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Message: Syngenetic Model

Syngenetic Model

posted on Aug 16, 2009 01:11AM

The reference to Kretschmar's syngenetic model and how it may effect the Hercules property has generated a lot of debate and also concern about the impact it may have on gold grades. I don't have the technical expertise to review that model but I have reviewed his website and the technical report prepared on the Hercules property posted on the Kodiak website. I'm putting out the following observations to try and keep this model in perspective:

1) Kretschmar included the Hercules GM and nearby veins in his model based on a site visit according to his website in 2007. He did carry out geologic mapping on the Sage property. There's no indication that he has looked at Kodiak core, had taken samples or done any lab analysis. His conclusions appear to be based on visual examination of outcrop only. The existing geologic model has the GM and associated quartz veins located in the Elmhurst intrusion( a granitoid body). If so then the veins must have post dated the intrusion, probably through fault zones. It order for Kretschmar's model to work here , the granite intrusive must be re-interpreted as a sea floor deposit. He discusses the need for this change on a number of other intrusives in the Archean greenstones. That's going to take a lot more effort than visual observations of a limited amount of the exposed veins.

2) The technical report by InnovExplo discusses the detailed regional and local geology on the Hercules property. They present another explanation for the stacked veins :

"Lode gold deposits associated with structural control commonly present as a stacking of veins along a corridor instead of large continuous veins ".

3) This debate, while interesting, is largely academic. We don't have access to the data to be able to judge between models. Right now we're just chasing the quartz veins with a drillbit. The InnoExplo report did recommend that a "pinch and swell" model be used to drill for the higher grades zones which I hope is being followed by Kodiak.

4) Just out of interest I thought about what if the syngenetic model applied and we might have a large vent or system of stacked vents below the Golden Mile. There should be a significant amount of sulphides there and this might be detectable with an airborne EM system. The map on page 84 of the technical report indicates that they did fly airborne EM and plotted the conductors. Unfortunately, there's nothing near the GM.

Meanwhile we wait patiently for assay results.

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Aug 22, 2009 12:43PM

Aug 22, 2009 12:44PM

Aug 22, 2009 02:26PM
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