Abstract The present study is carried out to probe geodynamic evolution and tectonic history of A-type granitoids from the Riwasa and Nigana areas in the Tusham Ring Complex (TRC), western Peninsular India on the basis of petrological and geochemical aspects. The investigated rocks have the characteristics of hypersolvus, calc-alkaline, peraluminous and A-type granitoids. They are enriched in SiO2

Abstract Copper mineralization in Kahang porphyry mining district as a tectonically active region in the center of Iran, at the middle of Urmia–Dokhtar magmatic assemblage (UDMA), has been drastically controlled by structural lineaments. Determination of these footprint features is a good guide to identify the location of ore occurrences. One way to recognize lineaments is to process satellite imagery

Abstract Study of morphometric parameters such as stream length (Lu) and stream length ratios (Rl), bifurcation ratio (Rb), drainage density (D), form factor (Rf), circularity ratio (Rc), elongation ratio (Re) and asymmetry factor (Af) in the Gola and Kalsa River Basins show a strong structural/tectonic control over the drainage in the study area and also indicate intense tectonic activity in the recent

Abstract The Siang valley in the eastern part of Arunachal Himalaya contains Paleocene–Eocene sediments of Yinkiong Group along with the Abor volcanic exposed in a wide lateral extent in the middle and lower Siang valleys. Based on available geologic data and detail geologic mapping present study proposes a new evolution model of the basin in the context of India–Asia collision tectonics. Integration

Abstract—Granitoids and dikes of Svyatoy Nos pluton of Cape Svyatoy Nos in the northwestern part of Verkhoyansk-Kolyma folded area, cutting terrigenous and volcanogenic-sedimentary rocks of Upper Jurassic–Lower Cretaceous, are considered. Obtained U‒Pb SIMS geochronological data on zircons from granitoids and dike rocks indicate, that their crystallization ages correspond to Aptian‒Albian (119–111

Abstract The paper discusses the results of petrogeochemical and geochronological studies of the Tainsky granitoid stock containing the Tainsky gold deposit in the East Sayan. The Tainsky granitoid stock intrudes through ultrabasites of the Ospa-Kitoi ultrabasitic massif. Granitoids are the part of the ophiolite cover which overlap Archean basement rocks of the Tuva-Mongolian microcontinent of the

Abstract The new administrative capital city area in Egypt, planned to be constructed in the area between Cairo and Suez cities, is vulnerable to moderate and strong earthquakes, which are inevitable in the region. The moderate size recent earthquake with local magnitude 4.2 took place in the vicinity of administrative capital area on 31st of December 2018. The focal mechanism and ground motion characterization

Abstract—Mesozoic‒Cenozoic tectonic zoning and its evolution are characterized by analysis of geological data on the Black Sea–Caucasus–Caspian region. The following tectonic zones were located in succession to the north of the Mesotethys Ocean in the Early Jurassic: the mobile zone on the Hercynian basement; the Moesian–Black Sea–Trans-Caucasus minor plate with the Precambrian–Baikalian basement,

Abstract An assemblage of mafic granulites (schists), plagiogneisses, and metasedimentary rocks, which is referred to as the Filla Series, is exposed in the Rauer Islands (opposite the eastern coast of the Prydz Bay). The chemistry and Nd isotope composition of the schists, which are interpreted as metavolcanics, are characterized; the results of U–Th–Pb dating (SHRIMP) of zircons from these rocks

Abstract Majority of the Iraqi Kurdistan Region is a mountainous area with relief differences that attain up to 1000 m, and locally more. The presence of dense net of rivers, streams and large valleys with diverse lithologies have initiated hundreds of mass movements of different types and sizes, active and dormant. In the current study, we have selected different landslides from different parts of

Abstract The tectonic features of the Baltic–Mezen shear zone that developed along the border of the Fennoscandian Shield and the Russian Plate in the north of the East European Platform are considered. It is established that tectonic evolution of the considered zone was associated with strike-slip displacements in the basement rocks, which occurred and were dispersed in cover deposits in the form

Abstract— The article provides geological data on the morphostructural differentiation of sedimentary basins and the results of tectonophysical and digital modeling reflecting the shape and possible mechanisms of this process. It is shown that morphostructural differentiation is the fundamental property of sedimentary basins, associated with interaction of rock masses in the basement–sedimentary cover

Abstract Satellite gravimetry is recognized now as powerful and reliable tool for regional tectono-geodynamic zonation. The studied region contains intricate geodynamical features (high seismological indicators, active rift systems and collision processes), richest structural arrangement (existence of mosaic blocks of oceanic and continental Earth’s crust of various age), and a number of high-amplitude

Abstract Extension parallel to fold axis represents a rarely documented tectonic process that occur in different tectonic settings such as large-scale orogenic belts, mountain ranges, and thrust and fold belts. Along the Ecuadorian Andes, extensional systems have only been reported as tectonic boundaries of local intermontane basins, pull-apart depressions and outer-arc stretching faults along hinge

Abstract The thrust-nappe belt in the Western Ordos Basin is located in the northern segment of the North‒South structural belt in the mainland China. It is the junction of different tectonic units. The structural evolution of the region is significant to the knowledge of regional geology as well as to oil and gas exploration initiatives. However, due to insubstantial data, the structural evolution

Abstract— Detrital zircons from quartzite–schist sequences of the Aktau–Mointy Massif (Central Kazakhstan), which occur in various structural positions relative to the Early Neoproterozoic felsic volcanics, were studied. The obtained U–Pb zircon dating results suggest similarity of detrital zircon age populations with a lower limiting depositional age of 1220 Ma in all quartzite–schist sequences. The

Abstract In the Trollfjord–Rybachy–Kanin fault zone, the major convergent suture between the East European and West Arctic platforms, on the isthmus of Cape Vestnik located between the Sredny and Rybachy peninsulas, in the Riphean terrigenous sequence, massifs of disintegrated granitoids have been identified, primarily belonging to the Archean crystalline basement and which subsequently underwent tectonic

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Abstract In many instances the sulphide mineralization is associated with quartz vein-related hydrothermal alteration zone. The syntectonic quartz veins display preferred orientation as their intrusion is controlled by normal stress (σn) acting across the foliation/fracture planes and the fluid pressure (Pf) of the quartz veins. The Pf and paleostress (ϕ = tectonic stress ratio) are measurable by using

Abstract The article proposes a model of collisional and accretionary events of the Neoproterozoic at the western margin of the Siberian Craton based on the results of geological, petrological, and geochronological studies of Precambrian complexes of the Yenisei Ridge and comprehensive geophysical data. Mineralogical and petrological evidence of paleosubduction is presented, represented by relicts

Abstract A review of the materials obtained over the past decade on the geology and tectonics of the North Urals and its continuation in the basement of the West-Siberian Plate allows us to clarify and supplement characteristics of the geological features of the region, and substantiate our new conclusions. We suggested more precise vertical division of complexes developed in the region into structural

Abstract— The relationship between cyclic processes in the core and lithosphere in the Middle Jurassic–Paleogene (167–22 Ma) was investigated. The dynamics of cyclic processes was associated with paleointensity behavior and sea level. It is shown that variations in paleointensity and ocean level are two broadband oscillatory processes. The characteristic times of variations in geomagnetic and eustatic

Abstract Metasomatites of the White Sea mobile belt of the Fennoscandian (Baltic) shield are considered. Metasomatites are traced from southeast to northwest for a distance of ≥550 km. In mineral composition, metasomatites correspond to the paragenesis of amphibolite facies of regional high-pressure metamorphism. To determine the tectonic position of metasomatites and their place in the sequence of

Abstract The geological and geophysical study of the representative segment of the Alpine-Himalayan mobile belt—the Central zone of the Garhwal Himalaya—was conducted. The results of structural and geological studies in conjunction with the data on the deep structure obtained by geophysical methods, compared the speed of horizontal movements and the position of the hypocenters of seismic events, are

Abstract The complexity of seismogenesis calls for probabilistic rather than deterministic model. Towards that direction, the stress release models transpose the elastic rebound theory in a stochastic framework, where the stress level in a region increases gradually between earthquakes due to constant tectonic loading and is released suddenly when an event occurs. The data are modeled through point

Abstract In present study soil radon (Rn-222) emanation, geomagnetic total field intensity (Btotal), and total electron content (TEC) in ionosphere prior to Mw 5.5, Kokrajhar, Assam earthquake of September 12, 2018 were investigated using multiparametric geophysical observations at Ouguri Hills, Tezpur, Assam. Prominent anomalies were observed in the soil Rn-222 emanation, Btotal and TEC time series

Abstract Geometry and kinematics of deformation across the Nehbandan Fault System (NFS) have been studied in the Bibimaryam and Damdameh areas in the Sistan Suture zone (SSZ). Nearly vertical fault planes with sub-horizontal lineations and correlation of these faults analysis with anisotropy of magnetic susceptibility (AMS) indicates a predominantly transpressive regime including right-lateral strike-slip

Abstract The Red River delta with an area of about 12 620 km2 is one of the largest deltas of Viet Nam and it also is one of the remarkable deltas of Asia. The delta was formed during the Holocene, mainly from 9000 years ago to the present. The Red River delta belongs to the NW tip of the large tertiary basin that is the Red River basin (Song Hong basin). The NW tip of the Red River basin presents

Abstract— The general tectonic features of the Baltic-Mezen zone developed along the border of the Fennoscandian shield and the Russian Plate in the north of the East European platform, are considered. The geophysical remote methods and structural analysis were used. It has been established that the zone has a length of more than 1000 km with a width of 10–40 km and can be traced from the Gulf of Finland

Abstract— The present study deals with the Jabal Tays ophiolite area, which was affected by Al Amar-Idsas fault. It is one of the most important tectonic features in the Eastern Arabian Shield. This study aims to accomplish through field investigation, finite strain and microstructural analysis for understanding the nature of tectonic evolution and the deformation in the Jabal Tays area. Field and

Abstract The article considers the history of seafloor spreading of the Eurasian Basin. The sharp decline in the spreading rate in the Eocene about 46 Ma was revealed, which is recorded in the distribution of linear magnetic anomalies. This jump in velocity is explained by a geodynamic model, but not by the northward movement of Greenland. The geodynamic processes of the Pacific subduction zone generate

Abstract The new data on the tectonic setting and conditions for the Middle‒Late Cambrian deposits formation in the southern part of the North Kara terrane, presented in our research, the data induced from the studies of clastic rocks in the metaterrigenous basement complexes of Troynoy Island (Izvestia CEC archipelago) and the northern part of Bolshevik Island (Severnaya Zemlya archipelago). The sandstones

Abstract The seismic stratigraphy scheme for the shelf basins of the East Siberian Sea and the Chukchi Sea region and the adjacent deepwater area of the Amerasia basin has been developed, and mega-sequences (or tectonostratigraphic units) with the conventional ages of 125‒100, 100‒80, 80‒66, 66‒56, 46‒45, 45‒34, 34‒20, 20‒0 Ma are distinguished. Zhokhov foredeep basin of the Late Jurassic‒Neocomian

Abstract This paper considers the crustal structure, seismic stratigraphy, thermal evolution, and lithospheric stretching of the deep-water basin located on the East Antarctic passive margin in the Princess Elizabeth Trough. Seven of Middle Jurassic to Quaternary seismic sequences were identified based on interpretation of multichannel seismic data. The information about seismic stratigraphy and crustal

Abstract— Detailed lithological, stratigraphic, and structural studies of the fold-thrust structures were conducted on New Siberia Island. We have established that the jointly deformed complexes of the Upper Cretaceous–Middle Neopleistocene are overlapped by undeformed sediments of the Upper Neopleistocene. This fact confirms the completion of the deformation process at the end of the Middle Neopleistocene

Abstract The Gulf of Aqaba is situated along the southern part of the Dead Sea Rift Area transform (DST), 1000 km (620 miles), the boundary between the African plate and the Arabian plate. It is situated toward the east of the Sinai landmass and west of Saudi Arabia. It is one of the joints interfacing the Asian and African landmasses. The Gulf expands 180 km from Eilat and Aqaba and joins the Red

Abstract The Kazerun fault system as an active transverse fault has affected the structures and sedimentation of the Zagros belt from Cambrian to the present. On the basis of published geological maps this fault system has divided into four segments: the Sisakht, Yasuj, Kamarij and Borazjan segments. The fault slip data in the seven sites close the Kamarij segment within this fault system; we have

Abstract The Urf Al-Mahib area, located to the southern part of the Eastern Desert (SED) of Egypt, is covered mainly by juvenile Neoproterozoic crust and Nubian sandstones. Field investigation and structural analyses give evidence that the area of Urf Al-Mahib developed through four successive phases of deformation (D1, D2, D3 and D4). D1 was an attenuated phase represented by tight to isoclinal folds

Abstract— The age and geodynamic position of the volcanic source of the Upper Jurassic–Lower Cretaceous deposits of Western Chukotka were determined. Products of synchronous volcanism were revealed by detailed lithological studies. Following sedimentological analysis results we established an admixture of pyroclastic material in the Oxfordian‒Kimmeridgian deposits of the Chukchi microcontinent, indicating

Abstract— The Lower Oligocene Kal-e-kafi (East of Anarak, Central Iran) lamprophyres occur as stocks and dikes, which cross-cut the Eocene volcanic and Cretaceous sedimentary rocks. The predominant minerals of these lamprophyres are hornblende (magnesiohastingsite) and clinopyroxene (diopside) phenocrysts set in a fine- to medium-grained matrix of the same minerals plus plagioclase (labradorite to

Abstract— In the period from 2007 to 2017 complex geological and geophysical studies were carried out in the three largest flexural-rupture fault zones in the North-West Caucasus (Anapa, Akhtyrka, and Moldavansky). The microseismic sounding (MSM) was used as the main geophysical method. Studies with the help of MSM allowed us to identify the features of the deep structure of the earth's crust in the

Abstract— The U–Pb dating and Hf isotope systematics of detrital zircons from a sandstone interbed in the section of the upper conglomerate sequence of the Mt. Southern Demerdzhi were carried out. The dominant populations of detrital zircons in the studied sample characterize episodes of magmatic activity within the source of the Upper Jurassic conglomerates. Magmatism was manifested in the Vendian-Cambrian

Abstract Being a part of the eastern Mediterranean, northern Lebanon and northwestern Syria is a seismotectonically active region due to the juxtaposition of several plate boundaries, the existence of many active faults, and the intense seismicity generated along rifting, transform, and convergent plate boundaries. We applied a tomographic inversion on seismic body wave arrivals recorded at 12 seismic

Abstract Studies in paleomagnetism, structural geology, and paleontology (mammals, mollusks, palynology) in the coastal sections of the Taman Peninsula north-western part (2017–18) resulted in definition of three sedimentary sequences. The sandy and clayey lower sequence (I) formed at 2.1–1.7 Ma. It contains a normally magnetised zone within deposits of reversed polarity correlated to the Olduvai Subchron

Abstract The paper presents seismogeodynamic analysis of modern structures located in the Lena river delta. These structures are key elements in the tectonic evolution of the shelf–continent transition zone in the Arctic segment of the boundary between the Eurasian and North American lithospheric plates. The geological structure of the Lena river delta is predetermined by the junction of the ancient

Abstract In this research the Coulomb stress changes due to earthquake sequence that began in the 1936 to 1997 earthquakes in Eastern Iran and their triggering effect on the rupturing of adjacent faults were investigated. Obtained results revealed a well triggering relation between main shocks and later events on the Dasht-e-Bayaz and Abiz faults, respectively. The calculated stress maps indicate that

Abstract—The Late Mesozoic volcanic province of East Asia is considered in relation to global geological events. The main structure-forming events and largest magmatic productivity of the province coincided with the peak of widely manifested plume activity in the Early Cretaceous. A geodynamic model of magmatic province formation of is proposed, relating the development of the province to the complex

Abstract— The structure and evolution of the eastern part of the Southwest Indian Ridge are discussed. Based on geological-geophysical data and cartographic materials, analysis of spatial and temporal changes of ridge morphostructure was performed. Analysis of the data made it possible to recognize the stages of the ridge evolution and delineate its sections differing in tectonics, structure, and morphostructural

Abstract Based on geological and geophysical data for the conjugate Africa–East Antarctica margins, the peculiarities of preparation of the breakup of central Gondwana are discussed. When using the historical approach, a significant inheritance of the Middle-Upper Jurassic tectono-magmatic development from the preceding time is shown. The first location of tectono-magmatic activity in zones of weakness