Callinan Mines Limited - Rayfield River

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Suite 1100 - 736 Granville St.
Vancouver, B.C.
Canada V6Z 1G3

Rayfield River

Rayfield River, British Columbia

Rayfield River is located near 70 mile house in central BC. The property is close to a major highway and shipping line. Exploration conducted on the property since the 1950's include soil sampling and magnetic surveys in 1966, as well as geological mapping, soil and rock chem., mag, IP and 31 shallow percussion drill holes. In 1989, IP and geology surveys defined a moderate IP anomaly over a broad area, containing smaller sub-areas of stronger IP responses, which became stronger with depth. There is also a recognized large, regional soil copper anomaly along the Rayfield River Valley. A private report defined the copper zone identified by percussion drilling as an area measuring 1500 by 7000 feet. The area is parallel to the west side of the river, and open to the south.

A radiometric airborne survey conducted by the Geological survey of Canada defined a very large radiometric anomaly in the area. Robert Shives, a notable expert in radiometric surveys and consultant to the Joint Venture, noted in a preliminary report that the anomalies at Rayfield are typical of nearly all porphyry mines, deposits and zones that he has worked with in the Quesnel Trough area, including Afton, Mt. Polley and many others. Rayfield is one of only 3 sizeable airborne gamma ray/mag anomalies in 200 km of coverage extending south from the QR mine. The other two are the Mount Polley Mine area and the Murphy Lake/ Lac La Hache area, operated by Candorado and GWR resources respectively.

Eight previous shallow diamond drill holes were conducted by previous operators to test IP/soil copper anomalies. Of these eight holes, five were better mineralized at depth, some ending in the better grades. Alteration and intense fracturing or brecciation are reported in the higher grade sections. This fracturing, continuing to depth is important in context of the fact that the bornite and chalcopyrite mineralization identified in the diamond drill holes was associated with the fracturing. The report for these holes recommended follow-up, and described a ten-hole program that was never conducted.

Drilling has already commenced on ten diamond drill holes which will total 4,000 meters. These planned holes are located both in areas of previously intersected shallow mineralization, as well as previously un-drilled airborne targets. This program will consist of deeper holes, designed to test the large targets identified by the radiometric surveys at depth.