GEOL 101 Lecture Notes - Lecture 34: Sylvite, Talc, Aluminium Oxide
Document Summary
Plate tectonics and deposits: plate tectonic settings control which types of mineral deposits (metallic and nonmetallic) will form. Magmatic ore formation: few important metal ores crystallize straight out of magma, these can only form mineable deposits when the ore minerals are separated out into concentrated bodies or layers. Porphyry copper: ultra hot water and dissolved metals separate from a batch of felsic magma, the hot water is channeled through conduits that became veins as the water reacts with rocks above plutons. !1: 90% of the world"s bauxite is equatorial (australia, guinea, jamaica, brazil, india) Friday, april 21, 2017: alumina (al2o3) produced from ore, converted into al through electrolytic reactions and mixing with other materials. Hall-heroult process: named after two guys from 1886 who invented the method (independently at the same time, charles hall (american, 23 years old, paul heroult (french, 23 years old)
