Sheba 3In 1997, Aerodat carried out an airborne frequency domain EM and Magnetic survey over a large area that included the eastern half of the Sheba South Block (Sheet 3)(42A01NW2001/42A01NW2001). There were no EM anomalies intercepted that would be associated with a massive sulphide target. There were a few very weak anomalies that, in all probability, would be related to conductive overburden. Two linear trends, both striking north-south, were picked up, one in claim 1223502 and a second in claim 1221981 (Dunn's claims). They may both be related to either shear zones or geological contacts. The one feature of interest was a large northeast-southwest magnetic anomaly, about 1200m long by 300m wide. However, it doesn't have any EM responses associated with it. The lithology in this area is generally north-south, but this magnetic anomaly strikes NE/SW. Could it be an ultramafic intrusive? That said, with no EM response, it means the likelihood of no serpentinization. The lack of EM responses could however, also be related to disseminated sulphides.
As well, the Aerodat airborne survey covered the area that included the western half of the Sheba South Block (Sheet 1)(42A02NE0004/42A02NE0004). There were a few very weak anomalies intercepted, that are probably overburden related. The Apparent Resistivity Map showing the 32Hz data is not of interest, because it probably shows most areas of conductive overburden. They should have filed the 4175 Hz coplanar for Assessment credits, as the frequency would have given a better depth of penetration. The Total Magnetic Field generally shows the north-south lithologies. Most trends are very narrow. Because of the scale of the map that I had, a more detailed interpretation was not possible.
I was unable to retrieve Sheet 2 from the Assessment Files, so I can't give any comments. This map sheet covered portions of the Sheba Central Block.
Also in 1997, Quantec Consulting Inc. carried out a Time Domain EM-37 survey (42A02NE0005/42A02NE0005) over an area, covering a small portion of the Max-Min survey area. Again, the results were discouraging, when it comes to detecting VMS zones. Three weak anomalies were intercepted, but they were interpreted as being related to magnetite-rich sources. However, the latter may be of interest, because of its potential association with ultramafic lithologies, such as pyroxenite and peridotite.
Gary Dunn carried out a small magnetic survey and some random soil sampling near the Sheba South Block in 1998 (42A02NE2002/42A02NE2002). The magnetic survey was done within Squaw Lake, which is just outside of RT Mineral's property. The results really didn't provide any evidence of the existence of ultramafics. One line of soil sampling was run along the northern boundary of the Matachewan Indian Reservation. There were no results of any interest. He then took some random soil samples within the western region of the Sheba South Block. Only one sample was of any interest and that one was located just north of Rocky Lake. It was Sample No. D97SQW29P that gave 450 ppb Au. The sample is located very close to the western claim line of RT Minerals property. However, it is felt that follow-up (soil sampling) should be considered for the area north of this sample. This gold sample is located very close to a major north-south fault zone, one that continues south through Matatchewan.
In 1998, International Canalaska Resources carried out a DIGHEM airborne EM and Magnetic survey (42A07SE2003/42A07SE2003) that covered most of Timmins Twp to the north, but it also included a small area of the Sheba North Block in Michie Twp. Referring to the Electromagnetic Anomalies Map, I noted a conductor within Mackay Lake and four others that are located within other smaller lakes. Since I don't have the EM profiles, I can't tell whether or not they are bedrock related. Some of them correlate with a magnetic anomaly. That said, at this point, I would have to assume that the conductors are associated with conductive lake bottom sediments. It would take other more positive information, in the vicinity of these conductors, before I would take any further interest in them.