geological processes producing minerals

• hydrothermal deposition, metamorphic processes and Proterozoic marine sediments are all processes that help to produce minerals
• existing rocks that are exposed to extreme heat and pressure from nearby igneous activity may change form without melting in metamorphic processes
• Hydrothermal deposition is a igneous process that forms minerals: igneous Intrudions produce pressurised superheated water, this dissolves many minerals from the surroundings. The mineral rich solutions travel along fissures away from igneous batholith. They begin to cool, minerals In the solution crystallise. This gives rise to fractional crystallisation
• Sedimentary processes creating crystals involve minerals settling and building up producing layers of deposited sediment
• Sedimentary process of alluvial deposits: alluvial processes involve materials that have been carried and separated by flowing water
• Sedimentary process of evaporites: Bay of an ancient sea is isolated the water then evaporates leaving crystallised minerals
• Sedimentary process of secondary enrichment: many economically important metal from minerals are soluble or insoluble based on the conditions they are in e.g. o2 availability
• Sedimentary process of biological sediments involves e living organisms forming mineral deposits
• Proterozoic marine sediments mostly occurred between 2.5 and 1.8 billion years ago
• igneous intrusion is a rock formed from magma that cools and solidifies in earths crust