Molybdenum – Nithi Mountain, British Columbia
The Nithi Mountain Molybdenum property is located in central British Columbia, 8 km south of the Town of Fraser Lake. Fraser Lake is along the Yellowhead Highway and the main CN rail line leading to the port of Prince Rupert. The property is readily accessible by well-maintained logging roads and various exploration trails. High power transmission lines pass a few kilometres north of the claims. The Endako Molybdenum Mine is currently under care & maintenance and lies about 18 km west-northwest of the property. The Endako Mine processed up to 50,000 tonnes per day of 0.05% Molybdenite. This head grade was progressively lowered as lower grades of ore became profitable. It was in production from 1965 to 2015 and has a fully permitted facility with a new mill and roaster. The mine is now under care and maintenance.
Mineralization and Geology
Mineralization on Nithi Mountain is classified as low fluorine, porphyry molybdenum type. This type of deposit is characteristically large tonnage. The mineralization is hosted by the Nithi and Casey intrusive phases of the Francois Lake intrusive suite. The geology, style of mineralization, and nature of associated alteration all bear a strong resemblance to the adjacent Endako Mine.
Previous to Leeward’s work, exploration included soil sampling, rock trench sampling, IP surveying, and diamond and percussion drilling. Leeward acquired the property in 2003. Exploration by Leeward began in the fall of 2004 and extended to 2011. Work included further geological mapping, rock sampling, soil geochemical surveys and airborne geophysical surveys (magnetic, radiometric, resistivity and Lidar) of the property and oriented core drilling programs. From 2005 to 2011, 53,385.17 m of drilling was completed. A baseline environmental study was conducted, and a bulk sample was sent for metallurgical testing (report on the website). In addition, a comprehensive GIS database was assembled. This included compiling over 2,500 soil samples, rock samples, geology, and drill hole data. Overall grades and tonnages are found in the appended reports. These reports are available for download on this website.
Further drilling utilizing improved oriented core technology is recommended to concentrate on geophysical outlined zones at depth within the Nithi Quartz Monzonite as indicated by the airborne geophysical survey in the central and eastern part of the property. Both the Delta and Gamma zones can be expanded with further drilling to increase the grade and expand the reserves. Please find Tables 14.5 to 14.7 for these zones in the Tetra Tech Wardrop report. The Tetra Tech Wardrop resource report recommends 3M work on further drilling in the Delta and Gamma Zones. The Sigma zone remains to be explored and is untested at this time, and drilling is also planned for this zone. Interpreting previous geophysical and geochemical results indicates that the untested Sigma zone has great potential and will be investigated in the next round of drilling. Higher-grade mineralization is associated with the intensely altered quartz feldspar porphyry, aplite dykes and breccia zones. The deposit at Nithi is located within an area with excellent infrastructure and a developed townsite. The grade and tonnage should be considered in this context. Leeward will expand upon the current resource for both grade and tonnage.