Northstone Resources has made Serbia the central focus of its gold and copper exploration and development strategy, combining an established precious-metals resource in the south of the country with copper-gold exploration targets near Bor. The Australian-listed company, formerly known as MinRex Resources, began trading under the Northstone Resources name and the ASX ticker NRL following its merger earlier in the year with Canada’s Electrum Discovery.
The merger brought two Serbian projects into the combined company: the Tlamino gold-silver project in southern Serbia and the Timok East copper-gold project near Bor. Northstone has identified Serbia as its primary jurisdiction for current exploration and development activities. Tlamino is the more advanced of the two assets, with an existing inferred mineral resource and an earlier preliminary economic assessment. Timok East offers exploration exposure within an established copper-gold district, although a commercial discovery has not yet been confirmed.
Tlamino Resource and Development Programme
The Tlamino project covers more than 400 square kilometres through two granted exploration permits and three permit applications along the Serbo-Macedonian metallogenic belt. Its Barje deposit contains an inferred resource of approximately 7.1 million tonnes grading 2.9 grams per tonne gold-equivalent, representing around 670,000 ounces of gold-equivalent. The resource includes approximately 570,000 ounces of gold and 8.8 million ounces of silver.
Northstone’s planned work includes infill drilling to increase confidence in the existing Barje resource and step-out drilling to test its extensions. The company also intends to investigate additional targets along the Barje-Liska structural corridor, expanding exploration beyond the currently defined resource.
Updated Economic Studies and Permitting
A 2021 preliminary economic assessment (PEA) examined Barje as a potential conventional open-pit gold-silver operation. Northstone plans to update the project’s technical and economic studies using new geological information and a commodity-price environment different from that prevailing when the original assessment was prepared. The next development stages include resource conversion, revised economic analysis, environmental work and Serbian permitting. These steps will be required to establish a pathway towards feasibility studies and project financing.
Tlamino therefore combines an existing inferred resource with previous economic assessment work, while further drilling and technical studies are intended to improve the information available for development decisions.
Timok East Copper-Gold Targets Near Bor
Northstone’s second Serbian asset, Timok East, lies approximately 2 kilometres from the Veliki Krivelj copper mine and 5 kilometres from the Bor mining complex. Geophysical investigations have identified two conductive zones at depths of roughly 250–550 metres below surface. Northstone interprets these anomalies as possible intrusive or hydrothermal systems associated with concealed porphyry copper-gold mineralisation.
The company plans additional modelling and target ranking before commencing initial diamond drilling. Timok East was previously selected for BHP’s Xplor programme, providing additional technical validation, although the project has yet to establish a commercial discovery. The licences give Northstone exposure to exploration potential adjacent to one of Serbia’s established copper-gold mining districts, complementing the more advanced precious-metals work at Tlamino.
Serbia as Northstone’s Main Exploration and Development Platform
Serbia’s copper sector is dominated by Zijin’s operations around Bor and Čukaru Peki. Northstone’s portfolio represents a different stage of mining investment, with listed exploration capital directed towards drilling, resource definition and project development before mine construction. Tlamino and Timok East occupy different positions in that development sequence. Tlamino has a defined inferred gold-silver resource and previous economic assessment work, while Timok East remains an exploration proposition focused on identifying concealed copper-gold mineralisation.
Northstone’s progress in Serbia will depend on the results of drilling, further resource work, technical and economic studies, environmental requirements and permitting. The company is advancing development-related work at Tlamino while preparing to refine drill targets at Timok East, establishing Serbia as the principal focus of its gold-copper portfolio.
