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S06 Lec5a rocksmet

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Information about S06 Lec5a rocksmet
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Published on January 14, 2008

Author: Urania

Source: authorstream.com

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Metamorphic Rocks:  Metamorphic Rocks Rocks Under Stress Metamorphism:  Metamorphism Recrystalization Solid-State Chemical Reactions No Melting Factors that affect Metamorphism:  Parent Rock Composition Temperature Pressure Fluids Factors that affect Metamorphism Factors that affect Metamorphism:  Parent Rock Composition Temperature Pressure Fluids Factors that affect Metamorphism Factors that affect Metamorphism:  Parent Rock Composition Temperature Pressure Fluids Factors that affect Metamorphism Lithostatic pressure Directional Pressure Directed Pressure Results in::  Directed Pressure Results in: Foliation Foliation Under a Microscope:  Foliation Under a Microscope Metamorphic Grade:  Metamorphic Grade Factors that affect Metamorphism:  Parent Rock Composition Temperature Pressure Fluids Factors that affect Metamorphism Types of Metamorphism:  Types of Metamorphism High T, Low P Metamorphism:  High T, Low P Metamorphism Contact Metamorphism Increase of T and P Together:  Increase of T and P Together Regional Metamorphism Regional Metamorphism:  Regional Metamorphism Lots of Hot Fluids:  Lots of Hot Fluids Hydrothermal Metamorphism Metamorphic Rocks - Identification:  Metamorphic Rocks - Identification Metamorphic Textures (All Crystalline):  Metamorphic Textures (All Crystalline) Foliated Nonfoliated Foliation:  Foliation Composition - Minerals:  Composition - Minerals Foliated Metamorphic Rocks:  Foliated Metamorphic Rocks Nonfolited Metamorphic Rocks:  Nonfolited Metamorphic Rocks Metamorphic Rocks - Interpretation:  Metamorphic Rocks - Interpretation Metamorphic Rock “Translations”:  Parent Rock Composition Temperature Pressure Fluids Type of Metamorphism Metamorphic Rock “Translations” Metamorphic Rock “Translations”:  Metamorphic Rock “Translations” Chemical Composition Mineral Composition Texture: Foliation Parent Rock (Protolith) T & P of Formation (Depth, Type, & Facies) T & P of Formation (Depth, Type, & Facies) Chemical Composition - Parent Rock (Protolith):  Chemical Composition - Parent Rock (Protolith) Overall chemical composition of the protolith is the same as the metamorphic rock created. Protolith Felsic Mafic All Quartz All Calcite Metamorphic Rock Felsic Mafic Quartz Calcite NonFoliated Rocks:  NonFoliated Rocks Parent Rock Limestone Marble (Low to High Grade) Nonfoliated Rocks (cont.):  Nonfoliated Rocks (cont.) Quartzite Metacoglomerate Parent Rocks Sandstone Conglomerate Mineral Composition - Index Minerals:  Mineral Composition - Index Minerals Felsic Protolith Mineral Composition - Mineral Assemblages:  Mineral Composition - Mineral Assemblages Mineral Composition - Geothermometers:  Mineral Composition - Geothermometers Rock Forms: 500-550°C Mineral Composition & Texture tell us about Metamorphic Environments (= Metamorphic Facies):  Mineral Composition & Texture tell us about Metamorphic Environments (= Metamorphic Facies) Metamorphic Facies:  Metamorphic Facies Facies and Rock Type:  Facies and Rock Type Foliated Metamorphic Rocks:  Foliated Metamorphic Rocks Parent Rock - Shale Slate (Low Grade) Phyllite (Low Grade) Foliated Rocks (cont.):  Foliated Rocks (cont.) Phyllite (Low Grade) Schist (Medium Grade) Foliated Rocks (cont.):  Foliated Rocks (cont.) Felsic Parent Rock Gneiss (High Grade) Migmatite (Very High Grade) Metamorphic Facies:  Metamorphic Facies Intermission: Quiz What Can you say about the history of this rock?:  Intermission: Quiz What Can you say about the history of this rock? Schist Metamorphism of a shale parent rock under medium grade metamorphic conditions. (Specific index minerals would tell you specific T & P.) Intermission: Quiz What Can you say about the history of this rock?:  Intermission: Quiz What Can you say about the history of this rock? Marble Metamorphism of a limestone parent rock. Grade could be low, medium or high. Parent rock formed in a shallow tropical ocean. Rock Cycle:  Rock Cycle Magma Igneous Rocks Sedimentary Rocks Metamorphic Rocks Sediment Crystallization Melting Metamorphism Lithification Weathering Erosion Transport Deposition

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