GEOCHEMICALLY CONTROLLED CALCITE PRECIPITATION BY CO_2-OUTGASSING: FIELD MEASUREMENTS OF PRECIPITATION RATES IN COMPARISON TO THEORETICAL PREDICTIONS

作     者：W.Dreybrodt D.Buhmann J.Michaelis E.Usdowski 

作者机构：University of Bremenlnstitut fur Experimentelle Physik 2800 Bremen GermanyUniversity of Bremenlnstitut fur Experimentelle Physik 2800 Bremen GermanyUniversity of Gottingen Sedimentpetrographisches Institut 3400 Gottingen GermanyUniversity of Gottingen Sedimentpetrographisches Institut 3400 Gottingen Germany 

出 版 物：《中国岩溶》 (Carsologica Sinica)

年 卷 期：1992年第11卷第S1期

页      面：9-24页

学科分类：07[理学] 0705[理学-地理学] 070501[理学-自然地理学] 

主　　题：carbonate limestone downstream chemically dissolution immersed tablets inorganic shaped strata 

摘      要：A small spring fed stream precipitates calcite by outgassing of CO2 due to chemically controlled inorganic processes. The chemical composition of the water was measured along 9 stations downstream with respect to Ca2+, Mg2+, Na+,K+, Cl-, carbonate alkalinlty, and SO42-. 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