Preliminary report on the correlation between gamma-ray logs and permeability logs of the ore-bearing sandstone in the Morrison Formation Calamity Mesa, Mesa County, Colorado

A study of the hydrologic properties and geologic relations of the
ore-bearing sandstone in the Salt Wash sandstone member of the Morrison
formation has been undertaken because uranium and vanadium are believed
to have been introduced into the sandstone by circulating ground water.
This report describes the geologic and hydrologic characteristics
of the ore-bearing sandstone as determined in the core samples from three
diamond-drill holes on Calamity Mesa, Mesa County, Colo., and correlates
these data with localized gamma-ray activity detected in the three drill
holes. These data are illustrated on figure 1 by the combined geologic,
permeability, porosity, and gamma-ray logs.
This study is part of the program of geologic studies on the
Colorado Plateau conducted by the Geological Survey on behalf of the Atomic
Energy Commission. This preliminary report describing the results of this
study has benefited from the suggestions and criticisms of L. B. Riley of
the Geological Survey.