Fluvial and Marine Depositional Environments Determined From Groundwater Chemistry and Calculated Clay‐Cation Compositions

Abstract

Differentiation of a fluvial from a marine depositional environment is essential to understanding the potential hydrocarbon reservoir and source rock characteristics of a sedimentary unit (e.g., Chen et al., 2015;Posamentier & Walker, 2006). Fluvial reservoirs in particular, with their typical meander-belt characteristics, are much less continuous, less laterally extensive, and more compartmentalized than marine reservoirs with their typical sheetlike characteristics (e.g.,