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Frontiers | Early Quaternary Tectonic Transformation of the Helan Shan: Constraints Due To Quantitative Geomorphology

The Helan Shan is located on the front edge of the expanding Tibetan Plateau. However, how the topography here responds to this propagation and its precise time constraints remains unknown. Based on the response process of fluvial landforms and tectonic evolution, we conducted a quantitative landform analysis of the Helan Shan region. Here, the spatial distribution features of various geomorphic indices were coupled, demonstrating that the mountain is tilting toward the west and north. The steeper downstream and gentle upper reaches indicate that the fluvial landforms have experienced an accelerated incision event, which can be attributed to the tectonic activity along the East Helan Shan Fault. Furthermore, the response time of the tectonic knickpoints ranges from 0.1¬–1.4 Ma based on the paleochannel reconstruction method. Combined with previous studies on low temperature thermochronology and active tectonics, we propose a tectonic transformation model where the Helan Shan shi

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Frontiers | Mid-Miocene to Present Upper-Plate Deformation of the Southern Cascadia Forearc: Effects of the Superposition of Subduction and Transform Tectonics

The southern Cascadia forearc undergoes a three-stage tectonic evolution, each stage involving different combinations of tectonic drivers, that produce differences in the upper-plate deformation style. These drivers include subduction, the northward migration of the Mendocino triple junction (MTJ) and associated thickening and thinning related to the Mendocino Crustal Conveyor (MCC) effect, and the NNW translation of the Sierra Nevada-Great Valley (SNGV) block. We combine geodetic data, plate reconstructions, seismic tomography and topographic observations to determine how the southern Cascadia upper plate is deforming in response to the combined effects of subduction and NNW-directed (MCC- and SNGV-related) tectonic processes. The location of the terrane boundaries between the relatively weak Franciscan complex and the stronger KMP and SNGV block has been a key control on the style of upper-plate deformation in the southern Cascadia forearc since the mid-Miocene. At ~15 Ma, present-da

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Frontiers | Normal Faulting Along the Kythira-Antikythira Strait, Southwest Hellenic Forearc, Greece

Upper-plate normal faults along forearcs often accumulate slip during > Mw 6 earthquakes. Such normal faults traverse the forearc of the Hellenic Subduction System (HSS) in Greece and are the focus of this study. Here, we use detailed field-mapping and analysis of high-resolution Digital Elevation Models (DEMs) to study 42 active normal faults on the islands of Kythira and Antikythira in the Aegean Sea. Onshore fault kinematic data are complemented by seabed bathymetry mapping of ten offshore faults that extend along the Kythira-Antikythira Strait (KAS). We find that normal faults in the KAS have lengths of ~1-58 km and scarps ranging in height from 1.5 m to 2.8 km, accommodating, during the Quaternary, trench-orthogonal (NE-SW) extension of ~2.46 ± 1.53 mm/a. Twenty-eight of these faults have ruptured since the Last Glacial Maximum, with their postglacial (16±2 ka) displacement rates (0.19-1.25 mm/a) exceeding their Quaternary (≤ 0.7-3 Ma) rates (0.03-0.37 mm/a) by more

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TÜBİTAK manages an earthquake related process

TÜBİTAK manages an earthquake related process
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Hasan mandalEarthquake research special callTurkish journal of earth sciencesInternational active tectonicsField of earthquake researchEarthquake researchResearch special callActive tectonicsTurkish journalEarth sciences

Frontiers | Paleoseismological Findings at a New Trench Indicate the 1714 M8 1 Earthquake Ruptured the Main Frontal Thrust Over all the Bhutan Himalaya

Frontiers | Paleoseismological Findings at a New Trench Indicate the 1714 M8 1 Earthquake Ruptured the Main Frontal Thrust Over all the Bhutan Himalaya
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