Mining technical consulting is independent engineering and geological advice on a mineral project: whether the resource is real, whether the mine plan and processing route will work, and what it will cost. Bart Mining provides it as a principal-led service. Due diligence for investors, JORC and NI 43-101 resource estimation signed by a Competent Person, scoping through feasibility studies, and underground and coal mining advisory, delivered from Dar es Salaam across East and Southern Africa.
What Independent Mining Consulting Delivers
Independent consulting gives owners, investors and lenders a technical view with no financial stake in the answer. A contractor selling drilling metres, or a vendor selling a plant, has a reason to see the project a certain way. An independent advisor's only product is the assessment. Bart Mining's engagements are led by the principal, not delegated to a junior with a template: the person who reviews your data is the person who signs the report.
Technical Advisory
Technical mining advisory covers the decisions between a first drill result and a producing mine. Typical questions clients bring:
- Is the geological model defensible, or does the grade depend on a few high-value intercepts?
- Open pit, underground, or both, and at what depth does the switch make sense?
- Gravity, CIP, CIL or heap leach for this ore, and what test work proves it?
- Is the capital and operating cost estimate realistic for Tanzanian logistics, power and labour?
- What does the regulator need before a licence upgrade or mine opening?
Advisory can be a one-off review, a board-level independent opinion, or a retained technical role through construction.
Technical Due Diligence for Investors
Technical due diligence (TDD) is required before acquiring, financing or investing in an exploration or mining asset, whether a direct purchase, joint venture, royalty, stream or loan. Bart Mining carries out TDD for investors and acquirers. A thorough review covers:
- Geological database validation and QA/QC review (collars, surveys, assays, blanks and standards)
- Independent review of the resource estimate, or full re-estimation where the original does not hold up
- Mine plan, schedule and dilution assumptions
- Processing route, recovery claims and supporting metallurgical test work
- Capital and operating cost benchmarking
- Licence, tenure and regulatory status
- Environmental and closure liabilities
- Management team and technical capability
Resource Estimation: JORC and NI 43-101
Resource estimates for listed companies, and for anyone raising institutional finance, must follow a recognised reporting code. The two most used in Africa are the JORC Code (2012), the Australian standard widely accepted by international financiers and exchanges, and NI 43-101, the Canadian standard required for TSX and TSX-V listings. Both require a named Competent Person (JORC) or Qualified Person (NI 43-101) to take responsibility for the estimate.
Bart Mining's resource estimates are prepared and signed by a Competent Person. A compliant estimate includes:
- Database validation: collar and downhole surveys, assay QA/QC
- Geological modelling: domaining and wireframes built from logged geology, not grade shells alone
- Geostatistics: compositing, top-cutting, variography
- Grade estimation: Ordinary Kriging where the data supports it, with validation against drill holes
- Classification: Measured, Indicated and Inferred, based on geological continuity and data spacing
- Reporting: a JORC Table 1 or NI 43-101 technical report with the Competent Person's sign-off
Scoping, Pre-Feasibility and Feasibility Studies
Mining studies move from "is this worth more work?" to "can this be financed and built?". Each stage narrows the cost accuracy and needs better resource confidence. Bart Mining prepares and manages studies at every stage.
| Study | Cost accuracy | Resource input | Answers |
|---|---|---|---|
| Scoping study | ±35–50% | Mostly Inferred and Indicated | Is there a reasonable prospect of economic extraction? |
| Pre-feasibility study (PFS) | ±20–25% | Indicated and Measured | Which mining method, processing route and production rate? |
| Feasibility study (FS / DFS) | ±10–15% | Substantially Measured and Indicated | Can the project be financed and built as designed? |
A mining scoping study is the right first step for most small and mid-size projects in Tanzania: it is quick, inexpensive relative to drilling, and tells you whether to spend on infill drilling and metallurgical test work. For the full study sequence, see Mine Planning and Feasibility Studies. For the test work a study relies on, see the plant test work guide.
Underground and Coal Mining Consulting
Underground mines fail on different problems from open pits: ground control, ventilation, dewatering, hoisting capacity and escape planning. Bart Mining advises on underground metal and coal operations, covering:
- Mining method selection (room and pillar, longwall, sublevel stoping, cut and fill)
- Development design, scheduling and production rate
- Ventilation and gas management, including methane in coal mines
- Ground support and geotechnical review
- Dewatering and pumping
- Emergency escape, refuge and self-rescuer planning
- Coal resource estimation and quality (ash, volatiles, calorific value)
Equipment for these operations, including ventilation fans, dewatering pumps, SCSR self-rescuers and gas detection, can be specified and supplied through the same team.
Geological Data and Exploration Programmes
Good consulting starts with good data. Bart Mining designs and manages exploration programmes so the data they produce will stand up in a resource estimate and a due diligence review later:
- Target generation from geological survey, geophysical and geochemical data
- Drill programme design: hole spacing, RC vs diamond core, sampling protocols
- QA/QC programme design and assay laboratory management
- Geological database set-up and management
- Resident project geologists and programme management on site
Related: geological mapping and structural analysis, drilling services in Tanzania.
Who Does the Work
Engagements are led by Bartholomew Ambrose, Bart Mining's founder. He has led exploration programmes and operated producing mines over more than 25 years, including work with Resolute Mining and Barrick Gold, on deposits in Tanzania, the DRC, Liberia, Brazil, Canada and Australia. That operating background is the point: the advice comes from someone who has run the mine the plan describes. More about Bart Mining.
How an Engagement Works
- Initial call. The project, the decision you need to make, and the data that exists.
- Data review and proposal. A fixed scope, deliverables, timeline and fee, before any commitment.
- Site visit. Core, pits, workings and the plant, where relevant. A Competent Person sign-off requires one.
- Analysis. Estimation, modelling, costing or review, with findings shared as they emerge.
- Report. A clear report written for the decision it supports, whether a board, an investor, a lender or a regulator.
A desktop review typically takes 2–4 weeks. A resource estimate or scoping study is typically 6–12 weeks, depending on data quality.
Where We Work
Request a Consultation
Describe the project and the decision you are facing. You will get a scoped proposal before any fee is agreed. Email hello@bartmining.com, WhatsApp +255 759 141 705, or use the contact form.