If humanity reaches 91 billion people by 2050 it will

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Unformatted text preview: ity reaches 9.1 billion people by 2050, it will be using the biological capacity of two Earths. Minerals in every day life Material consumption per capita (USA vs. the world) Origin of mineral deposits •  Hydrothermal mineral deposits (e.g., Cu, Zn, Ag) •  Magma.c mineral deposits (e.g., Cr, Fe, Ni, V,Ti) •  Sedimentary minerals (e.g., NaCl, CaSO4, BIFs) •  Placers – high density mineral concentrated by flowing water along the shoreline (gold, plaHnum, zircon, diamonds) •  Residual mineral deposits – concentrated by chemical weathering processes (limonite=FeOH.OH; gibbsite=Al(OH)3); bauxite is gibbsite ­rich laterite Plate tectonics and mineral deposits Hydrothermal deposits Placer minerals ConIlict minerals Inefficiency of use and laws of thermodynamics Grow food, get to work, make clothing, heat the home, light the streets, build houses... Energy sources vs. consumption Energy sources and consumption •  World oil consumpHon world average ~10 barrels/person/years USA average ~50 barrels/person/years Developing co...
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