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Impact Minerals Limited
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With a mining lease application underway and a scoping study that shows excellent economics, Impact Minerals’ game-changing, advanced Lake Hope high-purity alumina project makes for a compelling investment case.
Overview
Impact Minerals (ASX:IPT) is an exploration and development mining company focused on discovering and developing new resource projects within Australia. Lake Hope, a transformational acquisition by the company and its current flagship asset, is a high-purity alumina (HPA) project in Impact’s home territory of Western Australia, a tier-one jurisdiction.
This advanced-stage project allows the company to fast-track the asset toward development, firmly establishing the company on the road to production and increasing shareholder value.
HPA is a high-value product with various uses in several industries that are key to the transition to a low-carbon world. It is mainly used in LED lighting, micro-LED screens, and ceramic-coated separators in lithium-ion batteries. Both these markets are forecast to grow dramatically over the next decade, and a looming supply shortage is predicted for 2026.
HPA is also necessary for producing synthetic sapphire and scratch-resistant glass. With these ever-widening applications for HPA, demand for this resource is expected to grow from US$3.18 billion to US$12.21 billion by 2030 with a compounded annual growth rate of about 20 percent.
Lake Hope is the company’s current focus as it moves towards production, and where a very shallow, high-grade resource of HPA precursor material has been identified in the top two meters of a dry salt lake. The deposit has unique physical and chemical properties that will allow for inexpensive digging and mining, with transportation to a processing facility off-site in an established industrial area. This will accelerate the approvals processes required to get into production.
With a mining lease application pending, Impact aims to bring Lake Hope, which contains almost 1 million tons of potential HPA, into production when the forecast average price for 4N HPA (99.99 percent Al2O3) and related products is about US$20,000 per ton. The ‘4N’ designation indicates the purity grade, making it suitable for high-tech end uses.
Outstanding economics from the latest scoping study released by the company shows Lake Hope’s potential to be the lowest-cost producer of HPA globally by up to 50 percent.
Lake Hope has a maiden mineral resource estimate (MRE) of 3.5 million tons at 25.1 percent alumina (Al2O3) for a contained 880,000 tons of alumina. The company also received heritage clearances for the entire Lake Hope deposit further de-risking the project and providing another critical component in the company’s application for a mining lease.
Impact completed a bulk sampling and test pits program at the Lake Hope project in December 2023, and later reached a key milestone by producing HPA greater than 99.99 percent (4N) purity from the metallurgical processing of lake clays acquired from Lake Hope.
In February 2024, a new proprietary metallurgical process for producing HPA from the lake clays was identified. Impact produced 99.99 percent (4N) Al2O3 from a low-temperature leach (LTL) process. The LTL process may lower the capital and operating costs to produce HPA compared to the sulphate process which underpinned the recent scoping study. The LTL process will be included in the ongoing pre-feasibility study in parallel with the sulphate process at marginal extra cost to determine the best processing route to HPA. The PFS is due to be completed in late 2024.
A comparison of the LTL process and the sulphate process
The company is well funded to finance the pre-feasibility study at the Lake Hope High Purity Alumina project and exploration activities at the Arkun battery minerals project.
Impact Minerals has been awarded a $2.87 million grant for the commercialisation of its innovative process to produce High Purity Alumina (HPA) from the Lake Hope deposit. The grant is under the Federal Government’s Cooperative Research Centres Projects (CRC-P) program which fosters short-term, industry-led research collaborations. The grant is part of an estimated $6.4 million research and development project to be completed within three years and designed to provide Impact with the relevant information required to complete a definitive feasibility. A key component of the grant funding will be to construct a pilot plant, which is a key goal for 2025, and this will provide consistent material for off-take and qualification trials.
Impact Minerals was also one of the inaugural cohort of seven companies selected to be part of the prestigious BHP Xplor program. BHP Xplor, an accelerator program introduced by BHP in August 2022, is designed to help provide participants with the opportunity to accelerate their growth and the potential to establish a long-term partnership with BHP and its global network of partners.
The BHP Xplor funding was used to identify new target areas for copper and other energy metals around the Broken Hill area in New South Wales, eastern Australia, where Impact has been quietly adding to its ground position for several years.
Additionally, the company is exploring its large Arkun battery metals project, also in Western Australia which covers nearly 2,900 square kilometres. Three new exploration licence applications were submitted recently immediately north of the Arkun project along trend from the recently discovered REE soil geochemistry anomalies at Hyperion, Swordfish and Horseshoe, and the Caligula copper anomaly. These anomalies require drill testing which will occur in 2024 and is an exciting development in the emerging mineral province of southwest WA.
A strong management team with over 50 years of combined industry experience leads the company. With a mining and exploration geology degree, Dr. Mike Jones, managing director, launched a long career consulting and leading mining organizations. Peter Unsworth, the non-executive chairman, has more than 35 years of experience in multiple financial sectors, such as securities industries and wealth management. Paul Ingram, a non-executive director, has led several mining companies since 2003. Impact Minerals has the experience and expertise to lead the company to success.
Company Highlights
- Impact Minerals is an exploration and development mining company focused on rapidly moving its flagship Lake Hope high-purity alumina (HPA) project toward production.
- The Lake Hope project has a high-grade maiden mineral resource estimate (MRE) of 3.5 million tonnes at 25.1 percent alumina (Al2O3), for a contained 880,000 tonnes of alumina that can be converted to HPA.
- HPA is used throughout multiple industries, and the overall HPA market is projected to grow by a CAGR of 18.4 percent by 2030.
- A pre-feasibility study is currently in progress and scheduled to be completed by Q4 2024. A mining lease application for the Lake Hope High Purity Alumina (HPA) was recently lodged with the aim of being granted by 2026.
- The company’s project portfolio also includes assets with high-grade mineral deposits of a range of base, critical and precious metals.
- Impact Mineral’s 2,000-square-mile Arkun nickel-copper-PGE project in Western Australia has produced encouraging assays that motivate further exploration. Maiden drill programmes are planned for early 2025.
- The company is also exploring its Broken Hill copper project in New South Wales following a major grant under the auspices of the BHP Xplor program in 2023..
- A strong management team leads the company with experience in geology, mining and corporate finance.
Key Projects
Lake Hope HPA Project
Impact Minerals’ Lake Hope HPA project is in Western Australia, a tier-one mining jurisdiction. HPA is a crucial component in many new and emerging technologies, creating ongoing demand for high-grade sources. The Lake Hope project is the company’s flagship as it moves toward production.
Project Highlights:
- Maiden Mineral Resource Estimate: A maiden mineral resource of 3.5 million tonnes at 25.1 percent alumina (Al2O3) for a contained 880,000 tonnes of alumina has been defined at the Lake Hope HPA Project. About 88 percent of the resource, or 775,000 tonnes of alumina, is in the higher confidence indicated resource category.
- Amenable to Open-pit Mining: The Lake Hope project is a unique HPA asset amenable to shallow, open-pit mining. The deposit is soft and shallow, allowing for cheap digging and minimal infrastructure requirements. This type of deposit also lowers the environmental footprint of the operation.
- Fast-tracked to Production: A mining lease application is currently underway. Once granted, the company will begin working towards a pre-feasibility study and mini pilot plant. Impact Minerals plans to reach a complete pilot plant by 2026.
- Impressive Results of the 2023 Scoping Study: Outstanding economics show Lake Hope to potentially be the lowest-cost producer of High Purity Alumina (HPA) globally by up to 50 percent. Key outcomes from the scoping study include:
- Annual production of 10,000 tpa of 4N HPA with an initial 25-year mine life
- Annual EBITDA of A$174 million.
- 2 years construction period with 5,000 tonnes of production during the first year, 8,000 tonnes in the second year and 10,000 tonnes of production thereafter.
- US$934 million post-tax NPV8 at an IRR of 55 percent.
- Mining Lease Application: Amining lease application was lodged in mid-2024 over the West Lake resource while a miscellaneous licence application (L63/99) was lodged to cover mine infrastructure and haulage road.
The scoping study was underpinned by a sulphuric acid process allowing the company to achieve a new milestone by producing HPA with purity of more than than 99.99 percent (4N) from the metallurgical processing of lake clays acquired from Lake Hope. The company further identified a new proprietary metallurgical process for producing HPA from the lake clays. Known as the low-temperature leach (LTL) process, this also produced 99.99 percent (4N) Al2O3 and has the potential to lower even further the capital and operating costs to produce HPA compared to the sulphate process. The LTL process will be included in the ongoing pre-feasibility study along with the sulphate process to determine the best processing route to HPA. The PFS is due to be completed in late 2024.
Broken Hill Copper Project
The Broken Hill project has a significant land position of 815 square kilometers and hosts multiple targets with the potential for high-grade copper. Broken Hill is located in New South Wales, Australia, an area known for its prolific silver-lead-zinc mining operations and the giant Broken Hill deposit.
Project Highlights:
- Participant in the BHP Xplor Program: Impact was selected for the BHP Xplor program in 2023 based on its Broken Hill project. The program is designed to allow participants to accelerate growth and establish a long-term partnership with BHP.
- Potential for Additional Minerals and Deposits: As well as copper, the project has significant exploration potential for magmatic nickel-copper-PGE sulphides, and at the time the host rocks were formed, Broken Hill was located close to the world-class nickel-copper-PGE deposit of Jinchuan and the significant Lengquisheng deposit. The project area also has the potential to contain zinc-lead-silver deposits, providing even more value.
Arkun Nickel-Copper-Gold-Lithium-REE Project
The Arkun project is a 2,900-square-kilometer nickel, copper and gold project located in the emerging Ni-Cu-PGE province near the world-class Julimar Ni-Cu-PGE deposit and surrounded by Anglo American Corporation, which secured its ground holding shortly after Impact secured its asset. Anglo-American is one of the world’s top ten mining companies, and their presence in the region brings confidence in the project’s potential.
Project Highlights:
- Additional Exploration Underway: Impact plans follow-up work programs, including drilling, at its priority targets.
- Significant Targets Identified: Recent soil sampling identified two new prospects:
- Hyperion prospect - Located in the northwestern part of the project area returned with rare earth element anomalism of up to 5,880 ppm (0.59 percent) total rare earth oxide (TREO+Y) and neodymium and praseodymium (Nd+Pr) of up to 21 percent.
- Caligula prospect - Initially identified on the roadside, the Caligula prospect is a large and significant target for porphyry copper mineralisation.
- Three New Exploration Licences: Impact applied for three new exploration licences expanding Arkun project along trend from the recently discovered REE soil geochemistry anomalies at Hyperion, Swordfish and Horseshoe as well as the Caligula copper anomaly.
Management Team
Peter Unsworth - Non-executive Chairman
Peter Unsworth, formerly a chartered accountant, has over 35 years of experience in the corporate finance, investment and securities industries and a wealth of management experience with public and private companies. A former executive director with a leading Western Australian stockbroking company, Unsworth has been a director of several public exploration and mining companies. He recently completed a long time serving as chairman of the Western Australian Government-owned Gold Corporation (operator of The Perth Mint). Unsworth is the founding chairman of Impact Minerals.
Dr. Mike Jones - Managing Director
Dr. Mike Jones is the founding managing director of Impact Minerals Limited, which was listed on the Australian Stock Exchange in November 2006. Reporting to the board of directors, he is responsible for the company's performance as it moves towards production at its Lake Hope High Purity Alumina Project and also for implementing strategies to explore and maximize the value of the company's other extensive tenement holdings.
Since listing, he has helped raise more than $60 million to help fund the exploration of Impact’s projects and managed the company through significant adverse events, including the global financial crisis and the Fukushima nuclear disaster, which affected Impact’s considerable investment in the uranium sector, a five-year global downturn in the mining sector and more recently, the COVID-19 pandemic.
Paul Ingram - Non-executive Director
Paul Ingram is a geologist with extensive experience managing major mineral exploration programs for several publicly listed companies and has been involved in the mining sector for over thirty years. He has designed and implemented innovative techniques for exploration in remote areas and has managed projects in countries throughout Australia and East Asia. Ingram has been a director of the following listed companies in the past three years: Polo Resources from January 2008 to January 2011; A-Cap Resources since June 2009; Consolidated Global Investments since September 2006; Caledon Resources from February 2003 to March 2008; and Australian Pacific Coal since March 2011.
Dr Frank Bierlein - Non-executive Director
Dr. Frank Bierlein is a geologist with 30 years of experience as a consultant, researcher, lecturer and industry professional. Bierlein has held exploration and generative geology management positions with QMSD Mining, Qatar Mining, Afmeco Australia and Areva NC, and consulted for, among others, Newmont Gold, Resolute Mining, Goldfields International, Freeport McMoRan, and the International Atomic Energy Agency. He is currently a non-executive director of PNX Metals. He was previously a non-executive director of Gold Australia NL and chaired the advisory board of a Luxembourg-based private equity fund between 2014 and 2021.
Ore Purchase Agreement with Westgold Resources Unlocks Gold Production from Crown Prince
HIGHLIGHTS
- New Murchison Gold (NMG) and Westgold Resources (Westgold) have entered into an Ore Purchase Agreement (OPA) which will underpin production from NMG’s Crown Prince deposit near Meekatharra, Western Australia in 2025.
- Subject to final regulatory permitting, under the OPA, NMG will commence mining from a new open pit operation at Crown Prince with a targeted commencement date of mid-2025.
- Ore will be hauled 33km by road to the Bluebird Gold Processing Plant, part of Westgold’s Murchison Gold Operations at Meekatharra.
- Ore will be sold to Westgold in several parcels (Ore Parcels) totalling 30-50kt per month with each Ore Parcel certified for grade, moisture and recovery from sampling at the Crown Prince site and a recovery factor agreed for each mining bench from test work replicating the Bluebird Mill circuit.
- The OPA has no fixed term although NMG envisages that most of Crown Prince ore is likely to be processed in an “Initial Period” which runs over the first 24 months of the agreement. Thereafter ore tonnages are to be agreed on a rolling three-month basis once production forecasts have been completed by NMG and Westgold has confirmed mill availability.
- Westgold will purchase ore from NMG based on contained gold in each Ore Parcel at the prevailing AUD gold price in the month the Ore Parcel is collected (minus processing costs and a capital recovery charge). Westgold must promptly collect Ore Parcels that are available for collection.
- The OPA is subject to shareholder approval (Listing Rule 10.1 requirement) at a general meeting of NMG shareholders to be held in late January or early February 2025.
- NMG and Westgold have also entered into an ancillary agreement (Licence and Access Water Discharge Deed) which facilitates NMG’s potential dewatering requirements at Crown Prince.
Alex Passmore, NMG’s CEO commented: "We are very pleased to announce the Ore Purchase Agreement with Westgold as it sees both companies working together to support the development of NMG’s Crown Prince deposit in a capitally efficient manner.
We see this Agreement as beneficial to all shareholders with Westgold acquiring additional high grade oxide ore feed to supplement its Meekatharra operations and NMG transitioning to a producer for modest capital.
The Bluebird Processing Plant owned by Westgold is ideal for NMG due to its close proximity and well-matched metallurgical process. We believe the robust frameworks and protocols we have put in place in this Agreement aligns both operational teams to a common goal of maximizing operational efficiency.
We thank the Westgold team for the technical and commercial work that has led to this Agreement and look forward to working collaboratively in making the development of Crown Prince a success”
Crown Prince is located to the north of Meekatharra, around 33km via road to the Bluebird Gold Processing Plant (Bluebird) owned and operated by BBGO. Westgold and NMG have been working collaboratively on the OPA to manage technical risks and to share economic synergies which are available via the partnering of production from the Crown Prince deposit and milling at Bluebird.
Key Terms of the OPA are outlined in the Table below and will be explained fully in a Notice of Meeting to be sent to NMG shareholders in December. The NMG shareholder meeting is likely to be held in late January or early February 2025. As a result of Westgold’s 18.7% ownership of NMG, it is deemed a related party under the ASX Listing Rules and so the OPA includes a condition precedent of NMG obtaining shareholder approval under Listing Rule 10.1.
BDO Corporate Finance Australia Pty Ltd (BDO) has been engaged to provide an opinion and Independent Expert’s Report to accompany the Notice of Meeting to assist shareholders in their considerations of whether or not to approve the OPA moving into operation.
Should the conditions precedent be met (shareholder approval) the OPA will come into effect with NMG expecting mining approvals to be received in early April 2025. Once mining operations commence, and ore stockpiles are built up, it is anticipated that first Ore Parcel sales will occur in September 2025.
The company is working towards an ore reserve estimate to provide further detail on the economics of the project which is to be released shortly.
Plan of Access and Water Infrastructure - Crown Prince
Authorised for release to ASX by the Board of New Murchison Gold Limited.
Click here for the full ASX Release
This article includes content from New Murchison Gold Limited, licensed for the purpose of publishing on Investing News Australia. This article does not constitute financial product advice. It is your responsibility to perform proper due diligence before acting upon any information provided here. Please refer to our full disclaimer here.
Lahontan Gold Announces Positive Preliminary Economic Assessment for Santa Fe
Lahontan Gold Corp. (TSXV:LG)(OTCQB:LGCXF)(the "Company" or "Lahontan") is pleased to announce results from a positive Preliminary Economic Assessment(" PEA") on its flagship Santa Fe Mine gold-silver project located in Nevada's prolific Walker Lane Trend. The PEA was prepared by Kappes, Cassiday & Associates ("KCA") of Reno, Nevada with mine planning and production scheduling contributions from RESPEC Company LLC ("Respec"), Reno, Nevada and mineral resource estimation by Equity Exploration Consultants Ltd. ("Equity"), of Vancouver, British Columbia, in accordance with Canadian National Instrument 43-101, Standards of Disclosure for Mineral Projects ("NI 43-101").
PEA Highlights:
- Pre-tax Net Present Value at a 5% discount rate ("NPV5") of US$265.1 M with a 41.0% IRRwith an After-tax NPV5 of US$200.0 M with a 34.2% IRR utilizing a $2,705/oz gold price and a $32.60/oz silver price ("spot metal prices") (see spot metal price to base case metal price comparison in Table 1).
- Total Life-of-Mine ("LOM") Pre-tax net cash flow of US$373.3 M and After-tax net cash flow of US$288.9 M over a nine-year project life using spot metal prices.
- Total projected LOM revenue of US$930.8 M over a nine-year project life using spot metal prices.
- LOM strip ratio of only 1.54 (waste to mineralized material ratio).
- Estimated pre-production capital costs of US$135.1 M including a 20% contingency, with a payback of 2.9 years using spot metal prices.
Kimberly Ann, Lahontan Gold Corp Executive Chair, CEO, President, and Founder commented: "Lahontan is very excited about the results of the PEA: a low-capex, highly profitable mining project with a quick payback certainly bodes well for the future of Lahontan and all stakeholders. There is considerable potential to expand gold and silver resources, therefore this is just the first step in restarting mining operations at Santa Fe. With mine permitting well under-way, targeting a 2026 mine ground-breaking, the potential for the Company to realize the economic outcomes outlined in the PEA is very real, especially given current trends in gold and silver prices. Continued optimization of the mine plan, resource expansion drilling, and refining the metallurgical flow sheet are planned for 2025, in parallel with our permitting activities."
The PEA is preliminary in nature, includes Inferred Mineral Resources that are considered too speculative geologically to have the economic considerations applied to them that would enable them to be categorized as Mineral Reserves, and there is no certainty that the PEA will be realized. Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability. The Company has not defined any Mineral Reserves at the Santa Fe Mine project.
Economic Sensitivities
Sensitivity of the project economics to metals prices is shown in Table 1, showing the base case metal prices used for the PEA, as well as a low case, a high case and the spot case.
Table 1: Santa Fe Project 2024 PEA Economics
Low Case | Base Case | High Case | Spot Case (1) | |
Gold Price (US$/oz) | 1,800 | 2,025 | 2,200 | 2,705 |
Silver Price (US$/oz) | 21.50 | 24.20 | 26.3 | 32.60 |
Net Revenue (US$) | 618.6 M | 696.2 M | 756.5 M | 930.8 M |
Pre-Tax NCF(2) (US$) | 65.0 M | 141.6 M | 201.2 M | 373.3 M |
Pre-Tax NPV5(3) (US$) | 21.7 M | 82.2 M | 129.2 M | 265.1 M |
Pre-Tax IRR(4) | 8.5% | 17.4% | 23.9% | 41.0% |
After-Tax NCF(2) (US$) | 47.8 M | 107.7 M | 154.1 M | 288.9 M |
After-Tax NPV5(3) (US$) | 8.7 M | 56.5 M | 93.3 M | 200.0 M |
After-Tax IRR(4) | 6.4% | 14.0% | 19.5% | 34.2% |
Payback Period(5) (years) | 5.1 | 4.2 | 3.8 | 2.9 |
(1) As of December 10, 2024
(2) NCF means net cash flow
(3) NPV5 refers to net present value at 5% discount rate
(4) IRR means internal rate of return
(5) Pre-production capital, excluding sustaining capital
Capital Costs
Capital costs for the project are summarized in Table 2. Capital costs associated with the mining operation were estimated by RESPEC and based on mining by contractor. Pre-stripping costs were based on the operating costs discussed below. Capital costs associated with processing such as crushing, heap leaching and metal recovery, along with support and infrastructure costs associated with laboratory, water and power distribution and general site services were estimated by KCA. Reclamation and closure costs of $12.5 M were estimated by KCA.
Table 2: Project Capital Costs
Pre-Production (US$ M) | LOM Sustaining (US$ M) | |
Mining | 2.5 | 0.8 |
Processing, Support & Infrastructure | 116.0 | 17.0 |
Owner's Costs | 5.3 | 0.0 |
Initial Fills | 0.5 | 0.0 |
Working Capital(1) | 10.7 | 0.0 |
TOTAL(2) | 135.1 | 17.8 |
- Working capital is credited in Year 9
- Values are rounded and may not sum perfectly
Operating Costs
Operating costs for the project are summarized in Table 3. Mining operating costs were estimated by RESPEC and based on estimated anticipated equipment hours and personnel requirements at a 25% markup for contractor rates. The off-road red-dye diesel fuel price in this estimate was assumed to be $0.74/L. All other operating costs were estimated by KCA and based on first principles on certain components where possible, such as reagent and power consumption, along with benchmarking with similar operations for other components, such as labor, maintenance and discretionary expenses
Table 3: Project Operating Costs
LOM Total (US$ M) | Per Tonne Processed ($/t) | |
Mining | 204.2 | 7.36 |
Processing | 138.7 | 5.00 |
Support & Infrastructure | 17.3 | 0.62 |
G&A | 35.8 | 1.29 |
TOTAL(1) | 402.5 | 14.28 |
(1) Values are rounded and may not sum perfectly
Mine Production Schedule
The PEA mine production schedule includes mining of leach material and waste for the Santa Fe, Calvada, Slab, and York deposits. Leach material was assumed to be sent to a centralized crushing plant and then stacked on a leach pad and the waste material was sent to designed waste rock storage facilities (WRSF) or used as partial backfill into the Calvada pit.
Because the Santa Fe Mine is a brown-field project, minimal pre-stripping is required to develop sufficient stockpiles to feed the crusher. The mine production schedule requires 2 months of preproduction which begins in the Santa Fe deposit. The Calvada deposit is started in year 2 and mined concurrently with Santa Fe. Calvada mining is followed by mining of Slab and York deposits.
The process schedule was developed with a ramp up of production from year 1 through year 3 to a full 4.56 million tonnes per year. Table 4 shows the process production schedule.
Table 4: Projected Production Summary
Year | Tonnes Processed (kt) | Gold Grade (g/t) | Silver Grade (g/t) | Gold Produced (koz) | Silver Produced (koz) | Gold Equivalent Produced(1) (koz) |
1 | 3,468 | 0.47 | 4.1 | 30.3 | 88.1 | 31.4 |
2 | 4,517 | 0.58 | 4.6 | 51.4 | 168.9 | 53.4 |
3 | 4,563 | 0.66 | 3.7 | 60.2 | 155.7 | 62.0 |
4 | 4,563 | 0.70 | 3.0 | 60.5 | 124.2 | 62.0 |
5 | 4,563 | 0.73 | 2.5 | 62.0 | 93.5 | 63.1 |
6 | 4,563 | 0.61 | 2.2 | 49.9 | 56.9 | 50.5 |
7 | 1,497 | 0.58 | 2.1 | 20.1 | 23.1 | 20.4 |
8(2) | 0 | 2.3 | 4.2 | 2.3 | ||
TOTAL(3) | 27,731 | 0.63 | 3.3 | 336.7 | 714.7 | 345.2 |
- Equivalent gold calculation is based on base case metal prices
- Residual leaching production only
- Values are rounded and may not sum perfectly
Table 5 shows the key production parameters for the mine and processing units used in the generation of the production and cash flow profiles.
Table 5: Key Mining and Processing Production Parameters
LOM | |
Mining | |
Total Waste Tonnes Mined (Mt) | 42.9 |
Total Processed Tonnes Mined (Mt) | 27.7 |
Total Tonnes Mined (Mt) | 70.6 |
Heap Recovery - Gold | |
Santa Fe Oxide | 71% |
Santa Fe Transition | 49% |
Calvada Oxide | 71% |
Calvada Transition | 45% |
Slab Oxide | 50% |
York Oxide | 60% |
York Transition | 45% |
Heap Recovery - Silver | |
Santa Fe Oxide | 30% |
Santa Fe Transition | 30% |
Calvada Oxide | 13% |
Calvada Transition | 0% |
Slab Oxide | 12% |
York Oxide | 0% |
York Transition | 0% |
Mining and Processing
The mineralized material will be mined by standard open-pit mining methods using a contractor-owned and operated mining fleet consisting of 92-tonne haul trucks and 11.5-m3 loading units and transported to the crushing circuit for processing.
Mineralized material from the Santa Fe, Calvada, Slab and York deposits will be processed by conventional heap leaching methods. The nominal processing rate will be 4.6 million tonnes per annum or 12,500 tonnes per day. Three-stage crushing of the material to 12.7 mm, will be followed by conveyor stacking on to a multi-lift heap leach pad. Dilute sodium cyanide solution will be applied to the heap, with the pregnant gold and silver-bearing solution effluent from the heap being processed in a carbon adsorption-desorption-recovery (ADR) plant. Gold and silver will be produced in the form of doré bars from the on-site smelting process.
Mineral Resource Estimation
The mineral resource estimate ("MRE") was prepared in accordance with the CIM Definition Standards and Canadian National Instrument NI-43-101. The effective date of the MRE prepared by Equity is October 9, 2024. The MRE is shown in Table 6.
Table 6: Project-wide Resources, Santa Fe Mine, Mineral County, Nevada
Notes to Table 6:
- Mineral Resources have an effective date of October 9, 2024. The Mineral Resource Estimate for the Santa Fe Mine was prepared by Trevor Rabb, P.Geo., of Equity Exploration Consultants Ltd., an independent Qualified Person as defined by NI 43-101.
- Mineral Resources are not Mineral Reserves and do not have demonstrated economic viability. Inferred Resources are considered too speculative geologically to have economic considerations applied to them that would enable them to be classified as Mineral Reserves. An Inferred Mineral Resource has a lower level of confidence than that applying to an Indicated Mineral Resource and must not be converted to a Mineral Reserve. It is reasonably expected that most of the Inferred Mineral Resources could be upgraded to Indicated Mineral Resources with continued exploration.
- Resources are reported in accordance with NI43-101 Standards of Disclosure for Mineral Projects (BCSC, 2016) and the CIM Definition Standards for Mineral Resources and Mineral Reserves (CIM, 2014).
- Mineral Resources were estimated for gold, silver, and gold equivalent (Au Eq) using a combination of ordinary kriging and inverse distance cubed within grade shell domains.
- Mineral resources are reported using a cut-off grade of 0.15 g/t Au Eq for oxide resources and 0.60 g/t Au Eq for non-oxide resources. Au Eq for the purpose of cut-off grade and reporting the Mineral Resources is based on the following assumptions gold price of US$1,950/oz gold, silver price of US$23.50/oz silver, and oxide gold recoveries ranging from 45% to 79%, oxide silver recoveries ranging from 10% to 30%, and non-oxide gold and silver recoveries of 71%, mining costs for resource and waste of US$2.50/t, processing cost (oxide) US$3.49/t, processing cost (non-oxide) US$25/t.
- An optimized open-pit shell was used to constrain the Mineral Resource and was generated using Lerchs-Grossman algorithm utilizing the following parameters: gold price of US$1,950/oz gold, silver price of US$23.50/oz silver, and selling costs of US$29.25/oz gold. Mining costs for resource and waste of US$2.50/t, processing cost (oxide) US$3.49/t, processing cost (non-oxide) US$25/t, G&A cost US$1.06/t. Royalties for the Slab, York and Calvada deposits are 1.25%, and maximum pit slope angles of 50 degrees.
- Totals may not sum due to rounding.
Estimation Approach: Lithology and gold and silver bearing domains were modelled using Leapfrog 2024. These domains are mainly defined by logged jasperoid and limestone-breccia lithologies and continuity of gold grades above 0.1 g/t gold. Metallurgical domains for oxide, transition and non-oxide were modelled based on ratio of cyanide leachable gold assay values to fire assay gold values in addition to drillhole logs recording abundance of pyrite and oxidation intensity. Transition material represents approximately 35% of oxide tonnes and comes almost entirely from the Santa Fe deposit. Transition domain material is included in the oxide resource. Domains representing lithology, weathering and mineralization models were assigned to a block model with a block size of 5 m x 5 m x 6 m. Average bulk densities representative of the mineralization and lithology models were assigned to the block model and vary from 2.4 t/m3 to 2.6 t/m3.
Grade capping and outlier restrictions were applied to gold and silver values and interpolation parameters respectively. Top cut values for gold and silver were evaluated for each domain independently prior to compositing to 1.52 m lengths that honor domain boundaries. Estimation was completed using Micromine Origin with Ordinary Kriging (OK) and Inverse Distance cubed (ID3) interpolants. Blocks were classified in accordance with the 2014 CIM Definition Standards. The nominal drillhole spacing for Indicated Mineral Resources is 50 m or less. The nominal drillhole spacing for Inferred Mineral Resources is 100 m or less.
Prospects for eventual economic extraction were evaluated by performing pit optimization using Lerchs-Grossman algorithm with the following parameters: gold price of US$1,950/oz gold, silver price of US$23.50/oz silver, selling costs of US$29.25/oz gold. Mining costs for resource and waste of US$2.50/t, processing cost (oxide) US$3.49/t, processing cost (non-oxide) US$25/t, G&A cost US$1.06/t. Royalties for the Slab, York and Calvada deposits are 1.25%. Maximum pit slope is 50 degrees. Processing recoveries range from 45% to 79% for oxide, silver recoveries range from 10% to 30% for oxide and non-oxide gold and silver recoveries are 71%.
More information regarding the Santa Fe Mine project's MRE update is included in the NI 43-101 Technical Report titled Santa Fe Project Technical Report with an effective date of October 9, 2024, Report Date: November 27, 2024*.
Qualified Persons
The qualified persons are Kenji Umeno, P.Eng. of Kappes, Cassiday & Associates; Thomas Dyer, P.E. of RESPEC; Trevor Rabb, P.Geo. and Darcy Baker, P.Geo. of Equity Exploration Consultants Ltd. each of whom is an independent "Qualified Person" under NI 43-101. A technical report supporting the results disclosed herein will be published within 45 days. The effective date of the technical report will be December 10, 2024.
About Lahontan Gold Corp.
Lahontan Gold Corp. is a Canadian mine development and mineral exploration company that holds, through its US subsidiaries, four top-tier gold and silver exploration properties in the Walker Lane of mining friendly Nevada. Lahontan's flagship property, the 26.4km2 Santa Fe Mine project, had past production of 356,000 ounces of gold and 784,000 ounces of silver between 1988 and 1995 from open pit mines utilizing heap-leach processing (Nevada Division of Minerals, www.ndomdata.com). The Santa Fe Mine has a Canadian National Instrument 43-101 compliant Indicated Mineral Resource of 1,539,000 oz Au Eq(grading 0.99 g/t Au Eq) and an Inferred Mineral Resource of 411,000 oz Au Eq (grading 0.76 g/t Au Eq), all pit constrained (Au Eq is inclusive of recovery, please see Santa Fe Project Technical Report*). For more information, please visit our website: www.lahontangoldcorp.com
* Please see the Santa Fe Project Technical Report, Authors: Trevor Rabb, P. Geo, Darcy Baker, PhD, P. Geo., and Kenji Umeno, P. Eng., Effective Date: October 9, 2024, Report Date: November 27, 2024. The Technical Report is available on the Company's website and SEDAR+.
On behalf of the Board of Directors
Kimberly Ann
Founder, CEO, President, and Director
FOR FURTHER INFORMATION, PLEASE CONTACT:
Lahontan Gold Corp.
Kimberly Ann
Founder, Chief Executive Officer, President, Director
Phone: 1-530-414-4400
Email: Kimberly.ann@lahontangoldcorp.com
Website: www.lahontangoldcorp.com
Cautionary Note Regarding Forward-Looking Statements:
This news release contains "forward-looking statements" and "forward-looking information" (collectively, "forward-looking statements") within the meaning of Canadian and United States securities legislation, including the United States Private Securities Litigation Reform Act of 1995. All statements, other than statements of historical fact, are forward-looking statements. Forward-Looking statements in this news release relate to, among other things: the Company's strategic plans; the results of the PEA; the economic potential and merits of the Project; the estimated amount and grade of mineral resources at the Project; precious metals prices; the PEA representing a viable development option for the Santa Fe Mine project ("the Project"); the timing and particulars of the development phases as identified in the PEA; estimates with respect to LOM, operating costs, sustaining capital costs, capex, AISC, cash costs, LOM production, processing plant throughput, NPV and after-tax IRR, payback period, production capacity and other metrics; the estimated economic returns from the Project; mining methods and extraction techniques; the exploration potential of the Project and its inclusion in future mining studies.
These forward-looking statements reflect the Company's current views with respect to future events and are necessarily based upon several assumptions that, while considered reasonable by the Company, are inherently subject to significant operational, business, economic and regulatory uncertainties and contingencies. These assumptions include, among other things: conditions in general economic and financial markets; tonnage to be mined and processed; grades and recoveries; prices for silver and gold remaining as estimated; currency exchange rates remaining as estimated; reclamation estimates; reliability of the updated MRE and the assumptions upon which it is based; future operating costs; prices for energy inputs, labor, materials, supplies and services (including transportation); the availability of skilled labor and no labor related disruptions at any of the Company's operations; no unplanned delays or interruptions in scheduled production; performance of available laboratory and other related services; availability of funds; all necessary permits, licenses and regulatory approvals for operations are received in a timely manner; the ability to secure and maintain title and ownership to properties and the surface rights necessary for operations; and the Company's ability to comply with environmental, health and safety laws. The foregoing list of assumptions is not exhaustive.
Neither TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release. Except for statements of historical fact, this news release contains certain "forward-looking information" within the meaning of applicable securities law. Forward-looking information is frequently characterized by words such as "plan", "expect", "project", "intend", "believe", "anticipate", "estimate" and other similar words, or statements that certain events or conditions "may" or "will" occur. Forward-looking statements are based on the opinions and estimates at the date the statements are made and are subject to a variety of risks and uncertainties and other factors that could cause actual events or results to differ materially from those anticipated in the forward-looking statements including, but not limited to delays or uncertainties with regulatory approvals, including that of the TSXV. There are uncertainties inherent in forward-looking information, including factors beyond the Company's control. The Company undertakes no obligation to update forward-looking information if circumstances or management's estimates or opinions should change except as required by law. The reader is cautioned not to place undue reliance on forward-looking statements. Additional information identifying risks and uncertainties that could affect financial results is contained in the Company's filings with Canadian securities regulators, which filings are available at www.sedar.com
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