Castillo Copper (ASX:CCZ) share price rockets 47% on major copper discovery

The Castillo Copper Ltd (ASX: CCZ) share price surged nearly 50% after announcing a game changing discovery at its Big One deposit.

The Castillo Copper Ltd (ASX: CCZ) share price has surged 47% at the time of writing after the company released exploration results from its Big One deposit in Queensland. 

About Castillo Copper 

Castillo Copper is an Australian-based explorer focused on copper across Australia and Zambia. The company is embarking on a strategic transformation to morph into a mid-tier copper producer. Castillo currently has four properties: 

  • Mt Oxide project in the Mt Isa copper-belt district, north-west Queensland, which delivers significant exploration upside through having several high-grade targets 
  • Four high-quality prospective assets across Zambia's copper-belt, which is the second largest copper producer in Africa 
  • A large tenure footprint proximal to Broken Hill's world-class deposit that is prospective for zinc, silver, lead, copper and gold 
  • Cangai Copper Mine in northern New South Wales, which is one of Australia's highest grading historic copper mines.

 The Big One deposit 

One of Castillo's priorities has been developing its Mt Oxide Project, especially progressing drilling campaigns at the Big One deposit. 

Today, the company announced "game changing assays", which significantly extend the known mineralisation at the high-grade Big One deposit. This discovery pushed the Castillo share price up by 47% to 6.5 cents at the time of writing. 

Castillo Copper's Managing Director Simon Paull commented:

We are delighted to receive assays of this calibre, especially with global copper supplies tight. There is now compelling evidence Big One Deposit is a shallow, high-grade copper-cobalt system that can potentially scale further. The Board is now ramping up forward development work and the modelling of a maiden JORC compliant resource.

There is an expected pause in drilling activities due to the commencement of the wet seasons across northern Australia. However, the company announced a geophysics campaign is being formulated to identify new bedrock conductors and potential test-drill targets. 

In addition, the board has instructed the Castillo geology team to commence modelling a JORC compliant resource based on available historic and fresh data. If the outcome of the geological modelling is positive, then the board expects to commence applying for a fresh mining lease.

The Castillo share price is up by 170% on this time last year. On current prices, Castillo has a market capitalisation of $65.92 million.

Motley Fool contributor Lina Lim has no position in any of the stocks mentioned. The Motley Fool Australia has no position in any of the stocks mentioned. The Motley Fool has a disclosure policy. This article contains general investment advice only (under AFSL 400691). Authorised by Bruce Jackson.

More on Resources Shares

Businessman working and using Digital Tablet new business project finance investment at coffee cafe.
Resources Shares

Is the Rio Tinto share price good value after a 23% decline?

I crunch the numbers to see whether this mining giant offers good value around $150.

Read more »

Group of miners working at a coal mine with one smiling and holding up a piece of coal.
Resources Shares

Whitehaven Coal posts record Q1 production and keeps FY27 guidance

Whitehaven Coal posted record first-quarter production and reaffirmed guidance, with costs at the low end and acquisition payments nearly complete.

Read more »

Miner and company person analysing results of a mining company.
Resources Shares

Mineral Resources delivers record Q1 iron ore and lithium sales

Mineral Resources delivered record Mining Services volumes and lithium sales for Q1 FY27, with strong operational and financial updates.

Read more »

Two workers on a tablet at a mine site, with mining machinery behind them.
Resources Shares

Newmont Corporation reports robust third-quarter result and higher profit

Newmont posted higher quarterly profit and cash flow, lifted dividends, and flagged solid liquidity and new growth projects.

Read more »

a chalk drawing of a car is connected to a real green battery, signifying clean energy
Resources Shares

Lithium price set to soar 63% in FY27. Here's why and the ASX shares to buy

We reveal official commodity price forecasts and which ASX lithium shares experts rate a buy.

Read more »

A sad looking engineer or miner wearing a high visibility jacket and a hard hat stands alone with his head bowed and hand to his forehead as he speaks on a mobile.
Resources Shares

Why have Rio Tinto shares lost 23% since June?

... and what to expect out of the shares next.

Read more »

Young successful engineer, with blueprints, notepad, and digital tablet, observing the project implementation on construction site and in mine.
Resources Shares

Vault Minerals posts Q1 gold output and cash flow in September 2026 quarter

Vault Minerals delivered strong gold production, cash flow and project progress in the September 2026 quarter.

Read more »

Two people wearing hard hats talking with each other at a mine site, with two workers in the background.
Resources Shares

Nickel Industries posts record ore sales, solid EBITDA for Q3 2026

Nickel Industries delivered record Hengjaya Mine ore sales and steady EBITDA growth in the September quarter, with expansion projects progressing.

Read more »