RE:More info!https://aris.empr.gov.bc.ca/ARISReports/37482.PDF
tarsands, check out the above report on Evrim Resources Axe Deposit. It's a pretty good report. This property has been around for quite a few years, just down the road from Kodiak's Gate Deposit. They were apparently targeting magnetic highs, but were getting low copper assay results, so they walked away.
My interpretation on porphyry intrusives is that when it comes up to near surface, the outer and upper portions react with the surrounding rocks, and thus there is an alteration to the those rocks in the immediate area. It forms new rocks that are invariably magnetic. Minerals such as magnetite and ilmenite. The center of the porphyry however, remains less altered and therefore less, or non-magnetic, and contains the higher sulphide content.
That's why I think Evrim Resources were drilling the outer areas of the porphyries and getting lower metal values. Also, if there was a thin layer of volcanic rocks overlying the intrusive porphyry, these rocks would have been mineralized, but with lower metal values. Since they were drilling shallow holes, they never got into the center of the porphyry, where the best values are located.
https://kodiakcoppercorp.com/site/assets/files/5822/2021-03-09_-_kodiak_copper_investor_presentation.pdf
If you refer to Page 18 of Kodiak's latest Presentation, you will understand what I'm trying to say. The Gate Zone, the Dillard Zone and the Dillard East Zone are all located within magnetic lows. And notice that the copper-in-soil anomalies all correlate directly with these magnetic lows. The only exception may be the SW corner of Dillard East. Dillard East has the overall, the lowest intensity magnetic feature, indicating to me that there has been less alteration and therefore should render some pretty good metal results at depth.
Gate Zone:
The lowest magnetic intensity and the highest copper-in-soil anomaly is about 2 km south of where they're drilling now. This area should give some interesting metal values, as this area seems to be the center core of the porphyry in this area. I'll call it Gate South. Is the NS Gate and the Gate South trend a structural fault?
Dillard Zone:
The magnetic low seems to be striking in a more EW direction, whereas the copper-in-soil anomaly is striking NW-SE. Is this a fault controlled mineralized structure? There appears to be another magnetic low at the south end, just off the map. Could be an interesting area too.
Dillard East:
This target has the most intense magnetic low of the 3 areas. I can see only 3 older drill holes on it, this area has excellent potential if they drill deeper. Look at how large the copper-in-soil anomaly is.
That's it. I'm not a geologist, so would like to hear from a geologist on my ramblings!!