PPT-Metasomatism Metamorphism

vs Metasmatism Metamorphism All CHANGES in SOLID STATE that takes in a Preexisting rock as a result of changes in PT and chemical env fluids under which the preexisting formed. 10 NO 25 JANUARY 201 254 e mail himalfesgmailcom When did India Asia collide and make the malaya A K Jain Central Building Research Institute Roorkee 247 667 India Critical evaluation and comparison of the available geological and geochronological Metamorphic Rocks . Are Composed of Sedimentary, Igneous, or Metamorphic Minerals that Have Recrystallized.. Marble from Carrara, Italy. Pre-existing sedimentary, igneous, or metamorphic rock changed to a new assemblage of minerals. . Metamorphism. Metamorphic rocks: appear to have changed in their structure or chemical composition since their creation or formation.. Originally sedimentary or igneous. Altered by heat, pressure, or exposure to hot fluids in earth’s crust. Foliated . textures. Texture refers to the size, shape, and arrangement of grains within a rock. Foliation. – any planar arrangement of mineral grains or structural features within a rock. Examples of foliation. LOWER-GRADE REGIONAL METAMORPHICS. Slate, Phyllite, . “Greenstone” and Schist. 2. Metamorphic Rock Definition. A sedimentary, igneous, or previously existing metamorphic rock which has undergone textural, structural, and/or mineralogical changes due to the action of one or more agents of metamorphism. 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) . Modification of Rocks by Temperature and Pressure. . Chapter 6. . Oceanic crust. Continental. lithosphere. Continental. crust. Mantle lithosphere. Asthenosphere. Pressure. (kilobars). Depth. 0 km. 30. GLY 2010 - Summer 2016 - Lecture 11. 2. Metamorphism. The mineralogical, chemical, and structural adjustment of solid rocks to physical and chemical conditions. 3. Metamorphic Rock. Any rock derived from pre-existing rocks by mineralogical, chemical, and/or structural changes, essentially in the solid state . Bell ringer: . Looking at the pictures, what do you think metamorphic rocks are? . What are Metamorphic Rocks? . Metamorphism means “to change form”.. Metamorphic rocks are rocks that form when . Spring 2016. 2. Important Note. Material from this review may appear on the final examination, in the same or somewhat altered . form. Questions are on the body of the slide. Answers are in the notes section – this allows you to quiz yourself before checking the answer. Metamorphism. :. . the process that creates metamorphic rocks. .. . All made from the alteration of existing rocks by excessive…. . pRESSURE. . AND/OR . Our estimates of pressures and temperatures experienced by rocks during metamorphism are based on metamorphic reactions.. Mineral Reactions. There are two basic types of mineral reactions:. Continuous. pelitic. rocks. . What is the Metapelites?. Metapelites. ,. . are metamorphic rocks, which derived from contact or regional metamorphism of . shale or mudstones. (clay rich sediments). . . . Metapelites. exhumation. . of. . continental. . crust. in . the. Alps. Nikolaus Froitzheim. Institut für Geowissenschaften. Universität Bonn. 1. . Deep. . subduction. . or. . tectonic. . overpressure. ?.