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Computed Laminography for the study of biogenic structures in sediment cores: A step between two- and three-dimensional imaging Mar. Geol. (IF 2.9) Pub Date : 2024-03-12 Javier Dorador, Francisco J. Rodríguez-Tovar, Miros S.J. Charidemou, Olmo Miguez-Salas
The study of trace fossils —ecological indicators of environmental parameters such as organic-matter content, oxygenation or sedimentation rate, among others— is a powerful tool for analysing cores from deep-sea sediment. However, the visualization of biogenic structures in soft sediment cores is commonly poor. This problem has usually been solved by using X-ray radiographs from core slabs, and later
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Spatiotemporal variability of suspended sediment concentration in the coastal waters of Yellow River Delta: Driving mechanism and geomorphic implications Mar. Geol. (IF 2.9) Pub Date : 2024-03-12 Hongyu Ji, Shenliang Chen, Peng Li, Shunqi Pan, Xuelei Gong, Chao Jiang
Satellite images have revealed a significant decline in the suspended sediment concentration (SSC) near surface in the coastal waters of Yellow River Delta (YRD) in recent years. However, there is limited information on the spatial disparity in SSC distributions and its dynamic mechanism. In this study, we utilize a well-calibrated SSC retrieval algorithm and a depth-averaged numerical modeling approach
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The Safi boulders (Morocco): Evidence of past extreme wave events Mar. Geol. (IF 2.9) Pub Date : 2024-03-09 Otmane Khalfaoui, Imane Joudar, Nouhaila Erraji Chahid, Khalid El Khalidi, Abdenaim Minoubi, Mohammed Bouchkara, Bendahhou Zourarah
Tsunamis and storm surges are among several hazards threatening the Atlantic coast of Morocco. During the last two decades, sedimentological deposits left by these events, in the form of fine-grained sediments (washover) and boulders, have been studied along the Moroccan shores to determine the return period of these events and how they fluctuate in terms of intensity. The present work investigates
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Sedimentary evolution of the Nakdong River deposits on the Korea Strait shelf since the Last Glacial Maximum Mar. Geol. (IF 2.9) Pub Date : 2024-03-08 Dong-Lim Choi, Byung-Cheol Kum, Dong-Hyeok Shin, Seok Jang
We investigated the development of depositional systems and the evolution of the depositional sequence in the Korea Strait shelf deposits since the Last Glacial Maximum (LGM), integrating a dense grid of seismic data and multiple long-core datasets from the delta plain to offshore. This depositional sequence includes the lowstand systems tract (LST), transgressive systems tract (TST), and highstand
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High-resolution wave modeling of the Southwestern Nigerian coastal shelf: Implications on geomorphic contrasts between barrier-lagoon and mud coasts Mar. Geol. (IF 2.9) Pub Date : 2024-03-06 Rasheed B. Adesina, Zhiguo He, Hafeez O. Oladejo, Olusegun A. Dada, Hameed J. Ajibade
This study characterizes the spatio-temporal wave variability along Southwestern Nigerian coastal and shelf areas in the Gulf of Guinea. This is to provide further insight into the hydrodynamic factors that influence geomorphologic changes on the low-lying coast. Reanalysis wind-field datasets are employed to generate hourly wind forcing for an unstructured WAVEWATCH III model to simulate some bulk
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Seismic stratigraphic and sedimentary record of a partial carbonate platform drowning, Queensland Plateau, north-east Australia Mar. Geol. (IF 2.9) Pub Date : 2024-03-05 Christian Betzler, Christian Hübscher, Sebastian Lindhorst, Thomas Lüdmann, Carola Hincke, Robin J. Beaman, Jody M. Webster
Tropical carbonate platforms are edifices built by shallow-water, carbonate-producing organisms. Prolonged suppression or shutdown of tropical shallow-water carbonate factories may result in partial or complete platform demise. Factors triggering the drowning process can relate to rates of accommodation increase exceeding carbonate accumulation and/or the establishment of ecological conditions not
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A non-invasive, low-cost and easy-to-operate underwater terrain monitoring method Mar. Geol. (IF 2.9) Pub Date : 2024-03-02 Xiangang Jiang, Haiguang Cheng, Diyin Kang, Xianbin Huang, Xingrong Liu, Hongyan Deng, Xueming Wu, Jianhua Dong
A fast, reliable, through water and non-intrusive bed-profile measurement technique that is economical and easy to use in a wide range of laboratory experiments involving sediment transport is proposed. A consumer-grade 3-D range sensing technology which by its low cost, easy operation and relatively good accuracy is becoming an attractive alternative to expensive 3-D laser scanners. The Microsoft
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X-ray tomography applied to tsunami deposits: Optimized image processing and quantitative analysis of particle size, particle shape, and sedimentary fabric in 3D Mar. Geol. (IF 2.9) Pub Date : 2024-03-02 Saptarshee Mitra, Raphaël Paris, Laurent Bernard, Rémi Abbal, Pascal Charrier, Simon Falvard, Pedro Costa, César Andrade
The analysis of particle size, shape, size, and their spatial arrangement (i.e. fabric) in a sedimentary deposit plays a significant role in their interpretation in terms of transport mechanism, flow conditions, and sediment source. The present work focuses on the use of X-ray computed tomography (X-CT) to analyze tsunami deposits (core samples), as examples of complex sedimentary assemblages. A workflow
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Manganese diagenesis in different geochemical environments of the ria de Vigo (Galicia, NW IBERIAN Peninsula) Mar. Geol. (IF 2.9) Pub Date : 2024-03-01 X.L. Otero, A.M. Ramírez-Pérez, M. Abernathy, S.C. Ying, H.M. Queiroz, T.O. Ferreira, M.A. Huerta-Díaz, E. de Blas
Manganese is one of the most abundant elements in marine sediments and plays an essential role in sediment redox processes. However, unlike Fe or S, the Mn cycle has not received the same attention. Mn is a ubiquitous redox-active metal in marine systems; however, its influence on C and S cycling is still poorly understood. In particular, we hypothesize that conditions that favor high HS production
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Refinement of microplate boundaries assisted by integrated gravity analysis: Application to the Caribbean Sea Mar. Geol. (IF 2.9) Pub Date : 2024-03-01 Jie Liu, Sanzhong Li, Xianzhi Cao, Yanhui Suo, Suhua Jiang, Junjiang Zhu
Under the long-term influence of subduction, collision and strike-slip faults, the Caribbean Sea and its surroundings have evolved complex topography and terranes, making it an excellent site to study the tectonic of microplates. However, some microplate boundaries of this area are still controversial or unclear. Here we employed the widely-used satellite-derived gravity dataset in combination with
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Geomorphological analysis of grounding-zone wedges reveals glacial retreat processes on the Labrador Shelf Mar. Geol. (IF 2.9) Pub Date : 2024-02-24 Kai-Frederik Lenz, Felix Gross, Henriette Kolling, Arne Lohrberg, Pierre-Olivier Couette, Christian Ohlendorf, Ralph Schneider, Sebastian Krastel, A. Catalina Gebhardt
Newly acquired high-resolution geophysical data from four glacial cross-shelf troughs of the Labrador Shelf, namely the Okak, Hopedale, Makkovik and Cartwright troughs, are presented in this study. These cross-shelf troughs were repeatedly excavated by the former Laurentide Ice Sheet (LIS) during past glaciations. We map and describe three previously unknown grounding-zone wedges (GZWs) from an area
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Holocene organic matter composition in relation to relative sea level stands and associated morphometric changes of a lagoonal system Mar. Geol. (IF 2.9) Pub Date : 2024-02-23 V. Carvalho, L. Gonzalez, C. Bueno, C. Segura, S.R. Bottezini, A. Leonhardt, D. Diniz, P. Dentzien-Dias, L. Perez, H. Evangelista, M.V. Licínio, H. Inda, L. Bergamino, J. Weschenfelder, E. Barboza, F. Garcia-Rodriguez
Garzón Lagoon is a temperate shallow coastal lagoon influenced by sea level variation. A study on the isotopic composition of Holocene sedimentary organic matter was performed. Although the system was subject to significant changes in sea level, leading to important changes in the lagoon morphometry during the Holocene, the composition of the organic matter was rather surprisingly constant, being dominated
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Pacific seafloor in the 40–52 Myr old portion of the Molokai to Murray corridor Mar. Geol. (IF 2.9) Pub Date : 2024-02-18 Donna K. Blackman, Sujania Talavera-Soza, Ruei-Jiun Hung, John A. Collins, Gabi Laske
A detailed study of the character of 40–52 Myr old Northeast Pacific seafloor illustrates how volcanism that occurs outside a spreading center axial zone contributes to the morphology of a region. A compilation of new and pre-existing multibeam sonar data forms the basis of our study, which lies within the spreading corridor bounded by Molokai and Murray fracture zones and does not include a major
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Characteristics of storm deposits in Wangcun Lagoon on the southern China coast during Typhoon Rammasun Mar. Geol. (IF 2.9) Pub Date : 2024-02-16 Hongshuai Qi, Min Chen, Feng Cai, Linnan Shen, Jiayu Li
Through study of the Pb, sedimentology, geochemistry, and microfossil characteristics of six core samples taken in Wangcun Lagoon on the Guangdong Province coast (China) before and after the passage of Typhoon Rammasun (2014), we determined the modern storm depositional dynamic process and its deposition characteristics. During Typhoon Rammasun, a storm deposit with thickness of 40–70 cm was formed
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Anthropogenic structure emplacement and sediment transport at King Herod's harbour, Israel: ED-μXRF (Itrax) data and foraminifer Pararotalia calcariformata as proxies of coastal development over millennia Mar. Geol. (IF 2.9) Pub Date : 2024-02-16 Riley E. Steele, Eduard G. Reinhardt, Jeremy J. Gabriel, Joe Boyce, Meghan Burchell, Andrew Kingston, Beverly Goodman-Tchernov
The construction of harbours along high energy nearshore environments, which commonly include the emplacement of hard structures both as central features (e.g., piers, jetties) as well as protective measures (e.g., wave breakers, coastal armouring), can alter coastlines in a multitude of ways. These include reconfiguring the coast's morphology, introducing or redistributing exogenous and endogenous
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Antecedent bedrock control on the sediment-starved continental shelf of south/central Namibia Mar. Geol. (IF 2.9) Pub Date : 2024-02-15 A.N. Green, W. Senna, J.A.G. Cooper, T. Heeralal, H. Labuschagne
The Namibian inner continental shelf immediately north of the Orange River delta is sediment-poor, dominated by outcrop of metamorphic basement with a scarcity of sandy cover. Using a combination of high and very-high resolution geophysical tools and drill cores, an examination of the evolution of the inner shelf stratigraphy and geomorphology shows persistent antecedent bedrock controls throughout
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Non-negligible contribution from coastal erosion to sedimentation around the archipelago: A case study of Miaodao Archipelago Mar. Geol. (IF 2.9) Pub Date : 2024-02-15 Rijun Hu, Wenkai Liu, Jingrui Li, Bo Liu, Longhai Zhu, Yanjun Yin, Jiandong Qiu, Zhaohan Yi, Jun Ye, Xiaodong Zhang
The Miaodao Archipelago, located in the southern Bohai Strait, serves as a major route for the exchange of energy and materials between the Yellow and Bohai seas and is distinguished by a complicated hydrodynamic environment and provenance. Based on the grain size and elemental data of 107 surface sediment samples from the archipelago waters, and 58 coastal erosional sediment and bedrock samples, this
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MWP-1C and reef drowning: Morphological evidence along the eastern Brazilian margin Mar. Geol. (IF 2.9) Pub Date : 2024-02-15 P.H. Cetto, A.C. Bastos, P.S. Menandro, J.M. Webster
Following the Last Glacial Maximum (LGM), the marine transgression experienced intermittent periods of accelerated sea-level rise related to melt water pulses (MWP) in polar regions, preceded by intervals of stillstands. Global stratigraphic and relict geomorphology studies have unveiled the impact of such sea-level rise variability on the formation and submergence of coastal and shallow shelf environments
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Corrigendum to “Improving blank ocean satellite data through machine learning: Case study and application in the Bohai Sea, China” [MARGO 465 (2023) 107173] Mar. Geol. (IF 2.9) Pub Date : 2024-02-15 Zhaoying Li, Naishuang Bi, Kunpeng Sun, Houjie Wang
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Evaluating the stabilities of common power-law models for describing particle size distributions across the continental shelf of the northern South China Sea Mar. Geol. (IF 2.9) Pub Date : 2024-02-13 Wendi Zheng, Shilin Tang, Ping Shi, Wenxi Cao, Wen Zhou
The accurate initial background of the high heterogeneity of particle size distributions (PSDs) is crucial for modeling the carbon cycle across the continental shelf. However, the lack of field measurements and constraints on PSDs has made this task challenging. In particular, different power-law models have been used to fit field PSDs, which can introduce bias in the calculated PSD slopes (s) and
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East Barents Megabasin: Tectonostratigraphy and main epochs of geological history Mar. Geol. (IF 2.9) Pub Date : 2024-02-10 Ksenia F. Aleshina, Anatoly M. Nikishin, Nikolay A. Malyshev, Jan I. Faleide
The East Barents Megabasin (EBM) is a system of sedimentary basins in the Russian sector of the Barents Sea. A large amount of new seismic data has been acquired in this region within recent years. In this work the evolution of the EBM is reconstructed based on new seismic data interpretation integrated with well data and data on major tectonic events on adjacent lands. Development of the EBM started
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Early diagenetic control on the enrichment and mobilization of rare earth elements and transition metals in buried ferromanganese crust Mar. Geol. (IF 2.9) Pub Date : 2024-02-07 Yinan Deng, Ganglan Zhang, Bin Zhao, Gaowen He, Jiangbo Ren, Weilin Ma, Limin Zhang, Yong Yang, Qing Chen, Kehong Yang
Ferromanganese crusts on seamounts represent a major reservoir of various critical metal elements (e.g., rare earth elements and transition metals) and hold substantial economic value. However, current research primarily focuses on crusts that are exposed to seawater, and little is known about the resource potential of buried crusts in sediments and the impact of early diagenesis on buried crusts.
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Introduction: Special issue on bottom currents and contourites: Processes, products and impact Mar. Geol. (IF 2.9) Pub Date : 2024-02-05 Uisdean Nicholson, Dorrik A.V. Stow, Rachel E. Brackenridge, Elda Miramontes, Anna Wåhlin
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Seismic geomorphological analysis of submarine fan architecture in the Baiyun Sag, Pearl River Mouth Basin: Impact of second-order relative sea-level change Mar. Geol. (IF 2.9) Pub Date : 2024-02-03 Jiahao Wang, Xiong Pang, Hua Wang, Zhongtao Zhang, Baojun Liu, Andrew D. La Croix
Whereas the effects of high-order relative sea level change (3rd-order and higher) on the formation and architecture of submarine fan systems are relatively well established, a lack of large-scale spatial and temporal data has resulted in the impacts of low-order relative sea level change (, 2nd-order) eluding characterization. With the aim of revealing the impacts of 2nd-order relative sea level,
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Numerical analysis of the dynamic gas hydrate system and multiple BSRs in the Danube paleo-delta, Black Sea Mar. Geol. (IF 2.9) Pub Date : 2024-02-01 Shubhangi Gupta, Christian Deusner, Ewa Burwicz-Galerne, Matthias Haeckel
The gas hydrate stability zone (GHSZ) is defined by pressure-temperature-salinity (pTS) constraints of natural gas hydrate (GH) system. It refers to a depth interval which usually extends several hundred meters into the sediment column at sufficient water depths. The lower boundary of the GHSZ often coincides in seismic reflection data with a bottom simulating reflector (BSR), which indicates the transition
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Archive for the East Australian Current: carbonate contourite depositional system on the Marion Plateau, Northeast Australia Mar. Geol. (IF 2.9) Pub Date : 2024-01-24 Sara Bashah, Gregor P. Eberli, Flavio S. Anselmetti
The modern East Australian Current (EAC) sweeps across the Marion Plateau, forming a widespread contourite depositional system. The history of the EAC is recorded in the contourite drifts that have evolved through time as topographic, sea level, and oceanographic changes have influenced the current flow. During the Miocene, five isolated carbonate platforms on the Marion Plateau formed obstacles for
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Impact of tidal shear fronts on terrigenous sediment transport in the Yellow River Mouth: Observations and a synthesis Mar. Geol. (IF 2.9) Pub Date : 2024-01-24 Nan Wang, Kang Li, Dehai Song, Naishuang Bi, Xianwen Bao, Shengkang Liang, Guangxue Li
A tidal shear front (TSF) can be defined as an obvious horizontal gradient of flow velocity formed by opposing tidal currents (reversed TSF) or same-direction tidal currents (homogenous TSF) on both sides of the front with limited impact by river runoff. Observational and modeling studies have been conducted to investigate the impact of a reversed TSF on the transport of freshwater and sediment in
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Near seafloor methane flux in the world's largest human-induced dead zone is regulated by sediment accumulation rate Mar. Geol. (IF 2.9) Pub Date : 2024-01-18 M. Ketzer, C. Stranne, M. Rahmati-Abkenar, S. Shahabi-Ghahfarokhi, L. Jaeger, M.A.G. Pivel, S. Josefsson, L. Zillén
The vast oxygen-depleted area of the central Baltic Sea is the largest human-induced dead zone in the world with 70,000 km2 or approximately three times the second largest one in the Gulf of Mexico. Methane occurs in high concentrations in bottom waters (3200 nM) and sediments (30 mM), and its dynamics is better constrained for the water column, but still poorly understood on sediments. Here we show
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Typhoon Chan-Hom (2015) induced sediment cross-shore transport in the mud depo-center of the East China Sea inner shelf Mar. Geol. (IF 2.9) Pub Date : 2024-01-23 Yunpeng Lin, Yunhai Li, Meng Liu, Liang Wang, Binxin Zheng, Zouxia Long, Jingping Xu
The erosion, transport, and deposition processes of sediments that are influenced by typhoons are significant constituents of the sedimentary source-sink processes in marginal seas. Nevertheless, the genesis of storm deposit layers in the continental shelf and their subsequent development and preservation after typhoons have not been comprehensively investigated. In this study, we have conducted a
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Sedimentation processes and morphological changes in a dredge pit and surrounding environment on Ship Shoal in the northern Gulf of Mexico Mar. Geol. (IF 2.9) Pub Date : 2024-01-19 Adam Gartelman, Kehui Xu, Kanchan Maiti, Haoran Liu, Kelli Moran, Carol Wilson, Brian J. Roberts, James Nelson
The use of dredged material from continental shelves and estuaries for degraded barrier islands has become a common practice worldwide. South Pelto block on eastern Ship Shoal (SS) has been dredged for high-quality sand resources, including Caminada Dredge Pit (CDP) and multiple pits in East Timbalier borrow areas (ET) adjacent to CDP. To understand how these dredge pits change and sediments infill
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Surface sediment erosion characteristics and influencing factors in the subaqueous delta of the abandoned Yellow River Estuary Mar. Geol. (IF 2.9) Pub Date : 2024-01-18 Chaoran Lin, Rui Bao, Longhai Zhu, Rijun Hu, Jinlong Ji, Shilei Yu
Estuarine deltas play a critical role in the interaction between the ocean and land and serve as the primary location for the deposition of terrestrial organic carbon and pollutants. However, many deltas are increasingly at risk of erosion due to natural processes and human activities. In particular, abandoned estuarine deltas are extremely prone to erosion in the absence of sediment replenishment
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Glacial-Holocene variability in sediment accumulation and erosion along submarine blind canyons: A case study from Eastern Mediterranean Sea Mar. Geol. (IF 2.9) Pub Date : 2024-01-14 Naomi Moshe, Oded Katz, Adi Torfstein, Mor Kanari, Pere Masque, Orit Hyams-Kaphzan
Submarine canyons serve as important sediment transport conduits from littoral zones to the deep sea, with strong impacts on the sedimentation patterns in marginal areas of the ocean. Moreover, such canyons can be major geohazards for submarine infrastructure, warranting a good understanding of their past and current behavior.
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Facies-neoichnological variability and sedimentation rates of modern continental shelves Mar. Geol. (IF 2.9) Pub Date : 2024-01-04 Sunny C. Ezeh, Angelina A. Abi Daoud, Ignacio D. Cabrera, Mackenzie Mailhot, Janok P. Bhattacharya, John P. Walsh, D. Reide Corbett
Current ichnofacies models for shelf environments are largely based on analysis of ancient sedimentary deposits and have rarely been applied to studies of modern siliciclastic shelves. Siliciclastic shelf margins are key components of source rocks and unconventional shale plays that can be used as modern analogs to ancient systems. This paper examines the sedimentology and ichnology of shelf margin
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Dynamic evolution of gas hydrate systems affected by magmatism and Quaternary mass-transport deposits in the Qiongdongnan Basin, South China Sea, and implications for the global carbon cycle Mar. Geol. (IF 2.9) Pub Date : 2023-12-23 Hao Du, Wanzhong Shi, Ren Wang, Vittorio Maselli, Jinqiang Liang, Jinfeng Ren, Zengui Kuang, Yulin He, Litao Xu, Tingna Zuo
Methane release from hydrate systems has long been considered as one of the important mechanisms for global carbon cycle perturbations and ocean acidification. Here, a Quaternary active gas hydrate system in Qiongdongnan Basin, South China Sea (SCS), has been analyzed by using seismic, logging while drilling (LWD), and core data. The results show that post-rift magmatism led to the reactivation of
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Changes in rock magnetic properties of sediments along the Carlsberg Ridge: Inferences on active/extinct vent fields Mar. Geol. (IF 2.9) Pub Date : 2023-12-23 Sambhabana Lenka, Pratima M. Kessarkar, Lina L. Fernandes, Concy Gomes
Hydrothermal vents at Mid Ocean Ridges (MOR) are known to leave metalliferous, bacterial, temperature-induced signatures in sediments. Knowledge of active/extinct vents along the Carlsberg Ridge (CR) is sparse; further conventional methods to distinguish relevant areas are tedious/expensive. We show that basic rock magnetic measurements, including magnetic susceptibility and laboratory-induced remanent
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Sediment leakage on the beach and upper shoreface due to extreme storms Mar. Geol. (IF 2.9) Pub Date : 2023-12-22 Jorge Guillén, Gonzalo Simarro, Daniel Calvete, Francesca Ribas, Angels Fernández-Mora, Alejandro Orfila, Albert Falqués, Rinse de Swart, Amanda Sancho-García, Ruth Durán
The quantification of sediment exchanges between the beach and the lower shoreface, although being still poorly understood, is required to adequately forecast long-term coastal evolution. The effect of extreme storms on the morphodynamics of the nearshore and the sediment budget of the coastal zone seems to be strongly conditioned by local parameters, which should be incorporated into studies of medium-
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Submarine landslides on the Eastern South Korea Plateau (ESKP)—Do pumice-rich tephra layers control slope stability? Mar. Geol. (IF 2.9) Pub Date : 2023-12-20 Deniz Cukur, In-Kwon Um, David M. Buchs, Seong-Pil Kim, Gee-Soo Kong, Jong-Hwa Chun, Senay Horozal, Seok-Hwi Hong, Shin Yu, Tae-Yeon Kim
Tephra layers embedded in marine sediments can be significant in controlling submarine landslide dynamics and seafloor morphology, but their preconditioning effects on slope failure remain uncertain. Here, we study the morphology and preconditioning factors of submarine landslides from a volcanically active region, the Eastern South Korea Plateau (ESKP) using a recently acquired multibeam echosounder
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Depositional characteristics of fine-grained sedimentary rocks and the links to OAE-3 and PETM of the Upper Cretaceous-Paleogene Madingo Formation, lower Congo Basin, West Africa Mar. Geol. (IF 2.9) Pub Date : 2023-12-15 Zhiwei Zeng, Hongtao Zhu, Xianghua Yang, Shaocong Ji, Zhu Zhang, Xing Huang
Fine-grained sedimentary rocks of the Madingo Formation in the Lower Congo Basin (LCB), are significant targets for Upper Cretaceous–Paleogene depositional system analysis in West Africa. Six types of fine-grained sedimentary rocks of the Madingo Formation were identified based on integrated analyses of petrographic characteristics, geochemical element analysis and electron back-scattered diffraction
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Assessing shoreface sediment transport at Costinha beach, Aveiro, Portuguese Northwest coast Mar. Geol. (IF 2.9) Pub Date : 2023-12-09 Soraia Romão, Paulo A. Silva, Rui Taborda, João Cascalho, Ana Nobre Silva, Paulo Baptista
Coastal zones are dynamic environments where sediment transport significantly influences erosion, deposition, and ecosystem stability. Accurate modelling of the complex interactions between hydrodynamics, sediment transport, and morphological changes in high-energy shoreface areas is crucial for sustainable coastal management. This study aims to assess sediment dynamics and understand the dominant
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Sulfur isotopes as a new indicator for the maturation of sulfide chimneys in submarine hydrothermal systems Mar. Geol. (IF 2.9) Pub Date : 2023-12-08 Xingwei Meng, Xiaohu Li, Astrid Holzheid, Basem Zoheir, Xianglong Jin, Zhenggang Li, Hao Wang, Zhimin Zhu, Jie Li, Jianru Zhao, Fengyou Chu
Understanding the relationship between sulfide chimney maturity and fluid evolution in submarine hydrothermal systems is essential for deciphering mineralogical changes, sulfur dynamics, and fluid flux over time. We investigate this link through sulfur isotopic analysis of sulfides from three maturity stages of sulfide chimneys at the Niaochao hydrothermal field (East Pacific Rise, 1–2°S), integrated
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Identification of sandy nourished sediments using end-member analysis (EMMAgeo) applied to particle shapes distributions, Sylt Island, North Sea Mar. Geol. (IF 2.9) Pub Date : 2023-12-07 Damian Moskalewicz, Christian Winter
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Long-term accretion rates in UK salt marshes derived from elevation difference between natural and reclaimed marshes Mar. Geol. (IF 2.9) Pub Date : 2023-12-07 Gerd Masselink, Robert B. Jones
The future of salt marshes depends in a large part on the balance between the future rate of marsh accretion and the future rate of sea-level rise (SLR). Current accretion rates can provide some insight into future resilience of salt marshes to SLR, but representative long-term rates across the complete salt marsh area are difficult to obtain. Here, we introduce a new method based on the elevation
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A ∼200-year relative sea-level reconstruction from the Wellington region (New Zealand) reveals insights into vertical land movement trends Mar. Geol. (IF 2.9) Pub Date : 2023-12-07 Daniel J. King, Rewi M. Newnham, Andrew B.H. Rees, Kate J. Clark, Ed Garrett, W. Roland Gehrels, Timothy R. Naish, Richard H. Levy
The sea-level rise threat to New Zealand's coastal cities is regionally exacerbated due to spatially varying vertical land movement (VLM). At Wellington, the capital city, situated adjacent to a major active plate boundary, strong regional spatial and temporal variability of VLM is indicated by the relatively short (∼25 year-long) continuous Global Navigation Satellite Systems (GNSS) network, but until
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The discovery of the southernmost ultra-high-resolution Holocene paleoclimate sedimentary record in Antarctica Mar. Geol. (IF 2.9) Pub Date : 2023-12-04 Francesca Battaglia, Laura De Santis, Luca Baradello, Ester Colizza, Michele Rebesco, Vedrana Kovacevic, Laura Ursella, Manuel Bensi, Daniela Accettella, Danilo Morelli, Nicola Corradi, Pierpaolo Falco, Naomi Krauzig, Florence Colleoni, Emiliano Gordini, Andrea Caburlotto, Leonardo Langone, Furio Finocchiaro
The response of the Antarctic ice sheet to climate warming is the main source of uncertainty regarding future global sea level rise, since little is known about its present and past dynamics. The last deglaciation is the most recent interval of large-scale climate warming, during which the Northern and Southern Hemisphere ice sheets retreated, and sea level rose globally, although at a non-uniform
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Geochemistry of buried polymetallic nodules from the eastern Pacific Ocean: Implication for the depth-controlled alteration process Mar. Geol. (IF 2.9) Pub Date : 2023-12-02 Kehong Yang, Yanhui Dong, Zhenggang Li, Hao Wang, Weilin Ma, Zhongrong Qiu, Xiaohu Li, Chunhua Han, Jianru Zhao
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The infill of tunnel valleys in the central North Sea: Implications for sedimentary processes, geohazards, and ice-sheet dynamics Mar. Geol. (IF 2.9) Pub Date : 2023-11-25 James D. Kirkham, Kelly A. Hogan, Robert D. Larter, Ed Self, Ken Games, Mads Huuse, Margaret A. Stewart, Dag Ottesen, Daniel P. Le Heron, Alex Lawrence, Ian Kane, Neil S. Arnold, Julian A. Dowdeswell
Tunnel valleys are widespread in formerly glaciated regions such as the North Sea and record sediment transport beneath ice sheets undergoing deglaciation. However, their complex infill architecture often makes their implications for ice-sheet processes difficult to unravel. Here, we use high resolution 3D (HR3D) seismic-reflection data, improved-resolution conventional 3D seismic-reflection data,
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Ecological and sediment dynamics response to typhoons passing from the east and west sides of the Changjiang (Yangtze River) Estuary and its adjacent sea area Mar. Geol. (IF 2.9) Pub Date : 2023-11-25 Wenjian Li, Zhenyan Wang, Guan-hong Lee, Haijun Huang
The hydrodynamic environment of the Changjiang (Yangtze River) Estuary and its adjacent sea area frequently experiences the influence of typhoon activities during the summer season. However, the differences in responses to typhoons with different trajectories are still poorly understood. Using buoy observations with synchronous satellite images, we investigated the sediment dynamics response to Typhoon
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Geochemical and sedimentary features of the unusual association between hybrid carbonates and beachrocks in the Southeastern Brazilian Coast Mar. Geol. (IF 2.9) Pub Date : 2023-11-22 Mírian Cristina Oliveira Costa, Eveline Ellen Zambonato, Thiago Andrade Sousa, Emmanoel Vieira Silva-Filho
Rocks formed in beach environments during the Holocene constitute strong evidences of relative sea level variations (RSL) and supply important data for paleoenvironmental reconstruction. At the southeastern Brazilian coast, an unusual association of lithofacies composed of hybrid carbonates and beachrocks was identified on the Parati beach in the Espírito Santo state. In this study, radiocarbon dating
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Late Cretaceous erosion and chemical weathering record in the offshore Cape Basin: Source-to-sink system from HfNd isotopes and clay mineralogy Mar. Geol. (IF 2.9) Pub Date : 2023-11-22 Camilo E. Gaitan, Emmanuelle Pucéat, Pierre Pellenard, Justine Blondet, Germain Bayon, Thierry Adatte, Claudine Israel, Cécile Robin, François Guillocheau
Source-to-sink research has often used sediment fluxes as a fundamental parameter when seeking to understand the perturbations caused by tectonics or climate. This parameter is often interpreted only in terms of erosion rates, dismissing the component exerted by chemical weathering. In this study, we characterize sediments from the Deep Surface Drilling Program core 361 (DSDP 361) located in the Cape
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Sea level controls on the provenance of fine-grained sediments in the Xisha Trough, northwestern South China Sea over the last ∼30 ka Mar. Geol. (IF 2.9) Pub Date : 2023-11-20 Qiang Zhang, George E.A. Swann, Jianguo Liu, Weijian Gao, Zhenang Cui, Gang Li, Xuan Zhao, Wei Li
The Xisha Trough situated in the northwestern South China Sea (SCS), plays a pivotal role in transporting sediments from the Red River into the deep-sea basin of the SCS, and thus is a critical place to examine variations in source-to-sink process of the Red River-derived sediments associated with past climate and oceanography changes. In this study, we analyzed clay minerals, grain size composition
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Mid-Holocene salinity intrusion and rice yield loss on East China coast and the impacts on formation of a complex state society Mar. Geol. (IF 2.9) Pub Date : 2023-11-11 Yufen Chen, Shao Lei, Michael Lazar, Ehud Arkin Shalev, Zhanghua Wang(王张华)
The East China coast is a significant center of Neolithic culture. However, the drivers for the formation of prehistoric Liangzhu State, which emerged at ca. 5300 cal. yr BP and is considered the earliest example in China of a complex state society, have yet to be discerned. This study presents multi-proxy analyses of chronology, sedimentology, organic and alkaline-earth metal geochemistry, diatoms
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Metallogenetic process of Xunmei hydrothermal field (26°S), South Mid-Atlantic Ridge: Constraints from in-situ sulfur isotope and trace elements of sulfides Mar. Geol. (IF 2.9) Pub Date : 2023-11-09 Yuan Dang, Chuanshun Li, Xuefa Shi, Sai Wang, Jun Ye, Bing Li, Yue Yang, Qiukui Zhao, Yili Guan, Jingwen Mao
Seafloor hydrothermal sulfides at slow-spreading mid-ocean ridges (MORs) are of economic and scientific significance. The formation of newly discovered submarine hydrothermal sulfides on the South Mid-Atlantic Ridge (SMAR), particularly with respect to the fluid evolution, remains poorly understood. The Xunmei hydrothermal field is a typical volcanic dome-type hydrothermal field at 26°S on the SMAR
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Rice farming practices and their responses to environmental changes during the mid-Holocene on the Ningshao Plain, eastern China Mar. Geol. (IF 2.9) Pub Date : 2023-10-30 Haiyan Li, Jue Sun, Jia Sun, Yongning Li, Fengya Ding, Dongsheng Zhao, Zhenhui Huang, Chunmei Ma
The cultivation of rice, which serves as a dietary staple for more than half of the global population, exerts a profound impact on both the national economy and people's livelihood. However, there remains a lack of clarity regarding the developmental stages of rice agriculture and its response to environmental change. Here, we present a multi-proxy analysis encompassing pollen, phytolith, grain size
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Turbulence and fine sediment dynamics in a benthic boundary layer in Fujian Coastal Sea, SE China Mar. Geol. (IF 2.9) Pub Date : 2023-10-20 Junbiao Tu, Daidu Fan
A short-term (∼ 25 h) intensive field observation focused on flow, turbulence, suspended sediment concentration, and floc/particle size distributions was conducted in a coastal benthic boundary layer to understand flocculation and erosion/deposition processes of fine sediment. Observations showed suspended particles were mainly flocculated into the size range of microflocs (50-200 μm). Macroflocs (>
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Contribution of local erosion enhanced by winds to sediment transport in intertidal flat Mar. Geol. (IF 2.9) Pub Date : 2023-10-20 Sun Min Choi, Jun Young Seo, Ho Kyung Ha
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Early–mid Holocene relative sea-level rise in the Yangtze River Delta, China Mar. Geol. (IF 2.9) Pub Date : 2023-10-20 Yu Cheng, Shiyin Xu, Ding Luo, Bingfei Gao, Mingjun Zhu, Xinqing Zou
Regional-scale Holocene sea-level reconstruction is the key to understanding natural climatic variability. The tidal flat, salt marsh, and tidal floodplain in the Yangtze River Delta were very sensitive to morphological changes and sea-level variation during the early Holocene. In this study, the lithology, radiocarbon ages, sediment grain size, benthic foraminifera, and ostracods of three new cores
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Salt-wedge intrusion-retreat cycle induced sediment floc dynamics in bottom boundary layer (BBL) of a micro-tidal estuary Mar. Geol. (IF 2.9) Pub Date : 2023-10-24 Huan Liu, Leiping Ye, Wenjue Zhou, Jiaxue Wu
Suspended sediment floc dynamics, particularly in the bottom boundary layer (BBL), has long been recognized as a complex and crucial factor influencing flow hydrodynamic and bed morphodynamics in tidal estuarine regions. Periodic salt-water intrusion in micro-tidal estuaries plays a crucial role due to its direct impacts on ecosystem, biological habitats, and human activities. To gain deeper understanding
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Improving blank ocean satellite data through machine learning: Case study and application in the Bohai Sea, China Mar. Geol. (IF 2.9) Pub Date : 2023-10-20 Zhaoying Li, Naishuang Bi, Kunpeng Sun, Houjie Wang
Ocean satellites provide accurate and precise data across various scales, making them a vital tool for investigating the association between global change and ocean processes. However, low-quality data creates unavoidable gaps in satellite data, diminishing its usefulness and continuity. These deficiencies can be resolved by implementing machine learning techniques as valuable tools. This paper details
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Carbonate sediment dynamics in the Abu Dhabi lagoon - implications for low-angle inner-to-middle ramp models Mar. Geol. (IF 2.9) Pub Date : 2023-10-20 Yisi Zhong, Stephen W. Lokier, Chelsea L. Pederson, Flavia Fiorini, Dominik Hennhoefer, Yuzhu Ge, Adrian Immenhauser
Carbonate ramps are prominent features of continental margins and intrashelf basins throughout much of Earth's history. Among the limited number of recent analogues of ancient carbonate ramps, the Persian/Arabian Gulf stands out due to its morphologically complex array of open coastal to sabkha environments. This study presents detailed field and laboratory data on spatial facies variability linked