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Sedimentary characteristics of mixed source fine-grained gravity-flow and its significance for shale oil exploration in a lacustrine depression basin: A case study of Chang 73 Sub-member of Triassic Yanchang Formation in Ordos Basin, NW China Sediment. Geol. (IF 2.8) Pub Date : 2024-03-14 Lin Wang, Qiqi Lyu, Linhan Li, Jun Liu, Shunshe Luo, Xuehu Sun, Lei Zhang, Xinshou Xu
This study investigates the transport and evolution of fine-grained gravity-flow deposits in lacustrine basins, focusing on the relationship between fine-grained deposits and their respective source-reservoir combinations. Such knowledge is vital for the exploration and development of unconventional oil and gas resources within the source-rock series of continental lake basins in China. We investigated
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Organic matter accumulation in response to tectonism: New data from the Upper Permian Dalong Formation black shales in the Western Hubei Basin, South China and its implications for the end-Permian mass extinction Sediment. Geol. (IF 2.8) Pub Date : 2024-03-11 Binsong Zheng, Chuanlong Mou, Yuanchong Wang
Redox conditions and primary productivity are proposed to be the major controls of organic matter accumulation in sediments. Studies on the impacts of tectonic processes on it are still limited. We took the Late Permian - Early Triassic Western Hubei Basin located in the north of the South China as an example. In black shales in the Dalong Formation, bottom water redox conditions and surface water
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Seismic stratigraphy and sediment cores reveal lake-level fluctuations in Lake Iznik (NW Turkey) over the past ~70 ka Sediment. Geol. (IF 2.8) Pub Date : 2024-03-11 R. Gastineau, F.S. Anselmetti, S.C. Fabbri, P. Sabatier, P. Roeser, S. Gündüz, M. Şahin, E. Duarte, W. Rapuc, A.C. Gebhardt, S.O. Franz, F. Niessen, J. de Sigoyer
Our study aims to understand the palaeohydrological history of Lake Iznik and unravel the complex interplay between climatic, tectonic, and environmental factors that have shaped this Turkish basin. Through the analysis of seismic stratigraphy and sediment cores, we reveal a significant lowstand, indicating a lake level 60 m lower than today at ~70 ka BP. Subsequently, a major phase of stepwise transgression
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Miocene evolution of the External Rif Zone (Morocco): Comparison with similar and lateral southern Mediterranean Tethyan margins Sediment. Geol. (IF 2.8) Pub Date : 2024-03-08 Manuel Martín-Martín, Francesco Guerrera, Juan Carlos Cañaveras, Francisco Javier Alcalá, Francisco Serrano, Alí Maaté, Rachid Hlila, Soufian Maaté, Antonio Sánchez-Navas, Crina Miclăus, José Enrique Tent-Manclús, Manuel Bullejos
The Miocene evolution of the External Rif Zone (NW Africa Plate) was determined through the multidisciplinary analysis of fourteen successions. The updated stratigraphic framework shows how Miocene sediments rest on the Cretaceous–Paleogene terrains through unconformity surfaces, whereas it rests with sedimentary continuity in two sectors. After recognition of lithofacies and three unconformities located
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A Cretaceous siliceous sinter in NE China: Sedimentological and geochemical constraints on its genesis Sediment. Geol. (IF 2.8) Pub Date : 2024-03-06 Yaxian You, Huaguo Wen, Lianchao Luo, Kathleen A. Campbell, Diego M. Guido, Enrico Capezzuoli, Zhipeng Lu, Lei Du, Yunbao Yang
Phanerozoic sinter deposits have been reported globally, with their identification mainly based on sedimentological, petrological, and mineralogical studies. In this study, a detailed geochemical investigation, combined with sedimentological characterization, was conducted on the Wugonglilu siliceous deposit, a Cretaceous (106 Ma) sinter in NE China, to examine its genesis. The deposit is inferred
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Overcoming inter-dataset discrepancies in the grain size distributions of fine-grained sediments by partial least squares regression: A case study of the Belgian Boom Formation Sediment. Geol. (IF 2.8) Pub Date : 2024-03-02 Lander Frederickx, Gert Jan Weltje, Miroslav Honty, Mieke De Craen, Reiner Dohrmann, Elke Jacops, Jan Elsen
The grain size distribution is an important property of all clastic sediments: it determines their mechanical properties and is directly related to their mode of transport and origin. Therefore, the accurate measurement and comparability of grain size data are important. The former has been studied in detail in literature and has been demonstrated to be significantly instrument-dependent, while the
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Particle size analysis: A comparison of laboratory-based techniques and their application to geoscience Sediment. Geol. (IF 2.8) Pub Date : 2024-02-22 J.E. Houghton, J. Behnsen, R.A. Duller, T.E. Nichols, R.H. Worden
In sedimentary geoscience, the particle size distribution (PSD) of a sediment has a fundamental effect on a sediment's ability to be entrained, eroded, and deposited. Therefore, it is crucial to accurately measure the PSD of sediments. Several laboratory-based methods of particle size analysis are commonly employed in geoscience; however, each method is based on different principles and the comparison
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Can palaeosols reveal palaeoenvironmental variability of fluvial systems? An example from the upper portion of the Bauru Group (Upper Cretaceous, SE Brazil) Sediment. Geol. (IF 2.8) Pub Date : 2024-02-20 Giorgio Basilici, Paolo Lorenzoni, Áquila Ferreira Mesquita, Juraj Janočko, Luca Colombera, Grace I.E. Cosgrove, Nigel Philip Mountney, Carlos Roberto Souza Filho, Alexandre Ribeiro Cardoso, Agustín Guillermo Martinelli, Lucas Ernesto Fiorelli, Richard Guillermo Vasconez Garcia, Thiago da Silva Marinho, André Marconato
Palaeosols are common in sedimentary successions of continental origin, and notably they comprise the majority of the thickness of some accumulated successions of fluvial origin. Yet, detailed investigation of palaeosols and evaluation of their palaeoenvironmental significance are not routinely undertaken in detail in many sedimentological studies. A careful analysis of palaeosols may, however, reveal
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INTRASEDIMENT gypsum in subtidal offshore carbonates as a witness of basin-wide evaporitic precipitation. The CASE of the southern VARISCAN foreland basin (mid-carboniferous) Sediment. Geol. (IF 2.8) Pub Date : 2024-02-20 Iván Díaz-García, Óscar Merino-Tomé, I. Emma Quijada, Juan R. Bahamonde, Luis P. Fernández, Giovanna Della Porta, Elias Samankassou, Elena Kulagina, Ángeles G. Borrego, Jaime Martín-Llaneza, José Federico Del Pozo
Widespread calcite and quartz pseudomorphs, interpreted as originally gypsum crystals, occur within calci-mudstone accumulated in subtidal offshore environments in the broad marine foreland basin developed on the southern flank of the Ouachita–Alleghanian–Variscan Orogen during mid-Carboniferous times, which acted as a marine corridor connecting the Panthalassa and Palaeo-Tethys Oceans during the Mississippian
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Redox conditions of Datangpo-type manganese ores constrained by statistical analysis of pyrite framboids and iron isotopes Sediment. Geol. (IF 2.8) Pub Date : 2024-02-18 Hongxi He, Jiafei Xiao, Haiying Yang, Linbo Yao, Chuang Yang
Datangpo-type manganese ores which originated in the Cryogenian Datangpo Formation, are overlaid and underlaid by Nantuo diamicite and Tiesi'ao silistones, respectively. A thorough understanding of the manganese mineralization process is currently limited by the continued uncertainty regarding the metallogenic redox condition of the Mn-bearing rock series. This study employed statistical analysis of
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Sedimentary differentiation caused by glaciation and orogeny during the Ordovician–Silurian transition in the southern Sichuan Basin, China Sediment. Geol. (IF 2.8) Pub Date : 2024-02-16 Zisang Huang, Zhongquan Li, Yiqing Zhu, Ruifeng Tang, Shengxian Zhao, Bo Li, Yue Li, Bo Ran
The Wufeng–Longmaxi shales, which were deposited during the Ordovician–Silurian transition in the southern Sichuan Basin, exhibit distinct lithofacies transitions. The shift from organic-rich siliceous shale to organic-poor mixed shale and argillaceous shale is attributed to the influences of the Hirnantian glaciation and the Kwangsian Orogeny. Nevertheless, debates persist regarding the mechanisms
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MISS from a temperate hypersaline saltpan under continental influence (Salitral de La Vidriera, Argentina) Sediment. Geol. (IF 2.8) Pub Date : 2024-02-15 María Florencia Yorlano, Lucía Maisano, Diana G. Cuadrado, Jerónimo Pan
The (SDV; 38°44′S, 62°34′W) once occupied the innermost section of a funnel-shaped estuary before its isolation due to sea level drop ∼3000 years BP. It currently is a continental saltpan detached from the Bahía Blanca estuary, having no marine connection, and acting as a hypersaline evaporitic environment. This study provides a first-hand characterization of the epibenthic microbial mats that biostabilize
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Physical characteristics of hydrofracture systems and their fills in glacial sediments Sediment. Geol. (IF 2.8) Pub Date : 2024-02-08 Edouard Ravier
Hydrofracture systems have been described in glacial sediments for almost a century and accelerating research since the 2000s, boosted by the advent of micromorphological techniques applied to glacial deposits, led to a significant rise of studies using paleo-hydrofractures (and their fills) as a new proxy for reconstructing glacial processes and environments. This review covers the great diversity
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Decoding the Late Palaeozoic glaciated landscape of Namibia: A photogrammetric journey Sediment. Geol. (IF 2.8) Pub Date : 2024-02-03 D.P. Le Heron, C. Kettler, P. Dietrich, N. Griffis, I.P. Montañez, R. Wohlschlägl
The geometry of unconformities carved by deep time ice sheets is often obscured and restricted by discontinuous exposure, or outcrop conditions that do not readily permit the examination of glacial unconformities (for example, steeply dipping strata). Here, we present new uncrewed aerial vehicle (UAV) data from selected outcrops across northern, central and southern Namibia to shed further light on
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Did evaporite cements and infiltrated silts assist preservation of reptile tracks in Permian desert sediments? Sediment. Geol. (IF 2.8) Pub Date : 2024-02-02 Kirsten E. Flett, Carol Hopkins, Jessica H. Pugsley, Alexander T. Brasier
Many Permian desert tracks are found in formations dominated by rather homogeneous aeolian quartz arenites. This raises questions around how they got preserved. Here we test the hypothesis that strong palaeoenvironmental controls affect style and quality of footprint preservation in Permo-Triassic desert settings. To answer this, several examples of tracks and trackways from Moray, Scotland, are described
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The Early Cretaceous hydrothermal sedimentation and its influence on sandstone-type uranium mineralization in the Xinniwusu Sag, Bayingobi Basin, NW China Sediment. Geol. (IF 2.8) Pub Date : 2024-01-24 Qinlong Tong, Mingkuan Qin, Fawang Ye
The presence of Early Cretaceous hydrothermal sedimentation was initially observed in the Xinniwusu Sag, Eastern Bayingobi Basin, NW China. To gain deeper insights into the features of hydrothermal sedimentation in this region and its relationship with uranium mineralization, we conducted an analysis encompassing petrography, geochemistry, the electron microprobe, and low-temperature thermochronology
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Stratigraphical and sedimentological controls on the distribution of Cloudina bioclastic accumulations in the terminal Ediacaran Tamengo Formation (Corumbá Group), Brazil Sediment. Geol. (IF 2.8) Pub Date : 2024-01-21 Jhon W.L. Afonso, Luiz G. Pereira, Bianca A. de Faria, Guilherme R. Romero, Kamilla B. Amorim, Juliana M.L. Basso, Ricardo I.F. Trindade
The appearance of the early biomineralized skeletons during the latest Ediacaran was one of the most important evolutionary gains for the ancient animals' lineage. This evolutionary innovation likely represents a pivotal shift in ecology and the interactions between the geosphere and biosphere. Among these fossils, stands out as the oldest macroscopic biomineralized metazoan that achieved widespread
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Holocene stratigraphic architecture of a Mediterranean delta and implication for sediment budget evolution: Example of the Rhône delta Sediment. Geol. (IF 2.8) Pub Date : 2024-01-17 Théo Martinez, Rémy Deschamps, Alessandro Amorosi, Gwenael Jouet, Claude Vella, Gabriel Ducret, Jean-François Berger
Deltaic systems evolve as a result of interactions between the hydroclimatic processes that occur in the catchment area and the coastal marine processes that reshape the coastline. The Holocene evolution of these environments is controlled by climate and anthropization, which are rarely considered in models of the evolution of deltaic systems. The Rhône delta has recorded the impact of climatic variations
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Exploring the genesis of glaucony and verdine facies for paleoenvironmental interpretation: A review Sediment. Geol. (IF 2.8) Pub Date : 2024-01-15 B. Rubio, A.E. López-Pérez
Green marine clays, known as glaucony and verdine facies, are unique iron-rich minerals typically found in shallow marine sedimentary environments covering large areas of continental shelves today. While on some occasions they have been used effectively as paleoenvironmental indicators associated with transgressive and highstand system tracts, their occurrence can vary in different sedimentary environments
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Upwelling-driven biogenic silica accumulation in the Yangtze Sea, South China during Late Ordovician to Early Silurian time: A possible link with the global climatic transitions Sediment. Geol. (IF 2.8) Pub Date : 2024-01-08 Bowen Zan, Chuanlong Mou, Gary G. Lash, Qiyu Wang, Xiuqing Wang, Daniel Paul Le Heron, Jiaxin Yan, Zhifeng Zhang, Qian Hou, Yu Xia, Shengyang Yao
Silica accumulation in the Yangtze Sea during the Ordovician–Silurian (O–S) transition appears to have coincided with global climatic fluctuations, widespread upwelling, and volcanism. There is a need to further evaluate their respective contributions to silica deposition and potential relationships among these factors. The current study selected siliceous deposits in the Wufeng and Longmaxi Formations
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The “Aniangzhai” ancient dammed lake discovered on the eastern margin of the Tibetan Plateau Sediment. Geol. (IF 2.8) Pub Date : 2024-01-07 Zhuo Wang, Qiang Xu, Fang Xiang, Yunsheng Wang, Xianguo Lang, Junling Dong, Zuobin Xie, Xuanmei Fan
Ancient dammed lake deposits, developed in tectonically active mountainous areas, record high-resolution changes in paleoclimate and paleoseismicity. This paper reports a massive ancient dammed lake, the “Aniangzhai paleolandslide-dammed lake”, newly discovered in the upper reaches of the Dadu River on the eastern margin of the Tibetan Plateau. Optically stimulated luminescence (OSL) dating showed
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Sedimentary evolution and distribution of benthic fauna of an Aptian protected bay (Oliete Subbasin, Spain) Sediment. Geol. (IF 2.8) Pub Date : 2024-01-05 A. García-Penas, M. Aurell, S. Zamora
Detailed facies and sequence stratigraphic analysis of an Aptian shallow-marine succession illustrates the evolution of sedimentary environments and their benthic faunal associations in a marginal bay developed in northeastern Iberia (Maestrazgo Basin, Oliete Subbasin). In this bay, marine circulation was hampered by wide stationary shoals located in the low-subsidence transitional areas between subbasins
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Using carbon and oxygen isotopes for global correlation in the Early Triassic Lower Mahil Formation, North Oman, despite potentially misleading diagenetic effect Sediment. Geol. (IF 2.8) Pub Date : 2024-01-05 Mohamed S.H. Moustafa, Mohamed A.K. El-Ghali, Rasha Al Raqaishi, Iftikhar Ahmed Abbasi, Arshad Ali, Aaraf Al Humaidi, Nada Al Ghafri, Rana Al-Rab'Ani, Abdulrazak Al-Sayigh, Hezam Al-Awah
The study probes into the carbon isotope curves of the Lower Triassic Mahil Formation in two sections situated in the Northern Oman Mountains. The primary objective of the research was to understand the relationship between facies and isotopes, involving the analysis of 174 micrite samples for oxygen and carbon isotopes. Strict measures were implemented during sample selection to mitigate potential
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Carbonate factory response through the MECO (Middle Eocene Climate Optimum) event: Insight from the Apulia Carbonate Platform, Gargano Promontory, Italy Sediment. Geol. (IF 2.8) Pub Date : 2024-01-05 C. Morabito, C.A. Papazzoni, D.J. Lehrmann, J.L. Payne, K. Al-Ramadan, M. Morsilli
During the Eocene, shallow-water carbonate systems were significantly impacted by climate fluctuations and hyperthermal events. Following the peak temperatures of the Early Eocene Climatic Optimum (EECO), a general cooling trend began, with short-lived (⁓200 kyr) warming events occurring alongside it. In the early Bartonian (around 40.1 Ma), a warming event known as the Middle Eocene Climatic Optimum
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Flume experiments of gravity flows: Transformation from sandy debris flows to turbidity currents with clay matrix separation Sediment. Geol. (IF 2.8) Pub Date : 2024-01-05 Jiahao Wang, Andrew D. La Croix, Hua Wang, Xiong Pang, Baojun Liu
Sandy debris flows and high-density turbidity currents are two kinds of gravity flows that have been interpreted to produce massive sandstone deposits, yet no consensus has been reached on the depositional mechanism how the deposits should be subdivided. To show differences in the deposits resulting from these two contrastive types of gravity flows, we designed flume experiments (with sand concentrations
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Abundance of trace fossil Phycosiphon incertum in core sections measured using a convolutional neural network Sediment. Geol. (IF 2.8) Pub Date : 2024-01-05 Kazuki Kikuchi, Hajime Naruse
A convolutional neural network (CNN) was used to construct a semantic segmentation model to examine the abundance of Phycosiphon incertum by identifying the trace fossil regions in core section images. The abundance of trace fossils provides information about the past activities of benthic animals affected by paleoenvironmental conditions. To quantify the intensity of bioturbation, it is necessary
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Offshore evidence of historic and prehistoric tsunamis on the north shore of Tutuila (American Samoa) Sediment. Geol. (IF 2.8) Pub Date : 2024-01-05 Brieuc Riou, Eric Chaumillon, Catherine Chagué, Sabine Schmidt, Thierry Corrège, Stéphane Bujan, Jean-Luc Schneider
Although research dealing with the geological evidence of past tsunamis has increased significantly in the last two decades, studies of tsunami deposits emplaced during the backwash phases are still underrepresented. Here, we provide the first investigation of tsunami backwash deposits all around an island (Tutuila Island, American Samoa), in the southwest of the Pacific Ring of Fire. We decipher the
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Heavy mineral indicators of ridge subduction beneath the Bainaimiao arc in the southeastern Central Asian Orogenic Belt Sediment. Geol. (IF 2.8) Pub Date : 2024-01-04 Shouxian Ma, Yingli Zhang, Dongsheng Wang, Zongqi Wang
As one of the major subduction-accretionary systems in the southeastern Central Asian Orogenic Belt, the Bainaimiao arc presents a valuable opportunity for investigating the subduction–accretion process of accretionary orogens. It is located adjacent to the northern margin of the North China Craton and developed arc-related deposits during the Silurian–Devonian period. In this paper, we employed heavy
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Corrigendum to “Sedimentological, petrophysical, and geochemical controls on deep marine unconventional tight limestone and dolostone reservoir: Insights from the Cenomanian/Turonian oceanic anoxic event 2 organic-rich sediments, southeast Constantine Basin, Algeria” [Sediment. Geol. 429 (2022) 106072] Sediment. Geol. (IF 2.8) Pub Date : 2023-12-23 Khadidja Boutaleb, Rafik Baouche, Moussa Sadaoui, Ahmed E. Radwan
Abstract not available
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Testing the record of climate-related cyclicity in microbial lamination: An example from Miocene oncolites in the Ebro Basin, Spain Sediment. Geol. (IF 2.8) Pub Date : 2023-12-22 F.J. Pérez-Rivarés, G. Pardo, C. Arenas
This work tests the relationship between quasi-periodic climate-linked parameters and cyclicity recorded through microbial lamination using spectral analysis of time series based on lamina thickness and luminance, as well as C and O stable isotope data. Three oncolites of the Ebro Basin were used: specimens C4-1 and C4-31 from a lacustrine bed dated at 13.8 My, and specimen VD-13 from a fluvial bed
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Increased sediment connectivity between deltas and deep-water fans in closed lake basins: A case study from Bozhong Sag, Bohai Bay Basin, China Sediment. Geol. (IF 2.8) Pub Date : 2023-12-16 Puyu Liu, Chenglin Gong, James H. Gearon, Dayong Guan, Qiming Wang, Kun Qi, Dongwei Li
The connection between deltaic clinothem growth and the formation of down-dip deep-water systems on continental margins has been extensively discussed as a crucial component of sequence stratigraphic theory. However, in lacustrine settings, the growth of deltaic clinothems and outlying deep-water fans remains comparatively poorly understood. In the southwestern Bozhong Sag, Bohai Bay Basin, China,
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Paleogeographic records of glacial and terminal glacial palynozones related to the Late Paleozoic Ice Age in the Brazilian portion of the Paraná Basin, Western Gondwana Sediment. Geol. (IF 2.8) Pub Date : 2023-12-06 Paulo A. Souza, Daiana R. Boardman, Eduardo Premaor, Cristina M. Félix, Rafael R. Bender
Among the four palynozones established for the Pennsylvanian–Permian sedimentary succession of the Paraná Basin, two are related to the glacial (AcZ: Ahrensisporites cristatus and CmZ: Crucisaccites monoletus zones) and one is related to the following terminal glacial phase (VcZ: Vittatina costabilis Zone) in this portion of Gondwana. The AcZ and the CmZ are typically recognized within the basal and
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The covariation between MgC isotopes and trace elements in dolostones: Implications for reconstructing the seawater chemistry Sediment. Geol. (IF 2.8) Pub Date : 2023-12-01 Zhongya Hu, Zhong Han, Anlin Ma, Zhiguang Xia, Lichao Wang, Weiqiang Li
Magnesium isotopes of marine dolomites have the potential to reconstruct the Mg isotopic signals of coeval seawater. However, a massive dolostone sequence can form via the coupling effects of multiple dolomitization events, which can potentially reset the Mg isotopic compositions of dolomites during each migration of the dolomitization fluid. How to distinguish changes of seawater chemistry and early
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Characteristics of quartz grains in the middle and lower reaches of the Hutubi River, NW China, and its paleo-environmental significance Sediment. Geol. (IF 2.8) Pub Date : 2023-11-29 Dianjia Tan, Yunqiang Ma, Zhizhong Li, Jianhui Jin, Rui Liu, Xiaojun Zou, Tonglian Tao
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Coarse-grained submarine channels: from confined to unconfined flows in the Colombian Caribbean (late Eocene) Sediment. Geol. (IF 2.8) Pub Date : 2023-11-25 Sergio A. Celis, Fernando García-García, Francisco J. Rodríguez-Tovar, Carlos A. Giraldo-Villegas, Andrés Pardo-Trujillo
Submarine channel mouth settings are hardly preserved in the stratigraphic record. Although they are still poorly known with respect to other segments of turbidite systems, conceptual models are being refined in the light of new discoveries in modern and ancient examples. Still, some questions such as the transition between expansion zones and the traditional Channel-Lobe Transition Zone (CLTZ) remains
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Outcrop-to-subsurface correlation and sequence stratigraphy of a mixed carbonate–siliciclastic ramp using element geochemistry and well logging; Upper Cretaceous Kometan Formation, Zagros Foreland, NE Iraq Sediment. Geol. (IF 2.8) Pub Date : 2023-11-20 Hussein S. Hussein, Ondřej Bábek, Howri Mansurbeg, Salahadin Shahrokhi
Surface analogues are suitable tools to link reservoir models to real facies but they require a robust outcrop-to-subsurface stratigraphic correlation. In this study, we correlate gamma-ray (GR), and porosity logs from nine wells drilled in the Cretaceous Kometan Formation, a prolific carbonate reservoir of northern Iraq, with geochemical logs from three sections representing surface analogues. The
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Quaternary stratigraphic architecture of the Pearl River Mouth continental shelf, northern South China Sea: Unraveling stratigraphic imprints of tectonism, paleoceanography, and climate change Sediment. Geol. (IF 2.8) Pub Date : 2023-11-19 Haiteng Zhuo, Xin Nie, Ming Su, Wei Zhou, Yaping Lei, Yingmin Wang, Xuechao Peng, Yan Qiu, Weiyao Yan, Li'e Lin
The complexity of continental shelf stratigraphy is determined by the interactions among various global or local factors. However, their specific roles are still poorly understood. Using a newly-acquired grid of single-channel seismic reflection profiles, combined with piston cores, shallow boreholes, and industrial wells, this study investigates the sequence stratigraphic architecture and evolution
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Petrography and geochemistry of sandstones of the Ash Shumaysi Formation in the Jeddah-Makkah region, Saudi Arabia: Implications for provenance, tectonic setting, paleoweathering, paleoclimate and paleogeography Sediment. Geol. (IF 2.8) Pub Date : 2023-11-19 Murad R. Abdulfarraj, Faisal A. Alqahtani, Hamdalla A. Wanas
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Palynological analysis (biochronostratigraphy and paleoenvironments) from a fossil-Lagerstätte section within the Late Paleozoic Ice Age unit of the Paraná Basin (Itararé Group), Western Gondwana Sediment. Geol. (IF 2.8) Pub Date : 2023-11-18 Daiana Rockenbach Boardman, Paulo A. Souza, Ana Karina Scomazzon, Cristina Moreira Félix, Ana Luisa Outa Mori, Luiz Carlos Weinschütz
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Aptian major changes in accommodation. New sedimentary evidence from the Maestrat Basin (E Iberia) Sediment. Geol. (IF 2.8) Pub Date : 2023-11-14 Telm Bover-Arnal, Joan Guimerà, Josep Anton Moreno-Bedmar, Carles Ferràndez-Cañadell, Ramon Salas
Global sea-level fluctuations with amplitudes of tens of metres and durations between 0.5 and 3 Myr are well-known oceanographic events of the Cretaceous Period. During recent years, major Cretaceous changes in accommodation recorded in different basins have been mainly interpreted as eustatically driven. Two episodes of major relative sea-level fall and rise of late early and early late Aptian age
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Tracking the Eurydesma Fauna transgression across southwestern Gondwana Sediment. Geol. (IF 2.8) Pub Date : 2023-11-07 Oscar López-Gamundí, Gabriela A. Cisterna, Andrea F. Sterren
The cold water Eurydesma Fauna, consisting of bivalves, brachiopods, and scarce gastropods, has been associated in several basins of Gondwana with the terminal phase of the Late Paleozoic Ice Age (LPIA). The Eurydesma Fauna – bearing transgression has been identified in basins of South America and southern Africa. In western Karoo Basin of South Africa four phases of ice growth and decay have been
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Hydrothermal signatures and prospecting indicators in sediments along the Carlsberg Ridge Sediment. Geol. (IF 2.8) Pub Date : 2023-11-07 Zhongyan Qiu, Xiqiu Han, Weijia Fan, Yejian Wang, Mou Li, Yiyang Cai
As the most widespread hydrothermal products in the oceans, metalliferous sediments are particularly useful in prospecting for seafloor massive sulfide (SMS) deposits. A comparative study of metalliferous sediments from two types of hydrothermal fields and the background sediments along the Carlsberg Ridge has been performed to reveal their hydrothermal signatures and to determine the prospecting indicators
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New constraints for the western Paleotethys paleogeography-paleotectonics derived from detrital signatures: Malaguide Carboniferous Culm Cycle (Betic Cordillera, S Spain) Sediment. Geol. (IF 2.8) Pub Date : 2023-10-26 Sara Criniti, Manuel Martín-Martín, Agustín Martín-Algarra
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Exploring the restricted Lontras Shale fossil record: Data biases or preservational casualties? Sediment. Geol. (IF 2.8) Pub Date : 2023-10-24 João Pedro Saldanha, Lucas Del Mouro, Bruno Becker-Kerber, João Henrique Zahdi Ricetti, Patrícia da Rocha Marques Nunes Balistieri, Luiz Carlos Weinschütz, Breno Leitão Waichel
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Reinterpreting glacial deposits as a MTD ponding sediment gravity flows in the upper Mojón de Hierro Formation (Tepuel–Genoa Basin, Argentina) Sediment. Geol. (IF 2.8) Pub Date : 2023-10-21 Natalie B. McNall, John L. Isbell, Arturo C. Taboada, M. Alejandra Pagani, Eduardo Menozzo da Rosa
The Late Paleozoic Ice Age (LPIA) was the longest and most extensive glacial interval during the Phanerozoic, lasting from the Late Devonian to the late Permian (362–254 Ma). Numerous questions remain on the spatial and temporal extent of the ice centers, the timing of expansion and contraction of the ice sheets, and the distribution of ice across Gondwana through time. The Tepuel–Genoa Basin, in Patagonia
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A combined methodology for reconstructing source-to-sink basin evolution, exemplified by the Triassic Songpan–Ganzi basin, central China Sediment. Geol. (IF 2.8) Pub Date : 2023-10-20 Guohui Chen, Fangyang Hu, Alastair H.F. Robertson, Eduardo Garzanti, Shaohua Zhang, Fu-Yuan Wu
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Formation and diagenesis of authigenic silicates in the Late Paleozoic alkaline lake deposits, Junggar Basin, NW China Sediment. Geol. (IF 2.8) Pub Date : 2023-10-18 Changzhi Li, Pei Guo, Kai Zhong, Jinghong Xu, Huaguo Wen
Authigenic silicates are typical minerals of alkaline lake deposits. Their mineral composition and lateral distribution can be used for reconstructing paleoclimates, paleoenvironments, and diagenetic subsidence histories of hydrocarbon reservoirs. In particular the examples of pre-Mesozoic alkaline lake deposits were widely missing in the literature. To unveil this, a basin-wide high-resolution mineralogical
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Sediment texture and geochemistry as predictors of sub-depositional environment in a modern estuary using machine learning: A framework for investigating clay-coated sand grains Sediment. Geol. (IF 2.8) Pub Date : 2023-10-18 T.E. Nichols, R.H. Worden, J.E. Houghton, R.A. Duller, J. Griffiths, J.E.P. Utley
Sedimentary cores from the Ravenglass Estuary lack some of the sedimentary structures which can be seen in other estuarine sands due to their unconsolidated nature, making it difficult to meaningfully interpret depositional environments using standard sedimentological facies analysis. Here we explore how sediment texture, obtained from laser particle size analysis, and geochemistry, obtained from portable
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Reactivity of glauconitic clasts during burial diagenesis Sediment. Geol. (IF 2.8) Pub Date : 2023-10-16 Rikke Weibel, Nynke Keulen, Stephen Hillier, Henrik Friis, Henrik Ingermann Petersen, Mette Olivarius, Sebastian Næsby Malkki, Jesper Stokkendal, Niels Hemmingsen Schovsbo
Palaeogene glauconitic reservoir sandstones in the produced Nini West oilfield in the Siri Canyon, Danish North Sea, are chosen as the first pilot CO2 storage site in Denmark. Since glauconitic clasts comprise up to 35 vol% of the sandstones, their stability is crucial for the reservoir permanence. The likely reactivity of glauconitic clasts during CO2 injection is evaluated from their changes during
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A tsunami deposit in the Stonewall Formation (Upper Ordovician), northeastern margin of the Williston Basin, Canada, and its tectonic and stratigraphic implications Sediment. Geol. (IF 2.8) Pub Date : 2023-10-07 Brian R. Pratt, Colin D. Sproat
The dolomudstone of the Stonewall Formation was deposited on the present-day northeastern side of the low-relief, relatively shallow, tropical Williston Basin of central Laurentia during the latest Ordovician. This unit hosts a geographically widespread carbonate conglomerate, up to 0.5 m thick and consisting of rudstone to floatstone, that thins and eventually disappears westward and southward. The
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Ediacaran microbial mats and microbially induced sedimentary structures in lacustrine deposits, Arabo-Nubian Shield, Egypt Sediment. Geol. (IF 2.8) Pub Date : 2023-10-02 Zaki A. Abdel-Fattah, Haytham Sehsah, Rogers C.C. Buntin
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A carbonate palustrine system with marshes and shallow ephemeral lakes (Campanian, northeastern Iberian Basin) Sediment. Geol. (IF 2.8) Pub Date : 2023-09-26 Diego Torromé, Marcos Aurell, Andrea Martín-Pérez, Adrijan Košir
The sedimentary and stratigraphic features of the low-gradient slope carbonate palustrine system of the Fortanete Formation (northeast Spain) during the early Campanian have been studied. The succession of the Fortanete Fm provides depositional record of a progressive transition to continental settings in an area that was predominantly marine for most of the Late Cretaceous. Palustrine systems can
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The control of particulate matter and hydrogeochemistry on uranium‑thorium partition coefficients in two representative lakes, Qaidam Basin, China Sediment. Geol. (IF 2.8) Pub Date : 2023-09-25 Pu Zhang, Zhe Zhang, Lei Li, Chenyang Cao, Xuerou Li, Guangyou Zhu, R.Lawrence Edwards
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Confined turbidite system of the upper Paleozoic Itararé Group, Paraná Basin, Brazil: Beyond the topographic control paradigm Sediment. Geol. (IF 2.8) Pub Date : 2023-09-25 Claus Fallgatter, Paulo Sérgio Gomes Paim, Deise M. Silveira, Victoria Valdez Buso, Carolina Danielski Aquino
Recent studies in the eastern margin of the Paraná Basin, about the initial deposition of the Taciba Formation (Itararé Group) revealed a preserved, partially exhumed glacial trough as indicated by the morphology of its basal nonconformity. In this work, we reinforce the importance of the glacially-carved topography controlling the subsequent sedimentation by emphasizing turbidity currents and their
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Formation processes of paper-thin raft and coated bubble: Calcium carbonate deposition at gas-water interface Sediment. Geol. (IF 2.8) Pub Date : 2023-09-21 Fumito Shiraishi, Takayuki Akimoto, Naotaka Tomioka, Satoko Motai, Yoshio Takahashi
Travertines are hot spring carbonate deposits that exhibit characteristic fabrics, including a paper-thin raft and a coated bubble formed by the calcification of water and bubble surfaces, respectively. A previous study interpreted that compared with the water surface, the bubble surface display more active CO2 degassing and resultant active CaCO3 precipitation. However, considering the CO2 partial
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The environmental transformation mechanism of the coal- and oil shale-bearing interval in the Eocene Dalianhe Formation, Yilan Basin, Northeast China Sediment. Geol. (IF 2.8) Pub Date : 2023-09-18 Qingtao Meng, Jianan Kang, Wenren Zeng, Fei Hu, Zhaojun Liu, Penglin Zhang, Jinguo Li, Li Li
Assemblages of multiple organic matter (OM)-related sedimentary energy systems are common in the Eocene nonmarine basins of Northeast China. During the Middle Eocene Climatic Optimum, oil shale developed in large quantities in the Yilan Basin. Numerous scientific papers have concentrated on the sedimentary cycle and industrial quality of the coal- and oil shale-bearing intervals, whereas few studies
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Limnogeology of the Agua de la Zorra Formation (Middle–Upper Triassic), Cuyana Basin, NW Argentina: Emphasising lacustrine carbonates Sediment. Geol. (IF 2.8) Pub Date : 2023-09-21 Zuriñe Larena, Cecilia Andrea Benavente, Tomás Pedernera, Adriana Mancuso, Eduardo Guillermo Ottone
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Reducing-condition reworked phosphorite sedimentary model: Petrographic and geochemical evidence from the Lower Cretaceous in the Thaniyat area, northern Saudi Arabia Sediment. Geol. (IF 2.8) Pub Date : 2023-09-09 Yunlong Zhang, Ziying Li, Mingkuan Qin, Zhe Yang, Ruiping Liu, Zhixing Li, Longsheng Yi, Li Jiang
The Thaniyat phosphorite, occurred in northern Saudi Arabia, is a component of a massive phosphorite deposit that was formed in the Late Cretaceous to Paleogene era within the southern Neo-Tethys Ocean. To gain insights into the sedimentary environments and formation processes of these phosphorites, samples were collected from the Thaniyat Phosphorite Member in northern Saudi Arabia and analyzed using