Mining Project: Gold & Polymetallic Operation — Suyo, Peru
A high-margin, small-to-medium scale underground mining and processing operation targeting Au–Cu–Ag sulfide ores in Ayabaca Province, Piura, Peru. This report presents integrated technical and financial findings under conservative base-case assumptions.
Strong Economics Under Conservative Assumptions
The project integrates underground ore extraction, on-site polymetallic flotation processing at 30 TPD, and direct concentrate handling — eliminating dependence on third-party toll plants. Even under a conservative scenario featuring a 30% production reduction and 15% operational downtime, the project demonstrates compelling financial performance.
Annual Revenue
Conservative case, 267.75 oz/month effective production
Annual Net Profit
Net margin of 35–40% on conservative revenue base
Payback Period
Full CAPEX recovery within first year of operations
Annual ROI
Estimated return on invested capital, 200–220% range
Project Architecture & General Operations
Operational Components
The project encompasses three integrated operational modules designed for continuous, self-sufficient production:
Ore Extraction
Underground/small-scale mining from the Peru concession in Suyo, Ayabaca Province
Material Transport
Ore haulage from mine face to on-site processing facility via established access infrastructure
Mineral Beneficiation
30 TPD polymetallic flotation plant producing Cu–Au–Ag concentrate for direct sale
Target Mineralogy
The operation targets gold-bearing sulfide ores with a polymetallic assemblage. Primary value metals include:
Au
Gold — primary value driver
Cu
Copper — flotation co-product
Ag
Silver — secondary byproduct
Additional recovery potential exists from pyrite-associated gold, addressable through an optional secondary flotation circuit. The plant is engineered for future expansion beyond the initial 30 TPD nameplate capacity.
Four-Stage Polymetallic Flotation Process
The plant follows a conventional polymetallic flotation flowsheet designed for reliable throughput and concentrate quality. Each stage is engineered to maximize mineral liberation and metal recovery efficiency.
The closed-circuit crushing configuration and hydrocyclone classification ensure consistent feed preparation, while the Denver/Sub-A flotation cells provide proven performance in polymetallic sulfide applications. Final concentrate is packaged in 1-ton big bags at target moisture of ~10%, ready for direct shipment.
Stage-by-Stage Circuit Specifications
Crushing Circuit
- Primary jaw crusher: 10" × 16"
- Secondary cone crusher: 2 ft
- Vibrating screen in closed circuit
- Target output: <½ inch feed
Grinding Circuit
- Ball mill: 3' × 6'
- Hydrocyclone classification
- Output: 58–60% passing 200 mesh
- Objective: Full mineral liberation
Flotation Circuit
- Bulk flotation: Cu–Au–Ag recovery
- Optional pyrite secondary circuit
- Denver/Sub-A flotation cells
- Reagent dosing systems included
Filtration & Handling
- Filter press or sedimentation tanks
- 48-hour drying protocol
- Packaged in 1-ton big bags
- Target moisture: ~10%
Supporting Infrastructure & Facility Requirements
The project includes a full suite of auxiliary infrastructure necessary for self-sufficient, continuous operations. These facilities are incorporated within the CAPEX envelope and are designed for immediate operational readiness upon commissioning.
Tailings Storage Facility
On-site relavera designed and permitted for safe, long-term containment of flotation tailings in compliance with Peruvian environmental regulations.
Water Supply System
Dedicated water supply infrastructure supporting process water demand for the grinding and flotation circuits, with provisions for recirculation.
Electrical Distribution
Medium-voltage electrical distribution network supplying crushers, mill drives, flotation cells, and all ancillary equipment across the plant footprint.
Laboratory & Workshop
On-site assay laboratory for quality control and a maintenance workshop equipped for routine servicing and emergency repairs of plant equipment.
Base Case vs. Conservative Production Scenarios
Base Case
15 oz/day × 30 days/month = 450 oz/month
Assumes full plant availability at nameplate throughput with no operational interruptions. Represents the theoretical maximum under current design parameters.
- Daily output: 15 troy oz Au
- Monthly output: 450 oz
- Annual output: ~5,400 oz
Conservative Case (Applied)
To reflect realistic operational conditions, the financial model applies two discounts to the base case:
- Production reduction: −30% for grade variability and recovery uncertainty
- Operational downtime: −15% for maintenance, logistics, and ramp-up delays
- Effective production: 267.75 oz/month
- Annual production: ~3,213 oz
All financial projections in this report are based on the conservative case. The base case represents meaningful upside optionality.
Revenue Projections at Conservative Gold Price
Model Assumptions
$4,000/oz
Gold price — no hedging applied, conservative relative to current spot
267.75 oz/mo
Effective monthly production under conservative scenario
No Hedging
Full price exposure retained; upside fully captured at spot
Revenue Calculation
Revenue upside levers include: (1) higher realized gold prices — spot has traded significantly above $4,000/oz; (2) improved metallurgical recovery beyond the 70–90% assumed range; and (3) increased plant throughput beyond 30 TPD through equipment upgrades or operational optimization. Silver and copper credits are not modeled but provide additional revenue optionality.
CAPEX: $2.245M Total Investment
CAPEX Structure & Deployment
Capital is front-loaded across months 1–3, encompassing full plant construction, tailings storage development, and site preparation. The budget includes a working capital reserve of $555K to fund initial operational months prior to first revenue receipt. The $50K contingency line provides limited buffer for scope variation.
OPEX Structure: ~$450K/Month
Monthly operating expenditure is estimated at approximately $450,268, structured across variable and fixed cost components. The 60/40 variable-to-fixed split provides meaningful cost flexibility in response to production fluctuations.
Variable Costs — 60% of OPEX
Mining & Processing
Direct extraction, haulage, and plant operating costs scaling with tonnage processed
Refining & Treatment
Smelter/refinery treatment charges and penalties applied to concentrate shipments
Ore Acquisition
Costs associated with sourcing supplemental feed material if required to maintain throughput
Fixed Costs — 40% of OPEX
Labor (~75 Personnel)
Largest single fixed cost line; includes underground mining crew, plant operators, supervisors, and support staff
Security
Site perimeter and concentrate security for a high-value, remote operations environment
Administration & Utilities
Site G&A, regulatory compliance, power costs, and communications infrastructure
Key Financial Metrics: Monthly & Annual Summary
Monthly Revenue
267.75 oz at $4,000/oz realized gold price
EBITDA Margin
Monthly EBITDA of ~$620,732 on $1.071M revenue
Net Margin
Annual net profit of $4.5M–$5M on $12.85M revenue
Estimated NPV
Net present value based on project financial model assumptions
Payback in Under One Year — 200%+ Annual ROI
Investment Returns Summary
<1 Year
Full CAPEX payback period at conservative production
200–220%
Estimated annual return on invested capital
~$15M NPV
Net present value estimate from project financial model
ROI Context & Sensitivity
The sub-one-year payback period is driven by the exceptionally high EBITDA margin (~58%) relative to the modest total investment of $2.245M. Even under adverse production scenarios, the project generates sufficient monthly cash flow to recover capital within 12 months of steady-state operations.
The 200–220% annual ROI estimate reflects the relationship between annual net profit (~$4.5M–$5M) and total invested capital ($2.245M). This ratio is characteristic of well-structured, high-grade small-scale gold operations with controlled CAPEX and lean operating structures.
The $15M NPV estimate provides a forward-looking value anchor for investors and financiers, subject to confirmation of geological and metallurgical assumptions through systematic testwork and resource definition.
A High-Margin Gold Operation with Strong Investment Fundamentals
The Mining Project at Suyo, Ayabaca Province represents a structurally sound, high-margin gold and polymetallic operation with an exceptionally favorable capital efficiency profile. The integrated 30 TPD processing plant eliminates toll processing dependency, preserves margin, and provides operational control from ore to concentrate.
Technical Soundness
Conventional proven flowsheet — jaw crushing, ball milling, bulk flotation — with established equipment and well-understood metallurgical pathways for Au–Cu–Ag sulfide ores
Financial Strength
58% EBITDA margin, sub-one-year payback, and 200%+ annual ROI under conservative assumptions provide a compelling risk-return profile for equity and debt participants
Validation Required
Geological resource confirmation, metallurgical testwork, and formal feasibility study are the critical next steps to convert this high-potential project to bankable status