-The igneous process produce gold, silver, copper, mercury, lead, platinum, and nickel.
-As a large magma body cool, the heavy minerals that crystallize early tend to settle to the lower portion of the magma chamber.
-Pegmatites are very coarse-grained igneous rocks.
-Most pegmatites are granitic in composition and consist of unusually large crystals of quartz, feldspar, and Muscovite.
-Some magmas become enriched in iron or occasionally copper instead of pegmatite.
-Diamonds originate at depths of nearly 200 km, where the confining pressure is great enough to generate this high-pressure form of carbon.
-Hydrothermal solutions are the hot, watery solution that escapes from a mass of magma during the latter stages of crystallization.
-Vein Deposit- A mineral filling a fracture or fault in a host rock.
-Disseminated deposit- Any economic mineral deposit in which the desired mineral occurs as scattered particles in the rock but in sufficient quantity to make the deposit an ore.
-Many of the most important metamorphic ore deposits are produced by contact metamorphism.
-The most common metallic minerals associated with contact metamorphism are zinc, lead, copper, and iron.
-Secondary enrichment is the concentration of minor amounts of metals that are scattered through unweathered rock into economically valuable concentrations by weathering processes.
Notes 643-647
Mineral Resources and Igneous Processes
-The igneous process produce gold, silver, copper, mercury, lead, platinum, and nickel.
-As a large magma body cool, the heavy minerals that crystallize early tend to settle to the lower portion of the magma chamber.
-Pegmatites are very coarse-grained igneous rocks.
-Most pegmatites are granitic in composition and consist of unusually large crystals of quartz, feldspar, and Muscovite.
-Some magmas become enriched in iron or occasionally copper instead of pegmatite.
-Diamonds originate at depths of nearly 200 km, where the confining pressure is great enough to generate this high-pressure form of carbon.
-Hydrothermal solutions are the hot, watery solution that escapes from a mass of magma during the latter stages of crystallization.
-Vein Deposit- A mineral filling a fracture or fault in a host rock.
-Disseminated deposit- Any economic mineral deposit in which the desired mineral occurs as scattered particles in the rock but in sufficient quantity to make the deposit an ore.
-Many of the most important metamorphic ore deposits are produced by contact metamorphism.
-The most common metallic minerals associated with contact metamorphism are zinc, lead, copper, and iron.
-Secondary enrichment is the concentration of minor amounts of metals that are scattered through unweathered rock into economically valuable concentrations by weathering processes.