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Image of Treaty Creek’s
West Nunutak in the foreground and
Seabridge Gold’s KSM-Iron Cap in the background

Recently the geophysical data on Treaty Creek (Magnetotelluric & Airborne EM / Mag) was integrated with the geology to show plausible correlations. A very strong correlation was found showing incredible potential on Treaty Creek. These correlations are being proven (thought drilling) to carry mineralization just as they have in the southern half of the Sulphurets Hydrothermal System.

The image below shows that the most prospective geological areas (within 2km of the red Kyba Discovery Line & along or near major faults) have large coinciding geophysical anomalies indicating potential mineralization. The aqua colored areas show the integrated MT / EM / Mag anomalies to a depth of about 500m.

Treaty Anomalies

 

Pretivm and Seabridge Gold have used a very specific form of geophysics which has played a significant role in the discovery and development of their respective deposits.  It’s called a Magnetotelluric (MT) survey.

“MT technology has proven to be an effective tool for conceptual modeling of deep targets at KSM and helped to guide the discovery of the Deep Kerr.  The same method is being used to identify other potential core zones” – Rudi Fronk (CEO Seabridge Gold), 2014.

Since that statement was made, MT technology has been used to discover the “Mitchell at depth” and “Lower Iron Cap” zones and expand the “Deep Kerr” zone.  This technology has proven its accuracy time and again, which is why it has been used so extensively by Pretivm and Seabridge over the years.

In 2016, Tudor Gold conducted the same MT survey on Treaty Creek using the same equipment with the same geophysicist that designed and interpreted the MT surveys on the adjoining properties.  The results of that survey are remarkable as it confirms the geology in showing that the entire system is connected at depth.  The leading authority on the Golden Triangle, and former regional geologist of the area, Dani Alldrick stated:

“Due to the extensive bedrock exposures (gossans and close to surface mineralization) of the Sulphurets porphyry system, we know that the diameter of the Sulphurets system is at least 25 km; this is a measured value documented across the mapped exposure of the intensely altered, pyritized paleosurface of the hydrothermal system which is well exposed through the area as an altered dacite pyroclastic unit, including extensive exposures on the Treaty Creek claimblock”  - Alldrick, 1988.

Surface sampling and drilling on Treaty Creek has confirmed its relationship to other deposits within this world-scale hydrothermal system and now this same geophysical technology that has led to numerous discoveries is also showing a continuation of rock signature and structure at depth within the system.

Below is a macro in-ground MT side image of Treaty Creek with the strongest signature of the mineralized rock being shown in yellow and then shades of brown. The red anomaly carries a lower grade (<0.5 g/t). You can see the yellow enriched feeder system coming up from below a 4km depth in two places.

The Copper Belle drilling to date lies in between CB 16-01 and CB 6-03 (1km), is open to the north, east and west.  This image indicates that the mineralization extends deeper as it goes north and south. It also indicates that the southern feeder system is the same one supplying KSM deposits including the Iron Cap, the Lower Iron Cap, the Mitchell, and Lower Mitchell zones.


The yellow geophysical anomaly indicates the potential for significant mineralization from the common border with Seabridge (left of image) through the heart of Treaty Creek to near the Orpiment zone (right of image); a distance of 7km in length and up to 3km in depth. 

P 02 CBGR2 Section DDH Partial

 

Drilling has confirmed that the highest grades are located where MT and Mag anomalies overlap.  This takes place over large areas of Treaty Creek including the Copper Belle (B) extending beyond current drilling, a large area north of Copper Belle near the GR2/HC zone (C) and in particular, the Konkin zone (A).

Hot Spots

 


Below is an image of the Treaty MT anomaly on the right and the KSM deposits on the left.  These are to scale and therefore give an indication of the potential mineralization on Treaty Creek (in yellow and light red / brown).

KSM MT

 

The image below has the KSM deposits on the left and Treaty Creek on the right.  It shows drilling in the overlapping mag high (pink / red) and MT anomaly on Copper Belle (B) which produced the highest grades in that zone.  There is a far larger mag anomaly overlapping a much bigger MT anomaly at the Konkin zone (A).  This is to scale to give an idea of how big the anomalies are in comparison to the KSM deposits.

 KSM Mag

The GR2 zone appears to be a VMS deposit with well-defined seams and veins ranging from 5.4 g/t gold over 14.5M to 27 g/t gold or 2,280 g/t silver over half metre intervals.  It also contains copper, lead, and zinc.  Tudor Gold is considering exploration work on the Konkin zone due to the anomalies shown above and where early exploration produced grab samples, chip samples and trenching samples carrying in excess of 28 ounces of gold per tonne (over 1.2m).  Both high and low-grade metallic zones have been discovered on Treaty.

 

The image below shows Seabridge’s Iron Cap on the bottom left which holds 25M ounces gold and 10.4 billion pounds copper (all categories).  The yellow line is an approximation of the Treaty Creek border.  The Iron Cap holds the richest grades to date in the KSM and will likely be “the game changer” for Seabridge.

   

Projected Mineralization

                                                                        The red line is where the gepohysical profie pictures were looking, where the geophysics is projecting mineralization, where 9 zones of
                                                                        mineralization exist, and approximately where Seabridge has proposed twin tunnels to run through Treaty Creek to a proposed processing plant
                                                                        / tailing pond.

 

If the MT survey on Treaty is accurate (as it has thus far proven to be) in indicating deposits of this scale, this hydrothermal system could host the largest concentration of metal value in the world.  

ironcap hole V1L