نتایج جستجو برای: sahneh ophiolites
تعداد نتایج: 388 فیلتر نتایج به سال:
[1] The Eocene India-Eurasia collision is a first order tectonic event whose nature and chronology remains controversial. We test two end-member collision scenarios using coupled global plate motion-subduction models. The first, conventional model, invokes a continental collision soon after 60 Ma between a maximum extent Greater India and an Andean-style Eurasian margin. The alternative scenari...
A microtectonic study was conducted in the Levac region of central Serbia. Here, tectonic contacts between Europe?derived units, including Serbo-Macedonian unit and Jurassic sedimentary cover European margin, Eastern Vardar Ophiolitic unit, are exposed at surface. The results indicate that contact zone underwent least two ductile contractional deformation phases. older contraction associated wi...
The western segment of the suture zone between Yangtze and Cathaysia blocks, which is most important tectonic boundary related to formation rifting south China, enigmatic not fully understood due sporadic exposure Precambrian strata ophiolites. Three-dimensional electrical resistivity models derived from inversion magnetotelluric data identified a lithospheric-scale conductive extending northea...
A model for the tectonic evolution of the Eastern Mediterranean region from Mesozoic to Present is developed from geological, geophysical, and seismological data on and surrounding the island of Cyprus. This model emphasizes the role of major transform structures in accommodating horizontal plate motions, driven from the west by spreading along the Atlantic-Arctic mid-ocean-ridge system and fro...
[1] Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) analyses of B and Li in serpentinized peridotites from the Feather River Ophiolite (California) indicates that B is enriched in serpentine minerals compared to the whole-rock and less altered olivine grains, while Li in serpentine is depleted or comparable to whole-rock Li. The high B contents of serpentine minerals cor...
Chemistry of detrital garnets, chrome spinels and tourmalines of 30 selected samples in combination with the general heavy mineral distribution from 523 sandstone samples of the Upper Cretaceous to Eocene Gosau Group of the eastern part of the Eastern Alps and the western West Carpathians result in an advanced picture of sedimentary provenance and palaeogeographic evolution of that area. Garnet...
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