inscription
Portail d'information géographique

Résultats de la recherche (39 résultats)

Affinez votre recherche

Par Collection Par Auteur Par Date Par Sujet Par Titre
  • Tectonic and magmatic evolution of the eastern Karakoram, India
  • Crétacé ; Foraminifère ; Géochimie ; Géologie régionale ; Inde ; Karakoram ; Roche volcanique ; Stratigraphie ; Subduction ; Tectonique ; Tectonique de plaques
  • Geochemical characteristics of the Eden Lake Complex : evidence for anorogenic magmatism in the Trans-Hudson Orogen
  • Canada ; Géochimie ; Géologie régionale ; Magma ; Manitoba ; Roche éruptive
  • Etude géochimique du Complexe d'Eden Lake qui fait intrusion dans les roches granitiques localisées entre les domaines tectoniques de Lynn Lake et de Leaf Rapids, dans la Zone de Reindeer du terrane orogénique trans-hudsonien, Manitoba septentrional
  • Magmatism and tectonics in Iceland. Special issue
  • Cénozoïque ; Dyke ; Faille ; Faille transformante ; Géomorphologie structurale ; Islande ; Rift ; Roche volcanique ; Tectonique
  • Afrique du Sud ; Australie ; Cape Province ; Concept ; Erosion chimique ; Espagne ; Fracture ; Galicia ; Granite ; Lithologie ; Météorisation ; Roche moutonnée ; Roche volcanique ; South Australia ; Tectonique
  • Australia ; Cape Province ; Chemical erosion ; Concept ; Fracture ; Galicia ; Granite ; Lithology ; Roche moutonnée ; South Africa ; South Australia ; Spain ; Tectonics ; Volcanic rock ; Weathering
  • to the evolution of etch forms, exploits magmatic, thermal, tectonic and sedimentary bedrock features at various scales, and of greater or lesser antiquity. It is more accurate and appropriate to view etchforms as complex and multistage features, some of which have
  • Magmatic gases extracted and analysed from ocean floor volcanics
  • Evidence for variability of magmatic processes and upper mantle heterogeneity in the axial region of the mid-atlantic ridge near 22 and 36 N
  • C/C and S/S ratios in magmatic gases from ridge volcanism in Afar
  • Interactions between magmatism and tectonics in Iceland : a review
  • Magmatism and tectonics in Iceland. Special issue
  • Iceland is often assumed to be a good analogue to study the oceanic ridges. This short review highlights strong differences in terms of deformation pattern and magmatism distribution. These differences come from the large magma supply induced
  • and oceanic rift and thus remains the perfect object to analyse the interactions between magmatism and extension.
  • Analyse isotopique ; Antilles ; Carbone ; Carbone 13 ; Cours d'eau ; Dioxyde de carbone ; Eau souterraine ; Erosion chimique ; Géochimie ; Météorisation ; Petites Antilles ; Roche volcanique ; Traceur
  • –rock interactions. Chemical weathering is clearly, at least, partly controlled by the input of magmatic CO2, either under hydrothermal (hot) or surficial (cold) weathering regimes. This study shows that the contribution of magmatic CO2 to chemical
  • Analyse chimique ; Analyse des correspondances ; Analyse factorielle ; Analyse multivariée ; Diagramme de variation ; Généralités sur la géographie ; Madagascar ; Pétrogenèse ; Pétrologie ; Roche volcanique ; Volcanisme
  • and consequently to choose the most interesting indications for establishing simple two-dimensional diagrams| accessorily to verify the used terminology. So, for every series a two dimensional diagram is proposed allowing to follow the magmatic evolution during
  • Tholeiitic basalt-rhyolite magmatism and massive sulphide deposits at Matagami, Quebec
  • Magmatic evolution of the northern Antarctic Peninsula in Gondwana Five. Selected papers and abstracts of papers.
  • Anorogenic magmatism and the Grenvillian Orogeny
  • Metamorphose und Magmatismus in Venn-Stavelot-Massiv, Ardenen. (Metamorphosis and magmatism in the Venn-Stavelot-Massif, Ardennes)
  • Appennino ; Cénozoïque ; Expansion des fonds océaniques ; Géochimie ; Géologie régionale ; Italie ; Mer Tyrrhénienne ; Miocène ; Pétrographie ; Roche volcanique ; Tectonique de plaques ; Volcanisme
  • to a distance of 1500 km from the studied sections, can be considered as the possible source of this layer. Nevertheless, tectono-magmatic evidence suggests that it may represent the witness of the activity of a calc-alkaline submarine volcanic arc located
  • A detailed study of granitic rocks round Zaria suggests that they are largely of magmatic origin. (EMS).
  • Orogenetic geosynclinal and magmatic cycles are controlled by worldwide lateral motions. To the end of herzynian cycle are in the area of Werdau-Hainichen trough and permocarboniferous basins in the northwestern part of CSSR eight or ten changes
  • of tectonic course. In times of dilation and while changes of tectonic direction intruded Hercynian magmatic bodies. (HL).
  • Magmatism and tectonics in Iceland. Special issue
  • The interaction of the Mid-Atlantic Ridge with the North Atlantic Mantle Plume has produced a magmatic plateau centered about Iceland. After a brief review of the tectonics of slow-spreading ridges, the AA. introduce the geological framework
  • According to the regional structural-tectonic and magmatic situation on the territory of the MPR there are three metallogenetic provinces. The mineralizations are essentially bound to the Caledonian, Hercynian and Mesozoic mineralization epochs. (HL).
  • The reasons for the initiation of many landforms can in many instances be traced to various magmatic, thermal, tectonic, and sedimentological events, some of which took place in distant geological time. Many landforms are in reality multistage
  • Magmatic and metamorphic events, imprinted in the crystalline rocks of the so-called core mountains inside the Alpine structure of the Inner Carpathians, allow the re-construction of the history of the Rheic Ocean opening, its development and its
  • final closure. All magmatic suites, mafic and felsic, present in the Carpathians core mountains, show similarities to those found in the European Variscan Belt. All described- and dated metamorphic and magmatic events also have equivalents
  • ; Extinction masse ; Faille détachement ; Faille normale ; Fracturation ; Lithosphère ; Magmatisme anorogénique ; Manteau ; Marge continentale passive ; Morphologie ; Océanisation ; Ouverture océan ; Panache ; Rhéologie ; Rifting ; Roche ignée ; Roche
  • Crustal thinning ; Tilted blocks ; alkalic composition ; anorogenic magmatism ; asthenosphere ; continental crust ; deformation ; detachment faults ; fracturing ; igneous rocks ; lithosphere ; mantle ; morphology ; normal faults ; ocean opening
  • The Pan-African (800-500 Ma) Older Granite suite of Nigeria is dominated by calc-alkaline, I-type magmatism and is a product of subduction processes at the eastern margin of the West African craton. The Kanoma and Sabon Gida composite plutons of NW
  • The granitoides of the southern part of the GDR may be considered as crustal anatexites generated in connection with the posttectogenic tectono-magmatic activation together with a regional metamorphism and postmagmatic ore deposits. The supply
  • On the basis of the petrologic characteristics and the lithostratigraphy of the Precambrian-Lower Palaeozoic metamorphites of the Ore Mountains the development of sedimentation areas and the chronological and regional course of tectonic, magmatic
  • The AA. report tectonic settings and geological features of Patagonia briefly and discuss some structural and geomorphological aspects that could be used to infer directions of magmatic flow of nearly horizontal lavas and to test stability of rock
  • . These ideas are supported by the magmatic development in this region. The ascertained processes of the structural development in this region. The ascertained processes of the structural development are well fitting into the Lower Permian picture of movements
  • to shields, the type of the shelf crust exists, as illustrated by Central and Western Europe. The geosynclinal, tectogenetic and magmatic development conditioned by the drift in this shelf crust region is described in outline. The geotectonic events
  • seems to be controlled by magmatic influences as well as by the effect of temperature on groundwaters.
  • is older than those previously established on ophiolite sedimentary covers from this segment of the western Alps. This chronological relationship implies either a late seafloor spreading-related magmatic activity in places younger than adjacent initial
  • the magmatic plumbing system from the upper mantle to the crust of the Northeast Honshu arc.
  • The Sila Massif (Calabria, southern Italy) is a high-standing plateau with a rolling upland surface lying between 1000 and 1900 m. It is underlain by magmatic and metamorphic rocks thrusted over Mesozoic carbonate and terrigenous units. The Sila
  • glacial erratics from neighbouring fields above all representative of the magmatic and metamorphic genetic groups of rock. It is with a view to describing the cognitive, educational and geotouristic role this new object is playing that the present article