Article
Environmental Sciences
Kainan Shen, Shaopeng Dong, Yizhou Wang
Summary: This study used geomorphic parameters to indicate tectonic activity in the Sertengshan area and explored the state of the drainage basin. The results showed spatial variation in tectonic activity, with strong activity in the western part of the southern Sertengshan region and the northern part corresponding to the turning point of the fault. Most of the Sertengshan area is in the mature and old stages of geomorphological evolution, with some areas in the juvenile stage. The migration of the drainage divide is influenced by tectonic activity and tends to move towards the direction of lower tectonic activity.
Article
Multidisciplinary Sciences
Abdullah T. Othman, Abdulla Amir Omar
Summary: This study examines the active tectonics along the Bamo anticline through quantitative analyses of geomorphic indices. The results indicate that the region exhibits high to moderate tectonic activity, with 38% and 56% of the area classified as high and moderate activity, respectively, and 6% classified as low activity.
Article
Geography, Physical
Bernard Delcaillau, Fabien Graveleau, Dimitri Saint Carlier, Gang Rao, Maryline Le Beon, Julien Charreau, Maelle Nexer
Summary: This study conducted a detailed analysis of the Qiulitage fold belt in the Kuqa foreland based on open-access DEMs and field work. The results indicate that the fold belt consists of six morphological units and has undergone interactions during vertical growth and lateral propagation of the folds. The structural evolution of the fold belt has significantly influenced the development of major rivers and minor rivers.
Article
Geosciences, Multidisciplinary
Daniel L. Morel, Kristin D. Morell, Edward A. Keller, Tammy M. Rittenour
Summary: In this study, new age constraints from marine terraces along the Gaviota coast were used to quantify rock uplift rates in the westernmost 60 km of the Transverse Ranges. The results showed that the uplift rates in this region are significantly higher than previous estimates, and the distribution of uplift rates is related to the structures of the Santa Ynez fault.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2022)
Article
Geosciences, Multidisciplinary
Yiqi Ji, Shengrui Su, Zhiheng Liu, Qiangbing Huang
Summary: The study of the middle reaches of the upstream of Jinsha River based on tectonic geomorphology provides insights into the tectonic transition and active tectonics in the region. Geomorphic indices were calculated and analyzed, indicating strong tectonic activities in certain areas and a rapid uplift of the region.
GEOLOGICAL JOURNAL
(2021)
Article
Geosciences, Multidisciplinary
Yi Long, Hanlin Chen, Xiaogan Cheng, Hongdan Deng, Xiubin Lin
Summary: Paleo-uplift amplitude significantly influences salt-related deformations in salt-bearing fold-and thrust belts (FTBs), leading to changes in strain localization and salt distribution. Increasing paleo-uplift amplitude results in stronger effects on deformation propagation and can cause out-of-sequence deformation towards the hinterland.
JOURNAL OF STRUCTURAL GEOLOGY
(2021)
Article
Environmental Sciences
Long Guo, Zhongtai He, Linlin Li
Summary: Based on a DEM and GIS technology, this study analyzed stream geomorphic indices in the northern segment of the Red River fault zone. The results show that the indices values are higher along the Cangshan Piedmont Fault, followed by the Fengyi-Dingxiling Fault, and lowest along the Midu Basin Margin Fault. Neotectonic activity is inferred to be the main factor controlling the development of drainage geomorphology. The activity level of the Red River fault zone decreases from north to south.
Article
Geochemistry & Geophysics
Fengnian Chang, Shaochun Dong, Hongwei Yin, Zhenyun Wu, Wei Wang
Summary: Quantifying the kinematics of subaerial salt and understanding its correlation with geomorphic, tectonic, and climatic factors is crucial in exploring the interactions between Earth's spheres. This study integrated various datasets to explore the potential correlation between subaerial salt motions and geomorphic, tectonic, and climatic factors in the Kuqa fold-thrust belt (KFTB), NW China. The research revealed a maximum of 25 mm/yr vertical and 40 mm/yr horizontal surface salt deformation in the KFTB from 2014 to 2020, indicating a gravity spreading dominant system influenced by topography and weather variables.
Article
Environmental Sciences
Ndema Mbongue Jean-Lavenir, Tume Noela Kiki, Lemnyuy Prosper Yiika, Godlove Muh Ndi
Summary: The study aims to analyze the geochemical distributions of elements in stream sediment in the Pouma area of Cameroon to assess trace metal contamination, sources of pollution, and ecological risks. Samples were analyzed by inductively coupled plasma-mass spectrometer. The results show high contents of Fe2O3, Mn, Th, Zr, Sr, Au, V, Y, rare earth elements, and depletion of other elements in stream sediments. Factor analysis reveals five factors explaining 88.74% of cumulative variance. Assessment of pollution load index, enrichment factor, integrated nemerow pollution load index, and potential ecological risk index indicates sediment contamination and metal pollution, mainly from mafic lithology, quarrying, domestic activities, and agricultural practices. The findings of this study provide valuable insights for sediment management in the area.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Geochemistry & Geophysics
Patcharaporn Maneerat, Roland Burgmann, Paul M. Betka
Summary: This study investigates the evolution of the Indo-Burma Range's outer fold-and-thrust belt using geomorphic and kinematic analyses. The findings suggest alternating periods of thrust belt propagation and fault reactivation in the outer belt, and the shapes of ante-cendent stream profiles crossing the active thrust belt can provide information about the sequence of ramp propagation.
Article
Geochemistry & Geophysics
S. A. Mahmood, M. Shahzad, S. Batool, A. Amer, I. S. Kaukab, A. Masood
Summary: The collision of the Eurasian and Indian plates has created two subduction zones with complex geomorphology, where a study utilizing DEM-based geomorphometry was conducted to investigate active faults and deformations due to the collision. Through various analyses and validations, the study revealed the high activity of deformed zones associated with neotectonics.
Article
Geography, Physical
Chirag Jani, Raj Sunil Kandregula, Suraj Bhosale, Anil Chavan, Abhishek Lakhote, Subhash Bhandari, Girish Ch Kothyari, Gaurav Chauhan, Rakesh K. Dumka, D. Suri Babu, Adarsh Thakkar, Ajay Kumar Taloor, Anil Gor, M. G. Thakkar
Summary: The study identified tectonically active zones along the Island Belt Uplift (IBU) by analyzing the Normalized Steepness Index (Ksn) and morphotectonic features, showing that Pachham Uplift (PU) and Bela Uplift (BU) are the most active, Khadir Uplift (KU) exhibits moderate activity, and Chorar Uplift (CU) is least active. The results were validated by comparing with Gradient Length Anomaly (GLA) and Differential Interferometric Synthetic Aperture Radar (DInSAR) data, indicating ongoing seismic activities in the identified active zones. Active deformation rates were calculated using Global Positioning System (GPS) data, and the results were consistent with the Ksn analysis.
QUATERNARY SCIENCE ADVANCES
(2021)
Article
Geosciences, Multidisciplinary
P. Jara, S. Herrera, M. Villarroel, L. Pinto, D. Yagupsky, C. Guzman, M. Gutiwrrez
Summary: Andean fold-and-thrust belts (FTBs) in the western border of South America exhibit variations in structural style and shortening magnitudes. These variations can be influenced by factors such as depth-to-detachment, geometry and thickness of basins, structural highs, competency of units involved in deformation, pre-orogenic structure, rheological state of upper crust, and latitudinal gradients in shortening. Analogue models have shown that the presence of a competent block significantly influences the structural configuration and leads to greater topographic uplift within a doubly-vergent thrust system.
JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
(2023)
Article
Geology
Liu Xiang, Zhan QiongYao, Zhu DiCheng, Wang Qing, Xie JinCheng, Zhang LiangLiang
Summary: This study investigates detrital zircon U-Pb ages and Hf isotopic data from sandstone samples in the Late Triassic deposits in the southern Songpan-Ganzi fold belt in SW China. The results suggest that the sediments were likely derived from the South China Block and the Yidun Terrane, and experienced rapid uplift and exhumation within 18Myr during the Late Triassic.
ACTA PETROLOGICA SINICA
(2021)
Article
Geosciences, Multidisciplinary
Halil Zorer, Yahya Ozturk, Azad Saglam Selcuk
Summary: This study focuses on a specific region in the northern part of the Bitlis-Zagros Fold-Thrust Belt, where the effects of different active deformation structures, such as Hakkari and Sirvan Fault Segments, on topographic development were investigated. The results show that these structures have varying effects on the region's topography.
TURKISH JOURNAL OF EARTH SCIENCES
(2023)
Article
Geography, Physical
A. Securo, C. Del Gobbo, L. Rettig, S. Pillon, A. De Luca, D. Fontana, E. Benedetti Fasil, R. R. Colucci
Summary: Small glaciers in temperate mountain regions have experienced significant reduction and unprecedented melt rates in recent years. Some glaciers have transitioned from clean ice to debris-covered or even rock glaciers. This study examines the surface elevation change of the Popera Alto glacier in the Sesto Dolomites using LiDAR and Structure from Motion surveys, and analyzes its evolution in terms of surface cover and geomorphic processes. The glacier has lost an average of 0.35 m water equivalent per year over the past 16 years, with active modification of its surface cover by geomorphic processes. The role of debris and local topography feedback has allowed the resilience of the glacier, leading to a marked difference between the current environmental equilibrium line altitude (envELA) and the effective ELA (effELA) of the glacier.
Article
Geography, Physical
Zhenzhen Yan, Yaolin Shi, Lili Kang, Xiangtao Fan
Summary: This study proposes a quantitative regional deformation model based on global positioning system (GPS) data to quantitatively analyze the morphological evolution of rivers in the Three Rivers Region. It finds that tectonic deformation phases significantly control regional landscape development and drainage features.
Article
Geography, Physical
Said Mukhtar Ahmad, Nitheshnirmal Sadhasivam, Mona Lisa, Luigi Lombardo, Mustafa Kemal Emil, Amira Zaki, Cees J. Van Westen, Islam Fadel, Hakan Tanyas
Summary: In this study, we investigated a large slow-moving landslide in Northern Pakistan, using Interferometric Synthetic Aperture Radar (InSAR) analysis. Our results showed that the crown of the landslide is moving faster than the surrounding regions, while the footslope experienced high deformations. We discussed the possible roles of meteorologic and anthropogenic factors in causing these deformations.
Article
Geography, Physical
Shuang Bian, Xibin Tan, Yiduo Liu, Suoya Fan, Junfeng Gong, Chao Zhou, Feng Shi, Michael A. Murphy
Summary: The Yarlung River's drainage divide is primarily moving north due to variations in precipitation across the Himalayas. The Gangdese drainage divide shows predominantly northward and southward migration, controlled by base-level rise and downstream influences. The presence of north-trending rifts separates the drainage divides into five zones, each with a distinct migration pattern.
Article
Geography, Physical
Joon-Young Park, Seok Yoon, Deuk-Hwan Lee, Seung-Rae Lee, Hwan-Hui Lim
Summary: This study developed a multiple-regression model to estimate site-specific average growth rates of debris flow events. The proposed model was validated through a case study and showed reasonable predictions of debris flow velocities and heights.
Article
Geography, Physical
Nicholas Reilly Mccarroll, Arnaud Temme
Summary: New geochronological data from hillslope boulder armor in the Flint Hills reveal the rates and timing of lateral retreat in the landscape. Surfaces of limestone boulders dating back to the Pleistocene era were found, and the ages of the hillslope armor increased with distance from the limestone bench. The estimated rate of lateral retreat in this landscape is 0.02 mm/yr.
Article
Geography, Physical
Xinbo Yao, Yuntao Tian
Summary: By studying the Longmenshan-Minshan drainage divide, we found that it has reached a dynamic steady state, indicating a balance between erosion and rock uplift. This study also reveals the process of formation and evolution of the divide and raises questions about the effectiveness of divide migration metrics.
Article
Geography, Physical
Junhui Yu, Pin Yan, Yanlin Wang, Guangjian Zhong, Changliang Chen
Summary: The seafloor mounds in the Chaoshan Depression of the South China Sea are identified as mud volcanoes, with fluids coming from underlying mud-fluid diapirs. The hydrocarbon gases feeding the mud volcanoes and diapirs are reasoned to originate from deep Mesozoic source rocks, indicating significant Mesozoic hydrocarbon potential in the Chaoshan Depression.
Article
Geography, Physical
Marius Huber, Luc Scholtes, Jerome Lave
Summary: This paper investigates the relationships between hillslope stability and fabric anisotropy of brittle rock materials and the implications for landscape shaping. It explores the different stability modes and movement characteristics of anisotropic materials, and demonstrates the significant control of material anisotropy on landscape shaping.
Article
Geography, Physical
Shubhra Sharma, Anil D. Shukla
Summary: The study investigates the relationship between glacial dynamics and lake sedimentation during the mid-Holocene climate variability in the Southern Zanskar ranges. It utilizes geomorphological disposition, elemental geochemistry, and optical chronology of relict lake sediment to reconstruct the pattern of minor glacier responses to climate variability. The results indicate six centennial to millennial-scale climatic phases, with warmer phases represented by decreased mineralogical fine grain flux and increased coarse grain flux. The study highlights the potential of relict lake sediment and para/peri-glacial landforms in understanding glacial dynamics and climate change during the Holocene.
Article
Geography, Physical
Jean-Francois Bernier, Sydney W. Meury, Patrick Lajeunesse
Summary: In this study, an approach combining various data and observation methods was proposed to improve the monitoring of landfast ice dynamics and its geomorphic impact on sedimentary systems. The results demonstrate the ability of the approach to accurately measure interannual variations in landfast ice and constrain geomorphic changes. Additionally, the study found a strong relationship between the severity of freezing seasons and the response of landfast ice to hydrometeorological events, with different geomorphic responses observed under different winter conditions.
Article
Geography, Physical
Heping Shu, Fanyu Zhang
Summary: This study investigates the relationship between susceptibility of soil-water hazards and human activities, geoheritage sites in the Loess Plateau, China. Landslide and gully erosion susceptibility were obtained using gradient boosting and support vector machines, and a hazard matrix was formed to couple landslide and gully erosion susceptibility. The study found different trends in the magnification times of soil-water hazards chain under different scenarios.
Article
Geography, Physical
Guangqiang Qian, Zhuanling Yang, Xuegang Xing, Zhibao Dong, Youyuan Guo
Summary: Granule ripples are aeolian landforms armored against erosion by coarse grains. This study investigates their seasonal morphological evolution and migration in the Sanlongsha Dune Field. The findings show that wind events, especially those exceeding the threshold velocities of coarse grains, significantly influence the morphodynamics of granule ripples. The study highlights the importance of considering the reptation and saltation of coarse grains in future research on granule ripples.