Coal Cliffs

Region West, Southwest
Mineral systems
Deposit types
Other minerals

Information leading to the delineation of this focus area

Basis for focus area Outline of Coal Cliffs district from Krahulec (2018b).
Identified resources None.
Production None.
Status Past exploration.
Estimated resources Unknown.
Geologic maps Hintze (1980), scale 1:500,000.
Geophysical data Inadequate Rank 4 and 5 aeromagnetic coverage; Rank 5 aeroradiometric coverage.
Favorable rocks and structures The deposits are hosted in the basal Ferron Sandstone Member of the Upper Cretaceous Mancos Shale. Seven small, flat lying, beach paleoplacer deposits occur on two parallel northwest-trending belts. The mineralogy is believed to be ilmenite, zircon, magnetite, quartz, and monazite.
Deposits Bradley.
Evidence from mineral occurrences UMOS (Utah Geological Survey, 2021).
Geochemical evidence Three samples from the exposed paleoplacer deposits average 12.6% TiO2, 1.8% ZrO2, 33.4% Fe, and 0.1% ThO2 (Dow and Batty, 1961).
Geophysical evidence None.
Evidence from other sources Krahulec (2018b), Mills and Rupke (2020).
Cover thickness and description Exposed.
Authors Stephanie Mills.
New data needs None requested at this time.
Geologic mapping and modeling needs None requested at this time.
Geophysical survey and modeling needs None requested at this time.
Digital elevation data needs Lidar in progress.