Tectonic Geomorphology: A Perspective

Owen, Lewis A.

doi:10.1016/b978-0-12-818234-5.00155-3

Cited by 4 publications

(6 citation statements)

References 59 publications

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“…Regarding this index, structural control of the bedding orientation could play a significant role in basin asymmetry development [2]. The hypsometric integral index plays a significant role in tectonic geomorphology studies [1,3]. This integral index is generally extracted for a particular basin and is a parameter that is independent of a given basin total area.…”

Section: Asymmetric Factor (Af )mentioning

confidence: 99%

“…The hypsometric integral index plays a significant role in tectonic geomorphology studies [1,3]. This integral index is generally extracted for a particular basin and is a parameter that is independent of a given basin total area.…”

Section: Hypsometric Integral Index (Hi)mentioning

confidence: 99%

“…In this paper, we consider analysis of the hypsometric curves and investigate whether the curves are convex in the lower portions, convex to concave in the middle regions, or convex in the upper regions, as well as the Hi index values themselves. Many papers assume that convex curves are usually associated with high Hi values indicating uplift associated with active folds or along faults [1,2,9,19]. Generally, high Hi values are related to relatively young tectonic activity while low values of this index are extracted from landscapes that have been subjected to erosion and few impacts of recent tectonics.…”

Section: Hypsometric Integral Index (Hi)mentioning

confidence: 99%

“…Tectonic geomorphology presents one of the most expanding disciplines integrating tectonics and geomorphology. As the geological branch rapidly develops, it is likely that more attention will be given to quantifying the rates, timing, and magnitude of different landscape evolutions [1]. It is also suggested to incorporate the study of geochronology, geophysics, geodesy, paleoclimatology, remote sensing, and archology, among others [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

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Geospatial Analysis for Relative Seismic Activity Assessment: A Case Study of Fatima Suture Zone in Western Saudi Arabia

Bashir

Alsalman

2023

Sustainability

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In this paper, we state the usefulness of geomorphic analysis, typically applied to highly deformed landforms, to investigate the tectonic geomorphology of an intercontinental structure: the Fatima suture zone. The Fatima suture zone (FSZ) landscape is a tectonically distinct deformation zone along the eastern coast of the Red Sea in western Saudi Arabia providing a complex zone in terms of geology, tectonics, and geomorphology. This zone presents many deformations and fault reactivations that were produced from the effect of horizontal, vertical, and thrust motions as well as deposition and erosion processes. Through several morphometric analyses, remotely sensed data, and geospatial techniques, we recognized the detailed geomorphic surface features of the Fatima suture zone region. Morphometric indices applied in this paper include the stream length gradient index (SL), basin asymmetry factor index (Af), hypsometric integral index (Hi), valley floor width to valley floor height ratio index (Vf), basin shape index (Bs), and mountain front sinuosity index (Smf). Every single morphometric index provides three different relative tectonic classes based on the assigned value ranges. The overall results obtained from the analysis were averaged and presented as an indicator index namely the relative seismic activity (RSA) index, which was classified into four distinct classes from relatively very high to low seismic activity: class 1 is very high seismic activity (CA ≤ 1.5); class 2 is high seismic activity (1.5 < CA ≤ 2); class 3 is moderate seismic activity (2 < CA ≤ 2.5); and class 4 is low seismic activity (CA > 2.5). Additionally, a combination of the two indices (Smf and Vf) was presented as a quantitative model of the relative seismic activity of the examined mountain fronts. The results of the RSA index provided signatures of all four classes of the study region. Two-thirds of the total area of the study region were recorded as high to very high classes in terms of seismic activity. The paper finally concludes that this integration method allows assessment and evaluation of the highly deformed landscapes related to active tectonism. Despite the impact of the Fatima suture zone providing low to medium activities in some parts, it has a signature control on the recent landscape evolution.

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Section: Asymmetric Factor (Af )mentioning

confidence: 99%

Section: Hypsometric Integral Index (Hi)mentioning

confidence: 99%

Section: Hypsometric Integral Index (Hi)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Geospatial Analysis for Relative Seismic Activity Assessment: A Case Study of Fatima Suture Zone in Western Saudi Arabia

Bashir

Alsalman

2023

Sustainability

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“…Tectonic geomorphology is a relatively young subdiscipline of geomorphology and has the major aim of unraveling interactions between tectonic activity, climate, and Earth surface processes (Wobus et al, 2005;Owen, 2013). The grainsize distribution of riverbed material, channel width, channel sinuosity, extent of alluvial cover, lithology of bedrock, and hydraulic roughness are all potentially important variables (Whipple, 2004;Whittaker et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Response of modern fluvial sediments to regional tectonic activity along the upper Min River, eastern Tibet

Shi

Jiang

et al. 2022

Earth Surf. Dynam.

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Abstract. The deposition of fluvial sediments in tectonically active areas is mainly controlled by tectonics, climate, and associated Earth surface processes; consequently, fluvial sediments can provide a valuable record of changes in regional climate and tectonic activity. In this study, we conducted a detailed analysis of the grain-size distribution in modern fluvial sediments from the upper Min River, eastern Tibet. These data, combined with information on regional climate, vegetation, hydrology, geomorphology, lithology, and fault slip rate, indicate that modern regional tectonic activity along upper Min River can be divided into three segments. Specifically, fluvial sediments in the Minjiangyuan–Diexi segment are dominated by silts (< 63 µm, 70.2 %), agreeing with low runoff, low rainfall, and high vegetation cover and revealing a windblown origin influenced by the arid and windy climate. These observations are consistent with the low hillslope angle and low relief, all indicating weak activity along the Minjiang Fault. The coarse-grained fraction (> 250 µm) of fluvial sediments in the Diexi–Wenchuan and Wenchuan–Dujiangyan segments increases stepwise downstream, although runoff and rainfall do not change significantly. These patterns correlate well with increases in both regional relief and hillslope angles. Together, these observations imply that regional tectonic activity along the Maoxian–Wenchuan Fault becomes more pervasive downstream along the Min River. The occurrence of well-sorted and well-rounded pebbles of fluvial sediments downstream of Dujiangyan must be related to the long-time scouring and sorting by rivers. This study marks the first development of a new research approach that can characterize regional tectonic activity by analysis of grain-size distribution of fluvial sediments collected from tectonically active regions.

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Design and Construction of Lightweight Domain Ontology of Tectonic Geomorphology

Xi,

Wu,

2023

J. Earth Sci.

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Tectonic Geomorphology: A Perspective

Cited by 4 publications

References 59 publications

Geospatial Analysis for Relative Seismic Activity Assessment: A Case Study of Fatima Suture Zone in Western Saudi Arabia

Geospatial Analysis for Relative Seismic Activity Assessment: A Case Study of Fatima Suture Zone in Western Saudi Arabia

Response of modern fluvial sediments to regional tectonic activity along the upper Min River, eastern Tibet

Design and Construction of Lightweight Domain Ontology of Tectonic Geomorphology

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