Development of ferruginous duricrusts (canga) in tropical iron ore systems
Supergene iron ore systems are enriched in iron oxides by the weathering of banded iron formations and are capped by a ferruginous duricrust known as canga. Pre-mining, canga controls the topography of iron ore systems, promotes hill slope stabilisation and hosts a unique ecosystem. Therefore canga remediation post mining has been identified as a key target for the rehabilitation of iron ore mines. Alan Levett's PhD research aims to determine the role of microorganisms in canga genesis and to accelerate the biogeochemical cycling of iron to stimulate goethite cementation.