Aerial radiometric and magnetic survey, Reno national topographic map, Nevada. Volume 1

Technical Report · Sun Jan 01 00:00:00 EST 1978

OSTI ID:6458646

The Reno Map Sheet covers part of western Nevada between latitudes 39/sup 0/ and 40/sup 0/ north and longitudes 118/sup 0/ and 120/sup 0/ west. The area includes parts of Churchill, Mineral, Nye, Douglas, Lyon, Storey and Washoe counties. The area is located within the limits of the Basin and Range Physiographic Province but borders the Sierra Nevada immediately to its west. The eastern half of the Reno Map Sheet is dominated by the Carson Sink. The western half of the map sheet contains a greater number of ranges. The basin areas are less extensive. In the western half of the map sheet Mesozoic aged metamorphic rocks occur as isolated outcrops surrounded by Cenozoic deposits or Cretaceous plutonic rocks. Metamorphism of the volcanic and sedimentary rocks occurred prior to and during the plutonic intrusions. Extensive portions of southern Washoe and Storey counties are covered by Late Pleistocene and Recent alluvial deposits and alluvial fans. In the eastern half of the map sheet the peripheral mountain ranges are underlain by Cenozoic volcanic and sedimentary rocks. Mesozoic rocks of Triassic to Middle Jurassic age occur throughout the mountain ranges. The narrower eastern valleys are underlain by Quaternary alluvial and lacustrine deposits which are approximately contemporaneous with the Pleistocene aged deposits of Lake Lahontan which formerly occupied the Carson Sink. Much of the present day topography of the basins and ranges is a result of intermittent Cenozoic structural deformation which continues to the present. The major uranium ore occurrences are in Storey and Washoe counties and are closely associated with the Cenozoic volcanic or volcano-sedimentary rocks. In the Red Rock Canyon area and in Churchill County uranium concentration is specifically related to lignitic shale or lignite occurrences.

• Research Organization: Geodata International, Inc., Dallas, TX (USA)
• DOE Contract Number: EY-77-C-13-1678
• OSTI ID: 6458646
• Report Number(s): GJBX-117(78)(Vol.1); TRN: 79-003907
• Country of Publication: United States
• Language: English

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