Journal of Asian Earth Sciences
Papers 4836
1 page of 484 pages (4,836 results)
#1Rui Liu (CEA: China Earthquake Administration)
#2An Li (CEA: China Earthquake Administration)H-Index: 3
Last.Zhidan Chen (MSU: Moscow State University)
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Abstract The eastern end of the Altyn Tagh fault connects the western Qilian Shan thrust belt and its foreland basin, the Hexi Corridor, which contains numerous active faults with various strikes and kinematics. Although understanding of the geometry and kinematics of these active faults is increasing, the deformation pattern since the late Quaternary in the western end of the Hexi Corridor remains controversial. Studying the geometry and kinematics of these faults provides great benefit for und...
Abstract This work contributes to depict the current seismicity, fault kinematics, and state of stress in the Greater Caucasus (territories of Georgia, Azerbaijan and Russia). We merged and homogenized data from different earthquake catalogues, relocated ~1000 seismic events, created a database of 366 selected focal mechanism solutions, 239 of which are new, and performed a formal stress inversion. Preferential alignments of crustal earthquake foci indicate that most seismic areas are located al...
Abstract Geological modeling by geophysical data in the Makran subduction zone is a challenging task which comes from its extreme structural and geological complexity. Different geological models were presented for this zone in previous studies by the use of various sources of information. Among these studies, numerous geophysical models were introduced to illustrate depth, geometry and location of the subduction zone and definition boundaries with adjacent zones. However, structural complexity ...
Abstract We determine a new model of S-wave velocity (Vs) tomography beneath Mainland China and surrounding areas by inverting 321,666 S-wave arrival times from 15,618 events recorded by the China Seismic Network (CSN) and at stations in East Asia compiled by the International Seismological Center (ISC). The obtained 3-D Vs model has a generally good resolution down to the uppermost lower mantle, which provides important constraints on the deep structure and origin of intraplate volcanoes in Mai...
Abstract We present new whole-rock geochemical data for volcanic rocks dredged from active submarine volcanoes TA15, TA16, and TA19 that mark the southern part of the Tonga Arc near Ata island. The lava samples show a wide range of compositions from basalt to dacite within the low-K tholeiitic series, and geochemical data indicate fractional crystallization of olivine, orthopyroxene, clinopyroxene, and plagioclase. The origin of magmas in the southern Tonga Arc can be explained by the mixing of ...
#1Shangchang Duan (PKU: Peking University)
#2Guiting Hou (PKU: Peking University)H-Index: 9
Last.Lihui Yang (PKU: Peking University)
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Abstract The Broad Triangle Area (BTA) is a significant active seismic zone located mainly in East Asia. The Pamir-Baikal tectonic belt, North-South tectonic belt and Himalayan tectonic belt compose the three boundaries of the BTA. Previous studies suggested that the geodynamics of the BTA may be related to coupling between the Indian and Eurasian plates, yet quantitative analysis is lacking. In this study, we use the elastic finite element method in the ANSYS software to establish a spherical s...
#1Mohamed Rashed (Suez Canal University)H-Index: 8
#2Hani ZahranH-Index: 3
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Abstract The 2009 earthquake swarm that occurred in Al-Ays area, Saudi Arabia was believed to be of magmatic origin and was caused by magma rising underneath the area and installment of a subsurface dyke that reached up to 3.5 km below the ground surface. This study uses the results of an integrated geophysical survey conducted across the major surface rupture, which appeared in the area after the earthquake swarm, along with other evidence, to suggest a different scenario. Contradicting focal m...
Abstract It is thought that the continental crust that ultimately became Japan (i.e., proto-Japan) formed during the early Cambrian near the margin of the South China block following its separation from the Australian block. However, the onset of timing of subduction and details of the magmatic evolution of the region are poorly understood, due mainly to the sporadic occurrence of Cambrian rocks. A high-temperature metamorphic complex is distributed throughout eastern Kyushu island, Japan. At th...
Abstract The dissolution of magnetic oxides is an important process in many lake environments. Understanding this phenomenon is crucial for the paleoenvironmental interpretation of the magnetic properties of lake sediments. In order to reveal its effects on sedimentary magnetic properties, and to assess the possible associated paleoenvironmental implications, we carried out detailed rock magnetic analyses of the selected samples from a 920-kyr lacustrine sequence from the Heqing Basin, SW China....
#1Taylan SançarH-Index: 3
#2Cengiz Zabcı (ITU: Istanbul Technical University)H-Index: 7
Last.Christof Vockenhuber (ETH Zurich)H-Index: 20
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Abstract Controversy remains over when present-day configuration of the Anatolia boundary faults came into existence, and the issue of what are the driving forces of the Anatolian westward motion. The NW-striking dextral and NE-striking sinistral second-order strike-slip faults at the eastern part of the Anatolian Scholle play a crucial role within these long-lasting discussions, and the NE-striking sinistral Malatya–Ovacik Fault Zone (MOFZ) is particularly important in this ongoing debate. Alth...
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