APPLICATIONS OF CROSS STRATIFICATION STUDIES TO PROBLEMS OF URANIUM EXPLORATION

摘要

Ancient stream directions in the lower Morrison formation of the Chuska Mountains were reconstructed through use of cross-stratification mapping techniques. Dip directions of the cross-strata, when combined in the forms of histograms and vector resultants, allowed projection, in the direction of paleostream flow, of uranium ore bodies and bleached zones which surround them. It is the authors opinion that the ore bodies are elongated in the direction of ancient current flow. A plotting of the sedimentation structures defined intersections of ancient stream systems, and these localities appeared to be favorable loci for the deposition of uranium ore. A possible relation between type of stratification and location of uranium ore bodies is described.