EAS201 Lecture Notes - Lecture 23: Carbon Footprint, Diavik Diamond Mine, Eclogite
20 Sep 2016
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Document Summary
Principal mineral substances, grouped according to use (table 17. 1)[pdf posted] Mineral deposit (or resource): any volume of rocks containing an enrichment of one or more minerals. Ore (or ore deposit): a profitable mineral deposit, consisting of ore minerals + gangue. Enrichment factors needed to form an ore ( commodity ) Ex. ) guy gunned down a bunch of people, next day the oil price shot up. Processes of enrichment to form mineral deposits and ores: (1) magmatic processes (intrusive and extrusive) [diamonds, gold] (2) hydrothermal activity [gold] (3) metamorphism [gold] (4) sedimentary / diagenetic processes [gold] (5) weathering. Placer gold: sedimentary deposit of gold with high density (was actually an igneous deposit) Diamond is 10 on the moh"s hardness scale. Graphite and diamond are polymorphs of carbon. Diamond formation: in earth"s mantle below ~160 km depth. Volcanic eruptions are conveyer belts and carry the diamonds up with them.
