Article
Geochemistry & Geophysics
Q. Tang, J. Geersen, A. Duering, D. Unverricht, J. Schneider von Deimling, K. -F. Lenz, W. Li, S. Krastel
Summary: Submarine mega-slides in the Sahara Slide Complex pose a major threat to offshore infrastructure and can trigger devastating tsunamis. New hydroacoustic data reveals the complex morphology of the slides, and through sediment dating, the history of slope failures in the headwall area has been reconstructed, showing a long-lasting series of events over thousands of years.
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
(2022)
Article
Geochemistry & Geophysics
Yipeng Li, Alexander C. Robinson, Michele Zucali, Mustafo Gadoev, Ilhomjon Oimuhammadzoda, Thomas J. Lapen, Barbara Carrapa
Summary: The deformation history of the Pamir region, which has been less well-documented, has been investigated, revealing the presence of regional thrust faults. Dating results indicate that there was uplift along these faults in the Early Cretaceous, providing insights into the mechanisms of crustal deformation in the Pamir region.
Article
Engineering, Geological
Yan Yan, Sheng Hu, Kailai Zhou, Wen Jin, Ning Ma, Cheng Zeng
Summary: Debris flows in China, particularly in the western mountainous areas such as the Qilian Mountains, have been on the rise in recent years due to extreme climate events and earthquakes. Our study analyzed a debris flow triggered by an extreme rainstorm in the Qilian Mountains and provided guidance for the prevention and control of such hazards.
Article
Engineering, Environmental
Yaspal Sundriyal, Vipin Kumar, Firoz Khan, Mohit Kumar Puniya, Sameeksha Kaushik, Neha Chauhan, Dhirendra Singh Bagri, Naresh Rana
Summary: Floods in the Himalayas, particularly in the NW Himalaya, are increasing due to climate change. Two major flood events in Uttarakhand, NW Himalaya, have resulted in over 6000 deaths in the past decade. This study investigates the potential impact of floods on a riverbank slope and evaluates the stability and debris flow runout during extreme rainfall. The results indicate that the slope material may displace forward by approximately 0.12-0.4 m, and the potential debris flow may exert pressure on the retaining wall up to 150 k Pa. The potential flood may strike the riverbank with a velocity of 10 +/- 2 m/s and a stream power of 0.2 +/- 0.1 M N/m-s, which is three times higher than the resistance of the retaining wall.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Environmental Studies
Laura Turconi, Domenico Tropeano, Gabriele Savio, Barbara Bono, Sunil Kumar De, Marco Frasca, Fabio Luino
Summary: Debris flow is a highly dangerous natural process in mountain regions, posing a significant threat to residents and territories. This study investigates debris flow hazard in urban areas on Alpine alluvial fans in Italy and proposes prevention strategies based on historical research and simplified analytical approaches.
Article
Environmental Sciences
Andrew W. Dale, David Clemens, Kirstin Dahnke, Frederike Korth, Scott D. Wankel, Ulrike Schroller-Lomnitz, Klaus Wallmann, Stefan Sommer
Summary: Benthic nitrogen cycling in the Mauritanian upwelling region was studied in 2014, revealing higher NH4+ and PO43- fluxes on the shelf possibly linked to declining bottom water O2 concentrations. The isotopic fractionation of nitrate uptake and elevated (18):(15) ratios on the shelf suggest aerobic ammonium oxidation and nitrite oxidation activities due to oxygen deficiency.
FRONTIERS IN MARINE SCIENCE
(2022)
Article
Environmental Sciences
Davide Notti, Daniele Giordan, Alberto Cina, Ambrogio Manzino, Paolo Maschio, Iosif Horea Bendea
Summary: The use of Remotely Piloted Aircraft Systems (RPAS) has significantly improved the characterization and monitoring of landslides in the past decade. RPAS is particularly effective in studying areas prone to geohazards, providing high-resolution orthophotos and digital surface models for better understanding and mapping of affected areas.
Article
Geology
Harya D. Nugraha, Christopher A-L Jackson, Howard D. Johnson, David M. Hodgson, Michael A. Clare
Summary: Submarine slides are major geohazards that can trigger tsunamis and damage submarine infrastructure. Our study quantified the erosive potential of submarine slides and found that the slide volume tends to increase after the initial failure. This has important implications for hazard assessments and impact assessments of submarine infrastructure.
Article
Environmental Sciences
C. E. Ramos-Scharron, E. Y. Arima, K. S. Hughes
Summary: The study investigates the landslide densities induced by rainfall associated with Hurricane Maria in Puerto Rico. Results show that landslide densities tend to be higher in areas with higher rainfall totals and igneous intrusive and other non-limestone sedimentary geologic terranes. The maximum densities occur on moderate slopes of 35-50%, rather than the steepest hillslopes. The regression model provides an acceptable fit for landslide densities at a 0.25 km(2) scale.
PHYSICAL GEOGRAPHY
(2022)
Article
Geography, Physical
Kayla M. Irizarry, James D. Witts, Matthew P. Garb, Anastasia Rashkova, Neil H. Landman, Mark E. Patzkowsky
Summary: The bolide impact-66 million years ago near Chicxulub triggered a global mass extinction. A new study in Texas provides detailed evidence of sediment flows and debris flows resulting from the impact. These findings highlight the importance of sediment transport in shaping post-impact environments.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Song Jing, Tiago Alves, Kamal'deen O. Omosanya
Summary: This paper investigates the slope instability styles and their origins on the northwest flank of the Storegga Slide complex by interpreting high-quality seismic data. The findings reveal that early instability is primarily driven by fluid accumulation in glacial-marine deposits, while vertically stacked intervals with weak layers and older landslide deposits further promote instability.
Article
Geology
Eduardo Menozzo da Rosa, John L. Isbell, Natalie Mcnall, Nicholas Fedorchuk, Roger Swart
Summary: The stratigraphic architecture of fjords is complicated due to the interplay between ice dynamics, sediment supply, relative sea-level fluctuations, and slope failures. This paper showcases the geomorphology and depositional history of the Orutanda fjord in Namibia as an example of a fjord basin dominated by subaqueous gravitational processes during a glacial cycle.
Article
Multidisciplinary Sciences
Sen Wang, Hanwu Zheng, Er Huang, Xingnian Liu, Ming Luo
Summary: Flash floods in mountainous regions have caused significant damage globally in recent years, affecting and destroying structures. The impact load of flash floods is a crucial factor in the destruction process. This study compared and analyzed five existing models for calculating impact pressure based on experimental data. Moreover, a new model considering both hydrodynamic and hydrostatic pressure was proposed by combining two existing models. The results showed improved accuracy in the new model, with reduced relative errors for empirical coefficients. Additionally, the distribution of fluid impact and the maximum pressure point against a passable obstacle were discussed. The findings of this research could contribute to ideas for designing structures that can withstand flood impact.
Article
Environmental Sciences
Christopher Gomez, Norifumi Hotta
Summary: This study used a earthquake that occurred in the Iburi mountains in 2018 as a case study to analyze the planar and vertical parameters of mass movements. The findings showed that seismic-triggered mass movements have higher effective stress and ground acceleration compared to rain-triggered mass movements.
Article
Astronomy & Astrophysics
M. Voelker, J. Ruiz, L. M. Parro, E. Hauber, A. Cardesin-Moinelo, P. Martin
Summary: During a grid-mapping campaign on Mars' southern hemisphere, researchers identified sheet flow deposits in Dryas Mons region, distinct from standard viscous-flow features in terms of formation processes and volatile involvement. These deposits may have originated from melting and mobilisation of volatiles due to magmatic and tectonic activities, leading to slow and laminar movement characteristics.
Article
Geography, Physical
Arne Lohrberg, Klaus Schwarzer, Daniel Unverricht, Andreas Omlin, Sebastian Krastel
JOURNAL OF QUATERNARY SCIENCE
(2020)
Article
Multidisciplinary Sciences
Thomas Wilke, Torsten Hauffe, Elena Jovanovska, Aleksandra Cvetkoska, Timme Donders, Klemens Ekschmitt, Alexander Francke, Jack H. Lacey, Zlatko Levkov, Charles R. Marshall, Thomas A. Neubauer, Daniele Silvestro, Bjoern Stelbrink, Hendrik Vogel, Christian Albrecht, Jens Holtvoeth, Sebastian Krastel, Niklas Leicher, Melanie J. Leng, Katja Lindhorst, Alessia Masi, Nadja Ognjanova-Rumenova, Konstantinos Panagiotopoulos, Jane M. Reed, Laura Sadori, Slavica Tofilovska, Bert Van Bocxlaer, Friederike Wagner-Cremer, Frank P. Wesselingh, Volkmar Wolters, Giovanni Zanchetta, Xiaosen Zhang, Bernd Wagner
Article
Geography, Physical
E. Lebas, R. Gromig, S. Krastel, B. Wagner, G. Fedorov, C. Goertz, T. Averes, D. Subetto, M. Naumenko, M. Melles
Summary: Seismic reflection data and sediment core data provide insight into the environmental and sedimentological history of Lake Ladoga since the late Quaternary, including basin bedrock reshaping, post-glacial mound formation, deglaciation sedimentation, and Holocene lacustrine sedimentation. Major fault systems and unconformities related to lake-level fluctuations were also identified in the study.
QUATERNARY SCIENCE REVIEWS
(2021)
Article
Geochemistry & Geophysics
R. S. Barrett, B. Bellwald, P. J. Talling, A. Micallef, F. Gross, C. Berndt, S. Planke, R. Myklebust, S. Krastel
Summary: Submarine landslides can be significantly larger than their terrestrial counterparts and can pose significant hazards across entire ocean basins. The failure mechanism strongly controls the associated tsunami hazard. The Tampen Slide, one of the largest landslides on Earth, was found to have failed mainly as a single volume along a single failure surface, differing significantly from other giant submarine landslides that seem to have failed in multiple phases and involving multiple failure surfaces.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Geosciences, Multidisciplinary
Salvatore Gambino, Giovanni Barreca, Felix Gross, Carmelo Monaco, Sebastian Krastel, Marc-Andre Gutscher
Summary: Marine seismic reflection data and on-land structural measurements have improved our understanding of the active deformation patterns of the Malta Escarpment in Eastern Sicily. The Malta Escarpment is believed to play a significant role in the seismic framework of the area, with identified faults having the potential to generate significant seismic events. The study suggests that observed deformation may have been caused by non-tectonic processes, and certain faults in the region could pose a high seismic risk with the potential for M > 7 earthquakes.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Environmental Sciences
Andreas Kluegel, Miriam Roemer, Paul Wintersteller, Kai-Frederik Lenz, Sebastian Krastel, Heinrich Villinger, Norbert Kaul
FRONTIERS IN MARINE SCIENCE
(2021)
Review
Geosciences, Multidisciplinary
G. Barreca, F. Gross, L. Scarfi, M. Aloisi, C. Monaco, S. Krastel
Summary: Research on the Messina-Reggio Calabria earthquake suggests that the causative seismic source is still unknown, but analysis of new geological data and relocated seismicity can help to better understand the tectonic deformation in the area. Additionally, the discovery of an unknown extensional fault through geophysical surveys indicates its potential relationship with seismic activity in the region.
EARTH-SCIENCE REVIEWS
(2021)
Article
Geography, Physical
Arne Lohrberg, Sebastian Krastel, Daniel Unverricht, Klaus Schwarzer
Summary: Glacial landforms in the North Sea basin have been studied using geophysical methods to reconstruct ice sheet dynamics during the Pleistocene. This study focuses on the structural analysis of sediments in the southeastern North Sea, revealing a larger-than-expected Heligoland Glacitectonic Complex formed by ice advance from the southeast. The study presents alternative models for the formation of the complex and suggests a potential influence of salt structures on its location.
Article
Geography, Physical
Raphael Gromig, Elodie Lebas, Larisa Savelieva, Zina Pushina, Grigory Fedorov, Dominik Brill, Marlene Margit Lenz, Sebastian Krastel, Bernd Wagner, Nataliya Kostromina, Mark Mustafin, Martin Melles
Summary: The study of Lake Taymyr in the central Russian Arctic revealed two lowstands and two highstands of the lake level, with the current level about 5 meters above sea level during summer. An ice sheet was confirmed to have blocked the drainage of Lake Taymyr during the latest Weichselian. Data indicate that the evolution of Lake Taymyr involved a complex interplay of regional climatic, glacial, and sea-level changes.
JOURNAL OF QUATERNARY SCIENCE
(2022)
Article
Geography, Physical
Matthias Lenz, Elodie Lebas, Marlene M. Lenz, Grigory Fedorov, Raphael Gromig, Vasili Kolka, Sebastian Krastel, Niklas Leicher, Martin Melles, Bernd Wagner
Summary: The study on Lake Imandra in the Kola Peninsula reveals the dynamics of sediment deposition and the potential influences of complex current systems. The complex morphology of the lacustrine basin favored sediment accumulation in depressions, while strong wind-induced surficial currents and compensatory subsurface currents prevented sediment accumulation.
JOURNAL OF QUATERNARY SCIENCE
(2022)
Article
Geosciences, Multidisciplinary
S. C. Fabbri, C. Affentranger, S. Krastel, K. Lindhorst, M. Wessels, Herfried Madritsch, R. Allenbach, M. Herwegh, S. Heuberger, U. Wielandt-Schuster, H. Pomella, T. Schwestermann, F. S. Anselmetti
Summary: Probabilistic seismic hazard assessments are primarily based on instrumentally recorded and historically documented earthquakes, and for areas with low earthquake recurrence rates like the northern European Alpine Arc, it is necessary to extend perspectives beyond existing earthquake catalogs. Lake Constance in the North-Alpine Molasse Basin is investigated as an ideal (neo-) tectonic archive, surrounded by major tectonic structures and studied through multi-channel reflection seismic data and bathymetric maps.
FRONTIERS IN EARTH SCIENCE
(2021)
Review
Geosciences, Multidisciplinary
G. Barreca, F. Gross, L. Scarfi, M. Aloisi, C. Monaco, S. Krastel
Summary: In response to the paper by Barreca et al. (2021) on the source of the 1908 earthquake in the Strait of Messina, Pino et al. (2021) argued that the source mechanism is based on incorrect assumptions and internal inconsistencies. However, the authors of the original paper strongly defend the scientific validity of their model, rejecting the criticisms made by PIN2021.
EARTH-SCIENCE REVIEWS
(2021)
Editorial Material
Geosciences, Multidisciplinary
G. Barreca, F. Gross, L. Scarfi, M. Aloisi, C. Monaco, S. Krastel
Summary: This article comments on a paper by Barreca et al. (2021) on the 1908 earthquake and discusses the new seismotectonic model and possible source fault proposed by the authors. The commenter challenges the claim that the W-Fault is no longer active and questions the lack of data supporting its offshore occurrence. They demonstrate that the interpretation provided by the original paper is flawed and reaffirm the existence and current activity of the W-Fault in the offshore area.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geography, Physical
Matthias Lenz, Marlene M. Lenz, Andrei Andreev, Stephanie Scheidt, Raphael Gromig, Elodie Lebas, Grigory Fedorov, Sebastian Krastel, Martin Melles, Bernd Wagner
Summary: The analysis of core Co1401 from Lake Levinson-Lessing provides insights into the environmental and climatic history of the Taymyr Peninsula over the past 62 kyr. The data indicates stable environmental conditions with subtle changes between different Marine Isotope Stages, influenced by precipitation patterns and large ice sheets outside of the peninsula. MIS 1 is associated with warmer and wetter conditions and short-term climate fluctuations influenced by North Atlantic air masses.
JOURNAL OF QUATERNARY SCIENCE
(2022)
Article
Geography, Physical
A. Ulfers, C. Zeeden, B. Wagner, S. Krastel, H. Buness, T. Wonik
Summary: Robust age-depth models are crucial for interpreting the sedimentological history of lake basins. This study presents a new approach to construct age-depth models by integrating downhole logging and seismic survey data, demonstrated using data from Lake Ohrid. The method includes cross-validation and cyclostratigraphic methods to verify the accuracy of the models.
QUATERNARY SCIENCE REVIEWS
(2022)
Article
Geosciences, Multidisciplinary
Weijiao Ma, Jinbu Li, Min Wang
Summary: The petroleum resource assessment obtained from laboratory tests on old core samples tends to underestimate the in situ resources. This study investigates the hydrocarbon loss and restoration by comparing preserved and exposed core samples. It is found that previous studies have severely underestimated the in situ hydrocarbon potential due to factors such as sample crushing and crucible waiting. A new restoration model is proposed to compensate for these losses.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Shaoyun Chen, Yongqiang Yang, Longwei Qiu, Xiaojuan Wang, Erejep Habilaxim
Summary: Quartz cement is an important authigenic mineral in the tight sandstones of the Shaximiao Formation in the Sichuan Basin. This study analyzed the silicon sources of the quartz cement using mineralogical, fluid inclusion, and geochemical data. The results showed that smectite alteration and dissolution of aluminosilicate minerals were the primary sources of silicon for quartz cementation. Contributions from volcanic material hydrolysis and pressure solution were relatively minor. The presence of chlorite films inhibited the development of quartz overgrowths and had minimal impact on reservoir quality.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Xing Jian, Ping Guan, Ling Fu, Wei Zhang, Xiaotian Shen, Hanjing Fu, Ling Wang
Summary: This study presents a synthesis of new detrital zircon dating results and published data from the Cenozoic Qaidam basin, revealing the spatiotemporal variation of detrital zircon age populations and supporting models of synchronous deformation in northern Tibet. The study emphasizes the importance of considering textural and sedimentological parameters in zircon provenance interpretations, as well as the need for integrated provenance analysis involving other detritus components.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
A. Peketi, G. Sriram, A. Mazumdar, P. Dewangan, A. Zatale, V. Rajurkar, Gayatri Shirodkar, V. Mahale, V. Yatheesh
Summary: This study investigates 13 submarine seamounts in the southern Andaman volcanic arc and observes evidence of hydrothermal activity in one of the seamounts. The evidence includes plumes rich in dissolved gases, live chemosymbiotic organisms, and the deposition of neoforming minerals. These observations suggest the development of a new hydrothermal field in the least explored Andaman Sea.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Yanxian Zhu, Zhiliang He, Xiaowen Guo, Long Li, Sheng He, Jian Gao, Shuangjian Li, Huili Li
Summary: This study investigates the fluid evolution history of the hydrothermal dolomite reservoir in the Middle Permian Maokou Formation in the Sichuan Basin. The results reveal the diagenetic sequences, mineral origins, salinity history, and pressure evolution using various analytical techniques. The findings provide important insights into the gas charge, escape, and preservation conditions of the reservoir.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Rafaella de Carvalho Antunes, Julia Campos Guerrero, Ricardo Jorge Jahnert
Summary: This study presents a detailed sedimentary model and identifies various sedimentary facies associations in the coquina deposits of the Itapema Formation in the offshore pre-salt Buzios Field of the Santos Basin. These facies associations were primarily influenced by waves and currents and reflect a complex depositional system.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Kang Meng, Tongwei Zhang, Deyong Shao, Xiuyan Liu, Hui Song, Heng Peng
Summary: In this study, an integrated method of measuring optical reflectance and Raman spectroscopy is proposed to accurately determine the thermal maturity of Lower Cambrian shales in South China. The results show that this method is reliable and effective, and it has important implications for analyzing overmature shale.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Mohamed A. K. El-Ghali, Olga Shelukhina, Iftikhar Ahmed Abbasi, Mohamed S. H. Moustafa, Osman Salad Hersi, Numair A. Siddiqui, Khalid Al-Ramadan, Abdullah Alqubalee, Abdulwahab Muhammad Bello, Abduljamiu O. Amao
Summary: This study employs an integrated depositional and sequence stratigraphic approach to assess the control of diagenesis on reservoir porosity of a hybrid-energy delta system. The study focuses on the Barik Formation in the Haushi-Huqf region of Central Oman, which represents a highstand system tract of a hybrid-energy delta. The assessments reveal that the reservoir porosity is controlled by various degrees of diagenetic processes, including mechanically infiltrated clays and kaolinitization of silicate grains.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Xiaocan Yu, Chunlian Wang, Hua Huang, Kai Yan
Summary: Oilfield brines are a significant alternative lithium resource. This study investigates the metallogenic characteristics and enrichment process of oilfield brines from the Jianghan Basin, central China using chemical and multi-isotope data. The results suggest that lithium enrichment in these brines is the result of interaction with clastic host rocks and dilution by meteoric water.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Jianghao Qiao, Xiwu Luan, Thanuja D. Raveendrasinghe, Yintao Lu, Guozhang Fan, Xinyuan Wei, Long Jin, Jian Yin, Haozhe Ma, Lushan Jiang
Summary: This study investigates the Tanintharyi passive continental margin in the Andaman Sea and reveals the potential of the Oligocene/Early Miocene carbonate platform in the region as a significant hydrocarbon reservoir. It also examines the influence of changes in sedimentary facies and the tectonic setting of the Andaman Sea on the evolution of pockmarks.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Anastasios Nikitas, Georgios Makrodimitras, Maria V. Triantaphyllou, Nikolaos Pasadakis, Kimon Christanis, Stavros Kalaitzidis, Grigoris Rousakis, Ioannis Panagiotopoulos, Alexandra Gogou, Alexandros Papadopoulos, Efthimios Tartaras, Aristofanis Stefatos
Summary: Due to the lack of deep wells in the broader region, studying mud volcanic deposits can improve the geological understanding of the Mediterranean Ridge. In this study, biostratigraphic and geochemical analyses were performed on mud breccia deposits from five Mud Volcanoes in the central MR. The results indicate the origin of these deposits and provide insights into the source rock potential. Seismic data is also used to determine the distribution of major lithostratigraphic formations.
MARINE AND PETROLEUM GEOLOGY
(2024)