The metal-rich Vazante-Paracatu Mineral Belt, in central Brazil, hosts the Zn-Pb sulfide Morro Agudo District Mesoproterozoic (1.3–1.1 Ga) upper carbonate sequence of Vazante Group. district is comprised deposit and Bento Carmelo, Sucuri, do Capão occurrences. This also Fagundes, Ambrósia Bonsucesso deposits (northern part) zinc silicate North Extension (southern part). structurally controlled,...

For the purpose of nondestructive measurements hazardous heavy-element-containing substances in soil samples, emerging technique, triple-exposure X-ray computed tomography (CT), is proposed. The use triple exposure (i.e. three different acceleration voltages for tube) improves accuracy identification atomic number a heavy element. With lead as target element, virtual microtomography simulations...

Anthropogenic inventories for copper (229 ± 89 ug/cm2, N = 30), and mercury (470 ± 307 ng/cm2, N = 25) in Lake Superior sediments are much greater than inventories in remote lakes (Cu 50 ± 31 ug/cm2, Hg 64 ± 34 ng/cm2, N = 16) that receive inputs largely from long-distance atmospheric sources. Whereas the absolute concentration of mercury in Lake Superior sediments is not high (80–110 ng/g), en...

Onzon-Kanbani area is a western flank of Mogok Metamorphic Belt where gold mineralization is hosted as auriferous quartz-vein with epithermal low-sulphidation characters. Mineralization is closely associated with NE-SW trending fracture or shear zone probably related to the dextral movement of the Sagaing Fault system. Mineralization related hydrothermal alteration is developed as narrow zones ...