Geochemical evidence for fluid-rock interaction in the Ordovician Vinini Formation at Vinini Creek, Eureka County, Nevada

Understanding the geochemistry of the Vinini Formation is significant for two reasons: (1) because it is the first background geochemical study of the Vinini Formation at Vinini Creek that includes precise biostratigraphic controls provided by other workers (Finney et al., 1997). Faunal control allows us to pinpoint our exact location in the Vinini Formation, and (2) because determining the nature and extent of fluid alteration enables investigators to further refine models of fluid flow within Nevada's Great Basin. This is relevant to petroleum and mineral exploration. Petroleum prospecting involves fluid flow because of hydrocarbon maturation and migration. Mineral exploration would also benefit from improved fluid flow models, especially when prospecting for Carlin-type deposits (i.e., sedimentary rock hosted hydrothermal precious metal deposits).