Título del libro: Water-Rock Interaction - Proceedings Of The 13th International Conference On Water-Rock Interaction, Wri-13
Título del capítulo: Statistical methodology to predict reaction time of water-rock experiments under quasi-steady state conditions
DANIEL PEREZ ZARATE; IGNACIO SALVADOR TORRES ALVARADO; EDGAR ROLANDO SANTOYO GUTIERREZ;
Autores externos:
Idioma:
Inglés
Año de publicación:
2010
Palabras clave:
Cation exchange reactions; Dissolution rates; Experimental data; Fluid composition; Geothermometers; Laboratory experiments; Mineral dissolution; Physico-chemical factors; Quasi-steady state; Regression model; Steady-state condition; Water rock interactions; Water rocks; Dissolution; Experiments; Regression analysis; Rocks; Minerals
Resumen:
Water-rock interaction experiments have provided important results in mineral dissolution studies although the steady state conditions are rarely attained. Several physicochemical factors affect the dissolution rates of minerals in laboratory experiments. Among these factors, the reaction time plays an important role when designing costly and efficient water-rock experiments. We propose a statistical methodology to predict the reaction time needed to approach a quasi-steady state in water-rock experiments. The method was successfully applied for the cation exchange reaction in feldspars using experimental data already published (granite-water interaction at 200°C, 50 MPa, fluid/rock ratio = 2). Logarithmic regression models were used for fitting fluid composition [log(Na/K)] and reaction time (t). For the most probable fluid composition under unknown steady-state conditions, the log(Na/K) value inferred from Na/K geothermometers was assumed. We found that a reaction time between 3520 and 4996 hours would be required to approach the quasi-steady state in the example experiment. © 2010 Taylor & Francis Group, London.
Entidades citadas de la UNAM:
ISBN:
9780415604260
Editorial:
Tipo de producto:
Conference Paper
