Tungsten Exploration and Project Support in Kazakhstan

Tungsten exploration rarely begins at the drill rig. A project starts with a review of everything already known about the licence area: historical reports, legacy drillholes, geochemical surveys, structural maps and tenement boundaries. From that material an exploration model is built — a working hypothesis on where mineralisation may sit and in what form. Field work, drilling, sampling, laboratory analysis, three-dimensional modelling and resource estimation follow. The deliverable is not samples and metres, but data robust enough to support investment and design decisions. This is why support for subsoil users is best organised as a single technical line rather than a series of unconnected contracts.

The work programme is tied to the deposit type and mineralisation style. Tungsten is recovered mainly from scheelite and wolframite, and economic mineralisation may be associated with skarn, vein, stockwork, greisen and polymetallic settings. The shape and depth of the orebodies, the distribution of the valuable component and the mineralogy of the ore dictate the choice of methods, drillhole orientation, grid spacing and the laboratory programme.

What follows sets out the full project route: prospecting for tungsten mineralisation, exploration planning and execution, drilling, data processing and interpretation, resource estimation, preparation of the Mining Plan (PGR), environmental support and mine design for projects across Kazakhstan. The project's organisational centre and the licence area may be located in different regions: decisions are taken in the subsoil user's or investor's office — in Almaty or Astana, for instance — while the work is carried out on site, and that separation has to be built into the schedule and logistics.

Tungsten deposits in Kazakhstan: what matters before work begins

Kazakhstan's tungsten endowment was largely defined by Soviet-era work; after a long interruption, a new phase of development of the major deposits is now under way. According to the Committee of Geology of the Ministry of Industry and Construction of the Republic of Kazakhstan, as cited in industry publications in March 2026, tungsten reserves in Kazakhstan are estimated at approximately 2.4 Mt. The source does not specify whether the figure is reported as contained metal or as tungsten trioxide, so for design and investment documentation it should be reconciled against the State Balance of Reserves. The resource base consists predominantly of large stockwork deposits.

For programme design, the style of mineralisation matters more. A project may encounter a skarn deposit where orebodies are controlled by the contact between granitoids and carbonate rocks; a greisen system confined to the apical parts of intrusives; narrow but high-contrast vein mineralisation; high-volume, low-grade stockwork mineralisation; or tungsten-molybdenum, tin-tungsten and polymetallic ores.

The deposit style translates directly into design decisions. The geological model governs the geochemical programme and the choice of geophysical methods, the position and orientation of drillholes, the exploration grid spacing, the laboratory schedule and the approach to resource modelling. A stockwork calls for an even grid and statistics across a large sample population; steeply dipping veins call for precise structural control.

Prospecting for tungsten: how prospective areas are defined

The opening stage is almost entirely desktop work. Historical geological reports, previous drilling results, geological and structural maps, records of occurrences, geochemical and geophysical survey data, satellite imagery and digital elevation models, together with licence and boundary data, are compiled; datasets of different vintages and coordinate systems are brought onto a common base. The output is an initial exploration model and a set of priority areas with the reasoning behind their selection.

Field prospecting work on tungsten is selected against that model. Depending on the setting, the programme may include:

• geological traverses, mapping and structural observations;
• lithogeochemical and geochemical sampling of soils, bedrock and unconsolidated cover;
• mineralogical work, scheelite identification by fluorescence under ultraviolet light, and heavy-mineral studies;
• ground geophysics — magnetics, electrical methods and gravity in combinations suited to the physical properties of the host sequence;
• verification of historical workings, trenches and natural exposures.

No single method is mandatory: the package is chosen against the mineralisation model and the conditions on site.

Anomalies are then tested by more detailed work — closer traverse and sample spacing, trenches, costeans or pits, detailed geophysics along priority lines, and first scout drillholes.

The prospecting stage delivers a ranked target inventory, a preliminary geological model, recommendations for the next stage and the technical justification for the exploration and drilling programme.

Tungsten deposit exploration: from anomaly to resource model

Exploration answers what prospecting cannot: the position of the orebodies, their shape and strike extent, depth, thickness and internal architecture, WO₃ grade and its distribution, by-product content, the influence of structural disruption and the variability of mineralisation.

The exploration plan sets out the sequence and volume of work, sampling types, the position of workings and drillholes, drilling depths and angles, logging requirements, the laboratory programme, QA/QC procedures, the schedule, and industrial and environmental safety measures.

Exploration proceeds from the general to the specific: testing the prospecting hypothesis, tracing mineralised zones, refining geometry, tightening the grid over the most significant areas and assembling the dataset for resource estimation.

Sufficiency is not measured by a desired number of holes, but by the level of geological knowledge and by the decision the data must support: further prospecting, a preliminary economic assessment, a resource estimate, a feasibility study or mine design.

Drilling on a tungsten exploration project: programme, core and quality control

Drillhole positions are selected against the interpreted orientation of the orebodies, the structural geology, the depth of the target horizons, topography and pad access, geophysical and surface sampling results, and the requirements of the future resource model. No universal grid spacing can be quoted without reference to a specific deposit: a stockwork and a quartz vein array call for different solutions.

Diamond core drilling is normally the primary method at exploration stages: continuous core allows the contacts of mineralised zones, ore textures and structures, fracturing, mineralogy, tungsten distribution and the geotechnical properties of the rock mass to be examined. Specific rigs, diameters and technologies are determined by the contractor's actual capability on site.

Core logging follows a single procedure: geological logging, photography, core recovery measurement, selection of sample intervals, recording of structures and contacts, and marking up. Core is placed in trays with the run order and interval marks preserved, and primary observations are transferred into a digital database with completeness checks.

Sampling is accompanied by a QA/QC programme. Certified reference materials and blanks are inserted into the sample stream; field duplicates are taken, together with coarse-reject and pulp duplicates at the corresponding preparation stages, and internal laboratory control is assessed separately. Check and umpire analyses at a second laboratory are run where required, and the database is verified for completeness and continuity. Without a documented assessment of precision and accuracy, the reliability of the resource estimate may be called into question by an auditor or an investor. Analytical work is performed by accredited laboratories; laboratory names, analytical methods and detection limits are stated in reporting for the specific project.

Material for later stages is collected in parallel: mineralogy, metallurgical samples, bulk density determinations, geotechnical studies, hydrogeological observations, and studies of by-product and potentially deleterious elements.

Resource estimation and preparing data for investment assessment

Work begins with the consolidation of a single database: collar coordinates and downhole surveys, geological logs, sampling and assay results, density data, QA/QC records and topographic control. Each block is validated — reconciliation against primary records and checks for duplicates, interval gaps and outliers.

A three-dimensional geological model is then constructed. It represents the geometry of the mineralised bodies, lithological and structural boundaries, zones of differing mineralisation style, grade distribution and areas of differing confidence, and is then tested for consistency against sections and field observations.

Resource estimation follows accepted practice: definition of estimation domains, grade statistics, compositing, selection of the interpolation method, block model construction, cut-off grade justification, resource classification and uncertainty analysis. For tungsten deposits, WO₃ grade variability and the treatment of by-products — molybdenum, tin, bismuth — warrant particular attention, as they materially affect project economics.

The reporting format depends on the task and on investor requirements, and the instruments involved are of different kinds. KAZRC is the national public reporting code of the Republic of Kazakhstan, JORC is the Australasian Code for public reporting, and NI 43-101 is the Canadian disclosure instrument for issuers. Minerals Operating publicly states competencies in reporting under JORC and NI 43-101 and in work performed by a specialist holding QMR accreditation issued by PONEN, the professional organisation recognised for the purposes of the KAZRC Code. QMR accreditation does not of itself confer Competent Person status under JORC or Qualified Person status under NI 43-101: relevant experience in the deposit style concerned and compliance with the requirements of the applicable reporting regime are both necessary. A given specialist's current accreditation is verified against the PONEN register or certificate.

The mining plan for a tungsten deposit: from exploration to production

The terms need to be kept apart. At the exploration stage the design document is the exploration plan — Article 196 of the Code of the Republic of Kazakhstan "On Subsoil and Subsoil Use" No. 125-VI of 27 December 2017. The mining plan relates to production operations: under Article 216 of the same Code it is the design document for the conduct of solid minerals production operations, is prepared and approved by the subsoil user, and describes the types, methods and means of work, indicative volumes and timing, and the technological solutions applied. A mining plan cannot be substituted by a prospecting or exploration programme, nor the reverse.

Inputs to the mining plan are the approved or accepted resource and reserve base, the geological and block models, geotechnical data, hydrogeology, topography, ore processing characteristics, infrastructure constraints, planned production capacity, industrial safety requirements and environmental constraints.

Depending on the deposit, the mining plan addresses the mining method, access design, the stoping or pit configuration, the extraction sequence and production schedule, ore and waste volumes, dilution and losses, infrastructure layout, dewatering, waste dump construction, haulage and mine safety. In mine design for a tungsten deposit, selectivity of extraction where mineralisation is high-contrast and the site water balance often require particular attention.

The mining plan does not stand alone. Its underlying assumptions must align with the environmental documentation, industrial safety decisions, the closure plan, processing solutions and the project's economic model.

Environmental support for a tungsten project

Before work capable of causing material impact begins, baseline data are collected: the condition of surface water and groundwater, soils, ambient air, flora and fauna, information on existing impact sources and on sensitive natural and social receptors.

The impacts of exploration itself are localised but require management: access tracks and drill pads, disturbance of the soil profile, water use, handling of drilling fluids and cuttings, waste accumulation, noise and equipment emissions, temporary camps, and rehabilitation of disturbed ground. Whether an environmental impact assessment and a report on possible impacts are required is determined by the Environmental Code of the Republic of Kazakhstan No. 400-VI of 2 January 2021, having regard to the type and scale of the work: some programmes go through impact screening, others fall under mandatory EIA.

The environmental profile of future mining differs between tungsten deposits. Risks depend on ore mineralogy, sulphide and impurity content, the mining method, the processing route and reagent suite, the properties of waste and host rocks, the site water balance, and the design of waste dumps and the tailings storage facility.

The scope of environmental documentation is set by project stage and facility category. Support may cover impact screening, the report on possible impacts, EIA materials, emission limit documentation, the industrial environmental control programme, waste management documentation, public hearings, environmental permits, monitoring programmes, and rehabilitation and closure. Sampling and analytical measurements are carried out by accredited laboratories: the company arranges and supervises this work but does not act as a laboratory.

Integrated support: linking geology, drilling, design and environment

Where stages are delivered by different teams without a common technical framework, inconsistencies are predictable: coordinate systems and database structures diverge, as do the geological premises of successive stages, the logic of the drilling programme against the requirements of the resource model, and design parameters against environmental calculations. Each party works within the limits of its own scope and is not accountable for the interfaces.

An end-to-end project is built as a connected sequence: audit of historical material, development of the exploration model, field prospecting, the exploration programme, drilling and sampling, QA/QC and database validation, geological and resource modelling, technical and economic assessment, mine design and the mining plan, and environmental and permitting support.

The subsoil user receives a work programme, maps and sections, a geological database, drillhole records, laboratory results, a QA/QC report, a three-dimensional model, a resource or reserve estimate, recommendations for further work, design documentation, environmental material and a permitting road map.

What drives timing and cost

The first factor is the existing level of knowledge. The availability of archival material, the quality of legacy databases, the number of historical drillholes, core preservation, the scope for re-sampling and the reliability of coordinates can either remove an entire stage from the programme or force a near-restart.

The second is field conditions: licence area, topography, remoteness and road condition, water supply, seasonality, target depth and the difficulty of establishing drill pads. On a remote site, logistics can exceed the cost of the drilling itself.

The third is the required level of outcome. Testing an anomaly, confirming mineralisation, assessing the scale of a deposit, preparing a resource model, reporting to a defined standard or moving to mine design are tasks of fundamentally different cost.

For a proposal to be meaningful, the contractor is given licence coordinates, archival reports, previous results, the intended project stage, the required outcome, timing and any known site constraints. Quoting an average cost per metre of drilling, or for a project as a whole, without a scope of work is unhelpful: such figures mislead more often than they assist planning.

Minerals Operating capability for project support

The company's scope covers analysis of historical data, preparation of exploration plans and drilling programmes, execution of exploration work, core drilling, resource estimation, technical consultancy, mine design and environmental support. Minerals Operating is registered in the AIFC; the law applicable to a particular contract is determined by its terms and by the applicable conflict-of-laws rules.

The capabilities of Minerals Operating in exploration, drilling, resource modelling, design and environmental work allow an integrated programme to be developed for a tungsten project. The specifics that evidence expertise on a given assignment — team qualifications, reporting standards applied, experience with rare and polymetallic commodities, project geography, software and laboratory partners — are set out in the commercial proposal.

Hence the working format: the analytical side — data audit, modelling, design and permitting documentation — is run in continuous contact with the client's office, while field crews work on site. On that basis Minerals Operating supports projects for subsoil users based in Almaty and other regions, with work carried out on sites across Kazakhstan.

Frequently asked questions

How does tungsten prospecting differ from exploration?

Prospecting identifies and ranks prospective targets — it establishes where to work next. Exploration establishes the geometry of the orebodies, the WO₃ grade and the continuity of mineralisation to a confidence sufficient for resource estimation.

Which methods are used in prospecting for tungsten mineralisation?

The method suite is set by the geological model. It may include geological mapping, geochemical and lithogeochemical sampling, mineralogy, ground geophysics, trenching and scout drilling, in a combination matched to the deposit style.

What type of drilling is used on tungsten deposits?

Diamond core drilling is the most common choice: the core provides material for examining contacts, structures and the distribution of mineralisation. It is not the only possible method — the choice depends on the objective, depth and site conditions.

Can a project start with a re-evaluation of historical material?

Yes, where reports, logs, assay data, coordinates and core survive. The starting point is an audit of their quality: coordinate system, sampling completeness, analytical methods used, and the scope for re-sampling the core.

When is a mining plan required for a tungsten deposit?

At the mine design stage. Exploration operations are carried out under the exploration plan, while the mining plan is prepared for solid minerals production operations.

What environmental work is required during exploration?

Baseline studies, assessment of possible impacts under the applicable procedure, waste and drill cuttings management, rehabilitation of disturbed ground, and monitoring to the extent set by the permitting documentation.

Can a mineral resource estimate and reporting be prepared under KAZRC or JORC?

Whether and in what format reporting is possible depends on data quality, the stage of knowledge and the involvement of a suitably qualified specialist. The decision follows a database audit.

Does the company work with clients based in Almaty?

Yes, and it is the usual project configuration: the client's office in Almaty, the licence area in another oblast. Consultancy, data audit and documentation are delivered remotely and in meetings, with field work carried out on sites across Kazakhstan.

Conclusion

The quality of a tungsten project is determined not by any single method or by metres drilled, but by the coherence of the whole chain: the geological model, prospecting data, the drilling programme, sampling and QA/QC, resource estimation, design decisions and environmental requirements. A break in any link devalues the investment in the rest: an unreliable database negates the resource model, and unverified baseline data hold up approvals.

For a preliminary assessment, provide the Minerals Operating team with the licence boundaries, available geological material, results of previous work and the outcome required. The team will assess the existing level of knowledge and propose a sequence of prospecting, exploration, drilling and design work.