GLG321-08Lesson1

GLG321-08Lesson1 - 1 Mineralogy GLG 321 SLN 34377 Lesson 1...

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Unformatted text preview: 1 Mineralogy GLG 321 SLN 34377 Lesson 1 slides Professor: Thomas Sharp Teaching Assistant: Wyatt DuFrane What is a mineral? Naturally occurring 2 Naturally Occurring High-pressure minerals Shock metamorphism: when asteroids collide. Ringwoodite occurs in shocked meteorites. High pressure polymorph (form) of olivine (Mg,Fe) 2 SiO 4 High pressure synthesis MgSiO 3-perovskite We can make many high-pressure compounds in the laboratory. including:ringwoodite and MgSiO 3-perovskite 3 Ringwoodite occurs in the mantle transition zone and (Mg,Fe)SiO 3- perovskite in the lower mantle. Perovskite has not been found in nature Earth structure (Mg,Fe)SiO 3- perovskite Ringwoodite What is a mineral? Naturally occurring Crystalline solid 4 Crystalline: atoms arranged in a 3-D periodic ordered crystal structure. Non-crystalline: atomic arrangement lacks long-range order = amorphous (glassy) material In the meteorite Tenham, there are amorphous grains of (Mg,Fe)SiO 3 (Xie et al., 2006)(Xie et al....
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GLG321-08Lesson1 - 1 Mineralogy GLG 321 SLN 34377 Lesson 1...

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