Surge Coppers’ large 72,710 hectare Ootsa claim block remains largely unexplored despite showing multiple zones of mineralization within a 57 km long belt of highly prospective geology. From 2004 to present the Company has had excellent exploration success within a focused area around the Seel and Ox deposits, with the discovery of the East and West Seel deposits under shallow cover, and significant expansion of the Ox deposit. The large West Seel deposit remains open and the areas surrounding, and on trend, with the Seel and Ox deposits remain under explored.
Ootsa Property Claim Map showing the location of known mineralized zones.
Targets Adjacent to the Seel and Ox Deposits
The maps below show the location of the main exploration targets surrounding the Ox and Seel deposits. The zone immediately surrounding the East and West Seel deposits is considered the highest exploration priority for porphyry style Cu-Au mineralization. The West Ox, East Ox, Bull, and Northeast Ox targets are also porphyry Cu-Mo-Ag targets. The North Damascus, East Damascus, Blackjack, and Far East targets are primarily silver or gold vein targets. Damascus is a known zone of high grade silver mineralization with considerable historic drilling that has not yet been explored by Surge Copper. Historic drilling at Damascus includes an intercept of 3.8 metres grading 1228 g/t Ag and 13% Pb+Zn in hole DM-21.
Location of the main exploration targets around the Ox and Seel deposits.
Induced Polarization (IP) geophysical surveys have proven very effective in identifying the large sulfide systems associated with porphyry style mineralization on the Ootsa property. The IP map below shows the location of the Seel and Ox deposits and the chargeability highs associated with each. There is a large chargeability anomaly located west of the Ox deposit, termed West Ox, and another east of the Ox deposit termed East Ox. Together these anomalies form an east-west trend of chargeability highs termed the Ox Trend. The Ox Trend extends over a strike length of 7 kilometres on the Ootsa property and connects with a similar east-west trend at the Huckleberry Mine to the west. The Seel deposit also has chargeability anomalies trending roughly east-west and this has been termed the Seel Trend.
Ootsa Property modeled IP chargeability at 50 metres depth showing the Ox and Seel Trends.
The highest priority drill targets are located on strike with the East and West Seel deposits, and are scheduled for drill testing in 2018. The Figure below highlights 5 drill targets that are based on chargeability and resistivity response, magnetic data, geochemical response, and available geologic data. Target number 1 is directly on strike to the west of East and West Seel, contains a similar chargeability and resistivity response, and is associated with a large copper in soil anomaly.
Geophysical maps over the Seel deposits. Left, chargeability model at 150m depth showing the outline of the proposed open pits at East and West Seel, the outline of copper in soil anomalies, and exploration targets. North is to the top of the maps.
It should be noted that a large breccia pipe was discovered at the West Seel deposit during 2014 drilling and the target area to the west has potential to host additional breccia pipes. Breccia pipes are significant has they host higher than average grades in some porphyry systems.
Other Targets on the Ootsa Property
New logging has occurred within the Ootsa claim block during the past 3 years and provides new access and potentially new exposures over large areas. This access facilitates low cost exploration and new cut blocks will be prospected, mapped, and sampled during 2018.
During 2018 the Company intends to advance other areas of known mineralization to the drill stage. Permitting is underway to allow a historic access trail into the Captain Mine to be re-opened which will enable the area to mapped and sampled cost effectively. The historic Captain Mine contains 2 adits which follow a high grade silver lead zinc vein. One of the adits extends about 100m into the hillside and remains in good condition. The Company has collected 2 grab samples from the adit which returned values up to 2220 g/t Ag (65 ounces per tonne), 9.2% Pb, and 0.27% Cu. The exposed vein at Captain can be readily explored from the underground workings and from surface exposure. The area surrounding the vein contains widespread alteration and is considered prospective for additional high grade silver base metal veins. The zone is interpreted to represent the upper parts of a porphyry system, so it is also prospective for larger gold-silver zones, and perhaps porphyry copper mineralization at depth.
Photographs from the Captain Mine. Left: upper adit. Right: vein in roof and wall of upper adit.
The Damascus zone is another known high grade silver base metal deposit being considered for exploration during 2018. The Damascus Vein contains a historic resource of 196,000 tonnes grading 411 g/t Ag and 7% combined Pb + Zn to a down dip depth of 100 m.
This resource is historical and is not compliant with NI 43-101. It was estimated for Lansdowne Oil and Minerals in a 1984 company report titled “Review of 1982-83 Exploration Lean-To and Panther Groups of Mineral Claims Tahtsa Lake Area Omineca Mining Division BC”. The historical estimate was done using a cross sectional method based on drill holes and additional drilling is required to verify the historical estimate. A qualified person has not done sufficient work to classify the historical estimate as current mineral resources or mineral reserves and Gold Reach is not treating the historical estimate as current mineral resources or mineral reserves.
Exploration Program Objectives
Ongoing exploration work at Ootsa will have the following objectives:
- Explore and define the numerous Cu-Au bulk minable targets proximal to the Ox and Seel deposits and incorporate these into Preliminary Economics.
- Advance the main deposits with continued baseline, technical, social and environmental work.
- Systematically conduct early stage exploration on known gold, silver, copper, zinc targets and advance to the drill stage.
- Conduct grass roots exploration in areas with good access to continually identify new exploration targets and increase the geologic understanding of the large claim block.