The Growing Importance of Critical Minerals for the Energy Transition and U.S. Supply Chain Security

Abstract The transition to low-carbon energy systems has significantly increased global demand for critical minerals such as copper, lithium, cobalt, nickel, graphite, and rare earth elements (REEs). These minerals are essential for electric vehicles, renewable energy systems, and defense applications. However, their supply chains face mounting challenges due to limited domestic production, high geographic concentration, and growing geopolitical risks. This study provides a comprehensive and valuable review of the current critical mineral landscape, with a focus on U.S. vulnerabilities and emerging opportunities. This paper examines the mineral applications across various energy sectors, global production sources (including natural extraction, manufacturing by-products, and recycling), and reserve distributions. It further evaluates the U.S. supply situation, highlights active and planned domestic mining projects, and reviews recent federal policies aimed at strengthening mineral security. Unconventional resources, such as geothermal fluids and mine tailings, as well as future exploration, are also examined for their long-term potential, alongside a discussion of the associated technical and economic challenges. In this paper, we demonstrate the role of petroleum engineers, particularly in adapting subsurface engineering, produced fluid handling, and integrating expertise to enable critical mineral recovery. The results highlight a growing mismatch between supply and demand for critical minerals. The U.S. heavily relies on imports for many of these minerals, with several countries like China, Chile, and DR Congo dominating the supply of REEs and battery materials. Expanding domestic production is hindered by protracted permitting processes, environmental and community concerns, and capital investment hurdles. These findings underscore the urgent need for strategic actions, including supply chain diversification, accelerated permitting reform, investment in domestic refining capacity, and innovation in extraction technologies. By capitalizing on existing energy infrastructure, utilizing interdisciplinary expertise, and aligning policy with long-term resource planning, the U.S. can strengthen its critical mineral supply chain and advance its energy transition goals with greater resilience and sustainability.