Reviving the Historic Bissett Gold Camp


Ogama-Rockland Property


Ogama-Rockland is located in Manitoba, Canada and lies approximately 165 km northeast of central Winnipeg and about 27 km southeast of the small mining town of Bissett as well as the Company’s Rice Lake milling complex. The former Ogama-Rockland gold deposit was mined by underground development from 2 shafts during the 1948 to 1951 period and produced a total of 45,440 ounces of gold from 126,192 tonnes of ore at a recovered grade of 10.26 g Au/t.

The Ogama-Rockland property is complimentary for the operations at True North, located in close proximity and contains numerous historic drill holes with future potential for high-grade production. This property provides significant optionality for future feed to the mill at True North.

A brief history of the property is as follows:

  • 1927-1932 Development and mining of the Kirchener, Growler, Tene, Rogers and Hope veins by Central Manitoba Gold Mines Limited.
  • 1979 Property acquired by Mid-North Resources Ltd. All subsequent work carried out by interests that had optioned the property.
  • 1981 Soil sampling and compilation of data by Camflo Mines Limited.
  • 1984 Arbor Resources L t d . Diamond drilled 4 holes on soil anomalies west of the shaft area. Soils were apparently contaminated by tailings and drilling results were negative.
  • 1987-1988 Exador Resources Inc. carried out extensive airborne and ground geophysical surveys over the area and diamond drilled 20 holes (3,001 m) primarily on targets along the south carbonate shear, and 15 holes (1,830 m) were drilled on the Cryderman block. 55 km of grid lines were cut, and 33 km of IP/Resistivity survey was carried out. A 1,850 km regional airborne Mag-EM survey was also carried out.
  • 1992 Detailed geological mapping, prospecting and lithogeochemical sampling were carried out by Cameco.
  • 1996 Mid-North Resources drilled 187 overburden holes (1,144 m) along a 2 km strike length of the North Carbonate Shear zone.
  • 1998 Mid-North Resources diamond drilled 14 holes (745 m)and overburden drilled 122 holes (727 m) on the North Carbonate Shear zone.
  • 2003-2004 Placer Dome carried out a field mapping program included prospecting, soil sampling, and black spruce top sampling on the Ogama-Rockland-Valley Vein area immediately north of Long Lake, and the Cyrderman showings between Halfway Lake and Wallace Lake. A fixed-wing airborne magnetometer survey was flown concurrently with the summer field program. In 2004, a grid was cut over the Rockland-Ogama-Onondaga shaft area. An offset pole-dipole induced polarization (“IP”) survey was completed by Abitibi Geophysics on behalf of Placer Dome and 3D modeling of the data was completed in-house to generate chargeability anomaly drill targets. A series of chargeability-high anomalies were modeled from the data. Many of the IP anomalies had coincident soil and black spruce top Au anomalies that coincided with numerous sub-parallel shear zones containing widespread hydrothermal alteration.
  • In 2005 Bison Gold Resources acquired the property and carried out surface drilling between 2009 and 2013 with 72 diamond drill holes totaling 27,498 meters.
  • Bison Gold Resources completed a NI 43-101 compliant Technical Report in connection with the property in 2013, relying on historical data to a great extent.
  • Klondex acquired the Bison assets in October 2017.

Deposit Types

Mineralization within the Rice Lake belt is hydrothermal in origin, similar to much of the gold that has been produced from Archean-age volcanic belts around the world. Gold occurs in quartz-carbonate altered shear zones and quartz-carbonate filled veins, in association with pyrite, chalcopyrite and pyrrhotite. The traditional view of the Rice Lake belt is that hydrothermal systems with gold mineralization occur in two main areas of high heat flow in the belt, northwest of the Ross River pluton, near Bissett, and southeast of the pluton on the Rice Lake property. Both of these areas are characterized by abundant feldspar porphyry dikes. Much of the mineralization in the Rice Lake belt, including the Central Manitoba Zone, is closely associated with gabbro sills. The Ogama-Rockland deposit is associated with quartz veins in a brittle-ductile shear zone in granitic rocks near the south-east margin of the Ross River Pluton.

Virtually all the literature regarding gold mineralization in the Rice Lake belt concurs that gold is associated with quartz veins in shear systems (Figure 7), but the presence of gold bearing penetrative shear zones in the Ross River Pluton seems to preclude the pluton as the regional source of mineralization. It is possible that the feldspar porphyry dykes are the surface expression of a deep seated secondary granitic pluton. The greenstones in the belt may have a geochemical pre-disposition for gold precipitation, but structural breaks that create low pressure zones are a prerequisite for gold deposition.

Other deposits of this type include Red Lake/Balmertown, and of course, the nearby former San Antonio mine at Bissett.

The table below and the corresponding notes were obtained from the National Instrument 43-101 – Standards of Disclosure for Mineral Projects ("NI 43-101") technical report for the Property titled "A Technical Review of the Ogama-Rockland Deposit on the Rice Lake Property, Manitoba, Canada for Bison Gold Resources Inc.", dated November 15, 2013, prepared by Andrew M. Chater, Ph.D., P.Geo, Senior Associate Geologist, Jamie Lavigne, M.Sc., P.Geo., Senior Associate Geologist and Clifford J. Duke, P.Eng., Senior Associate Geological Engineer of Watts Griffis and McOuat Limited (the "Technical Report"). The Technical Report is available under Bison Gold Resources Inc.'s issuer profile on SEDAR at

The Company considers Bison Gold Resources Inc.'s resource estimate to be a historical estimate. A Qualified Person as such term is defined by NI 43-101 has not done sufficient work to classify the historical estimate as a current mineral resource or mineral reserve and the Company is not treating the historical estimate as a current mineral resource or mineral reserve. Although the Company believes this source to be generally reliable, such information is subject to interpretation and cannot be verified with complete certainty due to limits on the availability and reliability of raw data, the voluntary nature of the data gathering process and other inherent limitations and uncertainties. There are numerous uncertainties inherent in historical estimates, which are subject to all of the assumptions, parameters and methods used to prepare such historical estimates and reference is made to the full text of the Technical Report with respect thereto. There are no other recent estimates or data available to the Company as of the date of this news release and a detailed exploration program is required to be conducted by the Company in order to treat the historical estimate as a current mineral resource.

ORD Mineral Resource Estimate, November 15, 2013

Bison Gold Resources Inc.












Notes 1. CIM Definitions were followed for classification of Mineral Resources.

  1. Mineral resources that are not mineral reserves do not have demonstrated economic viability.
  2. Mineral Resources are estimated at a cut-off grade of 2.5 g Au/t.
  3. Mineral Resources are estimated at a gold price of $1,500 and a metallurgical recovery of 95%.
  4. High grade assays are capped at 70 g Au/t.
  5. Bulk density of 2.71 t/m3 was used.
  6. Numbers may not add due to rounding