Lead-Silver in Gilgit-Baltistan: What's Actually in the Ground

Most buyers who call me about Gilgit-Baltistan want copper or antimony. Lead-silver is the one they bring up at the end of the call, almost as an afterthought. And then the conversation gets longer.

Because here's the thing — a clean galena concentrate carrying 800 to 1,400 g/t silver is not a side product. It's the kind of material a smelter in Yunnan or a trader in Singapore will quote you on within 48 hours. The polymetallic story in GB is real, it just doesn't get the press the porphyry copper plays do.

The geology, briefly

The lead-silver-zinc occurrences in Gilgit-Baltistan sit mostly along the Main Karakoram Thrust zone and through the metasedimentary belts that wrap around the Kohistan island arc. We're looking at carbonate-hosted replacement bodies, vein systems in calc-silicate hornfels, and skarn assemblages where granitic intrusions of the Karakoram batholith cooked the surrounding limestones and dolomites.

Galena is the dominant sulphide. Sphalerite shows up alongside it, sometimes in roughly equal proportion, sometimes lagging. Pyrite is ubiquitous (which matters for concentrate penalties — I'll come back to that). The silver is largely carried in the galena lattice itself, with minor tetrahedrite and freibergite in some of the higher-grade shoots.

I used to think the silver values would be modest — typical Mississippi Valley Type numbers, maybe 60-120 g/t. Then we pulled channel samples from one of our Astore-side prospects that ran 1,180 g/t Ag with 14.2% Pb. That changed how I read these systems. The Karakoram intrusives have added a clear magmatic-hydrothermal overprint in places, and that's where the silver concentrates.

Grades we're actually seeing

I'll give you ranges from work across the concession block, not just the hero numbers:

• Pb: 4.8% to 22.6% in vein material; 2.1% to 7.4% across wider replacement zones
• Ag: 180 g/t to 1,400 g/t, with a working average around 620 g/t in the better structures
• Zn: 1.9% to 11.3%, highly variable and often zoned away from the Pb-Ag core
• Cu: typically below 0.4%, occasionally spiking to 1.1% where tetrahedrite is present

For context, a concentrate buyer in China is generally comfortable with 55-65% Pb concentrate carrying 1,500-3,000 g/t Ag. We can hit that with relatively conventional flotation circuits. The metallurgy isn't exotic — galena floats well, the silver reports cleanly with the lead concentrate, and the zinc can be pulled into a separate clean sphalerite con if the grade and tonnage justify a second circuit.

Honestly, the bigger question isn't whether the rock will perform in a mill. It's tonnage. We're still in the resource-definition phase on most of these structures, and any serious JV partner will want to see drilling — not just trench and channel data — before talking off-take volumes.

Why this matters right now

Silver demand isn't a soft story anymore. Solar PV alone consumed around 232 million ounces in 2024 per the Silver Institute, and that number's been climbing each year as cell efficiency pushes silver paste loadings. The supply side is the problem — about 72% of mined silver comes as a by-product of lead, zinc, copper and gold operations. So when base metal capex stalls, silver tightens.

Lead has its own quiet story. The lead-acid battery isn't going anywhere despite what the lithium headlines suggest — backup power, telecom, industrial, automotive starter batteries. Refined lead demand has stayed sticky around 12-13 million tonnes per year globally. And concentrate is where the squeeze sits, not refined metal. Asian smelters are running below capacity on feed.

So a Pakistani concentrate with strong silver credits walks into a friendly market. The treatment charges (TCs) on lead concentrate have been soft for sellers through 2024 and into 2025 — meaning smelters are paying more to get hold of feed. That's a real number that shows up in your netback.

What a buyer should actually ask

Look, I'd rather have the hard questions early than waste anyone's quarter. If you're evaluating lead silver mining Pakistan opportunities seriously, here's what to push on:

Penalty elements. What's the arsenic, antimony, bismuth in the concentrate? Our preliminary work shows As generally below 0.3% and Sb in the 0.1-0.4% range, which is workable, but every deposit has its quirks and the As can spike where tetrahedrite is heavy.

Recoveries. Bench-scale flotation on our material has put Pb recovery between 88% and 93%, with Ag recovery tracking the lead at 85-90%. Pilot-scale will refine that.

Logistics. This is where people get nervous about Pakistan and shouldn't. Concentrate from Skardu or Astore moves by road to Karachi Port — it's a long haul (roughly 1,650 km) but it's a route that's moved chromite, copper concentrate and barite for decades. Trucking cost is a real line item but it's not a deal-breaker on a high-value lead-silver con. For Chinese buyers, the Khunjerab crossing into Xinjiang is genuinely interesting for direct overland routing, though seasonal closures and customs throughput need to be planned around.

Licensing. Our concessions are held under Gilgit-Baltistan mineral rules, which sit under the GB Mines and Minerals Department. Exploration licences and mining leases are issued at the territory level, not federal, and that actually simplifies things compared to some other Pakistani provinces. Export of concentrate is permitted under standard SBP and customs procedures.

Where we are on the ground

Of our 16 concessions, four host documented lead-silver-zinc occurrences with surface grades I'd put in front of any serious counterparty. Two of those are at the trenching and channel-sampling stage. One is ready for a drill programme — we've got the targets mapped, access roads passable for rig mobilisation in summer months, and we're in early discussions with two parties about a joint funding structure for the drill campaign.

If you're sourcing polymetallic deposits Gilgit-Baltistan material, or you're a smelter looking at lead zinc silver Pakistan concentrate for a 3-5 year off-take, the conversation is worth having now rather than after the drill results land and the terms tighten.

What grade window does your circuit actually want to see?