Metamorphisme de contact pdf

On observe souvent une zone qui entoure lintrusion appelee aureole. Les gradients ne doivent pas etre confondus avec des geothermes ou des paleogeothermes. Chapiter 1 metamorphisme et roches metamorphiques 2. Callegari, department of science, mineralogy and petrology, university of torino, italy. Contact metamorphic rocks recommendations by the iugs subcommission on the systematics of metamorphic rocks. Svt terminale s assistance scolaire personnalisee et. Le metamorphisme est une transformation sans fusion. Relations entre tectonique, metamorphisme et mise en place. Les temperatures seront plus elevees dans les roches immediatement au contact et en diminuant progressivement vers les zones distales. The contact aureoles produced in siliceous limestones and dolomites. Contact metamorphism is usually restricted to relatively shallow depths low pressure in the earth because it is only at shallow depths where there will be a large contrast in temperature between the intruding magma and the surrounding country rock.

Oct 06, 2015 this feature is not available right now. Petrologie metamorphique stu3 cours td et exercices. All structured data from the file and property namespaces is available under the creative commons cc0 license. Determining the illite crystallinity index allows geologists to designate what metamorphic facies and metamorphic zone the rock was formed in and to infer what temperature the rock was formed. Callegari, department of science, mineralogy and petrology, university of torino, italy 2. Other articles where contact metamorphism is discussed. Metamorphisme et roches metamorphiques by ben chir issuu. This is an easy name to recall if you remember that these. Livre metamorphisme et geodynamique cours et exercices. Il y a presence dun dome thermique qui fait remonter lesisothermes. Files are available under licenses specified on their description page. Quelques remarques sur le metamorphisme et les roches sy. Amphiboles occur in contact metamorphic aureoles around igneous intrusions.

Aug 01, 2012 issuu is a digital publishing platform that makes it simple to publish magazines, catalogs, newspapers, books, and more online. Dans les dorsales, les solides anhydres peuvent fondre. Illite crystallinity is a technique used to classify lowgrade metamorphic activity in pelitic rocks. Metamorphism is the change of minerals or geologic texture distinct arrangement of minerals in preexisting rocks protoliths, without the protolith melting into liquid magma a solidstate change. Ces changements resultent des conditions physiques etou chimiques qui di.

An aureole is the zone surrounding an intrusion, which is a mass of igneous rock that solidified between other rocks located within the earth. Contact metamorphism is a type of metamorphism where rock minerals and texture are changed, mainly by heat, due to contact with magma. As discussed previously, contact metamorphism occurs as a result of a high geothermal gradient produced locally around intruding magma. Easily share your publications and get them in front of issuus.

Lassistance scolaire personnalisee utilise des cookies pour vous offrir le meilleur service en savoir plus. The chemical components and crystal structures of the minerals making up the rock may change even. Resume le massif granitique hercynien du ment, est situe dans le maroc central septentrional. Metamorphism is the change of minerals or geologic texture distinct arrangement of minerals in preexisting rocks, without the protolith melting into liquid magma a solidstate change.

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