East Star Resources Plc (LSE: EST), a Kazakhstan-focused copper and gold exploration company, has provided a progress update on its two copper joint venture projects in Kazakhstan's East Region. At the Verkhuba Copper Deposit, more than 4,800 metres of diamond drilling have been completed across 20 holes, while the initial five-hole programme at the Rulikha Copper Project has reached 1,290 metres. The update also confirms that joint venture partner Xinhai has fulfilled its full Stage 1 investment obligations of A$1.5 million, triggering the transfer of an initial 15% interest in Verkhuba Ltd to Xinhai. Investors will be watching progress towards a maiden resource at Rulikha, targeted for Q2 2027.

Key Points

  • East Star Resources Plc (LSE: EST) is a Kazakhstan-focused copper and gold exploration and development company
  • Over 4,800 metres drilled across 20 holes at Verkhuba; first 1,290 metres completed at Rulikha across five holes
  • Xinhai has completed Stage 1 obligations totalling A$1.5 million; 15% interest in Verkhuba Ltd transferred to Xinhai; East Star carried to production retaining a 30% interest
  • Investors should watch for the Rulikha programme reaching 3,000 metres, qualifying Nova for its initial 10% interest, and a maiden JORC or KAZRC resource targeted by Q2 2027

Verkhuba Drilling Surpasses 4,800 Metres as Xinhai Completes A$1.5 Million Stage 1 Investment

At Verkhuba, which carries a resource of 20.3Mt at 1.16% Cu, 1.54% Zn and 0.27% Pb, the two-rig diamond drilling programme is designed to support resource conversion, geological modelling, mine planning and feasibility studies. Approximately 9.5 line kilometres of ground electromagnetic surveying have been undertaken, with three conductors being modelled for potential drill testing, including a conductor east of the historic Pokrovskoye mine. Metallurgical test work has commenced to improve recoveries and inform plant design. Crucially, East Star is fully carried through to production at no further cost to the company, retaining a 30% interest in the producing mine.

Rulikha Joint Venture With Nova Targets 3,000 Metres to Unlock Initial 10% Interest Transfer

At Rulikha, which carries a 23Mt at 2.4% CuEq exploration target, joint venture partner Nova Ltd has completed the first five drill holes totalling 1,290 metres. The programme is planned to extend to 3,000 metres, at which point Nova will qualify for the first tranche of its interest, representing 10% of Rulikha Ltd. A fully winterised drill rig is expected to continue operations through winter, with further drilling intended to support a JORC or KAZRC compliant resource, qualifying Nova for a 25% interest in the joint venture company. A consultant resource geologist is being selected to advise on a subsequent resource definition programme.

Local Authority Support and Permitting Progress Underpin Verkhuba Development Timeline

The announcement states that a meeting between East Star's CEO, Xinhai management, the Deputy Akim of Shemonaikha and the Akim of Verkhuba produced a positive outcome. Both local administrations reiterated their support for the project and offered assistance with ecological studies, infrastructure planning and permitting. Contractor selection for engineering studies and environmental work is being finalised. The announcement suggests that community and regulatory engagement is advancing in parallel with the technical programme, a meaningful consideration given the permitting requirements typical of large-scale copper development projects in Kazakhstan.

East Star's Carried-Interest Model and Endeavour Mining Backing Underline Strategic Position

East Star's business model sees its copper joint venture work programmes fully funded by partners, with the company carried through to production at both Verkhuba and Rulikha. Beyond the copper projects, the company is engaged in a US$25 million-plus strategic gold exploration joint venture with FTSE 100 Endeavour Mining, which is also East Star's largest shareholder. The key risk specific to East Star remains the early-stage nature of both copper projects; neither has yet achieved a compliant mineral resource at Rulikha, and feasibility studies at Verkhuba remain ongoing, meaning material uncertainty around project timelines and ultimate production outcomes persists.