Newcrest Mining Limited - Red Chris Block Cave PFS Confirms Tier 1 Potential

• Confirms Red Chris potential to become a world class, long life mine
• Estimated 17% IRR and C$2.3 billion NPV over an initial 31 year mine life1,2,3
• Projected average 316kozpa gold and 80ktpa copper production from Macro Block 1 in FY29-341,2
• Impressive Block Cave Life-of-Mine All-In Sustaining Cost of -C$180/oz1,2,4
• Initial Ore Reserve estimate of 8.1Moz Au and 2.2Mt Cu5
• Further optimisation underway to assess opportunities proximate to the mining area, incl. East Ridge
• MB1 Feasibility Study expected to be completed in the second half of FY236

Melbourne, Australia--(Newsfile Corp. - October 11, 2021) - Newcrest Mining Limited (ASX: NCM) (TSX: NCM) (PNGX: NCM) is pleased to announce that the Newcrest Board has endorsed the Red Chris Block Cave Pre-Feasibility Study (the Study) and approved its progression to the Feasibility Stage.

The Study confirms Newcrest's original investment thesis of unlocking the underground portion of this Tier 1 deposit by leveraging Newcrest's industry-leading block caving expertise and developing the asset to become a mainstay of Newcrest's portfolio for decades to come.

The Study is the first technical report issued by Newcrest on Red Chris since its acquisition of a 70% interest and operatorship in August 2019. Newcrest intends to release a National Instrument 43-101 (NI 43-101) technical report on Red Chris within 45 days of this release.

Newcrest Managing Director and Chief Executive Officer, Sandeep Biswas, said "The Red Chris Block Cave Pre-Feasibility Study confirms Red Chris's potential to be a long life, low cost mine capable of producing a total of 5.3Moz of gold and 1.7Mt of copper at very attractive cash margins. The study highlights the quality of the deposit with a C$2.3 billion NPV and 17% IRR, but we believe captures only part of the longer term opportunity at Red Chris."

"Since acquiring our 70% interest in Red Chris in August 2019 we have been focused on unlocking its future potential, which we have always believed to be significant, and which is confirmed by the Study. To date, we have had considerable exploration success at Red Chris, including our exciting East Ridge discovery and the existence of multiple high grade pods in the East Zone, both of which are outside the scope of this Study. East Ridge is a new zone of higher grade mineralisation located outside the initial Mineral Resource estimate, with intercepts to date highlighting the potential for resource growth over time. We are currently evaluating 'early mining' options for the high grade pods in the East Zone with the aim of generating additional cash flows prior to the completion of block cave construction."

"Red Chris is already in a Tier 1 mining jurisdiction. We believe that we can transform the asset into a Tier 1 operation through the application of our proven industry-leading block caving technologies and, in doing so, provide attractive financial returns to shareholders as well as multi-generational employment and other opportunities in Tahltan territory and in British Columbia" said Mr Biswas.

Summary of Findings (in 100% terms)1,2,4

• Substantial low-cost gold and copper production growth in a Tier 1 jurisdiction:
  • Total ore production of 406Mt producing 4.9Moz of gold and 1.5Mt of copper
  • Average annual gold production of 158koz and copper production of 48.5kt over Life of Mine (LOM)
  • Average annual gold production of 316koz and copper production of 80kt from Macro Block 1 (MB1) in FY29-34
  • "Negative cost" gold production from the Red Chris Block Cave after accounting for copper credits, with an Average All-In Sustaining Cost (AISC) of C$-180/oz (US$-144/oz)
• Attractive investment returns:
  • Estimated total capital expenditure of C$2.6 billion (US$2.1 billion)7 for the development of Macro Blocks (MB)1, 2 and 3, as well as process plant and infrastructure
  • Internal Rate of Return (IRR)of 17% (real, after tax)
  • ~31 year mine life at an average annual mill throughput rate of 12.8Mtpa
  • Payback of 3.2 years8
  • Net Present Value (NPV) of C$2.3 billion (US$1.8 billion)3
• Initial Ore Reserve estimate for Red Chris of 480Mt @ 0.52g/t Au and 0.45% Cu for 8.1Moz Au and 2.2Mt Cu5
• Considerable exploration success delivered to date, with the discovery of East Ridge and a new zone of higher grade mineralisation south west of the Main Zone, neither of which are included in the initial Mineral Resource and Ore Reserve estimates:
  • High grade intercepts from East Ridge continue to expand the known mineralisation, supporting the potential for further Mineral Resource growth and additional mining fronts
  • Pipeline of early stage targets within the surrounding exploration tenements

The Study builds on Newcrest's experience and success with block cave developments in Australia, with the block cave mining method particularly well suited to the porphyry deposits found at Red Chris and throughout the Golden Triangle region of British Columbia.

The Study underpins an initial Ore Reserve estimate of 8.1Moz Au and 2.2Mt Cu5. The Study and ongoing drilling results indicate significant orebody optionality which will be further tested during the Feasibility Stage. Parallel studies to assess further upside are underway to consider the 'early mining' of high grade pods located in the East Zone with the aim of generating additional cashflows prior to the completion of block cave construction, and accommodating the potential development of the new East Ridge discovery and further resource upside. Newcrest's experience at Cadia shows that orebodies of this type are unique and carry significant embedded optionality, providing opportunities for further value creation for shareholders over the mine life.

The availability of hydro-generated grid power combined with the efficient, low cost, block cave mining method is expected to reduce the project's carbon footprint compared to other mining methods.

The next major project milestone will be the Red Chris Block Cave Feasibility Study for the implementation of the first of three Macro mining Blocks, MB1, which is expected to be completed in the second half of FY236.

Table of Key Study Findings[9]

An indicative summary of key expected milestones is summarised as follows6:

Potential Exploration Upside

The Red Chris porphyry corridor has the potential to host multiple porphyry deposits as demonstrated by Newcrest's recent exploration success, including:

• Extending the known porphyry corridor 800m east of the Mineral Resource estimate
• Discovery of East Ridge, which contains the best drill results to date outside of the East Zone. East Ridge has the potential to increase the resource base and provide additional mining fronts
• A new higher grade zone has been discovered south west of the Main Zone that potentially could provide further mining optionality
• In addition, the Project contains a pipeline of early stage exploration targets within the surrounding exploration tenements and the nearby GJ property

Refer to the section titled "Potential Exploration Growth" on Page 14 for a summary of drill results.

Red Chris Block Cave Feasibility Study

The Red Chris Block Cave Feasibility Study for the implementation of MB1 is expected to be completed in the first half of CY236, with the study scope to include:

• Further optimisation of mill throughput rates, including for different resource growth scenarios
• Detailed block cave footprint design and scheduling focused on access infrastructure and MB1
• Material handling system detailed design, including crusher, conveyor, and associated project infrastructure to support the LOM
• Processing plant optimisation and detailed design at a Feasibility Study level
• Design of the MB1 Tailings Impoundment Area (TIA) to Feasibility Study level and refinement of the TIA design for MB2 and MB3
• Refinement and calibration of water balance and water quality models to enable better decision-making capabilities for the Project, and to mitigate impacts to the receiving environment
• Enhancing water resource stewardship through optimisation of processes to minimise consumption and maximise reuse
• Prioritised detailed design of the Operational Accommodation Complex to allow for early implementation
• Design of the surface infrastructure to Feasibility Study level of detail
• Further analysis and inclusion of next generation mining systems, including Single Pass Cave Establishment (SPCE) and the use of electric power to offset diesel in the mining process
• Finalisation of the contracting and procurement strategy for the Execution stage
• Consolidation of all costs and schedules into a Feasibility Study financial estimate

Project Description1

Newcrest is the operator of the Red Chris Mine (the Mine), which is owned 70% by Newcrest and 30% by Imperial Metals Corporation through an unincorporated joint venture. The Mine is currently an open pit operation that produces approximately 10 to 11Mt of ore per annum.

Newcrest completed an internal Concept Study in CY20 that identified the potential to transition to block cave underground mining and informed the need for an Early Works Program focusing on the construction of an Exploration Decline.

The Study commenced in June 2020 and has recommended transitioning the existing open pit to an underground mine using the block cave mining method. From the Exploration Decline, the Access Decline will be developed to provide personnel and material access to the mining blocks. A conveyor within an independent decline, fed by a jaw-gyratory crusher, would provide ore handling facilities as well as a second egress.

Three macro mining blocks (MB1, 2 and 3) would be mined sequentially using Load Haul Dump machines directly into the underground crusher in MB1 and MB2, while a truck loop would be added in time to haul ore from MB3 to the crusher in MB1. While the mine has been costed using a diesel fleet, the designs also allow for the electrification of the mining fleet as well as the use of automated equipment. Further studies on these applications are being progressed as part of the Feasibility Study.

The Study includes upgrades to the existing processing plant to treat underground ore at a throughput rate of 13.6Mtpa which would require an additional coarse ore stockpile, new SAG mill, additional rougher flotation capacity using StackCell technology, an upgraded regrind circuit, a new cleaner scalping Jameson Cell, and duplication of existing concentrate thickening and filtration equipment.

The Study also investigated an Upside Case to 15Mtpa which would require SAG mill configurations to allow increased throughput at a coarser grind. HydroFloat coarse particle flotation technology will be installed on the rougher tailings to maintain copper and gold recovery as the grind is coarsened.

Two key considerations of the Study have been the handling of tailings produced from mining as well as water stewardship. Studies to accommodate tailings storage have confirmed that tailings from MB1 can be accommodated within the already permitted TIA. For MB2 and MB3 a design has been undertaken to further raise the north and south TIA dams using centreline raises, replace reclaim dams and construct the northeast dam. This would provide an ultimate capacity of 550Mt tailings. Plans for the management of the tailings dam volume which will minimise the need for additional makeup water have also been developed.

Infrastructure to support the underground mine would include an Operational Accommodation Complex and services such as roads, water, sewage and communications. Power would be supplied through the existing transmission line with expansions to on-site facilities.

The Tahltan Nation is the First Nation on whose Territory the Red Chris Mine is situated. Newcrest has developed a strong working relationship with the Tahltan Nation and operates under an Impact, Benefit Co-Management Agreement (IBCA) with the Tahltan Nation. The Agreement includes provisions for royalties, education, training, employment, and contracting opportunities as well as how the two parties will work together on social, environmental and cultural heritage matters.

A range of engagement and consultation occurs regularly with Tahltan Central Government, Tahltan leadership, local communities and the larger Nation. Recently, engagement has been focused on upcoming permitting processes and related assessments.

Newcrest has identified a pathway to obtain the required regulatory approvals for the Project and is actively engaged with the Tahltan Central Government and government agencies in relation to the approvals required to enable execution of the Project in a phased manner.

This underground mine is envisioned to start production from MB1 in FY27 and have a mine life of approximately 30 years providing employment, revenue and other opportunities to Tahltan, British Columbia and Canada6.

Newcrest's initial Mineral Resource estimate was released in March 2021 and was used to support the Study. The Study has defined an initial Probable Ore Reserve of 480Mt @ 0.52 g/t gold and 0.45% copper for 8.1Moz contained gold and 2.2Mt contained copper, including an Open Pit Probable Ore Reserve of 75Mt @ 0.36 g/t gold and 0.42% copper for 0.86Moz contained gold and 0.31Mt contained copper, and an Underground Probable Ore Reserve of 410Mt @ 0.55 g/t gold and 0.45% copper for 7.2Moz contained gold and 1.8Mt contained copper5.

Indicative Production Profile1,10

The Study has defined an indicative consolidated profile utilising the most recent LOM Open Pit production profile for the ongoing Open Pit. The forecasted tonnage profile transitions from a predominantly Open Pit feed in FY26 to an exclusively underground mill feed in FY30 when the Project is envisioned to reach nameplate capacity of 13.6Mtpa. Existing lower grade stockpile material shall be used to supplement mill feed during the transition and to mitigate risk.

Figure 1 Indicative mill feed & grade profile

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Figure 2 Indicative gold, copper and gold equivalent production profile10,11

To view an enhanced version of Figure 2, please visit: https://orders.newsfilecorp.com/files/7614/99286_d29920b964b02b90_004full.jpg

The Study also considered a production rate scenario of 15Mtpa which provides an option to increase the production rate of the block cave above the rate detailed in this document. This option will be further explored and refined during the Feasibility Study.

Underground Mine Development and Sequence1

The Red Chris underground resource extends to a depth of 1,200m below the surface with economic mineralisation typically being low grade and vertical in nature. Given the depth and nature of the mineralisation, the extraction of the resource is best suited to a bulk underground mining method. Block cave mining was selected due to its low operating cost, productivity and suitability to the geometry and conditions of the resource.

The underground mine will be accessed via both an access decline and a conveyor decline. The construction of the Exploration Decline is currently in progress which is expected to provide exploration information for the near mine area as well as provide the opportunity to collect more geological and geotechnical information for the planned caves. Mine access is expected to be completed in FY246.

The mine will consist of three adjoining Macro Blocks (MB1, MB2 & MB3, seen in Figure 4) each mined with a block cave strategy. The extraction level for all macro blocks will be at ~500mRL (~1,000m below surface) and the macro blocks are based on the El Teniente layout with 32m by 20m drawbell spacing. The ore mined during caving of MB1 and MB2 will be moved to a central, 5-tipple crusher with large underground loaders. The crusher is located at the northeast corner of the footprint to facilitate mining of MB1 and MB2. Ore mined during caving of MB3 will be loaded onto 40t trucks and hauled to the crusher. The crusher will then feed the inclined conveyor that will bring the ore to the surface coarse ore stockpile. The sequence of the extraction will be the numerical order of the three macro blocks. This sequence is based on grade and geotechnical considerations. First production from MB1 is expected in FY27 and production is expected to be completed in FY576.

The underground mine ventilation network will consist of three surface connecting raises and the two declines. The conveyor decline, access decline and VR1 (5.5m diameter) will be intakes and VR2 (5.5m diameter) and VR3 (4.5m diameter) will be exhaust. The ventilation network is a pull system that has the fans located on the exhaust raises. The system will have heaters on the intakes to maintain the underground air temperature above freezing. The system was designed to be expanded based on air flow demand, which peaks at approximately 700 m3/s during peak demand.

The mine design also includes the following infrastructure:

• Primary ventilation network including fans, doors and barricades
• Underground workshop, offices, refuge stations
• Dewatering facilities to handle snow melt and spring freshet with a maximum inflow of 1,500m3/h (1 in 50 year event) after the cave reaches the surface
• Utility and fire water distribution
• Electrical power supply and distribution
• Diesel fuel supply and distribution
• Concrete supply and distribution

Figure 3 Mine design looking south

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Figure 4 Top view showing the location of MB1, MB2 and MB3 in relation to other infrastructure

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Indicative Mine Production Profile1,10

Estimated project capital expenditure profile1,4,7,9

Metal Price and Exchange Rate Sensitivity Analysis1,2,4,9

The actual IRR of the Project will vary according to the copper and gold prices realised. Base case assumptions for the Study were a gold price of US$1,500/oz, copper price of US$3.30/lb, and a CAD:USD exchange rate of 0.80.

The table below outlines how the estimated Central Case Project IRR of 17% varies using different price assumptions:

Red Chris Mineral Resource12

The Red Chris Mineral Resource has been updated for mining depletion to 30 June 2021 from that reported in the release titled "Newcrest announces its initial Mineral Resource estimate for Red Chris" dated 31 March 2021. All other assumptions remain unchanged. A summary of material assumptions is included in Appendix 1 JORC Table 1. Mineral Resources are reported inclusive of Ore Reserves. Mineral Resources that are not Ore Reserves do not have demonstrated economic viability.

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Red Chris Ore Reserve13

A summary of material assumptions is provided below and included in Appendix 1 JORC Table 1. There are no material differences between the definitions of Probable Ore Reserves under the 2014 CIM Definition Standards for Mineral Resources and Mineral Reserves and the equivalent definitions in the JORC Code.

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Material Assumptions for Ore Reserves

Red Chris is an operating open pit mining both the East and Main Zone resources. The underground reserves are based on transitioning from open pit to underground mining of the East Zone resource at depth. The Ore Reserves are supported by the Study. The Project is progressing to the Feasibility Stage. If required any adjustments to the Ore Reserves statements will be made at the completion of the Feasibility Study.

Ore Reserve Classification

The Probable Ore Reserve is based on Indicated Mineral Resources and diluting material. Diluting material is either low grade Indicated Mineral Resource or material carrying no grade. No Measured Mineral Resources are stated for this deposit. The resource classification is based on an assessment of geological confidence as a function of geological and mineralisation continuity.

Mining Method

Various mining methods have been considered for the extraction of the East Zone resources. Based on the depth, size, grade and existing site production rate block caving has been deemed the most appropriate mining method by the Study and supported via independent reviews. Ongoing data collection and geotechnical and mining studies will provide ongoing design parameters for the Project.

Ore Processing

Processing of the Red Chris Underground ore stream will be through the Red Chris Concentrator, which will be upgraded to accommodate a combination of larger throughput, increased hardness and higher gold and copper head grades. The upgraded plant will utilise grinding and flotation to produce a copper-gold concentrate using similar unit operations to the current plant. A parallel single-stage SAG (SSAG) grinding circuit will be installed, with a dedicated coarse ore stockpile. Underground ore will be divided between the existing grinding circuit and the new SSAG circuit at a ratio of approximately 60:40. The combined throughput of the upgraded plant will be 13.6 Mtpa. Additional rougher and cleaner flotation capacity, a new regrind circuit, and expanded concentrate dewatering equipment and concentrate load-out facility are also included in the plant upgrade. The application of coarse particle flotation has also been considered for moderate future throughput expansion, and the selection of a SSAG enables further expansion through addition of a ball mill in the future.

Metallurgical testwork, plant design and capital and operating cost estimation were completed to Pre-Feasibility level of accuracy.

Metallurgical testing on a range of underground samples provided data to size the single-stage SAG mill and estimate copper and gold recoveries attributable to underground ore. The anticipated recoveries for underground ore are 81 to 86% for copper and 60 to 75% for gold across the life of the project. Test samples focused mostly on the first 15 years of underground production but included some material from the remainder of the anticipated mine life. The mineralogy of underground samples was found to be more favourable for gold recovery than for current Red Chris open pit operations. Underground ore mineralogy was shown to have some upside for producing high copper concentrate grades due to the presence of enriched copper minerals such as bornite in certain zones in the orebody.

Cut-Off Grade

The Red Chris Ore Reserve employs a value-based cut-off determined from the Net Smelter Return (NSR) value equal to the site operating cost derived from the Study. The NSR calculation takes into account Ore Reserve revenue factors, metallurgical recovery assumptions, transport costs, refining charges, and royalty charges. The site operating costs include mining cost, processing cost, relevant site general & administration costs and relevant sustaining capital costs. This results in shut off values for each block as follows: MB1 = C$22.00/t Milled, MB2 and MB3 C$22.80/t Milled.

Estimation Methodology

Capital cost estimation for the project has been based on a blend of material take-offs and factored quantities with semi-detailed unit costs targeting a Class 4 Capital Cost per Association for the Advancement of Cost Engineering International (AACEI) guidelines and an accuracy range ± 25%.

The Operating Cost estimate has been compiled to an accuracy of +/-25%.

Contingency has been calculated and applied to the Capital Cost estimate. No contingency has been applied to the Operating Cost estimate.

All inputs are in Canadian Dollars.

Material Modifying Factors

All development has mining factors for dilution and mining recovery applied to accurately represent the expected mined tonnes. PCBC™ software is used for cave production scheduling and estimation of grade for material drawn from the block caves. The resource estimate includes internal dilution, and external dilution is included as part of the draw model, with no mining recovery factors applied to the Ore Reserve estimate. Red Chris has no block cave operational data supporting the assumptions within the PCBC™. The parameters are based on deposits and operations of similar properties providing confidence in the applicability. These parameters have been independently reviewed and found to be suitable to support the Ore Reserves.

Other Modifying Factors

Management of water resources was a primary focus of the Study and involved the creation of a water balance model for Study decision-making and to support environmental studies. The results of the water balance indicate that the demands for water for the Block Cave Project, which result from the increase in production rates over current practice, can be achieved by applying water management processes, largely aimed at improving reclaim and recycling of water.

The permitting plan proposes a staged approach to permitting, appropriate to the long-term nature of the Project. The Energy, Mines & Low Carbon Innovation, Environmental Assessment Office and Tahltan Central Government through its representatives have been consulted by Newcrest on the permit applications submitted by Newcrest to date. Newcrest will continue to engage and consult with the Tahltan Central Government and government agencies on the development of the permitting plan and applications for the Project. The timing of obtaining the authorisations remains a risk to the Project and is being actively managed through engagement with the relevant parties. The permitting process has been informed by engagement of independent experts in British Columbian permitting. Obtaining permits to extract the reserves using the block cave mining method has sufficient confidence to support the reserves statement.

The known legal, political, environmental or other risks that could materially affect the potential development of the mineral resources or ore reserves are identified in Sections 3 and 4 of Appendix 1.

Potential Exploration Growth

East Ridge is a new discovery located 300m to the east of East Zone and is located outside of Newcrest's initial Mineral Resource estimate. Drilling to date has demonstrated continuity of the East Ridge zone (>1g/t AuEq[14]) over dimensions of 400m high, 400m long and 125m wide, with the higher grade (>2g/t AuEq14) over 300m high, 300m long and 100m wide. Mineralisation is open to the east and at depth and extends the eastern dimensions of the porphyry corridor. Drilling to define the extent of the East Ridge mineralisation is ongoing and has the potential to deliver additional resource growth over time. Significant intercepts include15:

• RC705
  • 254m @ 1.0g/t Au & 1.1% Cu from 718m
  • including 182m @ 1.3g/t Au & 1.3% Cu from 764m
  • including 80m @ 1.6g/t Au & 1.4% Cu from 852m
• RC688:
  • 344m @ 0.70g/t Au & 0.75% Cu from 776m
  • including 170m @ 1.1g/t Au & 1.1% Cu from 892m
  • including 78m @ 1.1g/t Au & 1.3% Cu from 894m
• RC700:
  • 366m @ 1.1g/t Au & 0.93% Cu from 738m
  • including 226m @ 1.6g/t Au & 1.3% Cu from 774m
  • including 146m @ 2.1g/t Au & 1.6% Cu from 780m

• RC678:
  • 198m @ 0.89g/t Au & 0.83% Cu from 800m
  • including 104m @ 1.5g/t Au & 1.3% Cu from 884m
  • including 76m @ 1.8g/t Au & 1.5% Cu from 908m

Figure 5 Oblique schematic section view of the Red Chris porphyry corridor showing gold distribution. 0.5 g/t Au, 1g/t Au,1g/t AuEq and 2g/t AuEq shell projections generated from the LeapfrogTM model14.

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Step out drilling at East Ridge has highlighted the potential to extend the porphyry corridor to the east of Newcrest's present drilling, with RC701 drilled 700m east of East Ridge returning 206m @ 0.2g/t Au & 0.49% Cu from 1,816m. This intercept is one of the deepest on the property with no drilling between this hole and East Ridge. Follow up drilling is planned to assess this area for additional higher grade zones.

Figure 6 Schematic plan view map of the Red Chris porphyry corridor spanning East Ridge, East Zone, Main Zone and Gully Zone showing drill hole locations (Newcrest & Imperial) and significant Newcrest intercepts15. 0.5 g/t Au,1 g/t Au, 1 g/t AuEq and 2g/t AuEq shell projections generated from a LeapfrogTM model14.

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At the Main Zone, drilling has confirmed the potential for further higher grade mineralisation which could support additional mining fronts, beneath and to the south west of the open pit. The mineralisation is located within the Mineral Resource estimate. Drilling to define the extent and continuity of this higher grade mineralisation is ongoing. Significant Results include15:

• RC666:
  • 194m @ 0.62g/t Au & 0.46% Cu from 476m
  • including 76m @ 1.2g/t Au & 0.75% Cu from 592m
  • including 62m @ 1.4g/t Au & 0.78% Cu from 604m
• RC679:
  • 456m @ 0.37g/t Au & 0.42% Cu from 418m
  • including 98m @ 0.71g/t Au & 1.0% Cu from 440m
• RC683:
  • 300m @ 0.41g/t Au & 0.51% Cu from 260m
  • including 114m @ 0.67g/t Au & 0.85% Cu from 390m
  • including 22m @ 1.1g/t Au & 1.4% Cu from 464m

Figure 7 Long section view map of the Red Chris porphyry corridor showing drill hole locations and gold distribution.

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Further drilling is also planned to assess the Gully Zone for additional higher grade zones in the western extents of the porphyry corridor, while regionally exploration will focus on identifying new porphyry centres within the wider tenement areas.

Appendix 1

JORC Table 1 - Red Chris (70% Newcrest)

Section 1: Sampling Techniques and Data

Section 2: Reporting of Exploration Results

Criteria	Commentary
Mineral tenement and land tenure status	Red Chris comprises 77 mineral tenures including five mining leases and is a joint venture between subsidiaries of Newcrest Mining Limited (70%) and Imperial Metals Corporation (30%). Newcrest Red Chris Mining Limited is the operator of Red Chris. Newcrest Red Chris Mining Limited and the Tahltan Nation (as represented by the Tahltan Central Government, the Tahltan Band and Iskut First Nation) signed an amended and restated IBCA covering Red Chris on 15 August 2019. All obligations with respect to legislative requirements including minimum expenditure are maintained in good standing.
Exploration done by other parties	Conwest Exploration Limited, Great Plains Development Co. of Canada, Silver Standard Mines Ltd, Texasgulf Canada Ltd. (formerly Ecstall Mining Limited), American Bullion Minerals Ltd and bcMetals Corporation conducted exploration in the areas between 1956 and 2006. Imperial Metals Corporation acquired the project in 2007 and completed deeper drilling at the East and Main Zones between 2007 and 2012.
Geology	The Red Chris Project is located in the Stikine terrane of north-western British Columbia, 80 km south of the town of Dease Lake. Late Triassic sedimentary and volcanic rocks of the Stuhini Group host a series of Late Triassic to Early Jurassic 204−198 Ma diorite to quartz monzonite stocks and dykes. Gold and copper mineralisation at Red Chris consists of vein, disseminated and breccia sulphide typical of porphyry-style mineralisation. Mineralisation is hosted by diorite to quartz monzonite stocks and dykes. The main mineral assemblage contains well developed pyrite-chalcopyrite-bornite sulphide mineral assemblages as vein and breccia infill, and disseminations. The main mineralisation event is associated with biotite and potassium feldspar-magnetite wall rock alteration.
Drill hole Information	No new exploration results are reported in this release. A total of 487 drill holes for 287,534 metres drilled have been used to inform the resource estimate. To view an enhanced version of this graphic, please visit: https://orders.newsfilecorp.com/files/7614/99286_d29920b964b02b90_015full.jpg
Data aggregation methods	No new exploration results are reported in this release, therefore this section is not relevant.
Relationship between mineralisation widths and intercept lengths	No new exploration results are reported in this release, therefore this section is not relevant.
Diagrams	As provided above.
Balanced reporting	No new exploration results are reported in this release, therefore this section is not relevant.
Other substantive exploration data	No new exploration results are reported in this release, therefore this section is not relevant.
Further work	Growth drilling is underway within the Main Zone and east of the East Zone including the recent East Ridge discovery.

Section 3: Estimation and Reporting of Mineral Resources

Section 4: Estimation and Reporting of Ore Reserves for the Red Chris Block Cave Study