Kenogaming3Airborne Geophysics
In 1983, Dighem flew a frequency domain EM survey, a magnetometer survey, along with a VLF-EM survey over a large area that covered the West Magnetic Anomaly of RT Mineral's Kenogaming Property. They flew the survey for MPH Consulting (Assessment File 42B01NE0105/42B01NE0105). However, only the frequency domain EM results were submitted for assessment work. The EM results indicate a flat lying, sheet like conductor, that could be related to the conductive, serpentinized layer above the ultramafic intrusive rocks, as opposed to conductive overburden. One of the EM anomalies also shows direct magnetic correlation of 1500 nanoTeslas, which would be correlating with magnetite within the serpentinized ultramafic intrusion. The 4 EM anomalies basically cover the magnetic anomaly seen on the government map (Map 81379). The East Magnetic Anomaly was not covered in the Dighem survey.
The Ontario Geological Survey carried out a large GEOTEM airborne EM and Magnetic survey in 1990, that covered the North Swayze - Montcalm Area (Map 81379). It covered the West Magnetic Anomaly, as well as the East Magnetic Anomaly of the Kenogaming Property. There are 3 staggered, weak EM anomalies (3 to 4 channels) that indicate an 'edge effect' from a horizontal sheet-like conductor. To me, this suggests a weak to moderate flat-lying, serpentinized layer above the ultramafic intrusion. There is also direct magnetic correlation, with an intensity of approximately 1100 nanoTeslas.
With respect to the magnetic anomaly of the West Magnetic Anomaly, it exhibits an oval shape about 1000m long by 650m wide. There is a slight dip to the north.
In referring to the West Magnetic Anomaly, it will be noted that there is an isolated, weak magnetic response near the south contact of the main magnetic anomaly. Could this be a feeder zone for the main magnetic anomaly? Unfortunately, this particular area is held (staked) by GFG Resources.
There are no GEOTEM EM responses associated with the East Magnetic Anomaly and the magnetic intensity is very weak. The latter indicates to me that any chance of serpentinization (alteration) is slim. How this would affect the assimulation of nickel within this anomaly, I'm not sure.
There is a stronger north-south diabase dyke traversing through the middle of the east-west magnetic anomaly, which seems to be influencing the east-west magnetic feature. It is suggested that if the magnetic raw data is available from the OGS, then it may be worthwhile to retrieve it, in order to produce a second vertical derivative. The result would make the magnetic picture in this area more clear, as well as to more accurately define the contacts of the potential intrusive body and the diabase dyke. Perhaps a couple of lines of MMI soil sampling over the main part of the magnetic anomaly may result in rendering a source of the magnetic body.