the chemistry of seawater, the sedimentation of carbonate at the seafloor, the geochemical evolution of freshwater...INTRODUCTION Dissolution and precipitation of carbonates plays an important role in nature, such as in the chemistry of seawater, the sedimentation of carbonate at the seafloor, the geochemical evolution of freshwater aquifers and last but not least, most spectacular, the evolution of karst landscapes. To provide a deeper understanding to all these processes knowledge is required展开更多
文摘A small spring fed stream precipitates calcite by outgassing of CO<sub>2</sub> due to chemically controlled inorganic processes. The chemical composition of the water was measured along 9 stations downstream with respect to Ca<sup>2+</sup>, Mg<sup>2+</sup>, Na<sup>+</sup>,K<sup>+</sup>, Cl<sup>-</sup>, carbonate alkalinlty, and SO<sub>4</sub><sup>2-</sup>. Temperature and pH were measured in situ. Small rectangular shaped tablets of limestone from the area were immersed into the stream for short periods and water analyses were carried out at the same time. From weight increase of the tablets, precipitation rates
文摘In order to study the origin of the local tufa deposits hydrochemical and hydrodynamic investigations have been carried out at a mainly spring-fed stream during two field campaigns, Preliminary results, supported by δ13C data. suggest that calcite precipitation is entirely controlled by inorganic processes. The evolution of hydrochemistry with respect to major ions was measured at diffe-
文摘INTRODUCTION Dissolution and precipitation of carbonates plays an important role in nature, such as in the chemistry of seawater, the sedimentation of carbonate at the seafloor, the geochemical evolution of freshwater aquifers and last but not least, most spectacular, the evolution of karst landscapes. To provide a deeper understanding to all these processes knowledge is required
