Harrison Lake Properties

Harrison Lake (Doctors Point)


The Harrison Lake property is located in southwestern BC. The Property is located about 90 km northeast of Vancouver, BC along the western side of Harrison Lake. The property consists of one mineral claims of approximately 42 ha. Access to the property is by the Harrison West forest service road which passes directly through the property.


The area is underlain by Oligocene to Miocene Zoned granodiorite, diorite, tonalite, quartz monzonite, alaskite; probably the plutonic roots to the Coquihalla Formation (OMCv); includes Chilliwack Batholith granodioritic intrusive rocks. These intrude the Lower Cretaceous Gambier Group marine sedimentary and volcanic rocks.

The deposit type is epithermal veining related to local diorite plutons. Hornfelsed alteration aureoles around the diorite are mineralized with pyrite and pyrrhotite, but do not contain any precious metal values. The locus of gold-silver-arsenic mineralization are cone-fractures in the contact. Veins range from several cm’s to 0.75 metres wide although veins up to 3 metres have been drilled. Pyrite and arsenopyrite are the most common suphides with rare chalcopyrite, molybdenum and galena.


Main Mineralized Zone (Doctor’s Point)

Drilling has been undertaken on various prospects on the Property including the Main Mineralized Zone between 1981 to 1984. An historical drill-indicated reserve based on closely spaced grid drilling is reported as 113,600 tonnes grading 2.16 g/t gold and 6.2 g/t silver and occur near surface in a triangular mass at the Main Mineralized Zone (BC Assessment Report 18365). This resource is historical and has not been verified by a Qualified Person and is reported for purely historical context.

The interbedded volcanics and sediments underlying this zone appear to be intruded by at least two phases of diorite, including dikes and sills. The zone is controlled in the northeast and southwest by faults trending 330 degrees, which appear to serve as a locus for veining. The majority of the veins at the Main zone strike between 300 and 330 degrees. A later fault system, striking between 360 and 020 degrees, has produced a small offset in the veins.

The South Swamp–Pylon zone is situated 850 metres north-northwest of the Main zone, between the Main and North zones. It is underlain by volcanic and volcaniclastic rocks. The southern half of the zone is intruded by the Doctors Point pluton and the major fault trending south from the North zone truncates its eastern boundary. Stockwork-style, less than 1-centimetre-wide quartz-sulphide veins assaying up to 100 g/t gold are hosted by the diorite (BC Assessment Report 18365).

Figure 1: Cross section of Main Mineralized Zone (Doctors Point) from Lennan, 2006 (BC Assessment Report 28666)

Fire Creek


The Fire Creek property is located 83 km northeast of Vancouver, north of the head of Harrison Lake. along of Fire Creek, 1.5 kilometres west-northwest of its confluence with the Lillooet River. It s located in the New Westminster Mining Division and consists of one 83.4 hectare mineral claim.


The Fire Creek showing is located near the contact of the Cretaceous to Tertiary Stollicum Schist and the Fire Lake Group which is correlated to the Lower Cretaceous Gambier Group (marine sediments). A zone of strong sericitic alteration, chalcedonic silicification and heavy pyritization is developed in interbedded andesitic tuff, feldspar crystal tuff and sericite-chlorite schist. Information based on drilling indicates that the alteration zone strikes northwest for 200 metres and dips steeply northeast to depths of greater than 120 metres. True thicknesses vary from 20 to 40 metres.

Mineralization consists of 20 to 40% disseminated and stringer sulphides, with veins up to 20cm in width. Sulphides consist mainly of pyrite and pyrrhotite, minor chalcopyrite, sphalerite and arsenopyrite, and trace bornite, acanthite, pyrargyrite and native copper. Less altered lithologies around the periphery of the zone contain up to 15% in disseminated and bedded sulphides, which mainly comprise pyrite, pyrrhotite and minor chalcopyrite. The alteration zone is cored by a hydrothermal breccia exhibiting intense argillic-potassic clay alteration, containing 20 to 40% disseminated and stringer pyrite. Quartz veins, up to 50cm in width and containing less than 5% sulphides, are found throughout the alteration zone. A chip sample taken across 2 metres contained 10 g/t gold. (BC Minfile 092GNE032).


Work through the 1980’s returned consisted of surface rock and soil sampling, geophysical surveys and diamond drilling. Diamond drilling met with some success with zones grading 1.05 g/t Au, 3.4 g/t Ag over 6.0 metres, 2.54 g/t Au and 8.3 g/t Ag over 1.5 m, and 1.58 g/t Au, 122.5 g/t Ag, 0.71% Cu and 0.14% Zn. Limited work has been completed since 1987.

During 2017, chip sampling in the area of the 1987 drilling returned anomalous precious and base metal concentrations of 0.91 ppm Au, 2.1 ppm Ag, and 3810 ppm Cu over 0.60 metres. Soil sampling from the same program returned 6 of 21 gold-in-soil concentrations >100 ppb, with a maximum of 605 ppb.

A number of different styles of mineralization have been recognized in the Fire Lake Group, including volcanic-exhalative mineralization, stockworks and skarns related to granodiorite, and mesothermal Au-Cu veins associated with high-angle thrust faults. The Fire Lake Group has been correlated to the Gambier Group, which contains the Britannia volcanogenic massive sulphide orebody. This Kuroko-style deposit contains bedded and brecciated gypsum, similar to pyritic gypsum found in the Brokenback Hill Formation, and suggests the possibility of similar submarine hydrothermal mineralization in the Fire Lake Group.