Reko Diq and Pakistan's Copper-Gold Belt: The Regional Geological Context

Reko Diq sits on 5.9 billion tonnes of ore. That's not a marketing number — that's the figure Barrick has filed in their feasibility study, and it makes Reko Diq one of the largest undeveloped copper-gold deposits on the planet.

And yet most people in Pakistan still couldn't point to it on a map.

I want to fix that. Not because Reko Diq is special on its own (it isn't, geologically speaking — there are likely several deposits like it within 200km of the same site), but because understanding why Reko Diq exists tells you everything about where the next one will be found.

The Chagai Arc Is Not an Accident

Pakistan's copper-gold belt runs through Balochistan along what geologists call the Chagai magmatic arc. It's a strip of volcanic and intrusive rock roughly 480km long, stretching from the Iranian border eastward toward Kharan. The arc formed because the Arabian plate has been grinding northward under the Eurasian plate for around 80 million years, and as oceanic crust got shoved down into the mantle, it melted and pushed magma upward.

That magma is the reason we have copper here.

When hot fluids loaded with metals rise through fractured rock and cool down, they drop their cargo. Copper, gold, molybdenum, sometimes silver. The deposits that form this way are called porphyry copper systems, and the Chagai arc is textbook porphyry country. Same geological setting as Chile's copper belt. Same setting as Indonesia's Grasberg. Same setting as Arizona's Morenci.

Honestly, when I first started studying this belt I thought Reko Diq was the prize. Then I looked at the satellite data across the full arc and realized Reko Diq is just the one we happened to drill.

What's Actually Sitting Out There

The known deposits along the Chagai arc include Reko Diq (copper-gold, currently being developed by Barrick and the governments of Pakistan and Balochistan), Saindak (already producing — operated by MCC), and at least 14 other identified prospects with names most people have never heard of. Tanjeel. Western Porphyries. North Reko. H4, H8, H14, H15. These aren't speculative — they've been mapped, sampled, and in some cases drilled at low density.

What hasn't happened? Anyone systematically covering the gaps between them with modern remote sensing.

This is where I get a little frustrated with how exploration has historically worked in Pakistan. The Geological Survey of Pakistan did solid foundational mapping in the 70s and 80s. But satellite data wasn't really usable for mineral targeting until ASTER launched in 1999, and Sentinel-2 didn't come online until 2015. So most of the regional understanding of the Chagai arc was built before we had the tools that now let us spot alteration zones from orbit.

At GeoMine AI we've run alteration mapping across roughly 38,000 sq km of the Chagai arc using Sentinel-2 and ASTER stacks. The results are uncomfortable for anyone who thinks the belt is well-explored. There are clear hydrothermal alteration signatures — argillic, phyllic, propylitic zones, the classic porphyry halo pattern — sitting in areas with zero recorded exploration activity.

Some of those signatures are 40-60km from the nearest known deposit.

Why Reko Diq Took So Long

Quick history, because it matters. Reko Diq was first identified as anomalous in the 1970s. BHP came in during the 90s. Then Tethyan Copper Company. Then a 14-year legal mess that ended with a $5.8 billion arbitration award against Pakistan in 2019, which got resolved in 2022 when Barrick restructured the deal with the federal government and Balochistan.

First production is now expected in 2028. So from initial anomaly identification to first copper concentrate? Roughly 55 years.

That's not a geology problem. That's a process problem. And it's the reason most of the Chagai arc is still effectively frontier ground despite being one of the most metallogenically promising regions on Earth.

Look, here's the thing — when I tell international investors that Pakistan has $6 trillion in mineral reserves, they nod politely. When I show them the Sentinel-2 alteration map of the Chagai arc with 16 unexplored anomalies clustered along the same intrusive trend that hosts Reko Diq, the conversation changes.

Data is more persuasive than claims.

What Sits Beyond Chagai

The copper-gold story doesn't end at the Chagai arc. There's the Bela ophiolite to the south (chromite, with associated platinum-group metal potential). There's the Waziristan-Khost belt running through the tribal areas (chromite, copper, possibly gold, almost completely unexplored due to security). There's the Kohistan island arc up north in Gilgit-Baltistan, which is geologically related — same subduction-related magmatism, different age — and where I personally hold mining leases on 15 sites.

Kohistan is where I started, and it's a good example of how the textbook regional model breaks down at the property scale. The arc theory tells you copper-gold should be there. The satellite data tells you where the alteration is. But the actual deposit-scale targeting still needs ground truth — rock chip sampling, IP surveys, eventually a drill rig.

Remote sensing narrows 38,000 sq km down to maybe 40 high-priority targets. That's the real value. You're not finding the deposit from space. You're cutting 99.9% of the ground out of the search so the expensive work happens in the right places.

Which raises a question I've been sitting with — if Reko Diq took 55 years from anomaly to production, and there are 40+ similar-grade targets sitting along the same arc, what does Pakistan's copper output look like in 2050 if even three of those get developed properly?