Timmins4Open File Report 6042
This report details the area geologically, with several excellent ideas as to where the 'orebody' could be located. Referring to Figure 2, it is noted that a fault appears to be heading towards the western area of RTM's property. Of interest too, are the anticline and syncline structures, as these will affect the direction of drilling.
On page 26, the author C. Vaillancourt comments that:
"In the Cross Lake and Sheraton Lake areas, up dip projection of the stratigraphic units from the core to the surface requires the presence of north-north-west trending faults in order to correlate units within the holes. It is possible that the Cross Lake and Sheraton Lake zones were originally continuous, but were sinistrally offset by one of these north-north-west trending faults. On a regional scale, these smaller faults are parallel to the Cross Lake Fault of Pyke (1976). This fault would be located at the contact between the Tisdale and the Kinojevis assemblages. In the map area, no direct surface expression of the fault has been observed and the contact is thereby assumed to be stratigraphic. It is probable that displacement has occurred along that contact or at least portions of it".
Could there have been a similar displacement on RTM's property, as a result of the Gibson Lake Road Fault (GLRF)? Also, note on Figure 2 that the Tisdale Assemblage rocks are located west of the fault, while the Kinojevis Assemblage rocks are located on the east side of the fault. That said, it's the Tisdale rocks that are usually a more favourable host for VMS deposits, especially within the top of the horizon. However, if the GLRF has had a lateral displacement, then it's possible that Tisdale rocks could also be on the east side of the fault too. Since there are no outcrops on the east side of the fault, and as far as I know, no drilling either, it may be difficult to find out if there are any Tisdale rocks on the east side of the fault, except by drilling.
Vaillancourt continues on by saying: "The Dougherty Lake area is located in the calc-alkaline upper portion of the Tisdale assemblage, which is the same as that of the Cross Lake Minerals Limited discovery. However, the lithologies are different. Exploration work in the Dougherty Lake area has been mostly concentrated near what would be the base of the assemblage (Tisdale), close to the contact with the tholeiitic to komatiitic lower portion of the Tisdale. The preponderant lithologies are mafic-pillowed flows. The Cross Lake discovery is located close to the top of the assemblage or the contact with the overlying Kinojevis assemblage where felsic and intermediate volcaniclastic rocks are dominant"
The above are very interesting thoughts!! Does the above mean that the Upper Tisdale is within Dougherty Lake itself, and especially east of the lake, near the contact with the Kinojevis Assemblage? By using the information on Map P3421, and by using the magnetic data, one may be able to locate the contact between the Tisdale and Kinojevis Assemblages. Whole rock analysis of future drill core will be a priority for assisting with the classification of the rocks.
Map 2577
On this map, there is another north-south fault that is parallel to the GLRF, and is located a short distance to the east of RTM's property. It continues south and terminates near Matatchewan. At this point, I'm not sure what it's influence would be on the RTM property.