Results 181 to 190 of about 51,740 (216)
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SYN- TO POST-OROGENIC EVOLUTION OF COLLISIONAL MOUNTAIN SYSTEMS
2022This dissertation is composed of three distinct manuscripts which collectively investigate processes that contribute to the late evolution of collisional mountain systems —specifically, the ancient Appalachian-Caledonian system. In the first paper, 40Ar/39Ar thermochronological data are used to constrain the timing of exhumation of the Scandian ...
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COLLISIONAL AND OROGENIC GRANITOIDS OF KAZAKHSTAN
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings, 2020Ravil Gadeev +3 more
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Chapter 11 Proterozoic Collisional and Accretionary Orogens
1992Publisher Summary During the Proterozoic, two types of orogenesis were in operation. One involved the collision of two or more continental blocks and gave rise, where collision was orthogonal, to orogens with thickened and commonly uplifted and eroded crust and to much reworking (by thrusting and partial melting) of older continental crust.
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Late-orogenic backfolding and extension in the Brooks Range collisional orogen, northern Alaska
Journal of Structural Geology, 2002Abstract New structural observations across a crustal section spanning relatively unmetamorphosed fold–thrust belt rocks and epidote–amphibolite grade rocks document the late-orogenic kinematic history of the Brooks Range, Alaska, and provide insight into the character, relative timing, and geodynamic setting of late-orogenic backfolding and ...
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Tectonics and sedimentology of accretionary and collisional orogens
Journal of Asian Earth Sciences, 2022Wenjiao Xiao +5 more
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Gondwana Research, 2003
Abstract NW-SE trending paleotectonics are recognized from the WNW-ESE trending Qinling complex in the core of the Qinling belt. They consist of trending stratum, boundary shear zones, deformed linear plutons and ophiolite. The field relationships and ages of the deformation, magmatism and metamorphism suggest that the paleotectonics formed in ...
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Abstract NW-SE trending paleotectonics are recognized from the WNW-ESE trending Qinling complex in the core of the Qinling belt. They consist of trending stratum, boundary shear zones, deformed linear plutons and ophiolite. The field relationships and ages of the deformation, magmatism and metamorphism suggest that the paleotectonics formed in ...
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The impact of faulting and folding on earthquake cycles in collisional orogens
2023Faults and folds are geologic expressions of plate tectonic activity. They accommodate relative motion between two or more tectonic plates, are responsible for catastrophic hazards like earthquakes and tsunamis, and build mountain chains that fabricate Earth?s aerial landscapes.
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Contrasting subduction modes in the Variscan collisional orogen
2015The Variscides of Europe and N-Africa represents a classical collisional orogen (400-300 Ma) caused by the prolonged convergence of the continents of Gondwana and Laurussia. Orogen wide exposures of continental (ultra) high pressure units proves the presence of subduction processes concomitant with the accretion of unsubductable microcontinental blocks
Kroner, U., Romer, R.
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A non‐collisional, accretionary Sveconorwegian orogen – Reply
Terra Nova, 2013Slagstad, Trond +4 more
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