Mount Baldy mining district

Region West, Southwest
Mineral systems
Deposit types
Critical minerals
Other minerals

Information leading to the delineation of this focus area

Basis for focus area Precambrian igneous and metamorphic rock complex from the California state geologic map (unit pCc) that covers the Cattle Canyon and Andrew tungsten mine area.
Identified resources Identified resources and historical production of tungsten.
Production Placers were mined in the late 1800s and early 1900s; production exceeded 2,500 lbs (1,134 kg) scheelite concentrate averaging 38.29% W03.
Status Past placer mining.
Estimated resources Tungsten placer deposits (scheelite-bearing alluvium) extend about 3 mi (5 km) through a relief of more than 2,600 ft (800 m) along Cattle Canyon. U.S. Bureau of Mines identified submarginal resources estimated to contain 20 million yd3 (15 million m3) of alluvium.
Geologic maps Dibblee and Minch (2002), scale 1:24,000; Evans and others (1982), scale 1:48,000.
Geophysical data Magnetic high (523 on Plate 11) over part of the focus area correlated with a quartz diorite and gneissic rock complex (Evans and others, 1982).
Favorable rocks and structures Scheelite in alluvium and talus mined along Cattle Canyon.
Deposits Cattle Canyon placers.
Evidence from mineral occurrences MRDS; USMIN; Evans and others (1982).
Geochemical evidence Geochemical analyses done as part of a wilderness study (Evans and others, 1982).
Geophysical evidence Unknown.
Evidence from other sources Unknown.
Comments Focus area mainly included for historical purposes. Part of the San Gabriel Mountains National Monument (GAP status code 3 - subject to extractive use). Relatively inaccessible rugged area of high relief, fire-prone area.
Cover thickness and description Exposed.
Authors Jane M. Hammarstrom.
New data needs None requested at this time.
Geologic mapping and modeling needs None requested at this time.
Geophysical survey and modeling needs None requested at this time.
Digital elevation data needs Lidar complete.