Late Cenozoic Tectonic Activity of the Śnieżnik Massif Area (Sudetes, Sw Poland)in the Light of Lidar Dem Morphometric Analysis

2014 ◽  
Vol 48 (1) ◽  
Author(s):  
Artur Sobczyk ◽  
Marek Kasprzak
Keyword(s):  
Tectonic Activity ◽  
Asymmetry Factor ◽  
Late Cenozoic ◽  
The West ◽  
Vertical Movements ◽  
Fault Block ◽  
Hypsometric Integral ◽  
Sw Poland ◽  
Lidar Dem ◽  
Differential Uplift

AbstractŚnieżnik Massif represents a prominent morphological feature in the East Sudetes, which is bounded by a system of faults controlling its differential uplift. Vertical movements originated at least during the Oligocene times, with culmination phase in Pliocene times, whereas estimated total uplift was in the range of 500-1000 meters. This study presents a qualitative (geomorphometric) and quantitative (morphotectonic) approach that combines Late Cenozoic tectonic uplift model with landscape evolution theories. Application of basin asymmetry factor (AF) and hypsometric integral (Hi) analyses allowed recognizing a NW trending tilted fault blocks. They originated as a result of Palaeogene planation surface braking and differential uplift. Uplift and later fault-block tilting in the Śnieżnik Massif morphotectonic unit, were generally realized along NE-SW striking Wilkanow fault to the west and WNW-ESE striking southern fault zone, as expressed here e.g. by Potoczek-Branna, Herˇmranice and Pisary faults.

scholarly journals Morpho-Tectonic Assessment of the Abu-Dabbab Area, Eastern Desert, Egypt: Insights from Remote Sensing and Geospatial Analysis

2021 ◽  
Vol 10 (11) ◽  
pp. 784
Author(s):  
Abdelrahman Khalifa ◽  
Bashar Bashir ◽  
Abdullah Alsalman ◽  
Nazik Öğretmen
Keyword(s):  
Drainage Basin ◽  
Activity Index ◽  
Eastern Desert ◽  
Valley Floor ◽  
Tectonic Activity ◽  
Asymmetry Factor ◽  
Water Drainage ◽  
Stream Length ◽  
Seismic Region ◽  
Hypsometric Integral

The Abu-Dabbab area, located in the central part of the Egyptian Eastern Desert, is an active seismic region where micro-earthquakes (≈ML < 2.0) are recorded regularly. Earthquake epicenters are concentrated along an ENE–WSW trending pattern. In this study, we used morphological indexes, including the valley floor width-to-valley floor height ratio (Vf), mountain front sinuosity (Smf), the asymmetry factor index (Af), the drainage basin shape index (Bs), the stream length–gradient index (SL), hypsometric integral (Hi) water drainage systems, and a digital elevation model analysis, to identify the role of tectonics. These indexes were used to define the relative tectonic activity index (RTAI), which can be utilized to distinguish low (RTAI < 1.26), moderate (RTAI = 1.26–1.73), and high (RTAI > 1.73) tectonic activity signals all over the study area. Firstly, our results indicate low to medium tectonic activity and general anomaly patterns detected along the major tectonic zones of the study area. Secondly, based on most of the low to medium tectonic activity distributed in the study area and the detected anomalies, we discuss two potential drivers of the seismicity in the Abu-Dabbab area, which are fault-controlled and deep-rooted activities.

Patterns of late Cenozoic volcanic and tectonic activity in the West Antarctic rift system revealed by aeromagnetic surveys

Tectonics ◽  
1996 ◽  
Vol 15 (3) ◽  
pp. 660-676 ◽  
Author(s):  
John C. Behrendt ◽  
Richard Saltus ◽  
Detlef Damaske ◽  
Anne McCafferty ◽  
Carol A. Finn ◽  
...  
Keyword(s):  
Tectonic Activity ◽  
Rift System ◽  
Late Cenozoic ◽  
The West ◽  
West Antarctic ◽  
West Antarctic Rift System ◽  
West Antarctic Rift

scholarly journals Earthquake hazard potential along the Panjal Thrust and the Zanskar Thrust, NW Himalaya

2020 ◽  
Author(s):  
Bikram Singh Bali ◽  
Ahsan Afzal Wani
Keyword(s):  
Tectonic Activity ◽  
Asymmetry Factor ◽  
Kashmir Valley ◽  
Nw Himalaya ◽  
Geomorphic Indices ◽  
The North ◽  
Hypsometric Integral ◽  
Moderate Earthquake ◽  
Kashmir Basin ◽  
Extreme North

Abstract Kashmir basin is considered to be tectonically active where damaging earthquakes (historical and instrumental) and landslides have occurred. These geologic catastrophes make Kashmir valley prone to hazards. The fault bound Kashmir basin is marked by two mountain fronts: MF1 associated with the Panjal Thrust (PT) and Balapor Fault (BF) and MF2 associated with the Zanskar Thrust. These two structural units make Kashmir valley very susceptible to earthquakes. With this in view the whole basin was divided into 22 sub-basins. However only nine extreme north and south sub basins (five extreme southern and four northern extreme north) were studied to carry out relative tectonic activity of these two tectonic units. With the help of K-mean clustering of eight basin-related geomorphic indices (Hypsometric integral (Hi), Asymmetry factor (Af), Mountain front sinuosity (Smf), Basin shape (Circularity ratio (KA) and Elongation ratio (Eb)), Form factor (Ff), Bifurcation ratio (Rb) and Sinuosity index (Si) were calculated. The results of the geomorphic indices were correlated with the structural and seismic data after that they were grouped into low three (Class1), moderate (class2) and high (class3) relative tectonic activity zones based on the quantified geomorphic indices, earthquake data, structural data and field observations. The overall results infer the tectonic activity dies out towards the north of the Kashmir Valley. It was observed that the highest tectonic activity mostly corresponds to the sub basins in vicinity of the PT and BF stretching 100 Km from Shopian to Baramulla. The least tectonic activity was found to be associated with the ZT lying to the north and northeast part of the Kashmir Valley. The seismic frequency and the overall data analysis infer that the south and Southwestern side of the Kashmir has potential of moderate earthquake in future.

scholarly journals Morphometric Analysis on Two Contrasting Litho-units of a Southern Part of West Khasi Hills District, Meghalaya, Based on Some Derived Aerial and Relief Parameters: Inferences on Neotectonism

2019 ◽  
pp. 1-13
Author(s):  
Madhurjyojit Chakravartty ◽  
Nishanta Das
Keyword(s):  
Overland Flow ◽  
Drainage Density ◽  
Asymmetry Factor ◽  
The West ◽  
The North ◽  
South Central ◽  
Stream Frequency ◽  
Present Study Area ◽  
Hypsometric Integral ◽  
Longitudinal Profiles

The present study area, occupying a major south-central part of the Jadukata river basin of the West Khasi Hills District of Meghalaya, predominantly comprises two contrasting litho-units viz., the Precambrian gneissic unit (PGU) towards the north of the study area and the Mahadek Formation constituted of sedimentary rocks (MFS) in the south. Derived areal and relief morphometric parameters have been analysed on five sub-basins two of which are in the PGU (Umlang and Umkyrtha) and the other three (Umsophew, Wah-Phodthra, and Khandow) predominantly in the MFS. The drainage density (Dd) and stream frequency (Fs) values are relatively lower for the sub-basins of PGU suggesting higher overland flow. This is substantiated by higher values of the constant of channel maintenance (C) and length of overland flow (Lg). The relief ratio (Rr) and ruggedness number (Rn) are higher for the sub-basins of MFS implying more dissection. High hypsometric integral (HI) and pseudo-hypsometric integral (PHI) suggest youthful stage and neotectonic rejuvenation with a tilt towards the west as indicated by asymmetry factor (AF) and topographic profile. Association of distinct knickpoints of longitudinal profiles with prominent lineaments indicates active fault. Preferred orientation of lower order streams in the PGU sub-basins suggests neotectonism. Deep incision by Umsophew, Wah-Phodthra, and Khandow rivers, forming V-shaped valleys through the MFS is the result of neotectonic uplift which has been further substantiated by very low valley floor-to-height ratio (Vf) at nearby locations of the confluence of these rivers with the Kynshi.

scholarly journals GEODYNAMICS AND SEISMICITY TEREK-CASPIAN BASIN

2014 ◽  
Author(s):  
И.А. Керимов ◽  
М.Я. Гайсумов
Keyword(s):  
Seismic Activity ◽  
Sedimentary Cover ◽  
Geophysical Data ◽  
Tectonic Activity ◽  
Caspian Basin ◽  
Vertical Movements ◽  
Fault Block ◽  
High Degree ◽  
Tectonic Movements ◽  
Geodynamic Activity

Рассмотрены вопросы тектоники, современной геодинамики и сейсмичности Терско-Каспийского прогиба. Характер мощных тектонических движений определил разломно-блоковое строение фундамента и нашел отражение в осадочном чехле. Данные изучения СВДЗП свидетельствуют о высокой степени современных движений сосредоточенных в определенных зонах, отождествляемых с погребенными разломами. По комплексу геолого-геофизических данных выделены разломы различной ориентировки и соответственно различных фаз тектонической активности. Проведен анализ сейсмической активности. В результате обработки и интерпретации большого объема геолого-геофизических материалов выделены участки палео- и современной геодинамической активности. В результате анализа разломно-блоковой тектоники, развития СВЗДП и современной сейсмической активности выделены зоны ВОЗ The questions of tectonics, geodynamics and seismicity modern Terek-Caspian basin was study. Character powerful tectonic movements defined fault-block structure of the crustal surface and is reflected in the sedimentary cover. These recent crustal movements study indicate a high degree of modern vertical movements are concentrated in certain areas, which are identified with buried faults. According to the complex geological and geophysical data allocated the faults of different orientation and correspondingly different phases of tectonic activity. Analysis of seismic activity. As a result, processing and interpretation of a large amount of geological and geophysical data areas of paleo-and modern geodynamic activity. An analysis of the fault-block tectonics, development recent vertical movements and modern seismic activity, zones of possible sources of earthquakes.

scholarly journals Using morphometric and geomorphic indices to assess Western São Francisco Craton neotectonic traces

2021 ◽  
Vol 41 ◽  
pp. e184588
Author(s):  
Mário Teixeira Rodrigues Bragança ◽  
Luiz Fernando de Paula Barros ◽  
Déborah de Oliveira
Keyword(s):  
Structural Control ◽  
Tectonic Activity ◽  
Asymmetry Factor ◽  
Southeastern Brazil ◽  
Drainage Network ◽  
Catchment Scale ◽  
Stream Length ◽  
Geomorphic Indices ◽  
Fluvial Morphology ◽  
Hypsometric Integral

Recently, geomorphometric properties of river networks and catchments have been described and applied as an efficient tool in the investigation of the landforms' response to neotectonics. Geometric parameters of the Cotovelo River catchment extracted from an Alos-Palsar digital elevation model were used to compute morphometric and geomorphic indices to investigate whether the bedrock structure and recent active tectonics influence the local drainage network. The Cotovelo catchment is situated in the Middle to Upper Proterozoic western foreland basin of the São Francisco craton, in northwestern Minas Gerais, Southeastern Brazil; it is presumed to be a stable piece of earth’s crust. The automatically generated streams were processed at the sub-catchment scale to calculate the hypsometric integral, relief ratio, stream frequency, and drainage density morphometric indices as well as supported a geomorphic study based on the basin shape, asymmetry factor, valley floor width-to-height ratio, mountain front sinuosity, transverse topographic symmetry factor, and stream-length gradient index. Achieved results revealed recent and low-rate tectonic activity and structural control on the fluvial morphology. Prominent knickpoints, aligned with mapped fault scarps, disclose straight erosive fronts away from stratigraphic borders, indicating these features are unrelated to lithological changes. Despite the catchment location, the area exhibits impressive fluvial anomalies, and dissection occurs preferentially along ancient faults and fractures densely occurring in the rocky strata. Channel parallelism in context of medium to high relief and steep slopes, remarkably structurally drive fluvial dissection, asymmetric and elongated drainage catchments, and aligned landforms suggest neotectonic influence on the drainage network.

Late Cenozoic tectonic activity and its significance in the Northern Junggar Basin, Northwestern China

2011 ◽  
Vol 497 (1-4) ◽  
pp. 45-56 ◽  
Author(s):  
Zhengle Chen ◽  
Jian Liu ◽  
Hongliang Gong ◽  
Fengbin Han ◽  
Stephanie Marion Briggs ◽  
...  
Keyword(s):  
Junggar Basin ◽  
Northwestern China ◽  
Tectonic Activity ◽  
Late Cenozoic

scholarly journals A pilot seismo-stratigraphic study on the West Greenland continental shelf

1989 ◽  
Vol 142 ◽  
pp. 1-16
Author(s):  
J.A Chalmers
Keyword(s):  
Petroleum Industry ◽  
Source Rocks ◽  
Tectonic Activity ◽  
The West ◽  
West Greenland ◽  
Main Site ◽  
Half Graben ◽  
Greenland Basin ◽  
Seismic Sections ◽  
Structural Closure

Seismo-stratigraphic interpretation of seismic sections dating from the mid-1970s has disclosed the existence of four megasequences of sediments, the oldest of which has not previously been reported from West Greenland. The basins containing these sediments developed as a series of coalescing half graben, in which the main site of tectonic activity changed with time. A structural closure of sufficient size to contain interesting quantities of hydrocarbons, given suitable source rocks, reservoir and seal, is identified. The study has shown that the evaluation of the West Greenland Basin during the 1970s was inadequate, and that abandonment of exploration by the petroleum industry may have been premature.

scholarly journals A Structural-Thermal Model of the Karkonosze Pluton (Sudetes Mountains, SW Poland) for Hot Dry Rock (HDR) Geothermal Use

2016 ◽  
Vol 61 (4) ◽  
pp. 917-935 ◽  
Author(s):  
Wiesław Bujakowski ◽  
Antoni Barbacki ◽  
Maciej Miecznik ◽  
Leszek Pająk ◽  
Robert Skrzypczak
Keyword(s):  
Central Area ◽  
Tectonic Activity ◽  
Fluid Migration ◽  
Geothermal Resources ◽  
Radiogenic Heat ◽  
Cycle System ◽  
The Earth ◽  
Binary Cycle ◽  
Sw Poland ◽  
Insight Into

Abstract The main objective of this study was to develop a spatial temperature distribution of the Karkonosze Pluton to indicate optimum locations for HDR systems at drillable depth. HDR geothermal technology makes it possible to extract heat from the Earth in areas where no hydro-geothermal resources are present. To produce electricity in a binary cycle, system temperatures of > 100°C are usually required. In this paper, the authors have analysed the potential opportunities for applying HDR technology in the area of the Karkonosze Pluton, which is regarded as an optimum location for the application of the HDR concept (due to the potential for stimulation offered by the mechanical properties of the granites, radiogenic heat production, modern tectonic activity, and the thickness of the pluton). The model used in the analysis, which takes into account a hypothetical assessment of the manner and paths of fluid migration within the pluton, provides an insight into the spatial distribution of subsurface temperatures. It thus allows the location of relatively shallow high-temperature zones, which are optimal for the efficient application of HDR technology, to be identified. With respect to this technology, the Szklarska Poręba area and the NE part of the pluton seem to be better targets than the Cieplice central area, where the model indicated much lower temperatures (e.g. at a depth of 5,000 m, estimated temperatures in the vicinity of Szklarska Poręba were about 185°C and in the vicinity of Cieplice they were about 140°C).

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