This article is a sponsored feature from Mining.com.au partner Kobrea Exploration. It is not financial advice. Talk to a registered financial expert before making investment decisions.
For decades, Argentina’s Mendoza Province sat in the shadow of some of the world’s most prolific copper jurisdictions.
To the north, neighbouring San Juan attracted global mining giants and delivered tier-one discoveries.
Across the Andes in Chile, the world’s largest copper mines continued to underpin nearly a quarter of global supply.
Mendoza, meanwhile, remained largely untouched.
It wasn’t because the geology lacked promise. Exploration companies, including Rio Tinto (ASX:RIO), Vale SA (NYSE:VALE), and the Lundin Group, had examined the region over the years with promising early-stage results, but obtaining the permits required to advance targets through drill testing proved too difficult, and these operators moved on to different jurisdictions.
That changed in 2024.
Following a shift in provincial policy, Mendoza reopened a portion of the province called the Western Malargüe Mining District to exploration, creating an opportunity few companies had anticipated.
Among those already waiting was Canadian explorer Kobrea Exploration (CSE:KBX), which had quietly assembled a commanding land position before the policy changes took effect.
Now, less than two years later, the company’s early conviction has received validation from the biggest name in global mining.
Kobrea has entered into an alliance agreement with BHP Group’s (ASX:BHP) subsidiary BHP Metals Exploration to jointly advance exploration across the Western Malargüe Copper Projects in Argentina.
BHP Metals will make a one-time advance cash payment of US$3 million ($4.25 million) to Kobrea upon starting the agreement. BHP Metals will also fund a minimum of US$5 million in exploration expenditure over an initial two-year period, as part of the project generation phase.
During the project generation phase, BHP Metals may designate up to four separate projects, in aggregate, to advance into individual earn-in phases.
For each designated project, the company will have the option to earn a 75% interest by sole funding a minimum of US$40 million in exploration expenditures over eight years.
Kobrea will serve as operator during the two-year project generation phase, after which BHP Metals may elect to assume operatorship.
Upon completion of an earn-in, the companies will establish a joint venture, in which BHP Metals and Kobrea will hold a 75% and 25% interest, respectively.
Western Malargüe Copper Projects
The Western Malargüe Copper Projects comprise seven projects covering 73,334 hectares (733km²) about 65km west of Malargüe in Mendoza Province.
The portfolio includes numerous porphyry copper targets across elevations of roughly 2,500–4,000m, with prospects for copper, gold, and molybdenum mineralisation.
The land package includes El Perdido, El Destino, Cuprum, Sofi, Elena, Veronica, and Mantos de Cobre, with individual project areas ranging from 6,877 hectares to 13,432 hectares.
At El Perdido, Kobrea completed 2,358m of diamond drilling across six holes in 2026, representing the first drilling program ever conducted on any of the projects. Results included 65m @ 0.15% copper (Cu) from 109m in DD26ELP005 and 54m @ 0.11% Cu from 420m in DD26ELP001, confirming the presence of a mineralised system that merits additional drill testing, which could lead to a significant discovery.
A calculated move
According to Kobrea CEO James Hedalen, the company acquired its Mendoza projects before exploration permits were even available.
The move reflected a broader geological thesis. Kobrea believed western Mendoza Province represented one of the few remaining underexplored sections of the Andes, as it lies within the Neogene Porphyry Belt, which is home to two of the three largest copper deposits in the world.
Unlike San Juan, where decades of exploration resulted in the discovery of several giant porphyry systems, Mendoza remained largely a geological blank slate due to inherent challenges in the permitting regime.
That distinction underpins much of Kobrea’s strategy.
Rather than searching for overlooked deposits in mature jurisdictions, the company positioned itself ahead of what it believed would become Argentina’s next exploration frontier.
Partnership with BHP
Major mining companies rarely invest in grassroots exploration without a compelling geological and commercial rationale.
BHP, in particular, has built its global copper business around long-life, tier-one assets capable of supporting production for decades. The company generally seeks opportunities with district-scale potential rather than isolated prospects.
For Hedalen, that helps explain why BHP approached Kobrea.
“In general, major miners are looking for tier-one deposits with district-scale potential, not small, standalone discoveries,” he said.
“We believe our land package has the geological potential to host the kind of tier-one deposits major mining companies are seeking.”
Rather than waiting for an initial discovery, BHP has elected to enter at an earlier stage.
The agreement gives BHP exposure to one of the Andes’ least explored copper districts while allowing Kobrea to retain an active role in advancing the projects.
“We’ll continue to operate the projects during this phase, supported by BHP’s technical expertise and financial backing, with the goal of advancing discoveries as efficiently as possible,” Hedalen said.
More than exploration funding
For junior explorers, partnerships with major mining companies are often viewed primarily through the lens of funding.
Capital certainly matters.
Copper exploration in mountainous terrain demands extensive drilling, geophysical surveys, and logistical support, all of which can quickly consume tens of millions of dollars.
But Hedalen believes the greatest value may lie elsewhere.
Access to BHP’s technical expertise could significantly accelerate exploration across Kobrea’s extensive land package.
“This partnership provides more than funding; it gives us access to BHP’s world-class technical team. With a large portfolio of targets, our focus is on advancing exploration systematically and efficiently, and BHP’s capital and expertise will help us accelerate that process,” Hedalen said.
Working alongside one of the world’s most experienced copper exploration teams provides access to decades of geological knowledge, exploration models, and project evaluation capabilities that would otherwise be difficult for a junior explorer to replicate.
The missing piece of the Andes
To understand why Mendoza is attracting renewed attention, it helps to step back and view the broader Andean copper belt.
Chile remains the world’s largest copper producer, accounting for roughly one-quarter of global mined copper output.
Argentina, despite sharing much of the same geological architecture, has historically contributed comparatively little.
San Juan has changed that perception in recent years through the emergence of several large copper discoveries.
Mendoza sits immediately south.
Geologically, many believe the province shares the same ingredients that made neighbouring districts successful.
The difference has been access.
For decades, companies simply couldn’t drill.
“As recently as two years ago, the common view was that while Mendoza had outstanding geological potential, securing drill permits would be too difficult to advance projects,” Hedalen recalled.
“We received the first permits for these projects in 2025. The reforms in Mendoza have changed that view.”
A province looking beyond oil
The implications extend well beyond Kobrea.
Mendoza has traditionally relied on conventional oil production as one of its economic foundations.
As mature oil fields decline and activity shifts elsewhere in Argentina, provincial leaders have sought alternative long-term industries capable of supporting employment and investment.
Mining has increasingly become part of that strategy.
According to Hedalen, the province deliberately identified copper as a future economic driver before reopening parts of the Western Malargüe Mining District.
“The province’s strategy has been to reopen the district with a focus on copper. Exploration is the first step, but the long-term objective is to build a sustainable, operating mining industry in Mendoza,” he said.
If exploration ultimately leads to new mines, the benefits could extend well beyond direct mining jobs.
Infrastructure development, local procurement, engineering services, transport, and hospitality all tend to expand alongside major mining investment.
Even at the exploration stage, Kobrea says it employs predominantly Argentine workers while sourcing most goods and services locally.
“We’re already contributing to the local economy through local employment, procurement, and ongoing exploration activity,” Hedalen said.
Validation for Mendoza
One of the most significant outcomes of the BHP partnership may be what it signals to the wider mining industry.
Major miners are typically cautious when entering new jurisdictions, particularly where permitting history has previously created uncertainty.
BHP’s willingness to establish a position in Mendoza could therefore influence how other companies assess the province.
For Hedalen, the partnership validates not only Kobrea’s exploration thesis but also Mendoza’s policy reforms.
“This partnership reinforces Mendoza’s emergence as a credible mining jurisdiction,” he said.
“Major mining companies are disciplined and selective in how they allocate capital. Their decision to partner here reflects confidence in both the province’s geological potential and the framework the Mendoza Government has established.”
If additional companies follow, Mendoza could begin attracting the broader exploration ecosystem that has long existed across the border in Chile and neighbouring San Juan.
The province could move from being viewed as an exploration outlier to becoming an emerging copper district in its own right.
Timing the copper cycle
The partnership also arrives as long-term copper fundamentals continue to strengthen.
Demand from electrification, renewable energy infrastructure, battery storage, AI data centres, and expanding electricity grids is expected to drive significant growth in global copper consumption over coming decades.
Many industry analysts believe the world will require numerous new tier-one copper discoveries to satisfy future demand.
Yet such discoveries have become increasingly rare.
Existing copper districts are mature, permitting timelines continue to lengthen, and exploration success rates remain low.
Against that backdrop, frontier jurisdictions capable of delivering entirely new copper camps have become increasingly attractive.
Mendoza represents one of the few regions where geological potential exists alongside relatively limited historical drilling.
For Kobrea, the alliance with BHP brings the funding and technical capability needed to accelerate exploration across the Western Malargüe Copper Projects.
With a district-scale land package, multiple porphyry targets, and a major partner now involved, Kobrea Exploration is well positioned to advance Mendoza’s emergence as a significant new copper district.
Write to Bruno Venditti at Mining.com.au
Images: Kobrea Exploration
