نتایج جستجو برای: basement tectonics
تعداد نتایج: 16212 فیلتر نتایج به سال:
This contribution deals first new ICP-MS U–Pb zircon ages that indicate Middle- and Late Triassic magmatic episode tectonometamorphic events, respectively, for the central Patagonia region, instead of a Paleozoic history as previously estimated. The Calcatapul Formation consists (meta-) volcano-sedimentary syn-rift sequence deposited unconformably, shortly after extensional Gondwanide orogenic ...
The Potwar sub-basin is an important hydrocarbon producing zone of the Upper Indus basin and has significant oil gas potential. Balkassar area main field mainly produced from Eocene carbonates. Chorgali Formation age reservoir rock in this area. Structurally, complicated, surface features often do not reflect subsurface structures. This due to presence detachments at different levels. In such c...
Continental carbonates, such as travertines and tufas, formed from CO 2 -rich groundwater degassing it emerges at the Earth’s surface, are often associated with major crustal-scale faults. The Carraclaca site, in Lorca-Totana section of Alhama de Murcia Fault, Spain, presents a complex geomorphological landscape controlled by active tectonics. geology here records interaction between Quaternary...
Sediment delivery and supply are explicitly controlled by variations in broad-scale processes such as climate, tectonics eustasy. These turn influence fluvial hinterland evolution. A bespoke multi-proxy approach (integrating apatite zircon U-Pb geochronology, trace elements apatite, Pb-in-K-feldspar provenance tools) coupled with outcrop investigation is used to constrain the temporal trends se...
The lateral distribution of the magnetic layer beneath Tarim Craton and its environs was estimated from spectral analysis using newest high-resolution aeromagnetic dataset mainland China, which is enlarged by EMAG2. As a proxy, Curie point depth (CPD) provides comprehensive view crust-scale thermal regime, accounted for at magnetite becomes paramagnetic, correspondence CPD with tectonic regime ...
Abstract In this article, novel geochronological (U–Pb SHRIMP) and geochemical data are presented from the lowermost sandstone unit (Par formation), basement granites of Gwalior Basin sandstones Bhopal Basin, located along margins Archaean Bundelkhand Craton. The variation diagrams imply that units in Basins were deposited rift-induced passive margin tectonic settings. contrast to magmatic feat...
Abstract The low-grade metamorphic early Paleozoic basement of the Veitsch area presents a wide variety sedimentary facies domains. first domain consists thick metadacites Middle Ordovician age (Blasseneck Porphyroid), overlain by fine-grained metaclastics Rad Formation (Late to Silurian) and Devonian limestones calcitic marbles (Kaiserstein Kaskögerl Formation, respectively). Rhyolitic dacitic...
We present an overview of the relation between mantle dynamics and plate tectonics, adopting the perspective that the plates are the surface manifestation, i.e., the top thermal boundary layer, of mantle convection. We review how simple convection pertains to plate formation, regarding the aspect ratio of convection cells; the forces that drive convection; and how internal heating and temperatu...
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