MilliganThe Milligan gold property of RT Minerals is located approximately 75 km northeast of Timmins, Ontario, near the southwest shore of Lake Abitibi. It is located within a belt of mafic to ultramafic metavolcanic rocks (Map 2543). The area is believed to be prospective for gold, as there are two areas close by, that have previously been widely explored, to the west there is Galleon Gold Corp near Eastford Lake, and to the northwest, there is the Kerrs Gold Zone of McLaren Resources. Each gold occurrence has given some interesting gold values.
In order to make my Milligan post a little easier to follow, I've decided to write it based on a yearly profile, that is, from the oldest info to the latest. In that way, I'll try to get the most information out of each source that I've obtained for that year.
The oldest map (1960) that I was able to find, was a geology/magnetic map, Map P.104. It does not show any rock types within the property, except for the northwest-southeast trending 'diabase dyke' alongside the western boundary of the property. This is also noted with the magnetic data. However, it is believed that mafic to ultramafic rocks underlie most of the property. The eastern half of the property appears to be located within a broad magnetic low. This is the area that RT Minerals considers to be of some importance, because of its potential to contain multiple shear zones, which could be gold bearing.
It looks like the eastern half, as well as the southern half of the property, is overlain with clay.
In 1964, Canadian Aero Mineral Surveys flew a frequency domain electromagnetic and magnetic survey over an area in Milligan Twp for H.H. Wright, that covered all of RT Mineral's property (42A09NE0349/42A09NE0349). However, there were no EM anomalies intercepted. The EM survey used a 360 Hz frequency system, which the low frequency would have been useful for depth of penetration. However, there are either no bedrock conductors, or the conductors were too deep to be picked up.
The magnetics show the strong northeast diabase dyke touching the southernmost part of the property. However, they interpreted the northwest trending magnetic feature that traverses by the western area of the property as 'peridotite'. They also interpreted another northwest magnetic feature that touches the northeast corner of the property as peridotite as well. It is the area between these 2 interpreted 'peridotite' bands that RT Minerals appears to have staked. Is this the shear zone corridor that they are interested in? Note another short magnetic anomaly just off the western boundary of the claims, that was also interpreted as peridotite. I suspect that H.H. Wright did the interpreting, and not Canadian Aero Mineral Surveys.
In 1972, the Ontario Geological Survey released Map P.772, which covers all of RT Mineral's property. It is basically a geological compilation map, with some of the geophysical axis (EM and Mag) drawn on the map. To the west of the Milligan property, one of the drill holes put down intersected gold in intermediate flows, felsic metavolcanic flows and quartz-feldspar porphyry. There was 275 feet of overburden. At the bottom of Map P.772, it shows the northwest trending diabase dyke that was previously interpreted as 'peridotite'.
Again, over to the west in Warden Twp., near Eastford Lake, there were a number of locations where soil samples were taken (Map P.775). Several of them assayed for mercury (Hg), which to me, would be a good pathfinder to be used on the Milligan property, when looking for gold. It should have been followed up with more samples taken, in order to develop a Hg halo over the center of a potential gold target.