ESS 101 Lecture Notes - Lecture 3: Subduction, Rhyolite, Diorite
15 Apr 2016
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Document Summary
Inorganic (1) form during crystallization of magmatic melt (molten rock/basalt) + crystallized from minerals from a partial melt of asthenosphere (too small for naked eye) Andesite = crystallization of minerals from partial melt of basaltic ocean crust. Porphyrite andesite: small black minerals (crystallizes first) highest melting temperature, larger white minerals, smaller minerals in gray matrix (crystallizes last) lower melting temp. (2) minerals can precipitate directly from aqueous solution. Ex: salt deposits from desert playa lake. Arrangement of atoms define crystal form of the mineral. If the crystal can grow in unrestricted environment. Mineral quartz (glassy) do not form well - defined: pyramidal shaped crystals. Quartz are last to crystallize in granite. Mt is lower compared to other minerals in granite. Each energy level can hold a specific number of electrons. 1st - 2 e- / 2nd - 8 e- / 3rd - 8 e: elements can have multiple isotopes. Transition metals (middle of periodic table) may have multiple valencies.
