Projects

Lentung Tungsten Deposit

Target Type: Tungsten Skarn Deposit

Location: Northwest Territories, Canada

Tungsten Facts

Tungsten, also known as wolfram, is a unique metallic element distinguished by its exceptional physical properties. It has the highest melting point (3,370 °C), highest boiling point (5,900 °C), greatest tensile strength (590,000 lbs) among all metals. It has a high density, equivalent to gold, with a specific gravity of 19.3 g/cc. In addition, tungsten exhibits remarkable hardness, elasticity, ductility, and resistance to corrosion. These properties make tungsten indispensable in modern industry. Its applications span from heavy-duty tools to advanced aerospace technologies

Tungsten is primarily used in the production of steel and non-ferrous alloys, as well as carbide and stellite (cobalt-chromium alloys). These materials are essential for manufacturing products that require extreme durability, such as:
• Tool steels
• Cutting edges
• Hard surfacing components
• Armour plating

Beyond its primary applications, tungsten plays a critical role in several advanced industries, including:
• Electrical systems
• Chemical processes
• Aerospace and space technologies
• Medical field imaging and radiation therapy shielding

Additionally, tungsten alloys are used in surgical instruments and implants. Their biocompatibility and strength provide durability for devices that require long-term implantation and exposure to mechanical stress.

Lentung Property Exploration History

The Lentung tungsten prospect, previously called Lened, was discovered in 1960 by prospectors and tested a year later with 2 short drill holes. The region saw only the occasional, sporadic exploration activities over the next 15 years, during which time a second tungsten skarn occurrence, the Rhodes Tungsten occurrence, was discovered 4.5 km to the east.

In 1976, Union Carbide Exploration Corporation purchased the Lened property and over the next 6 years explored the site intensively, advancing the project to pre-feasibility. Their work included conducting a variety of geochemical and geophysical surveys, detailed geological mapping, metallurgical, economic and environmental studies and drilling 26,900 m in 178 holes. This work led to the discovery of another 15 tungsten mineralized zones over a 10 km strike length.

In 1982, due to declining tungsten price, Union Carbide put the project on hold. In 1984, a subsidiary of Union Carbide, Union Carbide India Limited, suffered a major environmental disaster from its pesticide plant in Bhopal, India. Struggling financially, the company was eventually taken over by Dow Chemical Corporation in 1999. During this period, the Lened property claims were allowed to lapse.

In 1996, the Lened property was re-staked by Yukon prospector Ron Berdahl, and over the next few years, only minor exploration was conducted, eventually leading to the lapsing of the claims in 2014.

Geological Setting

The geological setting of the Lentung area consists of ancient deep water sedimentary rocks of the Selwyn Basin (shale, siltstone and limestone) that have been intruded by younger granitic rocks during the Cretaceous period. The Cretaceous intrusions belong to the Tungsten Suite: a series of intrusions that occur in the eastern Selwyn Basin that are the causative intrusions for the Cantung, Mactung and Lentung deposits, as well as a number of other tungsten-copper occurrences in the eastern part of the Basin.

The tungsten mineralization at Lentung is hosted in altered limestone along the margin of the Lened Pluton. Mineralization consists of the tungsten mineral scheelite. There is also significant concentrations of copper and gold associated with the tungsten at Lentung.

References:

NI 43-101 Technical Report Disclaimer:
Historical resource estimates and metal endowment reported on this website includes measured, indicated and inferred estimates unless otherwise indicated. Mineral resource estimates from NI 43-101 technical reports are believed to be relevant, reliable and the most current as of the date of the presentation. Rackla’s qualified person has not done any verification on these estimates.

NI 43-101 Technical Reports:
Delaney, B., Bakker, F.J., 2014. Technical Report on the Cantung Mine, Northwest Territories, Canada. Prepared for North American Tungsten Corporation Ltd. Effective date September 19, 2014.
Hantelmann, T., Jutras, M., Malhotra, D, 2025. Technical Report, Aurmac Property, Mayo Mining District, Yukon Territory, Canada. Prepared for Banyan Gold Corp. Effective date June 28, 2025.
Harvey, N., Gray, P., Winterton, J., Jutras, M., Levy, M., 2023. Technical Report, Eagle Gold Mine, Yukon Territory, Canada. Prepared for Victoria Gold Corp. Effective date December 31, 2022.
Jutras, M., 2022. Technical Report on the Raven Mineral Deposit, Mayo Mining District, Yukon Territory, Canada. Prepared for Victoria Gold Corp. Effective date September 15, 2022.
McCarthy, R., Saunders, E., Schmidt, I. G., Herrera, M., Miller, M., Jensen, S., Clarke, J., Dance, A., Burrell, H., Haggarty, S., Redmond, D., 2025. Independent Preliminary Economic Assessment for the Rogue Project Yukon, Canada. Prepared for Snowline Gold Corp. Effective date March 1, 2025.
Simpson, R. G., 2025. Florin Gold Project, Technical Report, Mayo and Dawson Mining Districts, Yukon Territory. Prepared for Gold Strike Resources Corp. Effective date December 5, 2025.
Simpson, R. G., 2026. RC Gold Project, NI 43-101 Technical Report, Dawson Mining District, Yukon Territory. Prepared for Sitka Gold Corp. Effective date February 25, 2026.

Non NI 43-101 Reports and Data Disclaimer:
Rackla Metals has obtained original data and internal company documents from Union Carbide Exploration Corporation that dates from 1977 to 1985. This data includes original drill logs, geochemistry, metallurgical, environmental, engineering and economic studies and reports. This presentation also references government publications and journal articles that reference these studies. The data, reports and articles are not NI 43-101 compliant and have not been verified by a qualified person. Rackla Metals is not treating these as current. Accordingly, investors should not place undue reliance on this information.

Non NI 43-101 Reports and Articles:
Burston, M. J., 1983. The Lened Tungsten Deposit 1982 Report. Union Carbide Exploration Corp. internal company year-end report dated January 1983.
USGS, Scientific Investigations Report 2020–5085, Grade and Tonnage Model for Tungsten Skarn Deposits—2020 Update. From Forster, C.N., Burson, M.J., and Glover, J.K., 1979, The Lened tungsten deposit—Oral presentation at the 7th Geoscience Forum, Whitehorse, Yukon Territory, December 2–4, 1979.
Wollery, R.G., 1982. Union Carbide Exploration Corporation, Metals Division, Lened Project, Operating Cost Estimate. Union Carbide internal company memorandum dated November 10, 1982. Rackla Metals is not treating these as current operational parameters.