Abstract: Role of Electrochemical Cells in Formation of Paleosurface-Related Vein-Type Uranium Deposits

James A. Tilsley

A significant part of the world's known uranium reserve is found in relatively high-grade concentrations of black uranium oxides spatially related to mature Precambrian erosional surfaces younger than 2,200 m.y.

The genesis of this type of mineral deposit is a matter of controversy. Our analysis of the problem suggests that the metal is released from rocks undergoing weathering, is transported in surface and shallow groundwater, and is concentrated under reducing conditions still largely within and immediately adjacent to the zone of weathering.

The dominant concentration mechanism is indicated to be electrochemical activity centered on electrically conductive structures extending below the weathering surface.

Electrochemical and depositional models have been developed and applied to exploration for paleosurface-related vein deposits beneath substantial thickness of sterile cover rocks.

AAPG Search and Discovery Article #90961©1978 AAPG Annual Convention and Exhibition, Oklahoma City, Oklahoma