PPT-1 Petrology Lecture 7

MidOcean Ridge Volcanism GLY 4310 Spring 2017 2 MOR System 3 MOR Spreading Rates 4 Oceanic Crust CrossSection Figure 135 Modified after Brown and Mussett 1993 The Inaccessible Earth An Integrated View of Its Structure and Composition Chapman amp Hall London. EarthEarth Oceanic Intraplate Volcanism. GLY 4310 - Spring, 2016. 2. Hot Spots, Trails, and . Aseismic Ridges. Figure 14.1. . Map of relatively well-established hotspots and selected hotspot trails (island chains or aseismic ridges). Hotspots and trails from Crough (1983) with selected more recent hotspots from Anderson and Schramm (2005). Also shown are the geoid anomaly contours of Crough and Jurdy (1980, in meters). Note the preponderance of hotspots in the two major geoid highs (superswells).. Igneous Rock Textures. GLY 4310 - Spring, . 2016. 2. Primary. Form during solidification. They result from interactions between mineral crystals and melt. 3. Secondary. Develop by alteration of the rock after crystallization. Introduction to Metamorphism. GLY 4310 - Spring, 2016. 2. Metamorphism Definition. “The mineralogical, chemical, and structural adjustment of solid rocks to physical and chemical conditions which differ from the conditions under which the rocks in question originated” (from the Glossary of geology, 2nd edition) . Igneous Structures and . Field Relationships. GLY 4310 - Spring, 2016. 2. Viscosity and Temperature. Anhydrous rhyolitic magma . 1400. °. C - 10. 5. poise. 1000. °. C - 10. 8. poise. 3. Viscosity and Composition. Mid-Ocean Ridge Volcanism. GLY 4310 - Spring, 2016. 2. MOR System. 3. MOR Spreading Rates. 4. Oceanic Crust Cross-Section. Figure 13-5 . Modified after Brown and . Mussett. (1993) . The Inaccessible Earth: An Integrated View of Its Structure and Composition. Chapman & Hall. London.. Oceanic Intraplate Volcanism. GLY 4310 - Spring, 2017. 2. Hot Spots, Trails, and . Aseismic Ridges. Figure 14.1. . Map of relatively well-established hotspots and selected hotspot trails (island chains or aseismic ridges). Hotspots and trails from Crough (1983) with selected more recent hotspots from Anderson and Schramm (2005). Also shown are the geoid anomaly contours of Crough and Jurdy (1980, in meters). Note the preponderance of hotspots in the two major geoid highs (superswells).. Introduction to Metamorphism. GLY 4310 - Spring, 2017. 2. Metamorphism Definition. “The mineralogical, chemical, and structural adjustment of solid rocks to physical and chemical conditions which differ from the conditions under which the rocks in question originated” (from the Glossary of geology, 2nd edition) . Classification and Nomenclature of Igneous Rocks. . GLY 4310 - Spring, 2017. 2. Igneous Textures. Phaneritic:. Crystals are readily visible with the unaided eye.. Aphanitic:. Crystals, if present, are too small to be seen with the unaided eye.. In . Geotechnics. & Applied Geology. Enrollment no. Name Guided By . 130610106006 . Chaudhary. . Dinesh. K. Prof. . V.R.Sharma. 130610106007 . Metamorphic Facies. GLY 4310 - Spring, 2017. 2. Alternative Assemblages, Oslo. MgSiO. 3. + CaAl. 2. Si. 2. O. 8. = CaMgSi. 2. O. 6. + Al. 2. SiO. 5. . . En. + An = Di + And. Introduction to Petrology Francis 2014 Introductory Petrology EPSC-212B Don Francis: Room: F.D.A. 316, donald.francis@mcgill.ca Documents : www.eps.mcgill.ca /~c212 1. Igneous . 7: . Continental Flood . Basalts, . Island Arc . Magmatism and . Continental Arc Magmatism. Tamer Abu-Alam. University . of . Tromsø. – The Arctic University of . Norway. Tamer.abu-alam@uit.no. . Study . rocks and . minerals. Do geological . field . work. A Little Bit About . Me …. Professor Bob Dymek. Central Kansas. SE Missouri. Virginia. Adirondacks. Labrador. NW Territories. Québec.