Ronan

Mine, Undetermined

Commodities and mineralogy

Main commodities Ag; Au; Pb; Zn
Other commodities W
Ore minerals galena; pyrite; sphalerite; tetrahedrite; scheelite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale BC
Quadrangle map, 1:63,360-scale A-1
Latitude 56.003
Longitude -130.048
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Ronan mine is in Section 2 at an elevation of about 2800 feet on the rounded ridge about 0.1 mile west of Skookum Creek, and 0.8 mile east of the Riverside mine (adit) (Maas, 1995, p. 255 and fig. 66). The location is accurate within about 0.1 mile.

Geologic setting

Geologic description

The country rocks in the area of the Ronan mine are pelitic metasedimentary and subordinate andesitic metavolcanic strata of the Jurassic or older Mesozoic Hazelton Group; the Triassic Texas Creek Granodiorite, which underlies and locally intrudes the Hazelton; and the Eocene Hyder Quartz Monzonite, which intrudes the Hazelton and Texas Creek rocks (Smith, 1977; Koch, 1996).
Maas and others (1995, p. 254-257) describe the deposit as a well-defined shear or fracture zone in Texas Creek Granodiorite. The zone strikes northwest and dips steeply northeast, and contains sulfide shoots in quartz or quartz(-granodiorite?)-breccia veins. The principal sulfides are pyrite, galena, sphalerite and tetrahedrite; some of the veins contain scheelite. Samples collected by the U. S. Bureau of Mines in 1992 or 1993 from about 450 feet of the approximately 2-foot-thick main Ronan vein averaged 5.8 ppm Au, 296 ppm Ag, 0.3 percent Cu, 1.6 percent Pb, and 0.35 percent Zn (Maas and others, 1995, p. 257).
Lead-isotope studies of galena from the Ronan mine (Maas and others, 1995, p. 254) indicate that the deposit is Eocene in age, contemporaneous with the emplacement of the Hyder Quartz Monzonite.
Geologic map unit (-130.049704264065, 56.0027051442134)
Mineral deposit model Polymetallic veins (Cox and Singer, 1986; model 22c).
Mineral deposit model number 22c
Age of mineralization Lead-isotope studies of galena from the Ronan mine (Maas and others, 1995, p. 254) indicate that the deposit is Eocene in age, contemporaneous with the emplacement of the Hyder Quartz Monzonite.

Production and reserves

Workings or exploration
The Ronan mine was explored by pits and trenches, and developed by about 700 feet of underground workings (Maas and others, 1995, p. 255).
Samples collected by the U.S. Bureau of Mines in 1992 or 1993 from about 450 feet of the approximately 2-foot-thick main Ronan vein averaged 5.8 ppm Au, 296 ppm Ag, 0.3 percent Cu, 1.6 percent Pb, and 0.35 percent Zn (Maas and others, 1995, p. 257).
Indication of production Yes; small
Production notes An unknown, but probably small, amount of gold reportedly was produced from the Ronan deposit (Maas and others, 1995, p. 260).

Additional comments

The Ronan vein may continue to the northwest and join the Monarch vein (BC079).

References