Geological Survey Circular 217 Preliminary Report on the White Canyon Area, San Juan County, Utah

Cover

Abstract

Introduction

Location
Previous work
Purpose of work
Field methods

General geology

Carboniferous rocks (Pennsylvanian)
    Hermosa formation
Permian(?) rocks
    Rico formation
Permian rocks
    Cutler formation
        Cedar Mesa sandstone member
        Organ Rock tongue
        White Rim sandstone member
Triassic rocks
    Moenkopi formation
    Shinarump conglomerate
    Chinle formation
Jurassic(?) rocks
    Glen Canyon group
        Wingate sandstone
        Kayenta formation
        Navajo sandstone

Structure

Uranium deposits

Localization of deposits
    Relation of deposits to channel fills
    Relation of deposits to structure
    Relation of deposits to chemical controls
    Summary
Mineralogy of the deposits
Origin of the ores
Grade
Production

Results of work

Ore criteria
    Features observed only in mineralized areas
        Visible uranium minerals
        Sulfide minerals
        Secondary copper minerals
        Alunite
        Hydrocarbons
    Features observed at many deposits but seen in unmineralized areas as well
        Bleaching and alteration in the Moenkopi formation
        Fracturing
        Iron and manganese staining
        Carbonized wood fragments and vegetal material
        Channel filling
        Jarosite(?)
        Facies change within the Shinarump conglomerate
    Features not apparently related to ore deposits

Literature cited

Plate

Figure

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A discussion of the history of prospecting and mining in the Great Falls area and a description of the gold-bearing quartz veins.

UNITED STATES DEPARTMENT OF THE INTERIOR
Oscar L. Chapman, Secretary

GEOLOGICAL SURVEY
W. E. Wrather, Director

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