(Vancouver, September 19, 2000) - A total mineral and metallurgical review of the 100% owned Prairie Creek Mine, Northwest Territories, has been undertaken by the new management team of Canadian Zinc Corporation (the "Company") as part of the scoping study currently underway.
After an on site inspection of the property and extensive review of drill core and other technical data, Dr. David Shaw, Company Director and structural geologist, concludes that the deeper stratiform mineralisation identified in earlier drilling is the source from which the cross cutting vein material is derived. This is further confirmed by previous sulphur isotope studies. The currently known vein structure has been identified along a 14 kilometer strike including a 3 kilometer section close to the mine, which contains a mineral resource of 11,846,000 tonnes grading 12.5% zinc, 10.1% lead and 161 g/tonne silver, as reported by M.R.D.I., a division of H.A. Simons Ltd. Approximately 90% of this resource is vein material and 10% is stratiform. Stratiform occurrences have been difficult to identify due to their depth and location. However, previous diamond drilling included secondary stratiform ore grading 5.68% lead and 11.39% zinc over 25.61 meters, and higher grade primary stratiform assaying 29.2% zinc and 12.72% lead over 1.68 meters at a depth of 200 meters below the lowest level in the existing mine. Rising topography and the irregular nature of the stratiform mineralisation are problematical when drilling to extend these stratiform zones, which have been identified over only 1 kilometer within the current resource.
All previous diamond drilling and mapping information is being digitized to aid interpretation and create a new working model. In view of this, the potential to find and develop other high grade, large tonnage deposits outside the area of the currently known resource, appears excellent. An independent review has been commissioned, leading to a program to identify further commercially attractive stratiform deposits within the current known vein structure, and also aid in further exploration strategy elsewhere on the property.
Two metallurgists, Mr. G. Hawthorne of Westcoast Mineral Testing, Vancouver, and Mr. G. Parkin of North East Minerals Ltd., U.K., have been retained by the Company to review the existing 1,000 tonne per day mill, as well as the metallurgical testwork carried out on the property to date. Mr. Parkin reports the mill to be in very good condition, and recommends the inclusion of gravity separation equipment, after crushing but before grinding. This equipment would allow the mill to treat 1,500-1,700 tonnes per day by rejecting harder waste materials early in the milling process, while at the same time producing much higher head grades to grinding and flotation, thus improving mineral recovery and lowering milling costs. Testwork is underway to confirm this opinion and to quantify the benefits to the operation of this low cost improvement to the mill capacity. The results from this testwork will be incorporated into the scoping study expected in January 2001.
A full report on the summer mineral reconnaissance program and reports on current permitting applications will be announced shortly.
This news release may contain forward-looking statements based on assumptions and judgements of management regarding future events or results that may prove to be inaccurate as a result of exploration and other risk factors beyond its control. Actual results may differ materially from the expected results.
John A. MacPherson,
Malcolm J. A. Swallow,
President & CEO