Greenwood Mining Camp Overview
The Phoenix claim group consist of five recently acquired claims located in the prolific Greenwood mining camp of southern British Columbia. This area has a rich history of mining and is considered to be one of the most concentrated mineralized areas of the province.
The Republic Graben & Kinross Gold
In geology, a graben is a depressed block of the Earth’s crust bordered by parallel faults.
The Republic Graben, named after the town of Republic, Washington, is an important major structural feature in both Washington and British Columbia that contains important base and precious metal deposits.
Kinross Gold, the 5th largest gold producer in the world is a prominent gold producer in the Washington state portion of the Republic Graben and the parallel Toroda Graben to the west.
Their last producing gold mine is the Buckhorn mine which produced 1.5Moz gold at a grade of 11.3 g/t gold. Ore from the mine was shipped to their 2,000 tpd Republic mill in Republic Washington 50kms to the east. With the closing of the depleted Buckhorn mine in 2018 the Republic mill is on care and maintenance.
In order to avoid a potentially very costly reclamation charge if the mill was to be dismantled Kinross Gold optioned significant land holdings north of the B.C. border looking for a replacement gold deposit that will supply further feed for their Republic mill.
The Greenwood Mining Camp
Lode mineralization was first recorded near Greenwood in 1884 and major deposits of copper and gold have been mined here since the turn of the century (Brock, 1903). Most of the mineral production from the Greenwood mining camp is from copper-bearing skarn deposits and, to a lesser extent, polymetallic quartz veins and, less commonly, copper-gold porphyry deposits. A more detailed breakdown of the area shows 12 vein-type producers related to granodiorite stocks, 4 vein producers in fault zones, 6 in skarns, 2 mineralized listwanites, 1 magmatic orebody and 1 porphyry copper deposit. Production to date from the 26 principal mines in the area stands at 32,044,173 tonnes of ore consisting of 38,278 kilograms (1,350,216 oz) gold, 183,102 kilograms (6,458,732 oz) of silver and 270,945 tonnes (606,916,800 lbs) of copper.
Most of the ore produced from these mines in the early 1900’s was shipped to the Granby Smelter in Grand Forks, B.C., the 2nd largest smelter in the world.
Focus of Exploration
The combination of igneous intrusion, limestone and mineralization is repeated frequently throughout the camp, and there is little question that intrusion of the Jurassic and Cretaceous granitic plutons provided not only the thermal engine driving the circulation of mineralizing solutions to produce pyrometasomatic and porphyry-type deposits but these intrusions also provided the structural setting for the development of many vein fissures. A linear lead isotope relationship that connects diverse deposit-types in the area appears to be the result of fluid mixing within a well connected hydrothermal plumbing system.
The Phoenix ore body is locallized by faulting, the footwall argillite and impurity of the overlying limestone. It is assumed that a deep seated granitic body under the mine area produced the mineralizing solutions which were then channelled by faults to favourable facies sites in the Brooklyn limestone for replacement and deposition.
Current exploration is focused on some of the oldest and youngest assemblages in the Greenwood area. Units of the Slide Mountain terrane, such as the Paleozoic Knob Hill and Attwood groups, hold promise for the discovery of stratiform polymetallic VMS-type deposits. Tertiary metallization includes epithermal Au-Ag veins, sulphur-poor silica sinter deposits and Carlin-type deposits with bulk tonnage potential.