Active tectonics, tectonic geomorphology, and fault system dynamics: How geoinformatics can help

2006 ◽  
Author(s):  
J Ramón Arrowsmith
Keyword(s):  
System Dynamics ◽  
Active Tectonics ◽  
Fault System ◽  
Tectonic Geomorphology

First tectonic-geomorphology study along the Longmu–Gozha Co fault system, Western Tibet

2017 ◽  
Vol 41 ◽  
pp. 411-424 ◽  
Author(s):  
Marie-Luce Chevalier ◽  
Jiawei Pan ◽  
Haibing Li ◽  
Zhiming Sun ◽  
Dongliang Liu ◽  
...  
Keyword(s):  
Fault System ◽  
Tectonic Geomorphology

scholarly journals TECTONIC GEOMORPHOLOGY OF ESCARPMENTS: THE CASES OF KOMPOTADES AND ΝΕΑ ANCHIALOS FAULTS

2004 ◽  
Vol 36 (4) ◽  
pp. 1716 ◽  
Author(s):  
E. Zovoili ◽  
E. Konstantinidi ◽  
I. K. Koukouvelas
Keyword(s):  
Active Tectonics ◽  
Tectonic Activity ◽  
Tectonic Geomorphology ◽  
Stream Length ◽  
Sinuosity Index ◽  
Geomorphic Indices ◽  
Tectonic Processes ◽  
Uplift Rates ◽  
Mountain Front ◽  
Active Processes

Most active processes on the surface imply that tectonics and geomorphology converge in a way that landscape change may be used as a tectonic signal, given that erosion and weathering have been taken into account. We selected two faults, the Kompotades and the Nea Anchialos faults in the Sperchios and South Thessaly rift zones respectively, and we performed a morphometric analysis. This analysis comprises geomorphic indices that have been used successfully in studies of active tectonics, as the mountain front sinuosity index (Smf), stream gradient index (SL) and valley floor width to valley height ratio (Vf). At both studied mountain fronts, the Vf index ranged between 0,4 to 1,2, implying high uplift rates, while the Smf «1 index revealed relatively high tectonic activity, which decreases towards the west. On the other hand, the SL index though more sensitive to non-tectonic processes, (i.e. the rock resistance, stream length) is less indicative of tectonic activity. Based on the distribution of the geomorphic indices a two-fault strand model is suggested forming the mountain front in the two examples with the range-ward fault strand to be more appropriate for Kompotades fault and the basinward fault strand for Nea Anchialos fault.

scholarly journals BARGEN continuous GPS data across the eastern Basin and Range province, and implications for fault system dynamics

2004 ◽  
Vol 159 (3) ◽  
pp. 842-862 ◽  
Author(s):  
Nathan A. Niemi ◽  
Brian P. Wernicke ◽  
Anke M. Friedrich ◽  
Mark Simons ◽  
Richard A. Bennett ◽  
...  
Keyword(s):  
System Dynamics ◽  
Basin And Range ◽  
Fault System ◽  
Gps Data ◽  
Basin And Range Province ◽  
Eastern Basin ◽  
Continuous Gps

Tectonic-geomorphology of the Litang fault system, SE Tibetan Plateau, and implication for regional seismic hazard

2016 ◽  
Vol 682 ◽  
pp. 278-292 ◽  
Author(s):  
Marie-Luce Chevalier ◽  
Philippe Hervé Leloup ◽  
Anne Replumaz ◽  
Jiawei Pan ◽  
Dongliang Liu ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Seismic Hazard ◽  
Fault System ◽  
Tectonic Geomorphology

Active tectonics and morphostructure at the northern margin of central Bransfield Basin, Hurd Peninsula, Livingston Island (South Shetland Islands)

1999 ◽  
Vol 11 (3) ◽  
pp. 323-331 ◽  
Author(s):  
J.M. González-Casado ◽  
J. López-Martínez ◽  
J.J. Durán
Keyword(s):  
Active Tectonics ◽  
Fault System ◽  
South Shetland Islands ◽  
Northern Margin ◽  
Bathymetric Data ◽  
Livingston Island ◽  
Bed Thickness ◽  
Bransfield Basin ◽  
Extension Direction ◽  
Geomorphological Analysis

Geophysical, structural, geomorphological, topographical and bathymetric data from the Hurd Peninsula area, Livingston Island, South Shetland archipelago, suggest that an extensional fault system, orientated NW–SE, together with a conjugate group of NE–SW normal oblique-slip faults, control the landforms in this area. These structures separate fault-bounded blocks of different heights, giving rise to a horstgraben structure. The depressed blocks were filled by glaciers and flooded in part by the sea. The recent movement of these faults can be established from the calculated isopachs of a small Quaternary sedimentary basin, related to this extensional fault system, which shows that sedimentary bed thickness is controlled mainly by the NE–SW fault system. Geomorphological analysis also shows that the NW–SE faults control the main morphostructures of this region. The character of the recent stress tensor has been established from fault-slip data, taking into account only those faults that are related to morphostructures. The calculated palaeostress tensor is extensional, with a N46°E main extension direction, and an average stress ratio of 0.17.

scholarly journals Crustal deformation, active tectonics and seismic potential in the Sicily Channel (Central Mediterranean), along the Nubia–Eurasia plate boundary

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Mimmo Palano ◽  
Andrea Ursino ◽  
Salvatore Spampinato ◽  
Federica Sparacino ◽  
Alina Polonia ◽  
...  
Keyword(s):  
Shear Zone ◽  
Crustal Deformation ◽  
Thermal State ◽  
Plate Boundary ◽  
Active Tectonics ◽  
High Heat ◽  
Observation Point ◽  
Fault System ◽  
Central Mediterranean ◽  
Sicily Channel

AbstractBased on multidisciplinary data, including seismological and geodetic observations, as well as seismic reflection profiles and gravity maps, we analysed the pattern of crustal deformation and active tectonics in the Sicily Channel, a key observation point to unravel the complex interaction between two major plates, Nubia and Eurasia, in the Mediterranean Sea. Our data highlight the presence of an active ~ 220-km-long complex lithospheric fault system (here named the Lampedusa-Sciacca Shear Zone), approximately oriented N–S, crossing the study area with left-lateral strike-slip deformations, active volcanism and high heat flow. We suggest that this shear zone represents the most active tectonic domain in the area, while the NW–SE elongated rifting pattern, considered the first order tectonic feature, appears currently inactive and sealed by undeformed recent (Lower Pleistocene?) deposits. Estimates of seismological and geodetic moment-rates, 6.58 × 1015 Nm/year and 7.24 × 1017 Nm/year, respectively, suggests that seismicity accounts only for ~ 0.9% of crustal deformation, while the anomalous thermal state and the low thickness of the crust would significantly inhibit frictional sliding in favour of creeping and aseismic deformation. We therefore conclude that a significant amount of the estimated crustal deformation-rate occurs aseismically, opening new scenarios for seismic risk assessments in the region.

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