URANIUM FAVORABILITY OF TERTIARY SEDIMENTARY ROCKS OF THE WESTERN OKANOGAN HIGHLANDS AND OF THE UPPER COLUMBIA RIVER VALLEY, WASHINGTON

摘要

Tertiary sedimentary rocks in the northern portions of the western Okanogan highlands and in the upper Columbia River valley were investigated during a regional study to determine the favor-ability for potential uranium resources of the Tertiary sedimentary rocks of northeastern Washington. This project involved measurement and sampling of surface sections, collection of samples from isolated outcrops, and chemical and mineralogical analyses of samples.nNo portion of the project area of this report is rated of high or of medium favorability for potential uranium resources. Low favor-ability ratings are given to Oroville, Tonasket, and Pine Creek areas of the Okanogan River valley;to the Republic graben;and to the William Lakes, Colville, and Sheep Creek areas of the upper Columbia River valley.