Popular in Geol 113-2
Popular in Geology
This 2 page Class Notes was uploaded by Katie Thedford on Tuesday September 20, 2016. The Class Notes belongs to 20841 at Fort Lewis College taught by Allie Jackson in Fall 2016. Since its upload, it has received 5 views. For similar materials see Geol 113-2 in Geology at Fort Lewis College.
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Date Created: 09/20/16
Geology – Igneous Minerals Mineral Resources- o Useful minerals that are economically recoverable o Ores are minerals from which metals can be extracted at reasonable cost. o Industrial minerals are mined for use in paving, building, abrasives, fertilizers, ceramics, etc. What is a Mineral? o Naturally occurring o Solid o Orderly Crystalline Structure o Definite Chemical composition o Inorganic substance There are around 4000 named minerals, but only several dozen are abundant – called the rock forming minerals- and only 8 make up an abundance of earth’s crust Most common silicate minerals o Olivine – single tetrahedron o Pyroxene – single chains o Amphibole – double chains o Mica (biotite and muscovite) - sheets o Feldspars (orthoclase and plagioclase) – 3dimensional framework o Quartz – 3 dimensional framework o Clay - sheets Non-silicate minerals o Carbonates – fizz under acid! Calcite o Oxides- oxygen bonded with a metal Hematite (iron oxide) o Halides- evaporites Halite (table salt) o Sulfides- metals bound to sulfide ions Pyrite (fool’s gold) o Sulfates- meal combined with sulfate ion Gypsum o Phosphates o Native Elements 2
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