New Mexico Geological Society Annual Spring Meeting — Abstracts

This study investigates the hydrogeochemical properties of the Entrada, Wanakah, Morrison, and Dakota Sandstone Formations within the San Juan Basin. Due to limited water quality data within the Navajo Nation, a comprehensive assessment is necessary. This research aims to characterize these formations by analyzing general water chemistry, major and minor ions, organic and inorganic compounds, and arsenic speciation. We hope the findings describe changes in water chemistry and provide insights into hydrological modeling, particularly regarding carbon dioxide injection into the Entrada Formation. The potential for upward migration resulting in pH variations, mineral dissolution, and heavy metal mobilization may impact water quality. Understanding these processes will aid in developing best practices for carbon sequestration projects and informing mitigation strategies. Ultimately, we hope this study contributes to the sustainable management of regional water resources and highlights potential risks associated with subsurface carbon storage.