Tectonic geomorphology of the Aras drainage basin (NW Iran): Implications for the recent activity of the Aras fault zone

2019 ◽  
Vol 55 (7) ◽  
pp. 5022-5048 ◽  
Author(s):  
Reza Saber ◽  
Veysel Isik ◽  
Ayse Caglayan
Keyword(s):  
Fault Zone ◽  
Drainage Basin ◽  
Tectonic Geomorphology ◽  
Nw Iran ◽  
Recent Activity

scholarly journals Measurements of tectonic micro-displacements within the Idrija fault zone in the Učja valley (W Slovenia)

2020 ◽  
Vol 60 (1) ◽  
Author(s):  
Andrej Gosar
Keyword(s):  
Fault Zone ◽  
Active Fault ◽  
Average Rate ◽  
Active Faults ◽  
Slip Rate ◽  
Seismic Hazard Assessment ◽  
Vertical Displacements ◽  
Recent Activity ◽  
Insight Into ◽  
Horizontal Displacements

A recent slip-rate of an active fault is a very important seismotectonic parameter, but not easy to determine. Idrija fault, 120 km long, is a prominent geomorphologic feature with large seismogenic potential, still needed to be researched. Measurements of tectonic micro-displacements can provide insight into its recent activity. The Učja valley extends transversally to the Idrija fault and was therefore selected for the installation of TM 71 extensometer. Measurements on the crack within its inner fault zone are conducted from the year 2004. In 14 years of observations a systematic horizontal displacements with average rate of 0.21 mm/year and subordinate vertical displacements of 0.06 mm/year were established, proving the activity of this fault. An overview of methods of displacement measurements related to active faults and of newer interdisciplinary investigations of the Idrija fault is given. Displacement rates are beside for geodynamic interpretations important for improvement of seismotectonic models and thus for better seismic hazard assessment.

scholarly journals Detailed tectonic geomorphology of the Dras fault zone, NW Himalaya

2021 ◽  
Vol 7 (3) ◽  
pp. 390-414
Author(s):  
AA Shah ◽  
◽  
A Rajasekharan ◽  
N Batmanathan ◽  
Zainul Farhan ◽  
...  
Keyword(s):  
Fault Zone ◽  
Normal Fault ◽  
Strike Slip ◽  
Tectonic Geomorphology ◽  
Earthquake Hazards ◽  
Active Faulting ◽  
Nw Himalaya ◽  
Border Regions ◽  
Major Fault ◽  
Fault Scarps

<abstract> <p>Our recent mapping of the Dras fault zone in the NW Himalaya has answered one of the most anticipated searches in recent times where strike-slip faulting was expected from the geodetic studies. Therefore, the discovery of the fault is a leap towards the understanding of the causes of active faulting in the region, and how the plate tectonic convergence between India and Eurasia is compensated in the interior portions of the Himalayan collision zone, and what does that imply about the overall convergence budget and the associated earthquake hazards. The present work is an extended version of our previous studies on the mapping of the Dras fault zone, and we show details that were either not available or briefly touched. We have used the 30 m shuttle radar topography to map the tectonic geomorphological features that includes the fault scarps, deflected drainage, triangular facets, ridge crests, faulted Quaternary landforms and so on. The results show that oblique strike-slip faulting is active in the suture zone, which suggests that the active crustal deformation is actively compensated in the interior portions of the orogen, and it is not just restricted to the frontal portions. The Dras fault is a major fault that we have interpreted either as a south dipping oblique backthrust or an oblique north dipping normal fault. The fieldwork was conducted in Leh, but it did not reveal any evidence for active faulting, and the fieldwork in the Dras region was not possible because of the politically sensitive nature of border regions where fieldwork is always an uphill task.</p> </abstract>

scholarly journals Tectonic geomorphology of the Jhelum fault zone & its contiguous regions in western Himalaya

2021 ◽  
Author(s):  
Afroz Ahmad Shah ◽  
Syaakiirroh Sahari1 ◽  
Navakanesh B. ◽  
Nurhafizah A.M. ◽  
Fu Fui1 ◽  
...  
Keyword(s):  
Fault Zone ◽  
Western Himalaya ◽  
Tectonic Geomorphology

Recent activity of Chihe segment of Tanlu fault zone

2004 ◽  
Vol 17 (6) ◽  
pp. 678-685
Author(s):  
Da-quan Yao ◽  
Jia-can Liu
Keyword(s):  
Fault Zone ◽  
Tanlu Fault Zone ◽  
Tanlu Fault ◽  
Recent Activity

scholarly journals TECTONIC GEOMORPHOLOGY OF THE KARANGSAMBUNG AREA, CENTRAL JAVA, INDONESIA

2021 ◽  
Vol 36 (4) ◽  
pp. 85-105
Author(s):  
Edi Hidayat ◽  
Dicky Muslim ◽  
Zufialdi Zakaria ◽  
Haryadi Permana ◽  
Dimas Aryo Wibowo
Keyword(s):  
Drainage Basin ◽  
Activity Index ◽  
Shape Index ◽  
Tectonic Activity ◽  
Tectonic Geomorphology ◽  
Geological Data ◽  
Eurasian Plate ◽  
Central Java ◽  
Hypsometric Integral ◽  
Geological Conditions

Karangsambung, located in Central Java, Indonesia has complex geological conditions of the tectonic evolution of Java Island due to the subduction process of the India-Australia plate with the Eurasian plate in the Cretaceous-Paleocene. The tectonic movements in the subduction zone have resulted in diverse geological structures and rock types and impact the morphological shape of the study area. The level of tectonic activity in the study area can be determined using a tectonic geomorphological approach. A digital elevation model and geographic information systems are used for geomorphic data processing. Geological data observations were also carried out in the form of river terraces. Seven geomorphic index parameters have been calculated to determine the youngest tectonic activity through the relative tectonic activity index (IAT) of the study area: the ratio of the valley floor width to the valley height, the drainage basin asymmetry, the river gradient-length index, the basin shape index, mountain front sinuosity, drainage density, and the hypsometric integral/hypsometric curve. The IAT score is divided into four classes which are class 1 (0%) very highly, class 2 (13%) highly, class 3 (56%) moderately, and class 4 (31%) low. The IAT shows that the research area is categorized as an active tectonic area so that the morphology formed is more influenced by tectonic activity than erosion. Geological data analysis on uplifted and deformed river terrace outcrops shows that the study area is affected by neotectonic activity.

Structural Evidence of Recent Activity of the Khatanga–Lomonosov Fault Zone in the Laptev Sea

2018 ◽  
Vol 480 (1) ◽  
pp. 671-673 ◽  
Author(s):  
B. V. Baranov ◽  
M. V. Flint ◽  
N. A. Rimskiy-Korsakov ◽  
S. G. Poyarkov ◽  
K. A. Dozorova
Keyword(s):  
Fault Zone ◽  
Laptev Sea ◽  
Recent Activity ◽  
The Laptev Sea
Sign in / Sign up

Export Citation Format

Share Document