Juniors vs. majors: who really develops lithium projects in the Puna

Two players, one value chain

Developing a lithium project is rarely the work of a single company. In practice, the industry operates as a chain of specialization in which each link takes on a different type of risk. Junior explorers focus on the early stages —property acquisition, geological prospecting, drilling and resource studies— while the major miners step in once a project has proven technically viable and requires the capital-intensive push to build and operate.

This division is no accident: it reflects very different risk and financing profiles. A junior can sustain itself with tens of millions of dollars raised in venture capital markets; a commercial-scale lithium carbonate plant demands investments that typically range between 500 million and 1 billion dollars, a range only majors or large integrated traders can comfortably afford.

What a junior does and why it is indispensable

Junior explorers are, in essence, discovery companies. Their value lies not in producing lithium but in generating and testing geological information that reduces uncertainty about a salt flat. Through drilling campaigns, brine analysis and hydrogeological modeling, they transform speculative ground into a measured, audited resource under international standards such as NI 43-101 or the JORC code.

This work is extremely high-risk: most prospects never reach production. But when a junior confirms competitive lithium grades, low magnesium and manageable impurity levels, and an aquifer with sufficient flow, it creates an asset that can appreciate enormously. That is precisely the point at which the project becomes attractive to a larger partner.

What majors bring beyond capital

Reducing the role of major miners to financing would be a mistake. Majors bring engineering capacity to design complex processing plants, operational experience in brine management, and —increasingly decisive— access to markets and offtake contracts with battery manufacturers and automakers. This commercial link is what secures the sale of production even before the plant is completed.

They also bring credibility with regulators and communities. A project backed by a company with a track record in environmental management, community relations and regulatory compliance carries a different risk profile than a junior with no operating history. In brine lithium, where water management is a sensitive issue, this credibility matters as much as the financial balance sheet.

The mechanisms that connect the two

The transition from discovery to production is structured through well-defined financial instruments. The most common are joint ventures, in which the major finances development in exchange for a majority stake; earn-in agreements, where equity is earned by investing committed amounts in stages; and direct acquisitions, when the large miner buys the junior or the project outright.

Each structure distributes risk and reward differently. A junior that negotiates well can retain part of the upside through royalties or minority stakes while transferring the burden of construction capital to the major. The price of that deal usually reflects how advanced the project is: the more defined the resource and the more complete the feasibility studies, the more value the junior captures.

The risks and imbalances of the model

The scheme is not without tensions. Juniors depend on volatile financing cycles: when the lithium price falls, venture capital retreats and many promising projects stall for lack of funds to reach the next stage. This dependence exposes them to selling stakes at unfavorable moments or to over-diluting their shareholders.

For majors, the risk is of a different nature: entering too late makes acquisition more expensive, and entering too early means taking on the very geological uncertainty they prefer to avoid. The balance of this relationship largely defines which projects actually reach production and which fall by the wayside.

How this dynamic plays out in Argentina's Puna

Argentina, the world's fifth-largest lithium producer, is a paradigmatic case of this articulation. The Puna region of Catamarca, Salta and Jujuy concentrates low-operating-cost salt flats, where numerous junior explorers —many of Australian and Canadian origin— sustained for years the exploration campaigns that now feed the project pipeline. On that discovery base, large international companies provided the capital for the plants in operation and under construction.

The RIGI, in force since 2024, added a relevant variable to this equation by offering fiscal stability and benefits for large-scale investments, a framework designed precisely for the capital-intensive investments that characterize majors. For the local ecosystem, the challenge is to consolidate a chain in which juniors find financing to explore and large miners find predictability to produce. On that balance depends whether the Puna turns its geological potential into sustained production.