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The Morey (NV-060-19D and Fandango (NV-060190) Wilderness Study Areas are located in the northern Hot Creek Range about 25 mi north of Warm Springs, Nev. At the request of the Bureau of Land Management, 46,300 acres of the Morey and Fandango Wilderness Study Areas were studied. In this report, the area studied is referred to as "the wilderness study area," or simply "the study area." Geologic, geochemical, geophysical, and mineral surveys were conducted by the USGS and the USBM in 1984 to appraise the identified mineral resources and to assess the mineral resource potential of the study areas. These studies indicate that there are small identified resources of zinc, lead, and silver at the Lead Pipe property in the Fandango Wilderness Study Area, several areas of high potential for the occurrence of gold resources in the Fandango study area, small areas of low and moderate potential for the occurrence of silver, lead, and zinc resources in the Fandango study area, areas of moderate and high potential for the occurrence of silver, lead, and zinc resources in the Morey study area, and an area of low potential for copper, molybdenum, and tin in the Morey study area. Both study areas have low resource potential for petroleum, natural gas, uranium, and geothermal energy. Character and Setting The Morey and Fandango Wilderness Study Areas are located in the northern Hot Creek Range in northcentral Nye County, Nev. (fig. 1). The study areas are contiguous in South Sixmile Canyon. The geology of the study areas is a complex mixture of Paleozoic (570 to about 240 Ma; that is 570 to about 240 million years before present), lower Mesozoic (about 240 to 170 Ma), and Cenozoic (about 35 Ma to present) (see Geologic Time Chart, last page of report) rocks and structures typical of the Basin and Range province. The Hot Creek Range is a northto northeast-trending faultbounded range that has deep alluvia ted valleys on both sides. The Morey study area and the southern part of the Fandango study area are covered by middle Tertiary silicic volcanic rocks that are mainly ash-flow tuff (fig. 2). The northern part of the Fandango Wilderness Study Area is underlain by Paleozoic and Mesozoic sedimentary rocks. Most of the sedimentary rocks are carbonate rocks, with minor quartzite, calcareous shale, siliceous shale, and siltstone. Several ages and types of faults are present in the study areas, including Mesozoic thrust faults and Cenozoic high-angle normal faults. The intersections of thrust faults and high-angle normal faults served as important controls on localization of hydrothermal alteration and gold mineralization in the Fandango Wilderness Study Area. Two nested cauldrons, collectively called the Hot Creek Valley caldera

Mineral Resources of the Morey and Fandango Wilderness Study Areas, Nye County, Nevada