scholarly journals Late Cenozoic partitioning of oblique plate convergence in the Zagros fold-and-thrust belt (Iran)

Tectonics ◽  
2006 ◽  
Vol 25 (3) ◽  
pp. n/a-n/a ◽  
Author(s):  
Christine Authemayou ◽  
Dominique Chardon ◽  
Olivier Bellier ◽  
Zaman Malekzadeh ◽  
Esmaeil Shabanian ◽  
...  
Keyword(s):  
Thrust Belt ◽  
Late Cenozoic ◽  
Plate Convergence ◽  
Fold And Thrust Belt

Timing and origin of deformation along the Patagonian fold and thrust belt

2000 ◽  
Vol 137 (4) ◽  
pp. 345-353 ◽  
Author(s):  
M. SUÁREZ ◽  
R. DE LA CRUZ ◽  
C. M. BELL
Keyword(s):  
Continental Margin ◽  
Foreland Basin ◽  
South American ◽  
Thrust Belt ◽  
The South ◽  
Plate Convergence ◽  
Ridge Subduction ◽  
Fold And Thrust Belt ◽  
Chile Ridge ◽  
Oceanic Plates

The Andean orogeny in the Patagonian Cordillera of southern South America reflects the consequences of the Mesozoic and Cenozoic subduction of an oceanic plate beneath the South American continental margin. The geological evolution of the region has been influenced by the Eocene collision and subduction of the Farallon–Aluk Ridge and the Miocene–Recent subduction of the Chile Ridge. Another aspect of plate interaction during this period was two intervals of rapid plate convergence, one at 50–42 Ma, and the other at 25–10 Ma, between the South American and the oceanic plates. It has been proposed that the collision of the Chile Ridge with the trench was responsible for the development, at least in part, of the Patagonian fold and thrust belt. This belt extends for more than 1000 km along the eastern foothills of the southern Andes between 46° and 54° S along the southwestern rim of the Austral Basin. The interpretation of a link between subduction of the ridge and formation of the fold and thrust belt is based on assumed time coincidences between contractional tectonism and the collision of ridge segments during Middle and Late Miocene times. The main Tertiary contractional events in the Patagonian fold and thrust belt took place during latest Cretaceous–Palaeocene–Eocene and during Miocene times. Although the timing of deformation is still poorly constrained, the evidence currently available suggests that there is little or no relationship between the timing of the fold and thrust belt and the collision of ridge segments. Most if not all of the contractional tectonism pre-dated the latest episodes of ridge collision. Collision of a ridge crest with the continental margin has been active for the past 14 to 15 million years. Contrary to the suggestion of a relationship between ridge subduction and compression, the main result of this collision has been fast uplift and extensional tectonism. The initiation of the Patagonian fold and thrust belt in latest Cretaceous or early Tertiary times coincided with a fundamental change in the tectonic evolution of the Austral Basin. Throughout the Cretaceous most of this basin subsided as a broad backarc continental shelf. Only in latest Cretaceous times, and coinciding with the initiation of the fold and thrust belt, the basin underwent a transition to a retro-arc foreland basin. This change to an asymmetrically subsiding foreland basin, with an associated foreland fold and thrust belt, was related to uplift of the Andean orogenic belt in the west.

scholarly journals Late Jurassic Structural Deformation and Late Cenozoic Reactivation of the Southern Junggar Fold-And-Thrust Belt, NW China

2021 ◽  
Vol 9 ◽  
Author(s):  
Delong Ma ◽  
Jianying Yuan ◽  
Yanpeng Sun ◽  
Hongbin Wang ◽  
Dengfa He ◽  
...  
Keyword(s):  
Late Jurassic ◽  
Structural Evolution ◽  
Structural Deformation ◽  
Thrust Belt ◽  
Late Cenozoic ◽  
Seismic Profiles ◽  
The North ◽  
Fold And Thrust Belt ◽  
Deformation Features ◽  
Kinematic Analyses

Because of the influence of the far field effect of the collision between Euro-Asian and India plates during the Late Cenozoic, the Tian Shan orogenic belt underwent intense reactivation, forming the Southern Junggar fold-and-thrust belt (SJ-FTB) to the north and the Kuqa fold-and-thrust belt to the south. Most previous research focuses on the deformation features and mechanisms during the Late Cenozoic. However, little research has been done on deformation features and mechanisms during the Late Jurassic. In this paper, we conducted geometric and kinematic analyses of seismic profiles and outcrop data to reveal the Late Jurassic deformation characteristics in SJ-FTB. Furthermore, we carried out sandbox modeling experiments to reproduce the regional structural evolution since the Early Jurassic. Angular unconformity between the Cretaceous and Jurassic is well preserved in the Qigu anticline belt. This unconformity also exists in the Huoerguosi–Manasi–Tugulu (HMT) anticline belt, which is the second fold belt of the SJ-FTB, indicating that the HMT anticline belt started to become active during the Late Jurassic. The Qigu anticline belt reactivated intensively during the Late Cenozoic, and the displacement was transferred to the HMT anticline belt along the Paleogene Anjihaihe Formation mudstone detachment. Therefore, the present-day SJ-FTB forms because of the two-stage compressional deformation from both the Late Jurassic and Late Cenozoic (ca. 24 Ma).

Late Cenozoic Clockwise Rotations in the Westernmost Part of the Arcuate Qiulitage Fold‐and‐Thrust Belt of Southern Tian Shan Foreland and Its Tectonic Implications

Tectonics ◽  
2019 ◽  
Vol 38 (6) ◽  
pp. 2036-2058 ◽  
Author(s):  
Zhiliang Zhang ◽  
Jimin Sun ◽  
Lixing Lü ◽  
Shengchen Tian ◽  
Mengmeng Cao ◽  
...  
Keyword(s):  
Thrust Belt ◽  
Late Cenozoic ◽  
Tectonic Implications ◽  
Fold And Thrust Belt ◽  
Tian Shan

scholarly journals Structure and tectonic evolution of the NE segment of the Polish-Ukrainian Carpathians during the Late Cenozoic: subsurface cross-sections and palinspastic models

2016 ◽  
Vol 67 (4) ◽  
pp. 347-370 ◽  
Author(s):  
Jan Kuśmierek ◽  
Urszula Baran
Keyword(s):  
Cross Sections ◽  
Tectonic Evolution ◽  
Geological Structure ◽  
Thrust Belt ◽  
Late Cenozoic ◽  
Structural Classification ◽  
Fold And Thrust Belt ◽  
Platform Margin ◽  
Carpathian Foredeep ◽  
The Impact

Abstract The discrepant arrangement of the Carpathian nappes and syntectonic deposits of the Carpathian Foredeep reveals the oroclinal migration of the subduction direction of the platform margin during the Late Cenozoic. Formation of the nappes was induced by their detachment from disintegrated segments of the European Platform; the segments were shortened as a result of their vertical rotation in zones of compressional sutures. It finds expression in local occurrence of the backward vergence of folding against the generally forward vergence toward the Carpathian Foredeep. The precompressional configuration of sedimentation areas of particular nappes was reconstructed with application of the palinspastic method, on the basis of the hitherto undervalued model which emphasizes the influence of the subduction and differentiated morphology of the platform basement on the tectonic evolution of the fold and thrust belt. Superposition of the palaeogeographic representations and the present geometry of the orogen allows understanding of the impact of the magnitudes of tectonic displacements on the differentiation of the geological structure in the NE segment of the Carpathians. The differentiation has inspired different views of Polish and Ukrainian geologists on structural classification and evolution of the frontal thrusts.

Reconciling plate convergence and orogeny: The influence of India-Asia convergence rate on the formation of the Himalayas

2020 ◽  
Author(s):  
Ben S. Knight ◽  
Fabio A. Capitanio ◽  
Roberto F. Weinberg
Keyword(s):  
Tibetan Plateau ◽  
Numerical Models ◽  
The Tibetan Plateau ◽  
Thrust Belt ◽  
Plate Convergence ◽  
Structural Style ◽  
Fold And Thrust Belt ◽  
Velocity History ◽  
The Himalaya

<p>The collision of India and Eurasia since ~50 Ma has resulted in a broad range of deformation along the Himalaya-Tibetan orogeny, accommodating >2700 km of convergence. The region is characterised by the Tibetan Plateau, the Himalayan internal units and fold-and-thrust belt from North to South. These formed as a consequence of a convergence history characterised by a progressive decrease in velocity, from ~10 cm/yr 50 Ma, to ~8 cm/yr 42.5 Ma and to present-day values of ~4 cm/yr around 20 Ma. Here, we test the controls of such a convergence velocity history on the orogeny of a viscoplastic wedge during collision, above a subducting continental lithosphere. We compare numerical models simulating India-Asia plate convergence and collision, comparing the structures observed throughout the evolution with those observed in the Himalayan-Tibetan region. The models display distinct phases of growth and structural style evolution in the Himalayan-Tibetan region that are a result of the change in convergence velocity and long-term collision. After an initial stacking, the high convergence velocity forces deformation migration towards the upper plate, where a plateau forms, while late stage slowdown of collision favours the formation of the Himalayan fold-and-thrust belt. While the latter is in agreement with the structuring of the southermost domains and the South Tibetan Detachment (STD) fault, the former provide constraints to the initial uplift of the Tibetan Plateau.</p>

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