By Kendrick, Mark A.. Lancaster, PA Society of Economic Geologists 2002 . pp. 453-469

Place Hold on Hydrothermal fluid origins in Mississippi Valley-type ore districts: combined noble gas (He, Ar, Kr) and halogen (Cl, Br, I) analysis of fluid inclusions from the Illinois-Kentucky fluorspar district, Viburnum Trend, and tri-state districts, midconti