Ibex

Prospect, Inactive

Commodities and mineralogy

Main commodities Ag; Pb; Zn
Ore minerals chalcopyrite; galena; pyrite; sphalerite; tetrahedrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale BC
Quadrangle map, 1:63,360-scale A-1
Latitude 56.076
Longitude -130.181
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Ibex prospect is in Section 12 at an elevation of about 3700 feet on the west wall of the valley of upper Ibex Creek (Elliott and Koch, 1981, p. 14, loc. 49).

Geologic setting

Geologic description

The country rocks in the area of the Ibex prospect are Triassic Texas Creek Granodiorite, which underlies and locally intrudes pelitic metasedimentary and subordinate andesitic metavolcanic strata of the Jurassic or older Mesozoic Hazelton Group; and the Eocene Hyder Quartz Monzonite, which intrudes the Hazelton and Texas Creek rocks (Smith, 1977; Koch, 1996).
The deposit consists of quartz fissure veins in granodiorite and overlying argillite and quartzite within 200 feet of the contact between the Texas Creek and its Hazelton roof. Buddington (1925, p. 88-89) describes a pinch-and-swell vein 15 inches to 2 feet thick of quartz and sulfides in argillite and quartzite cut by granite porphyry and granodiorite. The sulfides are mainly interbanded sphalerite and galena; pyrite, chalcopyrite, and tetrahedrite are also present. Assays of picked specimens reportedly showed high values of Ag, Cu, and Pb.
Buddington (1926, p. 53-54) also describes a second lode, discovered in 1924. It is 5 inches to 3 feet thick and was traced in outcrop for several hundred feet. This lode consists of galena- and pyrite-bearing quartz stringers in a fissure zone in granodiorite.
Lead-isotope studies of galena from the Ibex prospect (Maas and others, 1995, p. 229-248) indicate that the deposit is Eocene in age, contemporaneous with emplacement of the Hyder Quartz Monzonite.
Geologic map unit (-130.182705329658, 56.0756953864964)
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 Ibex prospect (Maas and others, 1995, p. 229-248) indicate that the deposit is Eocene in age, contemporaneous with emplacement of the Hyder Quartz Monzonite.
Alteration of deposit The quartzite hostrock may reflect silicification of pelitic country rock.

Production and reserves

Workings or exploration A crosscut driven 131 feet to undercut the vein described by Buddington in 1925 did not find the vein and was abandoned (Buddington, 1926, p. 53-54).
Indication of production None

Additional comments

The Ibex prospect was originally staked in 1923.

References