Aya’s Boumadine NPV hits US$3.5B: economics and design notes for mine planners
Reviewed by Joe Ashwell

First reported on MINING.com
30 Second Briefing
Aya Gold & Silver has more than doubled the after-tax NPV of its Boumadine gold-silver-zinc-lead project in Morocco to US$3.5 billion, with a 93% IRR and 0.7-year payback at US$3,500/oz gold and US$50/oz silver, while initial capex rises only 4% to US$463 million. The plan envisages six open pits transitioning to underground, feeding an 8,000 t/d flotation plant (potentially 10,000 t/d by year 3–4) over a 14-year mine life, producing 2.25 Moz gold, 81.2 Moz silver, 422,000 t zinc and 195,000 t lead. Economics lean heavily on richer price and payability assumptions, while lower life-of-mine grades (1.77 g/t Au, 63.5 g/t Ag, 1.37% Zn, 0.58% Pb) and a 400,000 m infill drill programme will be key de-risking points ahead of a 2H 2027 feasibility study.
Technical Brief
- Six staged open pits transition to underground stoping, all feeding a single 8,000 t/d flotation plant.
- Aya is evaluating a debottlenecking/expansion to 10,000 t/d in years three or four of operations.
- Current resource: 8.6 Mt indicated at 1.93 g/t Au, 121.7 g/t Ag, 2.19% Zn, 1.01% Pb, 0.09% Cu.
- Inferred inventory adds 45.4 Mt at 1.82 g/t Au, 56.8 g/t Ag, 1.33% Zn, 0.58% Pb, 0.08% Cu.
- Average concentrate payability assumptions increased from 73% to 83% based on preliminary offtake proposals.
- At 3 September spot prices, Aya estimates after-tax NPV of US$5.5 billion and 128% IRR.
- BMO’s long-term price deck cuts project NAV to US$1.85 billion, 11% below its prior estimate.
- Desjardins had previously modelled US$600 million initial capex, so views the US$463 million estimate as conservative.
Our Take
Aya Gold & Silver already features in our coverage for very high-grade silver at Zgounder in Morocco, so Boumadine’s multi-metal profile in the same country strengthens Aya’s position as a Morocco-focused silver and gold producer rather than a single-asset story.
BMO’s more conservative Boumadine NAV of $1.85 billion at a $36/oz long-term silver price underlines how sensitive this Morocco polymetallic project is to silver assumptions, which matters in a market where our database shows frequent silver-linked volatility across the 600 keyword-matched copper/gold pieces.
With Boumadine targeting the second half of 2027 and Aya already highlighted in our December Global Mining Power Rankings, the company is positioned to move from explorer–developer to a multi-mine operator on the TSX and Nasdaq, which typically broadens its potential institutional investor base and financing options for a $400M+ capex build.
Prepared by collating external sources, AI-assisted tools, and Geomechanics.io’s proprietary mining database, then reviewed for technical accuracy & edited by our geotechnical team.
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