Mineralogical Model of the Floridan Aquifer in the Southwest Florida Water Management District

摘要

Distribution of geological and hydrochemical parameters in cores and wells penetrating the Floridan aquifer along the west coast of peninsular Florida is related to the occurrence of dolomite. Trace element analyses of the cores indicate correlations between strontium and sodium concentrations and the particular carbonate phase. Chloride, sulfate, and conductivity values indicate the position and extent of the freshwater-saltwater interface. Thick sequences of carbonate rocks in western peninsular Florida have been dolomitized in the freshwater-saltwater mixing zone. A multivariate computer analysis revealed several trends of environment of deposition parameters. Energy levels and faunal diversitites helped to reconstruct the paleoenvironments of these Tertiary carbonate rocks which were coordinated with the stratigraphy of the study area. Understanding these interactions will aid hydrologists to inventory more precisely present-day water supplies and to achieve more efficient water management by integrating the mineralogical model with hydrologic data.