نتایج جستجو برای: neo tethyan subduction
تعداد نتایج: 19930 فیلتر نتایج به سال:
Evidence of at least ten different tectonic- controlled sedimentary basins can be recognized in the central part of the Alborz Mountains in the Middle part of the Alpine-Himalayan belt. They formed from Neoprotrozoic to recent time as the results of the relative plate motion in southwest of Asia in Tethyan realm. The basins include: (1) Prototethys Late Neo-Proterozoic to Early Ordovician epi-c...
The isotope geochronology of isochronously deposited Cambrian strata from different tectonostratigraphic zones of the Himalaya confirms new stratigraphic, sedimentological, and faunal evidence indicating that the Himalaya was a single continental margin prior to collision of India with Asia. Lesser, Greater, and Tethyan Himalaya represent proximal to distal parts of a passive continental margin...
The paranthurid genus Curassanthura, represented to date by three species, has an intriguing distribution in anchialine and interstitial habitats on both sides of the North Atlantic. It has been suggested (Wagele, 1985) that the genus is a Tethyan relict, and that its present-day distribution is the result primarily of continental drift. The material reported here, from Cura<;ao, Jamaica, and B...
The Truong Son orogenic belt (TSOB) is one of the most important belts in Indochina block. There are numerous mafic to felsic intrusions Early Paleozoic caused by Tethyan orogeny. However, tectono-magmatic evolution TSOB still unclear. In this paper, zircon U-Pb dating, whole-rock geochemistry, and Sr-Nd isotopic data magmatic rocks have been systematically investigated explore petrogenesis tec...
Paleocene–Eocene record of ophiolite obduction and initial India-Asia collision, south central Tibet
[1] Uppermost Cretaceous to Eocene marine sedimentary sequences occur both to the south and north of the Yarlung Zangbo suture in south central Tibet. They consist of Indian-margin strata of the northern Tethyan Himalaya and Asian-margin strata of the Gangdese forearc. Both assemblages are characterized by major changes in depositional environment and sedimentary provenance at 65 Ma and an appe...
When and how the collision between India-Asia occurred continue to be debated. We report new paleomagnetic data (Ds = 158.8°, Is 7.8°, ks 81.3, α95 5.1°, N 11 sites) from limestone of Zongpu Formation Member I in Tingri, which indicate that Tethyan Himalaya was situated at 3.9 ± 2.6°S during 62-59 Ma. This implies Greater India ∼900 km did not break off India, left a ∼2,000 Neo-Tethys Ocean cha...
Abstract The Longshou Shan of western China is the northern backstop Cenozoic Himalayan-Tibetan orogen and occupies a key linkage between Tarim continent North craton which separate pre-Cenozoic Tethyan orogenic system Central Asian system. Therefore, Paleoproterozoic–Paleozoic evolution this region critical to understanding extent overprinting deformation, construction Eurasian continent, rela...
The Salt Range, in Pakistan, preserves an insightful sedimentary record of passive margin dynamics along the NW Indian Plate during Mesozoic. This study develops provenance analyses Upper Triassic (Kingriali Formation) to Lower Jurassic (Datta siliciclastics from and Trans Indus ranges based on outcrop analysis, petrography, bulk sediment elemental geochemistry, heavy-mineral data. sandstones a...
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