Mineral resource potential of the Eagle Mountains Wilderness Study Area (CDCA-334), Riverside County, California. Summary report
Geologic, geochemical, and geophysical investigations and a survey of mines and prospects indicate that those parts of the Eagle Mountains Wilderness Study Area (chiefly in the northwest half) that are intruded by propylitically altered mafic dikes or intermediate, hornblende porphyry dikes with spatially associated quartz veins and shear zones have moderate or high potential for the presence of undiscovered low- to medium-grade gold, silver, and tungsten resources. High stream-sediment concentrations of molybdenum suggest that parts of those areas intruded by the dikes also contain molybdenum-bearing minerals and thus have moderate or high potential for the presence of undiscovered molybdenum resources. However, there has been no recorded production of molybdenum in the region and any resources that may be present in the study area are likely to be significant only if the mineralized quartz veins and shear zones are manifestations of an extensive subsurface quartz-vein stockwork system. All areas with moderate or high potential for gold, silver, tungsten, or molybdenum resources also have low potential for the presence of undiscovered copper and lead resources. Low potential for the presence of undiscovered tin and thorium resources exists throughout the wilderness study area. Sand, gravel, and stone suitable for construction materials are found in the study area, but similar or better quality materials are abundant and accessible outside the area. No new mineral occurrence was located during this study. 30 refs., 5 figs.
- Research Organization:
- Geological Survey, Reston, VA (USA); Bureau of Mines, Washington, DC (USA)
- OSTI ID:
- 5563549
- Report Number(s):
- USGS-OFR-84-631; ON: TI85901809
- Country of Publication:
- United States
- Language:
- English
Similar Records
Mineral resources of the Ragged Top Wilderness Study Area, Pima County, Arizona
Mineral resources of the Baboquivari Peak and Coyote Mountains wilderness study areas, Pima County, Arizona