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Modeling low-temperature geochemical processes:

June 19, 2014

This chapter provides an overview of geochemical modeling that applies to water–rock interactions under ambient conditions of temperature and pressure. Topics include modeling definitions, historical background, issues of activity coefficients, popular codes and databases, examples of modeling common types of water–rock interactions, and issues of model reliability. Examples include speciation, microbial redox kinetics and ferrous iron oxidation, calcite dissolution, pyrite oxidation, combined pyrite and calcite dissolution, dedolomitization, seawater–carbonate groundwater mixing, reactive-transport modeling in streams, modeling catchments, and evaporation of seawater. The chapter emphasizes limitations to geochemical modeling: that a proper understanding and ability to communicate model results well are as important as completing a set of useful modeling computations and that greater sophistication in model and code development is not necessarily an advancement. If the goal is to understand how a particular geochemical system behaves, it is better to collect more field data than rely on computer codes.

Publication Year 2014
Title Modeling low-temperature geochemical processes:
DOI 10.1016/B978-0-08-095975-7.00502-7
Authors D. Kirk Nordstrom, Kate M. Campbell
Publication Type Book Chapter
Publication Subtype Book Chapter
Index ID 70189943
Record Source USGS Publications Warehouse
USGS Organization Toxic Substances Hydrology Program; National Research Program - Central Branch