Metamorphism, metamorphic rocks, and hydrothermal rocks
Metamorphism, metamorphic rocks, and hydrothermal rocks
... recrystallize into stable ones • Rocks produced from pre-existing or parent rocks in this way are called metamorphic rocks bread toast Metamorphic Rocks • Metamorphic rocks common in the old, stable ... Hydrothermal processes add water for metamorphic reactions • Formation of hydrothermal rocks • Water passes through rocks and precipitates new minerals on walls of cracks and in pore spaces • Metallic ... plate and bow up where magma rises Hydrothermal Processes • Rocks precipitated from or altered by hot water are referred to as hydrothermal – Common at spreading centers (under water) • Hydrothermal...
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CH 07 METAMORPHISM METAMORPHIC ROCKS AND HYDROTHERMAL ROCKS
... Metamorphism, Metamorphic Rocks, and Hydrothermal Rocks Physical Geology 10/e, Chapter Steve Kadel, Glendale Community College Metamorphic Rocks • Metamorphism refers to solid-state changes ... pre-existing or parent rocks in this way are called metamorphic rocks • Metamorphic rocks common in the old, stable cores of continents, known as cratons Factors Controlling Metamorphic Rock Characteristics ... Texture and mineral content of metamorphic rocks depend on: – – – – Parent rock composition Temperature and pressure during metamorphism Effects of tectonic forces Effects of fluids, such as water...
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Metamorphism, metamorphic rocks, and hydrothermal rocks
... stable ones • Rocks produced from pre-existing or parent rocks in this way are called metamorphic rocks • Metamorphic rocks common in the old, stable cores of continents, known as cratons Metamorphic ... of hydrothermal rocks • Water passes through rocks and precipitates new minerals on walls of cracks and in pore spaces • Metallic ore deposits often form this way (veins) 3) Plate Tectonics and ... Processes 1) Factors Controlling Metamorphic Rock Characteristics • Texture and mineral content of metamorphic rocks depend on: – – – – Parent rock composition Temperature and pressure during metamorphism...
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Metamorphism, metamorphic rocks, and hydrothermal rocks (2)
... http://www.lonelyplanet.com/mapshells/europe/scottish_highlands _and_ islands/scottish_highlands _and_ islands.htm http://www.clan-mackenzie.co.uk/graphics/highl Scottish Highlands http://www.scotland.de/photos/073l Scottish Highlands http://www.kentleton.evesham.net/Photo/03/0 ... http://www2002.stoke.gov.uk/museums/pmag/Nof_website1/natural_history_static_exhibitions/identifying_rock_minerals _and Barrovian Metamorphism Amphibolite Schist http://www2.vscc.cc.tn.us/svinson/geo100/library /metamorphic/ large/amphibolite.jpg Measuring Metamorphic Intensity Zones and Facies Metamorphic rocks ... in manufacturing Geologically, metamorphic rocks and minerals are valuable because they serve as barometers of temperature and pressure conditions of the times and places where they formed –...
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Metamorphism, metamorphic rocks, and hydrothermal rocks
... stable ones • Rocks produced from pre-existing or parent rocks in this way are called metamorphic rocks • Metamorphic rocks common in the old, stable cores of continents, known as cratons Metamorphic ... of hydrothermal rocks • Water passes through rocks and precipitates new minerals on walls of cracks and in pore spaces • Metallic ore deposits often form this way (veins) 3) Plate Tectonics and ... Processes 1) Factors Controlling Metamorphic Rock Characteristics • Texture and mineral content of metamorphic rocks depend on: – – – – Parent rock composition Temperature and pressure during metamorphism...
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Metamorphism, metamorphic rocks
... difference between the parent rock and the metamorphic rock Physical Geology Metamorphic Rocks Foliated Metamorphic Rocks Non-foliated Metamorphic Rocks Slate Anthracite Coal Phyllite Hornfels ... rock - the original rock from which a metamorphic rock was formed Parent rocks may be igneous, sedimentary, or metamorphic metamorphic grade - the intensity of metamorphism, measured by the degree ... Physical Geology Controls on Metamorphic Characteristics Temperature Physical Geology Controls on Metamorphic Characteristics Pressure Physical Geology Controls on Metamorphic Characteristics...
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Metamorphism and Metamorphic Rocks
... (blueschist and eclogite metamorphism) Regional metamorphism Zone where wet fractional melting starts Contact metamorphism Figure 8.18 BE ABLE TO SKETCH THIS, AND EXPLAIN Plate Tectonics And Metamorphism ... under the coast of Alaska and the Aleutian Islands Figure 8.18 1-burial metamorphism; 2-high p, low T metamorphism Plate Tectonics And Metamorphism (3) Regional metamorphism: where continental ... burial metamorphism As temperatures and pressures increase, burial metamorphism grades into regional metamorphism Regional Metamorphism A Consequence of Plate Tectonics Regional metamorphism...
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metamorphism and metamorphic rocks 0
... re-crystallize into new minerals • new rocks are metamorphic rocks • metamorphism occurs at depth; cannot see metamorphic rocks unless they are uplifted metamorphic rocks: controlling factors • parent ... surrounding rocks and transports dissolved material and ions time • metamorphism may take millions of years • longer times allow new minerals to grow larger coarser grained rocks metamorphic rocks: ... pressures and temperatures forms rocks of higher metamorphic grade other types of metamorphism (less common) partial melting during metamorphism • produces migmatites, which have both intrusive and metamorphic...
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Metamorphic facies and metamorphosed mafic rocks
... the mantle Metamorphic Facies 2) Facies of medium pressure • Most exposed metamorphic rocks belong to the greenschist, amphibolite, or granulite facies • The greenschist and amphibolite facies conform ... garnet), characterizing this facies Sanidinite facies is not evident in basic rocks Mafic Assemblages of the High P/T Series: Blueschist and Eclogite Facies Mafic rocks (not pelites) develop definitive ... that characterize each facies (for mafic rocks) Table 25-1 Definitive Mineral Assemblages of Metamorphic Facies Facies Definitive Mineral Assemblage in Mafic Rocks Zeolite zeolites: especially...
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SEDIMENTARY ROCKS, METAMORPHIC ROCKS, AND AGE DETERMINATION
... absolute age dating • determination of amounts of radioactive parent and stable daughter Relative Age dating SED-MET ROCKS -AGE • Age determination method • relative and absolute age determination ... ROCKS -AGE • Age determination (geologic age) • important concepts used • relative age concepts • crosscutting and intrusive nature of igneous rocks • law of superposition pertaining to sedimentary ... and pressure are equally important in the metamorphic process and includes a much larger area of metamorphism—higher temperatures would form a higher grade of metamorphic rock SED-MET ROCKS-AGE...
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Metamorphic rocks foliations, and lineations
... Metamorphic Rocks Foliations, and Lineations Topics • Fabrics • Foliation, cleavage, lineation – Cleavage and Folds – Geometry – Strain significance ... Recrystallization • Shear zones Geothermal Gradient and Metamorphism Naming of Metamorphic Rocks Slatey cleavage Gneiss Looks Like Bedding, but is it? Metamorphic layering Broosk Range, AK Isoclinal ... cleavage development and dissolution Courtesy of David Gray, Monash University, Australia Sandstone after compaction Beginning of foliation Crenulation Cleavage Small scale kinks and pressure solution...
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Northwest igneous and metamorphic rocks
... recrystallization Weathering, Erosion Melting Metamorphic Rocks Burial, metamorphism, recrystallization Sedimentary Rocks Northwest Igneous and Metamorphic Rocks Cascade Volcanoes (recent) Cascade ... Outline Igneous Rocks Sedimentary Rocks Metamorphic Rocks Rock Identification Lab Rock Cycle Crystallization at depth or extrusion at surface Igneous Rocks Sediments Lithification ... surface Igneous Rocks Sediments Lithification Magma Burial, metamorphism, recrystallization Weathering, Erosion Melting Metamorphic Rocks Burial, metamorphism, recrystallization Sedimentary Rocks...
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Metamorphic rocks in thin section
... polarized light, 40x NNH-3 Actinolite in a greenstone Like most monoclinic amphiboles actinolite has birefringence in the lower 2nd order Twinning, possibly relic from the original augite, can be seen ... Cummingtonite in a hornblende - biotite - cummingtonite amphibolite Like most monoclinic amphiboles, birefringence is in the lower second order Cross polarized light, 100x Q-603C Cummingtonite in ... pleochroic chlorite This grain has prominent twinning, evident in parallel stripes having somewhat different pleochroic colors Plane polarized light, 20x IMA96-C1-1 Chloritoid in a muscovite-chlorite...
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A classification of metamorphic rocks
... A Classification of Metamorphic Rocks • Metamorphic rocks are classified on the basis of composition (either mineralogical or chemical) and texture Mineralogy and Chemistry • Mineralogy and ... equant minerals such as feldspar and quartz ✦ Gneissic rocks are generally coarse grained ✦ Most commonly used to describe high-grade metamorphic rocks such as gneisses Classification of Metamorphic ... Metamorphic Rocks Porphyroblastic means that a metamorphic rock has one or more metamorphic minerals that grew much larger than the others Each individual crystal is a porphyroblast Foliated Metamorphic...
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chapter 7 metamorphic rocks
... Art 7. 1 Figure 7. 5 New Minerals form New minerals are: Platy Elongate Figure 7. 6 Figure 7. 18 Effects of temperature and pressure Figure 7. 3 Pressure Figure 7. 4b Figure 7. 4a Figure 7. 1 Figure 7. 7a ... Figure 7. 7b Figure 7. 8a Marble Figure 7. 8a2 Marble in thin section Figure 7. 9 Quartzite Figure 7. 10a Slate Figure 7. 10b Slate Figure 7. 11 Phyllite Figure 7. 12 Garnet-mica schist Figure 7. 13 Gneiss ... Figure 7. 14 Contact metamorphism vs Regional metamorphism Figure 7. 23 Figure 7. 17 Isotherms: Figure 7. 19 Metamorphism at the mid-oceanic ridge: Figure 7. 20 Figure 7. 15 Gneiss: Figure 7. 8b Marble:...
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