Paradise Peak

Region West, Southwest
Mineral systems
Deposit types
Other minerals

Information leading to the delineation of this focus area

Basis for focus area High sulfidation Au-Ag deposits with large areas of locally alunite-rich advanced argillic alteration; area of stockwork quartz-sericite-pyrite veins is part of an inferred gold-rich porphyry system (Sillitoe and Lorson, 1994); much of mined ore contained high Sn contents (John and others, 1991); 1 km buffer around mapped alteration and ASTER phyllic and argillic alteration (Mars, 2013).
Identified resources Historical production of gold, mercury, and silver.
Production Between 1986-1994, 24.3 million t of ore, 1.626 million oz Au, 23.99 million oz Ag, as well as significant Hg from high sulfidation gold-silver deposits.
Status Past mining.
Estimated resources Reserves in 1996 remaining at the Ketchup Flats deposit were 5 million tons of ore grading 0.022 opt Au and 0.2 opt Ag.
Geologic maps John and Kelleher (1987), scale 1:24,000; John (1988), scale 1:24,000; Sillitoe and Lorson (1994), scale ~1:40,000.
Geophysical data Inadequate aeromagnetic and aeroradiometric coverage. ASTER remote sensing by Mars (2013).
Favorable rocks and structures Early Miocene intermediate dome field emplaced into late Oligocene-early Miocene silicic tuffs and intermediate lava flows.
Deposits Paradise Peak (includes Paradise Peak, Ketchup Flats, Ketchup Hill, Ketchup Knob, and County Line) (MRDS dep_id: 10310352 ), Nody prospect (MRDS dep_id; 10098380-a small Hg deposit overlying Paradise Peak).
Evidence from mineral occurrences MRDS; John and others (1991); Sillitoe and Lorson (1994).
Geochemical evidence John and others (1991); Sillitoe and Lorson (1994); Ga enrichment in alunitic alteration in Rytuba and others (2003).
Geophysical evidence Remote sensing data in Rockwell and Hofstra (2008) and Mars (2013).
Evidence from other sources None.
Comments Alunitic and silicic alteration and precious metal mineralization appear to be controlled by throughgoing northwest-trending high-angle fractures and faults, which are perhaps related to pre-Basin and Range extension. See Cheong and others (2000).
Cover thickness and description Surface exposure.
Authors David A. John.
New data needs Geologic mapping, geophysics.
Geologic mapping and modeling needs Updated geologic mapping.
Geophysical survey and modeling needs High-resolution, Rank 1 aeromagnetic and aeroradiometric surveys.
Digital elevation data needs Lidar in progress (GeoDAWN).