WSGS Study focuses on Gas Hills uranium mining district; Completion this summer
(Laramie, Wyo.) – The Gas Hills uranium mining district in Fremont and Natrona counties has produced more uranium oxide concentrate (more than 100,000 million pounds) than any other district in Wyoming and is the focus of a new Wyoming State Geological Survey investigation.
Although the area has been extensively explored and mined, considerable uncertainty remains as to the full nature of reductant(s) leading to uranium precipitation. Oxidized, uranium-rich groundwater is thought to have traveled along the more permeable subsurface conduits and precipitated uranium minerals in pore spaces and as grain coatings in reduced environments.
The goal of this study is to examine mineral assemblages in and near some remaining ore zones to learn more about geochemical and mineralogical reactions, which may have contributed to the reducing environments in which uranium was ultimately deposited. Geologist Robert Gregory is conducting the study, which is slated for completion in summer 2018.