Abstract
Resource rich nations across the African continent consistently occupy the least economically rewarding position in global mineral supply chains. They extract while others refine. They supply raw material while others manufacture. The engineering labor, the technical infrastructure, and the majority of the profit generated from that extraction flow outward, leaving behind the environmental costs and a fraction of the revenue the minerals could command if processed domestically. This thesis examines that pattern through the specific case of Tanzania, a country whose mineral endowment in gold, graphite, nickel, and rare earth elements is substantial, and whose capacity to capture value from that endowment through domestic processing remains severely limited despite decades of extraction, investment, and reform.
The central argument is that Tanzania’s processing gap cannot be adequately explained by a deficit of technical expertise or engineering infrastructure alone. It is a sociotechnical problem, meaning the technical constraints and the political economic arrangements that surround them are mutually constituted and cannot be addressed independently. Energy unreliability, an underdeveloped engineering workforce, and weak enforcement of domestic processing mandates are not separate failures. They are the compounded material expression of institutional arrangements that were designed, beginning in the colonial period and reinforced through post-independence structural adjustment policy, to keep production outside the continent. Treating the problem as primarily technical, as development policy has often done, consistently produces interventions that address symptoms without reaching their cause.
The research draws on three frameworks from Science and Technology Studies to build this analysis. World Systems Theory locates Tanzania within a global economic hierarchy in which peripheral nations export raw materials while core nations control processing, manufacturing, and the institutional infrastructure that mediates access to advanced technology. Dependency Theory examines how that structural position is actively reproduced through specific mechanisms: investment agreements favoring extraction over capacity development, financing arrangements that prevent small scale operators from accessing formal credit, and technology licensing terms designed to limit what knowledge transfers to the host country. Neocolonial theory addresses the persistence of external economic direction even after formal political independence, most evident in the gap between Tanzania’s legislative authority over its mining sector and its practical ability to enforce domestic processing requirements against multinational corporations with significant contractual leverage. The methodology is a thematic analysis of peer reviewed scholarship, government policy documents, civil society reports, ethnographic fieldwork data, and mineral production statistics, including a comparative analysis with the Democratic Republic of Congo. The DRC case is instructive precisely because it complicates the assumption that building processing infrastructure resolves structural dependency. The country has substantially more domestic refining capacity than Tanzania, yet a 2019 government decree mandating domestic processing of copper and cobalt concentrates was reversed within weeks due to energy constraints, and the majority of existing processing infrastructure remains owned by foreign multinationals. The economic benefit of refining was leaving the country regardless of where the physical facilities were located.
The findings establish that Tanzania’s mineral processing gap is the outcome of a system in which political economic arrangements and technical deficits reinforce each other across every stage of the analysis, from the colonial restructuring of the mining sector around export, through World Bank driven liberalization in the 1990s, through the partial but incomplete gains of the 2017 Mining Acts. The 2017 reforms produced real progress in state revenue and equity stakes in major operations, but left the underlying energy infrastructure, human capital, and institutional enforcement gaps unresolved. Reform at the policy level has consistently outpaced reform at the structural level.
The implications of this research are relevant beyond Tanzania. As global demand for critical minerals accelerates with the expansion of renewable energy systems and artificial intelligence hardware, the terms under which mineral rich nations participate in those supply chains will shape development trajectories across the continent. This thesis argues that durable progress requires restructuring investment agreements to condition financing on domestic processing and enforceable technology transfer, linking energy infrastructure investment to engineering education investment, and recognizing that the leverage to change these conditions sits primarily with the institutions and governments of core zone economies. For practitioners in materials engineering, the research reframes processing decisions as sociotechnical ones in which the structural conditions surrounding a technical solution are as consequential as the solution itself.
