نتایج جستجو برای: transtensional tectonics
تعداد نتایج: 3692 فیلتر نتایج به سال:
In the Central IranianVolcanic Belt (CIVB), north-west of Shahre-Babak, in the area of Javazm, Dehaj and khabr, about 60 subvolcanic porphyritic dacitic to rhyodacitic domes (1-10 km2) are intruded into a variety of rock sequences from Mesozoic to Early Miocene in age. These rocks are a part of Dehaj-Sardoieh belt. The CIVB contains intrusive and extrusive rocks of Cretaceous-Quaternary age. Ge...
The offshore Tumbes-Guayaquil forearc basin in the accretionary prism of Northern Peru-Southern Ecuador shows evidence gravity-driven large-scale deformation systems active during Late Neogene-Quaternary period. Subsurface data and construction eight structural cross-sections show that ∼8 km-thick Oligocene-Quaternary sedimentary infill is detached seaward completely decoupled from underlying i...
we present new whole major and trace elements data for a suite of adakitic dacite to rhyolite rocks from the sahand region. these rocks formed in the pliocene to pleistocene during the the collision between the arabian and eurasian plates following subduction of neo–tethys ocean. these subvolcanic intrusions were emplaced into late cretaceous and eocene sedimentary، volcano–clastic and volcanic...
in the central iranianvolcanic belt (civb), north-west of shahre-babak, in the area of javazm, dehaj and khabr, about 60 subvolcanic porphyritic dacitic to rhyodacitic domes (1-10 km2) are intruded into a variety of rock sequences from mesozoic to early miocene in age. these rocks are a part of dehaj-sardoieh belt. the civb contains intrusive and extrusive rocks of cretaceous-quaternary age. ge...
Abstract The Plio-Quaternary tectonic evolution of the central sector Sicilian Channel and resulting morphostructural setting have been analyzed using a large geophysical dataset consisting multichannel seismic profiles, which some them never published, available bathymetric data. This area hosts two regional-scale domains that registered complex pattern deformation occurred since Early Pliocen...
The concept of tectonics has always been dependent on the duality between technology and representation. Botticher (1852) acknowledged the tectonic duality between structure and cladding. Semper (1951), conversely, highlighted the role of the joint in tectonics within its four elements of earthwork, hearth, framework–roof and enclosing membrane. His approach promoted the essence of the presence...
Shear zones geometry in the Paraíba do Sul belt, southeastern Brazil, delineates a NE-trending fan-like structure. Shear zones dip towards SE in the northern limb, and towards NW in the southern one. This geometry has been interpreted either due to transpression or to late folding of flat-lying thrust surfaces. Stretching lineation plunges to ENE-ESE in the northern limb and towards NNE-NE in t...
The complex deformation styles of large intraplate strike-slip fault systems in the multi-stage superimposed basin are hot topics worldwide. This article proposes structural models and evolution processes for such Tarim Basin based on high-resolution 3D seismic data deep wells. Our analyses reveal that formed with different five tectonic layers from Sinian to Permian accompanies rift uplift, Lo...
Plate kinematic reconstructions available for the Late Jurassic-Early Cretaceous eastward drift and counterclockwise rotation of Iberian plate imply a major left-lateral motion Iberia with respect to Eurasia. According most authors, this displacement has been accommodated along transform North Pyrenean Zone. However, no relevant field evidence exists proposed >400 km horizontal Fault. Several P...
Strike-slip deformation belts are interesting structures in the crust and of significance petroleum exploration. The Shunbei 5 fault belt (SB5), a long strike-slip Tarim Basin, played an important role formation recently discovered major oilfield known as oilfield. In this study, models plan view vertical profile were established to interpret SB5 with multi-cycled tectonic activities. To end, i...
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