Sedimentary Geology最新文献

{"title":"Environmental and oceanographic evolution in the Southern Qiangtang Basin (eastern Tethys) during the latest Pliensbachian to early Toarcian (Early Jurassic)","authors":"Changjun Ji ,&nbsp;Ahmed Mansour ,&nbsp;Yun Chen ,&nbsp;Zhenhan Wu ,&nbsp;Mohamed S. Ahmed ,&nbsp;Wolfgang Ruebsam ,&nbsp;Guoqing Xia","doi":"10.1016/j.sedgeo.2025.106882","DOIUrl":"10.1016/j.sedgeo.2025.106882","url":null,"abstract":"<div><div>The late Pliensbachian-early Toarcian (Early Jurassic) interval is marked by significant climatic changes that affected environmental and paleoceanographic conditions, impacting biogeochemical cycles, as well as marine and terrestrial ecosystems. The most profound environmental changes occurred across the Pliensbachian/Toarcian boundary (P/T B) and in the early Toarcian. Both events align with phases of increased greenhouse gas emissions, global warming, sea-level rises, intensified hydrological cycles, and continental weathering. The Toarcian coincides with the expansion of oxygen-deficient conditions in oceanic and at various shelf areas, marking the Toarcian Oceanic Anoxic Event (T-OAE). In this study, we present high-resolution inorganic geochemical data from the Qixiangcuo section of the Southern Qiangtang Basin, which records both the P/T B and early Toarcian events. The section studied reflects a shallow shelf environment in northeastern part of the Tethys Ocean. Element ratios, such as Ti/Al and Zr/Al, interpreted as sediment grain size proxies, reveal characteristic changes that can be linked to the interplay between sea-level changes and shifts in continental weathering and terrigenous sediment influx. Secular trends in these grain-size proxies reflect sea-level dynamics during the late Pliensbachian-early Toarcian, with notable transgressions at the P/T B and early Toarcian. The early Toarcian event further coincides with increased terrigenous material in response to an intensified hydrological cycle, as evidenced by transient increases in grain-size proxies and higher paleo-weathering indices (e.g., ln(Al₂O₃/Na₂O)). Despite the increased nutrient flux to the paleo-shelf sea, enrichment factors (EF) of productivity proxies (Zn_EF, Cu_EF, Ba_EF, Ni_EF) do not show increases in organic matter export to the sediments. Thus, organic matter-lean sediments (total organic carbon &lt;0.5 wt%) have accumulated in the Southern Qiangtang Basin during the latest Pliensbachian-early Toarcian. The lack of enrichment in redox-sensitive elements, such as Mo, V, and U in the sedimentary rocks of the Qixiangcuo section, points to a well‑oxygenated environment. Accordingly, although the T-CIE is identified in the study section, the T-OAE did not develop in this paleogeographic area. The new data thereby highlight the role of local-regional paleoenvironmental and paleoceanographic parameters as important factors contributing to the genesis of the T-OAE and the burial of organic carbon in marine sediments.</div></div>","PeriodicalId":21575,"journal":{"name":"Sedimentary Geology","volume":"482 ","pages":"Article 106882"},"PeriodicalIF":2.7,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sequence architecture of a Miocene marginal shelf sea influenced by tectonic activity: A case study of Eastern Yinggehai Basin, South China Sea","authors":"Zhen Wang ,&nbsp;Benzhong Xian ,&nbsp;Qian Ma ,&nbsp;Caiwei Fan ,&nbsp;Jianping Liu ,&nbsp;Qianran Wu ,&nbsp;Rongheng Tian ,&nbsp;Hui Li ,&nbsp;Ximeng Zhang ,&nbsp;Wenmiao Zhang","doi":"10.1016/j.sedgeo.2025.106879","DOIUrl":"10.1016/j.sedgeo.2025.106879","url":null,"abstract":"<div><div>While sequence stratigraphic frameworks of passive continental margins have been extensively studied, their counterparts in semi-enclosed marginal shelf seas remain poorly understood. This study investigates the sequence architecture and depositional patterns of a marginal shelf sea system through integrated analysis of 3D seismic, well-log, and core data from the Miocene succession in the Yinggehai Basin, South China Sea. The Miocene strata were subdivided into seven third-order sequences whose architectures and sedimentary associations were governed by the interplay between slope-break geometries, sea-level fluctuations, and sediment supply. Three distinct shelf sequence types (A1, A2, and B) were recognized based on spatial configurations of slope breaks and relative sea-level positions. Type A1 sequence (Huangliu Formation and Mei1 Member) consists of multiple slope breaks at basin margins and in the interior basin, with sea-level falls exceeding the elevation of interior slope breaks. The sequence preserves complete systems tracts, including early lowstand (gravity flow-dominated), late lowstand, transgressive, and highstand tracts. In contrast, Type A2 sequence (Mei2 Member), though retaining multiple slope breaks, lacks early lowstand systems tracts due to insufficient sea-level fall to expose interior slope breaks. Type B sequence (Sanya Formation) features solely basin-margin fault-controlled slope breaks and shares systems tract compositions with Type A2. Sedimentary processes vary markedly among sequence types. Type A1 sequence hosts multi-phase, large-scale gravity flow deposits encompassing submarine fans, slope-perpendicular channels, and slope-parallel channels, with maximum development during early lowstand conditions. Type A2 sequence is characterized by braided river deltas interfingering with shelf mudstones, accompanied by limited gravity flow activity. Type B sequence comprises shallow marine facies and small-scale braided deltas. Hydrocarbon implications emerge from the preferential occurrence of reservoir-quality gravity flow sands in Type A1 lowstand systems tracts, while regional seals and source rocks are associated with shelf mudstones in Type A2 and B sequences. The sequence evolution is primarily controlled by <em>syn</em>-depositional tectonics (fault reactivation, post-rift subsidence) and semi-enclosed paleogeomorphology, secondarily by sediment influx and eustasy. This framework advances predictive models for shelf-scale sequence development in restricted marine settings and provides critical insights for global hydrocarbon exploration in analogous basins.</div></div>","PeriodicalId":21575,"journal":{"name":"Sedimentary Geology","volume":"482 ","pages":"Article 106879"},"PeriodicalIF":2.7,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143807564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Types and formation mechanisms of authigenic quartz in the Late Paleozoic alkaline lacustrine shales, NW China","authors":"Changzhi Li ,&nbsp;Zhiming Li ,&nbsp;Pei Guo ,&nbsp;Jian Wang ,&nbsp;Wangwei Liu ,&nbsp;Baozhen Zhang ,&nbsp;Meiyuan Song ,&nbsp;Kai Zhong ,&nbsp;Jinghong Xu","doi":"10.1016/j.sedgeo.2025.106880","DOIUrl":"10.1016/j.sedgeo.2025.106880","url":null,"abstract":"<div><div>Authigenic quartz controls the storage and mechanical properties of shales, and has attracted a growing attention in marine and continental shales. The silica solubility in alkaline lakes is high due to the high lake water pH (&gt;9) and thus alkaline lacustrine shales generally contain abundant authigenic quartz. However, the occurrences and formation of authigenic quartz in alkaline lacustrine shales and its impact on shales remain poorly studied. To solve these problems, we systematically studied the Late Paleozoic alkaline lacustrine Fengcheng Formation in the Mahu Sag of the Junggar Basin via optical microscope and scanning electron microscope observations and elemental analyses. Four types of authigenic quartz have been identified in the Fengcheng Formation (shales): chert nodules or bands, matrix-dispersed microquartz, mineral-replacive quartz, and veins-filling quartz. The Fengcheng Formation shales contain excess SiO₂ ranging from 11.3 % to 60.4 % based on element calculation and matrix-dispersed microquartz is the dominant type of authigenic quartz, followed by cherts. Cherts and matrix-dispersed microquartz were formed during syndepositional to early diagenetic stage, sourced from pH-driven dissolution of detrital quartz grains and transformation of volcanic materials in highly alkaline water. Both chert and matrix-dispersed microquartz formation can increase the rock strength of shales while matrix-dispersed microquartz can also form massive intercrystalline pores and protect the micropores from compaction. In contrast with marine and non-alkaline lacustrine siliceous shales, alkaline lacustrine shales have a higher abundance and more formation stages of authigenic quartz, and can form high-quality shale reservoirs with high contents of organic matter and authigenic quartz in shallow-water zone.</div></div>","PeriodicalId":21575,"journal":{"name":"Sedimentary Geology","volume":"482 ","pages":"Article 106880"},"PeriodicalIF":2.7,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Balanoglossites ichnofabrics in the aftermath of the Permian-Triassic mass extinction","authors":"Pengbing Yan ,&nbsp;Xueqian Feng ,&nbsp;Shiwei Shang ,&nbsp;Zhong-Qiang Chen ,&nbsp;He Zhao ,&nbsp;Ding Zhou ,&nbsp;Zijie Zheng ,&nbsp;Zemin Zheng","doi":"10.1016/j.sedgeo.2025.106877","DOIUrl":"10.1016/j.sedgeo.2025.106877","url":null,"abstract":"<div><div>Trace fossils are widely distributed in pre-extinction Permian successions, and are also relatively common in the Lower Triassic strata. They have been used for evaluating the recovery process of marine infaunal ecosystem following the Permian-Triassic (P-Tr) mass extinction. However, one complicated ichnogenus <em>Balanoglossites</em> has not been clearly recognized and described in the Early Triassic previously, and its importance in revealing biotic recovery in the aftermath of the P-Tr mass extinction has not been evaluated. Here we documented <em>Balanoglossites</em> ichnofabrics from the Lower Triassic Yongningzhen Formation of the Yongningzhen section from Guizhou Province, South China. <em>Balanoglossites</em> is characterized by three-dimensional complex burrow system with Y-shaped and J-shaped galleries and multiple openings, and the herein described form is assigned to <em>B. triadicus</em>. Microstructures of <em>Balanoglossites</em> under SEM and EDS revealed oxidized pyrite framboids occurred merely near the burrow wall, which may be related to activities of the trace maker and symbiotic microorganism such as sulphate-reducing bacteria. Raman spectrum mapping showed that organic matter was enriched along the burrow boundaries of <em>Balanoglossites</em>, but was lacking in the burrow fill. This pattern may result from the impregnation of the burrow walls with organic mucus and bioirrigation by the trace maker. Polychaetes are considered as the most possible trace makers of <em>Balanoglossites</em>, and they were opportunistic pioneers that proliferated in the Early Triassic. The low ichnodiversity of <em>Balanoglossites</em>-bearing strata contrasts with coeval ichnoassemblages, which probably results from intense bioturbation by deeper-tier burrows that prevents the preservation of surficial to shallow-tier trace fossils. Although <em>Balanoglossites</em> is a complex burrow, its occurrence in the Early Triassic is not an indicator of the full recovery of infaunal ecosystem.</div></div>","PeriodicalId":21575,"journal":{"name":"Sedimentary Geology","volume":"481 ","pages":"Article 106877"},"PeriodicalIF":2.7,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143785527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integrated investigation of rare earth elements, molecular fossils, and stable isotopes in drill cores from deep-buried strata in the Yangtze Block: Implications for the Early Cambrian sedimentary environments","authors":"Moïse Luemba ,&nbsp;Zhonghong Chen ,&nbsp;Zhi Chai ,&nbsp;Yong Chen ,&nbsp;N'nahano-Ruhindwa Heritier ,&nbsp;Raphael Matamba","doi":"10.1016/j.sedgeo.2025.106878","DOIUrl":"10.1016/j.sedgeo.2025.106878","url":null,"abstract":"<div><div>Geological records of the Lower Paleozoic indicate the co-occurrence of large-scale geo- and bio-events, including the diversification of marine complex life and widespread phosphogenesis, making the Early Cambrian aquatic environments a long-standing subject of global interest. Despite extensive research, the interplay between paleoclimate, continental chemical weathering, seawater redox conditions, and salinity during the Cambrian Explosion remains debated. To address this, we conducted geochemical analyses (e.g., XRF, ICP-MS, MRM GC–MS, and IRMS) and optical microscopy on drill cores from the Early Cambrian deep-buried strata (&gt;4 km depth) in an intrashelf basin within the Yangtze Block. Geochemical proxies, including pronounced negative cerium anomalies (as low as 0.20) and a positive pristane-to-phytane ratio excursion, indicate an expansion of oxic waters between ∼531 and 526 Ma, while widespread anoxic conditions prevailed around 531 and 526 Ma. Climate fluctuations between arid and humid periods are inferred from major elements (e.g., Al, Fe, Mn), trace element ratios (e.g., Rb/Sr, Sr/Cu), and rare earth element parameters (e.g., ΣLREE/ΣHREE, Y/Ho). High gammacerane index values (up to 0.41), the presence of <em>β</em>-carotene, elevated Sr/Ba ratio, and <em>δ</em>^<em>18</em><em>O</em> values (up to −4.87 ‰) suggest periods of high salinity and evaporative conditions during arid phases. Organic geochemical signatures, including a high carbon preference index (CPI &gt; 1) and highly negative <em>δ</em>^<em>13</em><em>C</em> values (&lt;−24 ‰), indicate a biological origin of organic matter, with measurable 2-methylhopane (up to 2.48 %) and 4-methylsterane indices (up to 20 %) suggesting contributions from primary producers such as cyanobacteria, alphaproteobacteria, and dinoflagellates. The co-occurrence of oxygenated, highly saline, and evaporative Ca-P-rich waters with the diversification of small shelly fossil assemblages (SSFs 2 and 3) suggests that the studied intrashelf basin provided a favorable setting for the emergence and diversification of complex life. These findings offer new insights into the paleoenvironmental conditions that shaped marine ecosystems during the Cambrian radiation.</div></div>","PeriodicalId":21575,"journal":{"name":"Sedimentary Geology","volume":"481 ","pages":"Article 106878"},"PeriodicalIF":2.7,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143768891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Introducing a water activity coefficient to account for abundance and isotopic compositions of gypsum and halite in the Mediterranean's salt giant deposit","authors":"William B.F. Ryan ,&nbsp;Fadl Raad","doi":"10.1016/j.sedgeo.2025.106876","DOIUrl":"10.1016/j.sedgeo.2025.106876","url":null,"abstract":"<div><div>A simple box model is developed to access the astronomical-modulated exchange of ocean seawater with the Mediterranean during the Late Miocene salinity crisis. The model differs from previous ones by using a unidirectional portal as the method to get salinity to increase to saturation for gypsum and halite. Flow through the entry portal switches in direction as climate oscillates from arid to wet during each precession cycle. The calculations incorporate a water activity coefficient that reduces the rate of evaporation as salinity increases. As a result, the accumulation rate of gypsum and halite declines with time. The sodium, sulfate, potassium and magnesium ions observed from fluid inclusions in gypsum and halite are replicated in the model. The reduction in input from the exterior ocean and eventual closure of the gateway conforms with the sedimentological and geochemical behavior of the gypsum deposits on margins and halite in salt mines and reflection profiles. By showing that rain and rivers supply eight times more water to the Mediterranean brine than seawater during the hypersaline stage of the Late Miocene salinity crisis, the calculations resolve the geochemical riddle of “<em>low salinity gypsum</em>”. The sulfur isotopes in gypsum derive from ocean seawater and the oxygen and hydrogen isotopes in the gypsum hydration water from atmospheric precipitation.</div></div>","PeriodicalId":21575,"journal":{"name":"Sedimentary Geology","volume":"481 ","pages":"Article 106876"},"PeriodicalIF":2.7,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Surface microtextures of quartz grains under intermittent sediment transport in a gravel bed in the Hantan River, South Korea","authors":"Soyoung Baek ,&nbsp;Kyoung-nam Jo","doi":"10.1016/j.sedgeo.2025.106874","DOIUrl":"10.1016/j.sedgeo.2025.106874","url":null,"abstract":"<div><div>Surface microtextures of quartz grains (SMQs), which are observable using scanning electron microscopy (SEM), provide direct evidence for reconstructing the sedimentary history of individual grains. Detailed SMQ investigations across diverse modern river systems are essential to better understand the factors controlling SMQ formation in fluvial sediments; however, comprehensive studies of diverse modern fluvial systems remain limited. In this study, we examined SMQ characteristics in a gravel bed of the monsoon-influenced Hantan River on the Korean Peninsula. Hantan River sediments maintain angular to subangular grain outlines throughout downstream areas, exhibiting no gradual changes in either grain outlines or other mechanical microtextures. In contrast to typical fluvial sediment characteristics, upturned plates predominate rather than V-shaped percussion cracks. These features reflect episodic sediment transport driven by seasonal discharge variations in this gravel bed river system. Statistical analysis revealed distinct SMQ frequencies between the mainstream and tributaries, with the mainstream showing higher abrasion features (subangular outlines, conchoidal fractures, and V-shaped percussion cracks), whereas tributaries exhibited fresher surfaces (angular outlines and flat cleavage surfaces). These differences primarily reflect variation in transport distance from source areas, as tributaries, which are shorter and surrounded by mountainous terrain, maintained more direct sediment input characteristics, whereas mainstream sediments showed mixed features due to longer transport distance and tributary inputs. Our SMQ study in modern fluvial environments contributes to enhanced interpretations of past depositional conditions and further suggests a need to refine current SMQ classification systems.</div></div>","PeriodicalId":21575,"journal":{"name":"Sedimentary Geology","volume":"481 ","pages":"Article 106874"},"PeriodicalIF":2.7,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143679209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum to “Shell beaches to beachrock: Diagenetic stable isotopic trends” [Sediment. Geol. 391 (2019) 105520]","authors":"Megan Brock Casillas,&nbsp;Henry S. Chafetz","doi":"10.1016/j.sedgeo.2025.106872","DOIUrl":"10.1016/j.sedgeo.2025.106872","url":null,"abstract":"","PeriodicalId":21575,"journal":{"name":"Sedimentary Geology","volume":"481 ","pages":"Article 106872"},"PeriodicalIF":2.7,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A comprehensive analysis of the Cambrian Drumian carbon isotope excursion (DICE): Insights from paleoclimate, paleoenvironment and global correlations","authors":"Qiang Gu ,&nbsp;Fengcun Xing ,&nbsp;Karem Azmy ,&nbsp;Xin Jin ,&nbsp;Xiaoquan Chen ,&nbsp;Chunlin Zhang ,&nbsp;Hongshan Qian ,&nbsp;Jiao Wen","doi":"10.1016/j.sedgeo.2025.106875","DOIUrl":"10.1016/j.sedgeo.2025.106875","url":null,"abstract":"<div><div>The Drumian Carbon Isotope Excursion (DICE) has been proposed as a potential marker for the Global Boundary Stratum Section and Point (GSSP) at the base of the Drumian. However, the characteristics of δ¹³C excursions (i.e., strength, number of subpeaks, and range of the excursion) show significant regional variability, necessitating further verification. Additionally, the paleoenvironmental conditions during the DICE event require deeper investigation to better understand their nature and mechanism. The current study examines carbon-isotope variations across the Qinglongshan section, a representative site within the Miaolingian–Furongian carbonate platform of the Ordos Basin, which spans the DICE event. The δ¹³C profile of the section documents several key carbon-isotope excursion events: the global Steptoean Positive Isotopic Carbon Excursion (SPICE, ∼2.5 ‰ positive excursion), DICE (∼4.0 ‰ negative excursion 1), and a potential globally negative excursion 2 (NE2, ∼3.5 ‰) which may correlate with the Drumian–Guzhangian boundary. These excursions are linked to major fluctuations in the carbon cycle and significant environmental changes. Sedimentological and geochemical analyses suggest that the DICE event coincided with marine transgression and a shift from warm and arid to more humid climate. The climate transition likely enhanced chemical weathering and increased terrestrial detrital input, leading to reduced salinity and intermittent anoxic conditions. Variations in seawater chemistry driven by sealevel and terrestrial input fluctuations likely contributed to the deposition of alternating red beds and negative excursion of DICE. Minor discrepancies in the stratigraphic position of the global δ¹³C peak may reflect uncertainties in biostratigraphy or limitations in data resolution. Moreover, terrestrial input is thought to have influenced both the amplitude of the peak negative δ¹³C values and the overall duration of the DICE event.</div></div>","PeriodicalId":21575,"journal":{"name":"Sedimentary Geology","volume":"481 ","pages":"Article 106875"},"PeriodicalIF":2.7,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143679207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sequence stratigraphy in continental endorheic basins: New contributions from the case of the northern extensional Teruel Basin","authors":"Lope Ezquerro ,&nbsp;Carlos L. Liesa ,&nbsp;José L. Simón ,&nbsp;Aránzazu Luzón","doi":"10.1016/j.sedgeo.2025.106868","DOIUrl":"10.1016/j.sedgeo.2025.106868","url":null,"abstract":"<div><div>The tectono-sedimentary analysis is a sequence stratigraphy method particularly useful in continental tectonically active basins far from the influence of sea level changes. It provides a comprehensive study of the sedimentary features and stratigraphic architecture of a basin focusing on the stratigraphical, mainly cyclic, trend of the rock record in order to define genetic (tectono-sedimentary units-TSUs) controlled by allocyclic factors: tectonics and climate. The tectono-sedimentary analysis has been traditionally used in basins related to compressive stress regimes, but their application in extensional basins is less common. In this work the results of the detailed tectono-sedimentary analysis of the northern Teruel Basin rocks are presented. Vertical and lateral distribution of mappable lithofacies associations reveal different depositional systems laterally related and the main paleogeographic changes from the Late Miocene to Early Gelasian (11–1.8 Myr). Five main alluvial progradational-retrogradational cycles integrate six TSUs with chronostratigraphical meaning, bounded by isochronous stratigraphic surfaces (sedimentary breaks) that represent maximum alluvial progradations, and define the basin geodynamic framework. A main challenge, not commonly addressed in this kind of studies, is the discrimination of the effects of tectonic and climate for each unit, which has been based on evidences of synsedimentary tectonism in combination with δ¹⁸O_PDB isotope data. It is demonstrated that the sedimentary evolution was mainly controlled by the tectonics, with the phases of tectonic activity being consistently recorded as alluvial progradations (correlative lacustrine retractions) and climate only modulating (amplifying or vanishing) the tectonic effects. Certain guidelines are proposed to adequately recognize and characterize genetic units in continental extensional basins. Our results reinforce TSUs as very valuable tools for studying active continental basins far from sea level effects and to discriminate the influence of allogenic controls in sedimentation.</div></div>","PeriodicalId":21575,"journal":{"name":"Sedimentary Geology","volume":"481 ","pages":"Article 106868"},"PeriodicalIF":2.7,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143679208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}