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MINING PROJECT LIFECYCLE

The 7 Stages of a Mining Project

The 7 Stages of a Mining Project: A Technical Guide to the Mineral Development Lifecycle

Most mining projects start with a target: a geological setting, geochemical anomaly, historic working, or dataset that suggests mineralisation may be present. Only some move through discovery, feasibility, development, production, and closure.

Between the first target and final closure, a project has to pass through a series of technical validations. Each stage asks a different question: is the geology promising, is the data reliable, can the deposit be mined, can it be financed, and can the operation keep producing safely and economically?

Understanding where a project sits on this mine lifecycle shapes every technical and financial decision: what studies to commission, what data to collect, which consultants to engage, and how to communicate project value to investors, boards, and regulators.

This guide is for project owners, exploration companies, investors, and technical teams who need to understand what technical work is usually required before a mineral project can move to the next stage.

The Mining Project Value Curve

The development of a mineral project follows a stage-based trajectory, often referred to in mining finance as the project value curve or project development lifecycle. This curve maps the relationship between time, capital expenditure, and project value across seven stages from the earliest concept through to mine closure.

The curve has a characteristic shape: project value can rise sharply when credible discovery results are reported, often comes under pressure during the capital-intensive feasibility and construction phases, and then may increase again once a mine reaches steady-state production. The curve helps explain why capital allocation, data quality, study timing, and technical review can materially affect project outcomes. At each stage, the risk profile changes.

Early exploration carries the highest geological and technical risk, but also the highest potential reward if a discovery is made. By the time a project reaches feasibility, risk has been reduced through data collection, engineering studies, environmental and social studies, and permitting work, but the capital commitment has grown accordingly.

A useful way to read the lifecycle is to ask what decision each stage supports:

Stage Main Question Typical technical focus Minrom service fit
Pre-Discovery Does field evidence support the concept? Mapping, sampling, geophysics, scout drilling, QAQC Exploration
Discovery Can the deposit support a resource estimate? Mapping, sampling, infill drilling, geological modelling, grade estimation, Mineral Resource Estimate Resource Modelling & GIS
Concept Is the target worth testing? Prospectivity review, license context, desktop study Strategy
Feasibility Can the project be mined economically? Reserve conversion, mine design inputs, hydrogeology, valuation Strategy, Hydrogeology, Resource Modelling & GIS
Development Can the project be built as planned? Water monitoring, early ore characterisation, grade control systems Hydrogeology, Mining Geology, Geometallurgy
Start-Up Does the mine match the model? Grade control, compliance to mine planning, reconciliation, life-of-mine updates Mining Geology, Resource Modelling & GIS
Depletion, mine life extension, and closure planning Extend mine life or close responsibly? Brownfields exploration, closure planning, groundwater monitoring Exploration, Hydrogeology, Strategy

What follows is a technical breakdown of each stage: the typical activities, the key deliverables, the risk and reward profile, and the decisions to be made.

Stage 1: Pre-Discovery

Risk/Reward Profile: High risk, high reward

What This Stage Is

Pre-Discovery is where exploration work begins in earnest. The company has its licence, land access, environmental clearance in hand and is now executing a systematic programme of fieldwork to test the geological concept. No resource-defining discovery has been made yet. This stage ends when a geochemical anomaly, drill result or surface discovery triggers a meaningful change in project understanding.

Key Activities

  • Geological mapping: Systematic field mapping to define lithological units, structural trends, alteration zones, and mineralisation indicators at the project scale.
  • Geochemical sampling: Soil sampling, rock chip sampling, and stream sediment surveys to detect geochemical anomalies associated with mineralisation. Lithogeochemical analysis where bedrock is accessible.
  • Geophysical surveys: Ground and/or airborne geophysical programmes such as magnetics, IP (induced polarisation), gravity, EM (electromagnetic) to detect subsurface signatures consistent with mineralisation or host structures.
  • Trenching: Mechanical excavation across geochemical or geophysical anomalies to expose mineralisation or geology at the surface, allowing direct sampling and geological characterisation.
  • Scout/reconnaissance drilling: The first drill holes in a programme, designed to test the vertical and depth continuity of surface anomalies. These are typically wide-spaced and designed to confirm (or deny) the geological concept rather than to define a resource.

Technical Outputs

The key technical output at this stage is exploration results, including drill intercepts, geochemical anomalies, and geological observations.  Where exploration results are publicly reported, they should be supported by appropriate sampling, QAQC, data validation, and disclosure under the relevant reporting standard. A Mineral Resource cannot be declared until sufficient data has been collected to support geological interpretation and statistical analysis.

QAQC (Quality Assurance and Quality Control) of sampling and assay data is critical at this stage. Poor QAQC, including inadequate standards, blanks, duplicates, or unvalidated laboratory performance, can render data unusable for future resource estimation and represent a significant risk to project credibility.

A common mistake at this stage is treating early sampling as informal data. If standards, blanks, duplicates, chain of custody, and database controls are not handled properly, the same data may be difficult to use later in a resource estimate. That can force repeat drilling or weaken confidence during due diligence.

Risk and Capital Context

Risk remains high, but begins to decline as exploration data accumulates and the geological model is tested. Capital expenditure increases significantly compared to Stage 1, especially once field programmes, geophysics, trenching, and drilling begin. Actual spend varies widely depending on commodity, terrain, drilling depth, access, logistics, and programme scale. For example, a systematic exploration programme across a meaningful tenure typically costs $5–50 million, depending on the commodity, terrain, and drilling requirements.

The pre-discovery dip in the project value curve reflects the reality that capital is being spent without yet demonstrating a viable deposit. For listed companies, this is often the most difficult period for investor communication, since the project needs continued funding before it has generated a reportable resource.A sound geological partner will with effective communication mediate this stage. Robust data carries a project.

Minrom's Role at This Stage

from the start. That includes geological mapping, sampling programme design, geochemical and geophysical data interpretation, drilling support, database management, QAQC, and technical reporting where public disclosure standards apply.

Stage 2: Discovery

Risk/Reward Profile: High to moderate risk, high reward

What This Stage Is

The Discovery stage begins when exploration drilling or surface work confirms the presence of meaningful mineralisation. A discovery hole, or a drill intercept with sufficient grade and width to indicate potential economic significance, can trigger a step-change in project activity and may affect how investors and markets value the project.

The objective of this stage is to move from a discovery intercept to a formally declared, compliant Mineral Resource that is in line with relevant reporting standards. This requires infill drilling to improve geological confidence, metallurgical testwork to understand ore processability, and the application of geostatistical methods to estimate grade and tonnage.

Key Activities

  • Infill drilling: A systematic programme of drill holes designed to increase the density of data within and around the mineralised zone, improving confidence in the geological interpretation and enabling resource classification at Inferred and Indicated levels.
  • Geological modelling and wireframing: Construction of 3D geological models that define the shape, orientation, and boundaries of mineralised domains. This is the foundation on which all resource estimation is built.
  • Variography and geostatistical analysis: Statistical analysis of drilling data to characterise the spatial continuity of grade (concentration of commodity within host rock), a prerequisite for any kriging-based estimation method.
  • Grade estimation: Application of estimation techniques such as ordinary kriging (OK), multiple indicator kriging (MIK), or inverse distance weighting (IDW) to populate a 3D block model with grade and density values. The choice of method depends on the deposit type and the commodity’s grade distribution characteristics.
  • Resource classification: Assigning Inferred, Indicated, or Measured classification to blocks within the model, based on data density, geological continuity, and statistical confidence in accordance with the applicable reporting standard.
  • Metallurgical testwork: Comminution testing, leach or flotation testwork, and deportment studies to establish whether the ore is amenable to conventional processing methods. Results directly influence project economics and deposit value.
  • Geometallurgical modelling: Integrating geological, mineralogical, and metallurgical data into a spatial model of ore variability, allowing mine planners to predict processing performance across different ore domains. Geometallurgical modelling is increasingly used to improve resource confidence and mine planning, especially where ore variability may affect recovery, throughput, reagent use, or processing cost.
  • Mineral Resource Estimate (MRE) preparation: Compilation of a formal Mineral Resource Estimate to JORC 2012, NI 43-101, or SAMREC reporting standards, where applicable, accompanied by a compliant technical report. This is the first formal quantification of the deposit’s value and is typically the trigger for a significant re-rating by capital markets.

Technical Outputs

The primary deliverable of the Discovery stage is a compliant Mineral Resource Estimate, a publicly disclosable statement of the tonnage and grade of mineralisation classified at Inferred, Indicated, or Measured confidence levels. For listed companies, this is a material announcement with significant obligations under ASX, TSX, JSE, and equivalent listing rules. Investors can then use this data to make informed asset allocation decisions.

This is also the stage where weak data management becomes visible. If collar locations, downhole surveys, assays, density data, lithology logs, or QAQC records are incomplete, the resource model may carry avoidable uncertainty.

Risk and Capital Context

Risk declines meaningfully as data accumulates and a resource is defined. However, geological risk persists until the resource has been sufficiently drilled to achieve Indicated or Measured classification. Capital expenditure continues to rise. For example, infill drilling programmes on a significant deposit can cost $20–100 million or more before a resource of sufficient confidence for feasibility studies has been defined. For this reason, the data integrity from prior phases is paramount.

The Discovery stage represents the first point at which the project value curve may rise materially, provided the discovery is supported by credible geological interpretation, clean QAQC data, and a resource model that can withstand technical review.

Minrom's Role at This Stage

This is one of Minrom’s core service areas. Minrom supports Mineral Resource Estimates through geological models, block models, variography, grade estimation, resource classification, and technical reporting aligned with the relevant reporting code. This work helps prepare the project for independent review, investor due diligence, and regulatory scrutiny.

Stage 3: Concept

Risk/Reward Profile: High risk, high reward

What This Stage Is

The Concept stage is the point at which a geological idea becomes a project candidate. A company or individual has identified a target area based on regional mapping, geophysical data, historical records, commodity demand, or geological interpretation and is assessing whether the area justifies further technical and financial commitment.

In practice, this means applying for and being granted prospecting rights, exploration licences, or mineral tenements, depending on the jurisdiction. In South Africa, this is a prospecting right under the Mineral and Petroleum Resources Development Act (MPRDA). In Australia, an Exploration Licence (EL) or Exploration Permit. In Canada, a mineral claim. The terminology varies; the principle is the same: the company acquires the exclusive right to explore a defined area.

Key Activities

  • Regional geological assessment: Review of published geological maps, historical exploration data, government geoscience databases, and academic literature to assess the prospectivity of the target area.
  • Target generation: Identifying specific geological settings or anomalies that warrant investigation e.g. structural corridors, favourable lithological contacts, geophysical anomalies, or historical workings.
  • Licence application and administration: Navigating regulatory requirements, demonstrating technical capability and financial standing, and satisfying social and environmental consultation requirements where applicable.
  • Desktop scoping study: A preliminary assessment of the geological concept, the potential scale of mineralisation, and the market context for the commodity in question.

Technical Outputs

At the Concept stage, outputs are primarily desk-based: geological maps, prospectivity models, and a preliminary work programme. No Mineral Resource can be declared at this stage under reporting standards such as JORC, NI 43-101, or SAMREC, as the project is still a geological concept and has not yet generated the data required to support a resource estimate.

Decision point: before committing to fieldwork, the project owner should be able to explain why the target is geologically plausible, what data is missing, and what first-pass work would test the concept most efficiently.

Risk and Capital Context

This is the highest-risk stage of any mining project. Most early-stage targets do not become producing mines. At this point, the work is still testing whether the geological idea has enough evidence to justify further exploration spend. Capital requirements are usually lower than in later stages, but they vary widely depending on the jurisdiction, commodity, access, licence conditions, fieldwork requirements, and the availability of historical data.

For investors and company boards, the Concept stage requires an appetite for geological risk and a clear understanding that capital deployed here may not produce a discovery or a viable project if the target does not validate the geological concept.

Minrom's Role at This Stage

At this stage, Minrom helps clients screen targets before larger exploration budgets are committed. This can include strategy services such as prospectivity reviews, project potential analysis, project ranking matrices, and market and commodity reviews that test whether the geological concept is strong enough to justify the next phase of work.

Stage 4: Feasibility

Risk/Reward Profile: Lowered risk, medium reward

What This Stage Is

Feasibility is the stage at which a mineral project transitions from geological concept to an engineered mine plan. The objective is to determine whether the deposit can be mined economically and, if so, at what scale, at what cost, and under what conditions. The outputs of this stage form the basis for investment decisions by boards, financiers, and governments.

Feasibility work typically proceeds through different levels of study, including a Pre-Feasibility Study (PFS) and a Definitive Feasibility Study (DFS) or Bankable Feasibility Study (BFS). Study accuracy ranges vary by project, jurisdiction, commodity, and reporting framework, but a DFS or BFS is generally expected to support a final investment decision and project financing.

Key Activities

  • Ore Reserve or Mineral Reserve declaration: Converting Mineral Resources into Ore Reserves or Mineral Reserves, depending on the applicable reporting code. Under JORC, the term is Ore Reserve. Under SAMREC and CIM definitions incorporated into NI 43-101, the term is Mineral Reserve. In all cases, the reserve represents the economically mineable part of the resource after the application of Modifying Factors, including mining, metallurgical, economic, marketing, legal, environmental, social, and governmental factors.
  • Mine design and optimisation: Determining whether the deposit is amenable to open pit, underground, or combined mining methods. Open pit optimisation using tools such as Whittle or Deswik-MSO establishes optimal pit shells at various metal price assumptions. Underground mine design addresses method selection (shrinkage, cut-and-fill, longhole open stoping, block caving, etc.), infrastructure layout, and ventilation requirements.
  • CAPEX estimation: Engineering-level estimates of capital expenditure e.g. mine development, processing plant, tailings storage facility (TSF), water management infrastructure, power supply, and project-wide infrastructure. The quality of the CAPEX estimate affects the credibility of the economic model and the project finance process.
  • OPEX estimation: Operating cost estimation covering mining costs ($/t mined), processing costs ($/t milled), labour cost, and general and administrative (G&A) costs. Unit cost benchmarking against comparable operations provides a credibility check.
  • Economic modelling: NPV and IRR analysis at base-case and sensitivity commodity prices, discount rates, and capital cost assumptions. This output ultimately determines whether a project advances or is shelved.
  • Environmental and social baseline studies: Collection of baseline environmental data (flora, fauna, hydrology, groundwater, air quality, noise) and social baseline surveys, forming the basis for the Environmental Impact Assessment (EIA) and social impact assessment (SIA) required for permitting.
  • Hydrogeological assessment: A dedicated hydrogeological programme is typically required at feasibility stage to characterise the groundwater conditions at the proposed mine site informing dewatering design, water supply, and water management planning.

Technical Outputs

Key deliverables include the Ore Reserve statement (Proved and Probable), the feasibility study report, the environmental baseline report, and project-specific technical studies (geotechnical, hydrogeological, metallurgical). For listed companies, the DFS is typically the most significant technical announcement between discovery and first production.

Risk and Capital Context

By the end of a DFS, technical risk has been substantially reduced relative to earlier stages. The principal remaining risk is execution risk the ability to build the mine on time and on budget. Other residual risk lies in fluctuations in commodity prices and so commodity market forecasts represent an important component of the economic modelling. Capital expenditure on studies alone can be significant ($5–50 million for a major project), and the commitment to project construction, which typically follows, represents the largest capital allocation of the project lifecycle.

This stage also marks the point at which project financing becomes the critical path. Banks, streaming companies, and equity investors will scrutinise the DFS in detail and the quality, completeness, and independence of the underlying technical work directly affect the terms and availability of project finance.

Minrom's Role at This Stage

At feasibility stage, Minrom’s role is strongest where geology, resource confidence, hydrogeology, and project valuation feed into the investment case. This may include techno-economic due diligence, project valuation, geological model updates, resource model inputs, and hydrogeological studies for water management and environmental permitting. Minrom’s technical expertise helps ensure that reported data holds up against independent audits frequently conducted on behalf of potential investors.

Stage 5: Development

Risk/Reward Profile: Lowered risk, medium reward

What This Stage Is

Development is the construction phase of the mining project. A positive investment decision (FID or Final Investment Decision) has been taken, financing has been secured, and the project team is now focused on building the mine infrastructure on time, on budget, and in accordance with approved environmental and social commitments.

This is the most capital-intensive stage of the project lifecycle. For a sizable mine, construction capital can range from hundreds of millions to billions of dollars, deployed over a two- to five-year construction period. The project generates no revenue during this period it is entirely a capital consumer. This is reflected in the project value curve as the development trough, a period where expenditure is high, and value growth is suppressed until production begins.

Key Activities

  • Project financing: Securing the capital structure required to fund construction, typically a combination of equity (share issuance), debt (project finance, reserve-based lending), and alternative structures such as streaming agreements or royalty sales. For major projects, this often involves syndicates of international banks and requires an independent technical expert (ITE) review of the DFS.
  • Engineering, Procurement, and Construction Management (EPCM): The EPCM contractor manages the detailed engineering, procurement of equipment and materials, and oversight of construction contractors. The quality of EPCM delivery is a primary determinant of whether the project is delivered on schedule and on budget.
  • Permitting and regulatory approvals: Environmental authorisations, water use licences, mining licences, and other regulatory approvals must be in place before and during construction. Permitting timelines vary significantly by jurisdiction and are among the most underestimated risks in mining development projects.
  • Construction: Physical mine development such as portal development or box-cut, plant foundation and erection, tailings facility construction, power and water infrastructure, access roads, and accommodation. Commissioning activities begin as systems come online.
  • Workforce recruitment and training: Building the operational team in preparation for start-up. For remote projects in developing countries, this includes significant investment in local skills development and community employment.
  • Mining-Induced Displacement and Resettlement (MIDP): People within the mining development area need to be relocated and, in many instances, compensated within the framework of local laws. To avoid project delays, mining companies are required to develop a comprehensive Resettlement Action Plan (RAP) for addressing the affected parties.

Technical Outputs

Key deliverables during the Development stage include construction progress reports, commissioning plans, updated mine plans, and environmental and social monitoring reports. Financial reporting focuses on capital expenditure tracking against the DFS budget.

Risk and Capital Context

By the Development stage, geological and technical risk has been substantially de-risked. The primary remaining risks are execution risk (construction schedule and cost overruns are extremely common in mining), commodity price risk during the construction period, and political/regulatory risk in the relevant jurisdiction.

Minrom's Role at This Stage

During Development, geological and hydrogeological work still matters. Minrom can support water management design, environmental and groundwater monitoring, geological characterisation of early ore zones, grade control setup, and reconciliation systems before the mine moves into production. Independent technical review and due diligence support may also be relevant where project financiers, investors, or acquirers require a geological or resource-focused assessment.

Stage 6: Start-Up

Risk/Reward Profile: Value realisation begins, operational risk remains high

What This Stage Is

Start-Up is the transition from construction to production. The processing plant is commissioned, the first ore is introduced to the circuit, and the operation begins the ramp-up to nameplate capacity. This stage ends when the mine reaches steady-state, design-level production at which point the asset begins to demonstrate its operating value.

Start-Up is technically demanding and operationally high-risk. Processing plant commissioning reveals design issues and equipment failures that were not apparent during construction. Mining rates and ore feed must be optimised for the plant. Grade control systems are established and tested against the resource model. It is important to stress that the mining and processing techniques were developed from models, but in reality, the variation in geology can be more complex and methodologies implemented must be fine-tuned and optimised accordingly.

Key Activities

  • Processing plant commissioning: Testing of all plant systems, crushing, milling, classification, flotation, leaching, gravity circuits, tailings management against design performance criteria. Typically progresses through dry commissioning (mechanical testing), wet commissioning (water testing), and production commissioning (ore feed).
  • Grade control geology: Establishing the grade control programme, that is, the short-interval geological and sampling system that guides mining decisions on a blast-by-blast or bench-by-bench basis. Effective grade control is one of the most significant drivers of mine profitability and is often the area where operational geology adds the most direct value.
  • Resource model reconciliation: Comparing the grades predicted by the resource model against the grades actually mined and processed. Reconciliation, tracking from resource estimate to reserve to mine to mill, is both a performance measure and a quality check. Systematic reconciliation failures (mine calling higher or lower than the model) require geological investigation and may trigger a model update. The additional data collected during mining allows for greater accuracy in updated models.
  • Short-interval control (SIC): Implementing systems for monitoring and adjusting mining and processing performance at short time intervals (shift, day, week) to optimise throughput, recovery, and cost.
  • Life-of-mine (LOM) plan updates: Revising the mine plan based on actual performance data from the first months of production, adjusting mining rates, processing throughput, cost assumptions, and reserve utilisation to reflect operational reality.

Technical Outputs

Key outputs at this stage include production reconciliation reports, updated LOM plans, and revised resource and reserve statements. Listed companies are required to report production quarterly and mineral resources and reserves at least annually.

Risk and Capital Context

Project risk at Start-Up is primarily operational. Geological risk has been substantially reduced. The primary uncertainties are plant performance (can it achieve design throughput and recovery?), grade control accuracy (is ore being selected and dilution controlled effectively?), and commodity price. Once steady-state production is achieved, the project generates the cash flows required to service its debt and return capital to shareholders.

Minrom's Role at This Stage

Mining Geology services — grade control, geological block model updates, ore reconciliation, and short-term mine planning support are directly relevant at this stage. Resource Modelling & GIS provides updated block models and reconciliation analysis as operational data accumulates.

Stage 7: Depletion, Mine Life Extension, and Closure Planning

Risk/Reward Profile: Full value, declining

What This Stage Is

Depletion is the final stage of the mining project lifecycle. The reserve base is approaching exhaustion, and the operation must decide whether to invest in mine life extension, plan for closure, or do both in parallel.

This stage demands both geological intelligence and strategic planning. Some mines approaching end-of-life may still have extension potential through brownfields exploration, deeper drilling, satellite deposits, or reassessment of marginal zones. Others need a disciplined transition into closure, rehabilitation, and long-term monitoring.

Key Activities

  • Brownfields exploration: Systematic exploration of strike and depth extensions to the known ore body, adjacent tenements, and satellite deposits. Brownfields exploration operates in an environment of known geology and infrastructure, reducing risk relative to Greenfields projects and offering the most cost-effective path to resource extension. Geological activities such as scout drilling from the pre-discovery phase are replicated in adjacent brownfields areas.
  • Cut-off grade reassessment: As grades decline toward mine depletion, cut-off grades may need to be reassessed to ensure that marginal ore is correctly classified and included or excluded from the mine plan. Errors here directly affect mine life calculations and reported reserves.
  • Mine life extension studies: A structured technical assessment of the potential to extend the mine’s productive life, including resource extension drilling results, updated economic analysis, and feasibility-level assessment of accessing deeper or lower-grade zones.
  • Mine closure planning: Regulatory requirements in most jurisdictions require a detailed Mine Closure Plan (MCP) to be in place well before the end of mine life. This plan covers rehabilitation obligations: landform design, revegetation, groundwater monitoring, infrastructure decommissioning, and the financial provision (bonding) required to fund closure.
  • Concurrent rehabilitation: Best practice requires rehabilitation to proceed concurrently with mining progressively rehabilitating mined-out areas rather than leaving all rehabilitation to the closure phase. This reduces closure liability and improves environmental performance.
  • Final Mineral Resource and Ore Reserve reconciliation: At mine closure, a final reconciliation of the resource model against total mined production provides data for ongoing model improvement and constitutes the definitive technical record of the project.

Technical Outputs

Key deliverables include resource extension drilling results and updated MREs, the Mine Closure Plan, concurrent rehabilitation reports, and the final Mineral Resource and Ore Reserve statement.

Risk and Capital Context

At Depletion, geological risk returns; specifically, the risk that insufficient new mineralisation is found to justify continued operation. Capital allocation decisions at this stage, whether to invest in brownfields exploration or manage toward planned closure, are among the most consequential a mining company will make.

Minrom's Role at This Stage

At this stage, Minrom’s strategy services can support brownfields target generation, resource-extension drilling, model updates, final reconciliation, groundwater monitoring, closure-related hydrogeology, life-of-mine extension studies, and project valuation at closure.

Why Technical Discipline Matters at Every Stage

The seven stages described above are not simply administrative categories; they are decision gates, each requiring a specific body of technical work before the next stage can begin responsibly.

The most common causes of mining project failure are not geological. They are:

  • Advancing stages without sufficient data. Declaring a DFS-level project on PFS-quality data, or committing to construction on an under-drilled resource, amplifies execution risk and increases the probability of costly revision.
  • Poor QAQC from the start. Data quality problems identified at the Feasibility stage often trace back to QAQC failures in Pre-Discovery drilling. Addressing them retrospectively is expensive and sometimes impossible. The cost of having to repeat phases ultimately results in projects being abandoned.
  • Under-estimating the interaction between disciplines. Resource estimation that ignores metallurgical variability and mine planning that doesn’t account for hydrogeological constraints. Grade control that isn’t reconciled back to the block model. These failures are preventable when geology, engineering, and hydrology share a common technical foundation.

Independent technical review is most useful when the project is about to move into a more expensive stage. These are the points where better data, clearer assumptions, and stronger technical controls can change the quality of the decision being made.

Where Is Your Project in the Lifecycle?

Whether you are acquiring your first prospecting rights or managing reconciliation at an operating mine, the technical requirements of each stage are specific, and the decisions made at one stage have consequences for every stage that follows.

Minrom’s geological, engineering, hydrogeological, and GIS teams work across every phase of the mining project lifecycle, from first-pass exploration targeting through to resource definition, feasibility inputs, and independent technical review.

Discuss your project with our team.

The seven stages of a mining project, using Minrom’s lifecycle framework, are: (1) concept, (2) pre-discovery, (3) discovery, (4) feasibility, (5) development, (6) start-up, and (7) depletion, mine life extension, and closure planning. Each stage has a distinct risk profile, capital requirement, and set of technical deliverables. Risk is highest in early exploration and generally decreases as geological, engineering, environmental, and economic data accumulates.

A Mineral Resource is an estimate of the tonnage and grade of mineralisation with reasonable prospects of eventual economic extraction. An Ore Reserve is the economically mineable portion of a Mineral Resource; it has been subjected to Modifying Factors (mining, metallurgical, economic, environmental, social, legal) that confirm it can be extracted at a profit under stated assumptions. Ore Reserves are a more conservative and more stringent classification than Mineral Resources. Both are governed by reporting standards including JORC 2012, NI 43-101, and SAMREC.

A Definitive Feasibility Study (DFS), also called a Bankable Feasibility Study (BFS), is a comprehensive technical and economic assessment of a mineral project at a level of accuracy sufficient to support a Final Investment Decision and project financing. A DFS typically achieves ±10–15% accuracy on capital and operating cost estimates. It covers mine design, process plant design, infrastructure, environmental permitting, financial modelling (NPV, IRR), and risk assessment. The level of accuracy depends on the project, commodity, jurisdiction, and study framework.

The JORC Code (Joint Ore Reserves Committee Code) is the Australasian standard for public reporting of Exploration Results, Mineral Resources, and Ore Reserves. It applies to companies listed on the Australian Securities Exchange (ASX) and others that choose to report to the JORC standard. The current version is JORC 2012. Equivalent standards in other jurisdictions include NI 43-101 (Canada), SAMREC (South Africa), and PERC (Europe).

Geometallurgical modelling is the integration of geological, mineralogical, and metallurgical data into a spatial model that predicts how ore will behave during processing across different domains of the deposit. It enables mine planners to anticipate variability in recovery, throughput, and reagent consumption and to schedule ore types that optimise plant performance and project economics.

Grade control is the short-interval geological and sampling programme that guides mining decisions, determining which material to send to the processing plant and which to stockpile or send to waste. Effective grade control maximises ore recovery, minimises dilution, and ensures the mined grade matches or exceeds the grade predicted by the resource model. It is typically managed by the mine's operational geology team, often in collaboration with independent geological consultants.

Mine reconciliation is the systematic comparison of predicted performance (from the resource and reserve model) with actual performance (from mining and processing records). It tracks the flow of ore from the block model through to the mill and final product, identifying discrepancies at each stage. Reconciliation data is used to validate the resource model, improve grade control practices, and refine life-of-mine plans.

Thorough geometallurgical modelling is vital in ensuring the sustainability of a mining operation. Understanding the spatial variance of ore in terms of its metallurgical characteristics allows for effective mine planning and ensures consistent feed grades and output yields at processing plants.

Author

Oscar van Antwerpen