SolGold PLC Announces SolGold Announces Positive PEA Study Results

BISHOPSGATE, May 20, 2019 - SolGold plc (LSE & TSX: SOLG) is pleased to announce the release of its Preliminary Economic Assessment ("PEA") for the Alpala Copper-Gold-Silver Deposit, Cascabel Project Northern Ecuador. SolGold holds an 85% registered and beneficial interest in ENSA (Exploraciones Novomining S.A.) which holds 100% of the Cascabel Project (see "ownership" below).

Key aspects and findings from this study are summarised below.

HIGHLIGHTS

References to figures and tables relate to the version visible in PDF format by clicking the link below:

http://www.rns-pdf.londonstockexchange.com/rns/4799Z_1-2019-5-19.pdf

Commenting on the findings of the PEA, SolGold CEO Mr Nick Mather said: "TheSolGold Board is excited by the opportunity demonstrated for the AlpalaProject, and that it continues to grow. The unusually low operating costsmodelled are due to the relatively soft, fractured nature of the ore, resultingin enhanced caveability, a high degree of fragmentation in the cave and ease ofcrushing and millability, combined with low hydroelectric (consumption andunit) costs. The overall scale efficiencies also assist in the delivery ofmodelled low operating costs.

The lowstart-up capex of $2.4-$2.8Bn, high net present value (NPV) range, of $4.1 €‘$4.5Bn at an 8% discount (well in excess of the global cost of capital for aproject of this nature) signifies outstanding financial metrics for a projectof this nature and outstanding modelled internal rates of return of 24.8-26.5%presents an outstanding value proposition for SolGold shareholders. SolGoldlooks forward to delivery of the same blueprint across its 12 other whollyowned projects throughout Ecuador.

Thestudy team has been careful to separately identify start-up capital costs($2.4Bn - $2.8Bn) and ongoing sustaining capital costs ($7.5Bn - $7.8Bn overthe life of mine) and has differentiated this from operating costs.

Thevertically extensive nature of the cave configurations, the high modelledresource tonnages and production rates also contribute to the high capitalefficiency and returns, low mining costs, and low overall costs of the project.

Metallurgicalwork, which is ongoing, indicates that gold contents in the pyrite concentratewill require additional investigation to identify an efficient recoverystrategy, but this represents only 13% of the contained gold in MRE#2 and lessthan 4% of the contained metal value in the base case. Metal values ofUS$3.30/lb copper and US$1300 gold used in the study.

Additionalmetallurgical work is expected to identify solutions for recovery of gold andcopper in the pyrite concentrate along with a sulphuric acid product.

Highcopper 28.2%, gold 22.1 g/t and 65.7g/t silver contents in sales concentratesover the first 15 years are expected to attract premium values. The highquality of the concentrates and the relatively low arsenic contents incomparison to a number of other major producers are expected to deliver a salespremium for SolGold's concentrates and relatively low tolling and refiningcharges.

Inaddition, Alpala's location contributes significantly to the low capitalexpenditures estimated (capex). Situated at a relatively low elevation, Alpalais near to available water and is also close to key transport at landmarks suchas the port of Esmeraldas, Quito International Airport and the regional city ofIbarra, all accessible via sealed roads and highways. The capex outlined alsoincludes an amount of 11% of start-up capex for Engineering Procurement andConstruction Management. SolGold will utilise internal management as much aspossible to reduce costs, improve work quality and expedite delivery by buildinga strong in-house team.

Overthe period to the end of 2019 when SolGold aims to complete the prefeasibilitystudy, activities will focus on exploration, a new MRE#3, metallurgy andprocess design, investigation of further tailing disposal options andincorporation of further geotechnical and hydrogeological data into thePrefeasibility Study basis. SolGold will also commence permitting and fiscaldiscussions with the Ecuadorean Government and financial discussions with thirdparty financiers for SolGold's share of the project costs following completionof the Feasibility Study."

Summary

The PEA study was prepared by independent consultants Wood plc in the role of Lead Consultants with direct responsibility for the Minerals Processing, Materials Handling and Project Infrastructure components of the study, and the participation of SRK Consulting (UK) Limited (Resource Estimation), SRK Exploration Services Limited (Geology), Mining Plus Pty Ltd (Geotechnical, Hydrogeology and Mine Planning), Knight Píesold Ltd (Environmental and Community), and Ernst and Young (Economic Analysis).

The PEA addresses findings based on the resource as defined in MRE #2 announced November 2018, of 8.4 Mt Cu and 19.4 Moz Au in the Indicated category & 2.5 Mt Cu and 3.8 Moz Au in the Inferred category with the MRE across both Indicated and Inferred classifications equating to a current 2.95 Bt @ 0.52% CuEq (15.4 Mt CuEq) containing 10.9 Mt Cu and 23.2 Moz Au at 0.2% CuEq cut-off, 79% of which is in the Indicated category (by gold and copper metal content).

Table 1: MRE 2 Resource Table

Additional drilling since the data cut off has not yet been modelled for MRE#3 and exploration activities on site with 10 drill rigs continues to define extensions to the mineralised envelope at Alpala, especially to the north towards Trivinio, Moran and Alpala north west at depth.

An additional MRE#3 is expected to form (along with further metallurgy, geotechnical and materials handling and storage studies) the basis for the Pre-Feasibility Study ("PFS") by the end of December 2019.

The Production Rate Scenario (see Mine Production Cases table above) proposed as the base case is Case 2b: 50 Mt/a Fast ramp-up.

Economic Summary and Sensitivity Analysis

The preliminary economic assessment is preliminary in nature, it includes inferred Mineral Resources Ltd. 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 preliminary economic assessment will be realised.

Note: A discounted cash flow model was developed to evaluate the economics for the Project on a 100% project ownership basis.

Mine Production Scenarios

Concept level assessment of mining methods carried out as part of the PEA suggests that mining at Alpala should be conducted using low-cost underground mass mining methods such as Block Caving or Panel Caving for higher grade sections of the ore body.

Based on the November 2018 MRE #2 resource base, geological characteristics of the Alpala orebody, grade distribution, geotechnical and hydrogeological characterisation, size of the mining footprint, and other technical and economic considerations, several Block Cave mine production cases were pre-selected and assessed as part of the PEA.

These scenarios attempt to provide environmentally sound project development options aimed at optimising the economics of the project while maximising extraction of the Alpala resource.

Based on MRE #2 and as reported earlier in the announcement, the Indicated resource at the 0.2% CuEq cut-off grade is approximately 2,050Mt averaging 0.60% CuEq, and the Inferred resource is approx. 900Mt @ 0.35% CuEq. Accordingly, the Resources scheduled in the PEA block cave designs corresponds to about 89% of the Indicated Mineral Resource and some 61% of the Inferred Mineral Resource.

Mineral Processing

The dominant copper mineral at Alpala is chalcopyrite (33% copper content), with lesser amounts of bornite (63% copper content). In most cases the gold is included as a particulate form in chalcopyrite, bornite or pyrite.

Metallurgical test work for the PEA was conducted based on 20 samples averaging 53kg per sample, obtained from 480m of NQ sized half core from five drillholes representing the major geological domain groups from preliminary geometallurgical models.

The testwork program for the PEA was conducted at ALS Metallurgical Laboratories in Kamloops, Canada. The laboratory program consisted of sample preparation and composite formation, comminution tests including SMC, Bond Ball Mill Work Index (BWI) and Bond Abrasion Index (AI), flotation optimisation and locked cycle tests on specified composites and rougher concentrate kinetic tests.

The copper concentrator and gold recovery circuit proposed for Alpala is based on two parallel lines with one line built for Phase 1 (ramp up to 50% nameplate capacity) and a second line to reach 100% nameplate capacity in the case of the 40 and 50Mtpa mine production scenarios. Three parallel modules are considered for the 60Mtpa scenario.

Metallurgical recoveries to the chalcopyrite copper concentrate for the first 30 years of operation are estimated to range between 93.9% and 87.1% for copper and between 85.4% (high grade) and 49.4% (low grade) for gold (50Mtpa staged ramp-up) depending on mill feed grades.

Further investigations are underway to further increase copper and gold recoveries to the copper concentrate and improve gold recoveries from the pyrite concentrate.

Infrastructure

The Alpala deposit is favourably located at low altitude (600-1,800masl), with easy access via a sealed highway from the regional capital (Ibarra) some 90km by road to the south, and in proximity to water and high voltage, predominantly hydroelectric sourced power supply. The deep-water port at Esmeraldas is located some 180 km to the west of the project site.

Unlike some other Tier 1 porphyry copper-gold deposits which are located in the high Andes in remote locations and at very high altitude, the low elevation and mild climate year-round in the Alpala area allows exploration activities and mining operations to be conducted throughout the year.

Benefiting from these natural advantages is expected to allow significantly reduced infrastructure requirements at Alpala in comparison to many of its peers.

The likely infrastructure (on-site and off-site) requirements considered in the PEA study, include the following:

Marketing

Metallurgical testwork carried out to date indicates that the main product from the Cascabel project will be a high-quality copper-gold-silver concentrate with no penalty impurities and medium to high copper and gold grades plus additional silver credits, making it a desirable product for copper smelters worldwide.

Average concentrate grades over the life-of-mine are currently estimated at 26% copper, 13.2g/t gold and 49.2g/t silver. Average figures over the first 15 years of the operation are estimated at 28.2% copper, 22.1g/t gold and 65.7g/t silver. The relatively high valuable metal contents and low deleterious elements such as arsenic is expected to attract premium sales values and keep treatment and refining charges low.

Environmental and community

SolGold has conducted environmental studies in the project area using qualified practitioners for a number of years, which contributes to a defensible baseline data set. An experienced project team is leading meaningful social engagement programs to support appropriate Corporate Social Responsibility programs as part of future studies and any proposed development plans.

Current exploration activity is fully permitted and in good standing. Mine development will require the successful conclusion of an Environmental Impact Assessment and permitting from the Ministry of Environment. This is a recognised process with successful precedent in Ecuador. There are no known environmental issues that could materially impact the ability of SolGold to extract the Mineral Resources Ltd. at the Cascabel Project. Base line environmental data has been collected at Alpala for approximately four years.

Capital and operating cost estimate

Capital cost estimates for the cases assessed during the PEA range from US$2.45B to US$2.85B for the pre-production Capex and from US$7.5B to US$7.8B for the post-implementation and sustaining Capex.

The operating cost over the life of the project is estimated at between US$25.5B and US$25.9B depending on the production scenario. Unit C1* operating cost over the life of the project is estimated at US$0.90/lb copper after gold and silver credits (50Mtpa, fast ramp-up). C1* Production Cost (average for the first 25 years, 50Mtpa Fast ramp-up case) - Estimated at US$0.23 per payable pound of Cu after gold and silver credits.

The capital cost estimate has been developed in accordance with Wood's capital cost estimating procedure (PRJ-340-05) for a Conceptual study to meet the requirements of the National Instrument NI 43-101 for a Preliminary Economic Assessment (PEA) study and is consistent with "AACE International" cost estimating guidelines for a Class 5 estimate for the Process Industries.

The estimate accuracy range of -/+ 35% for cost inputs is defined by the level of project definition. The accuracy of the total cost estimate has been assessed to comply with the above guidelines.

Due to the long mine life, it is not expected that significant salvage values at the end of the ultimate mining resource life will be gained.

Note: * C1 Includes all siteoperating costs, concentrate shipping costs, smelting and refining charges,etc, but excludes royalty payments, taxes and profit share.

Economic analysis

A discounted cash flow model was developed by Ernst & Young from the commencement date of the project to evaluate the economics for the Project on a 100% project ownership basis.

The economic modelling was done on a post-tax basis and the results indicate an after-tax Net Present Value (NPV) from US$4.1 Bn to US$4.5 Bn based on a copper price of US$3.30 /lb and gold price of US$1300 /lb at an 8% discount rate for the four scheduled cases. The projects' Internal Rate of Return (IRR) is estimated at between 24.8% and 26.5%, with payback periods after production commencement from 3.5 to 3.8 years.

The figure below shows the annual and cumulative cashflows for Case 2b: 50 Mt/a Fast ramp-up case.

Sensitivity analysis was conducted on the copper and gold prices as outlined in the range in the NPV output.

The model assumes a corporate tax rate of 25% (current Ecuadorian corporate tax rate), a profit share of 15% (Labour Tax) on earnings before tax (12% government, 3% employee), a government royalty of 5% to 8% depending on the type of mineral, and a straight-line depreciation rate of 10%.

The model also includes a sovereign adjustment levy where project contributions to government (royalties, income tax, government profit share) fall below 50% of cumulative economic project benefits - noting under the scenarios considered no sovereign adjustments are required.

The basis for the Economic Analysis is from the commencement date of the project, and therefore, it does not include sunk costs which will have been incurred prior to approval to proceed to project implementation.

Ownership

SolGold holds an 85% registered and beneficial interest in ENSA (Exploraciones Novomining S.A.) which holds 100% of the Cascabel Project. Under Ecuadorean law shareholders do not own an interest in the assets of a company and accordingly the project economics are presented on a 100% basis.

SolGold is funding the completion of a Feasibility Study and the minority 15% shareholder Cornerstone Capital Resources Inc. S.A. (CGP) in ENSA, is obliged to repay its 15% share of SolGold costs (from the time of acquiring its 85% interest) from, amongst other things, their net 15% share of the proceeds of the project. Upon completion of the Feasibility Study, CGP may then elect to contribute to the development costs and maintain at least 10% interest subject to the various provisions of the Earn - in agreement (dated April 2012) and the Term Sheet (dated February 2013 and varied in February 2014) or dilute to a 0.5% net smelter return which SolGold may acquire for $3.5M at any time. There is also a 2% net smelter return which was granted to Santa Barbara Resources Ltd. that SolGold may acquire for a total of $4M.

Risks and opportunities

Project risks and opportunities identified by the consulting team at this PEA stage of the Cascabel project include:

Conclusion and Recommendations

Based on the current mineral resource base (MRE #2) and other geological, mining, metallurgical, environmental, logistical, and financial information available for the study, this preliminary economic assessment (PEA) suggests that the Alpala copper-gold-silver deposit has the potential to support a large-scale, low-cost underground Block Cave mining operation and associated processing and project infrastructure facilities, capable of sustaining commercial production over a mine life in excess of 55 years depending on the production scenario finally adopted.

Additional information and preparatory work required for subsequent study stages include geotechnical drilling and testing, sterilisation drilling in areas currently identified for the location of infrastructure and project facilities, more advanced metallurgical testwork, additional environmental and community baseline surveys, infrastructure and logistics trade-off studies and others, much of which is currently in progress.

Based on the findings from this PEA study It is recommended that given the strong fundamentals the Cascabel Project - Alpala Deposit progresses to Pre-feasibility study stage.

Market Abuse Regulation (MAR) Disclosure

Certain information contained in this announcement would have been deemed inside information for the purposes of Article 7 of the Regulation (EU) No 596/2014 until the release of this announcement.

Qualified Person:

Technical and scientific information in this report has been reviewed by Mr Jason Ward ((CP) B.Sc. Geol.), the Chief Geologist of the Company. Mr Ward is a Fellow of the Australasian Institute of Mining and Metallurgy, holds the designation FAusIMM (CP), and has in excess of 20 years' experience in mineral exploration and is a Qualified Person for the purposes of the relevant LSE and TSX Rules. Mr Ward consents to the inclusion of the information in the form and context in which it appears.

By order of the Board

Karl Schlobohm

Company Secretary

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The Company recognises that the term "World Class" is subjective and for the purpose of the Company's projects the Company considers the drilling results at the growing Alpala Porphyry Copper Gold Deposit at its Cascabel Project to represent intersections of a "World Class" deposit. The Company considers that "World Class" deposits are rare, very large, long life, low cost, and are responsible for approximately half of total global metals production.

"World Class" deposits are generally accepted as deposits of a size and quality that create multiple expansion opportunities, and have or are likely to demonstrate robust economics that ensure development irrespective of position within the global commodity cycles, or whether or not the deposit has been fully drilled out, or a feasibility study completed.

Standards drawn from industry experts (1) Singer and Menzie, 2010; (2) Schodde, 2006; (3) Schodde and Hronsky, 2006; (4) Singer, 1995; (5) Laznicka, 2010) have characterised "World Class" deposits at prevailing commodity prices. The relevant criteria for "World Class" deposits, adjusted to current long run commodity prices, are considered to be those holding or likely to hold more than 5 million tonnes of copper and/or more than 6 million ounces of gold with a modelled net present value of greater than USD 1 Billion.

The Company and its external consultants prepared an initial mineral resource estimate at the Cascabel Project in December 2017. Results are summarised inTable B attached.

The Mineral Resource Estimate was completed from 53,616m of drilling, approximately 84% of 63,500m metres drilled as of mid-December 2017, the cut-off date for the maiden resource calculation. There remains strong potential for further growth from more recent drilling results, and continue rapid growth of the deposit.

Any development or mining potential for the project remains speculative.

Drill hole intercepts have been updated to reflect current commodity prices, using a data aggregation method, defined by copper equivalent cut-off grades and reported with up to 10m internal dilution, excluding bridging to a single sample. Copper equivalent grades are calculated using a gold conversion factor of 0.63, determined using an updated copper price of USD3.00/pound and an updated gold price of USD1300/ounce. True widths of down hole intersections are estimated to be approximately 25-70%.

On the basis of the drilling results to date and the results of the Alpala Maiden Mineral Resource Estimate, the reference to the Cascabel Project as "World Class" (or "Tier 1") is considered to be appropriate. Examples of global copper and gold discoveries since 2006 that are generally considered to be "World Class" are summarised in TableA.

References cited in the text:

Table A: Tier 1 global copper and gold discoveries since 2006. This table does not purport to be exhaustive exclusive or definitive.

Table B: Alpala Mineral Resource Estimate updated effective 16 November 2018.

Notes:

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SOURCE: SolGold plc