Gondwana Research最新文献

{"title":"Western Australian Tumblagooda Sandstone record of early Paleozoic life on land","authors":"Gregory J. Retallack","doi":"10.1016/j.gr.2025.11.023","DOIUrl":"10.1016/j.gr.2025.11.023","url":null,"abstract":"<div><div>The geological age of the fluvial-eolian Tumblagooda Sandstone has been controversial with advocates for Cambrian, Ordovician, Silurian, and Early Devonian age, but this study finds evidence for all of the above in different parts of the formation. Cambrian is indicated by conodonts, Ordovician by euthycarcinoids, Ordovician-Silurian by spores, and Early Devonian by fish scales. A paleomagnetic paleopole and reversal near the top of local outcrops of Tumblagooda Sandstone on the coast near Kalbarri is the same as 9 other Ordovician paleopoles and very different from 7 Silurian paleopoles. Like paleomagnetism, pedostratigraphy using greenhouse transients from calcic horizon depth in paleosols requires independent time constraints, and is here reassessed to confirm that Tumblagooda Sandstone identified in the Wendy core is much younger (Silurian-Devonian) than the formation along the Murchison River and sea cliffs near Kalbarri (Cambrian-Silurian). New age constraints demonstrate that colonization of land by animals, plants, and lichens fueled the marine Great Ordovician Biodiversification Event. Documented increases in soil weathering, transpiration, and nutrient depletion were later exceeded with advent of vascular plant roots and stomates during the Silurian-Devonian Terrestrial Revolution.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"153 ","pages":"Pages 218-235"},"PeriodicalIF":7.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145823490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Shaping the green future: How energy transition and eco-innovation can influence the financial development-ecological footprint nexus in EU countries","authors":"Xiaoli Wang ,&nbsp;Mahmood Ahmad ,&nbsp;Zahoor Ahmed ,&nbsp;Xiyue Yang","doi":"10.1016/j.gr.2025.12.005","DOIUrl":"10.1016/j.gr.2025.12.005","url":null,"abstract":"<div><div>The financial sector stands at a critical crossroads in the 21st century, wielding immense power to shape our world’s economic landscape and environmental future. The role of finance in climate change is increasingly scrutinized as the world grapples with environmental degradation. Once a cornerstone of economic growth, financial development faces a paradox: how can it drive prosperity while enhancing environmental quality? While previous research has extensively explored the economic implications of financial development, its potential to improve environmental quality through mechanisms like energy transition and eco-innovation remains relatively unexplored. This study explores the interplay between financial development, energy transition, and eco-innovation in shaping the environmental quality in EU nations. Advanced econometric techniques, including the panel quantile regression and Artificial Neural Network (ANN) methods, are utilized to achieve this objective. The results reveal that while financial development significantly increases the ecological footprint, energy transition and eco-innovation contribute to its reduction. Interestingly, the interaction between financial development and energy transition negatively impacts the ecological footprint, suggesting that financial development can indirectly improve environmental quality when aligned with energy transition efforts. Similarly, the interaction between financial development and eco-innovation exhibits a negative effect, although its significance varies across different quantiles. The results remain consistent after the robustness check. These findings have important implications for EU policymakers seeking to achieve sustainable development goals, particularly in balancing financial sector growth with environmental protection. The study suggests implementing differential regulatory frameworks for financial institutions. Specifically, it proposes imposing stricter credit regulations on environmentally polluting industries while creating more favorable lending conditions for sustainable energy investments and eco-innovative enterprises. These policies will likely align financial sector development with sustainable development.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"153 ","pages":"Pages 291-304"},"PeriodicalIF":7.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145893891","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Artificial intelligence-driven environmental toxicology: Emerging strategies for microplastics risk assessment","authors":"Zeliang Su ,&nbsp;Luyi Zhang ,&nbsp;Kai Chen ,&nbsp;Linyong Zhi ,&nbsp;Xiaoping Huan ,&nbsp;Fang Chen ,&nbsp;Xu Wang ,&nbsp;Jun Wang","doi":"10.1016/j.gr.2025.11.021","DOIUrl":"10.1016/j.gr.2025.11.021","url":null,"abstract":"<div><div>Microplastics (MPs), as an emerging contaminant ubiquitously distributed in the environment, exhibit complex physicochemical properties and environmental behaviors, thereby hindering their toxicological assessment. Artificial intelligence (AI), with its capacity to process heterogeneous and high-dimensional data, offers new opportunities to advance MPs toxicology. To promote the integration of these fields, this review outlines the computational foundations and modeling workflows of AI in toxicology, summarizes recent progress and challenges in MPs research, and discusses current and emerging AI applications related to MPs toxicology. Main results include: (1) A summary of the multilayered data types involved in environmental toxicology highlights their suitability as inputs for AI modeling. Selecting appropriate preprocessing strategies and modeling approaches according to data characteristics and experimental objectives is essential for generating reliable outcomes. (2) MPs toxicology has expanded rapidly, establishing methodological frameworks across multiple biological levels. However, the field remains fragmented, with major gaps in ecological relevance, standardization, and translational validity. (3) AI has been applied to particle identification, structure-based toxicity prediction, multi-omics integration, and shared-data analysis. It is further expected to enable cross-scale phenotypic prediction, mechanistic discovery, and standardized risk assessment. (4) Major challenges in applying AI to MPs toxicology include limited data volume, poor model interpretability, insufficient computational capacity, and weak regulatory integration. Addressing these issues requires standardized experimental protocols, interdisciplinary collaboration, and international coordination. In summary, AI provides a transformative framework to strengthen MPs toxicology and enable accelerated, ethically aligned, and integrative environmental risk assessment.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"153 ","pages":"Pages 170-183"},"PeriodicalIF":7.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145823784","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Metagenomics insights into the effect of microplastics and/or cadmium on carbon, nitrogen, and phosphorus cycles in freshwater sediments","authors":"Xiao Ma ,&nbsp;Xueli Wang ,&nbsp;Zhanfeng Cui ,&nbsp;Yingyuan Zhang ,&nbsp;Shaoqi Zhou","doi":"10.1016/j.gr.2025.10.023","DOIUrl":"10.1016/j.gr.2025.10.023","url":null,"abstract":"<div><div>The accumulations of microplastics (MPs) and cadmium (Cd) are ubiquitous in sediments. However, the impact of MPs and Cd on element cycles in sediments, particularly on greenhouse gas (GHG) emissions, has not been systematically reported. Herein, a microcosm experiment was conducted to investigate the responses of sedimentary carbon, nitrogen and phosphorus transformation processes, GHG emissions and microbial communities to MPs, Cd and MPs + Cd. The results indicate 1 %w/w of polyethylene (PE) or polystyrene (PS) MPs stimulated N₂O, CO₂ and CH₄ emissions primarily through the regulation of genes associated with denitrification (<em>nosZ</em> and <em>norBC</em>), organic carbon degradation and methanogenesis (<em>mtrA</em>, <em>mttB</em> and <em>pmoABC</em>), respectively. Both 1 %w/w of PE MPs and PS MPs significantly inhibited the ALP activity and the expression of organic phosphate mineralizing genes (<em>phoD</em>, <em>phoN</em> and <em>phnX</em>), ultimately reducing the Bio-P content. Additionally, 8 mg kg⁻¹ of Cd inhibited the CO₂ and CH₄ emissions primarily through the regulation of genes associated organic carbon degradation and methanogenesis (<em>mttB</em> and <em>pmoABC</em>), but it stimulated N₂O emissions primarily through the down-regulation of gene <em>nosZ</em> and hence had no significant effect on global warming potential (GWP). Notably, the coexistence of MPs and Cd could impact microbial communities in MPs biofilms and promote the expression of gene <em>nosZ</em>, which may ultimately antagonize N₂O emissions. These findings provide a scientific basis for the ecological management of watersheds polluted by MPs and/or Cd, in particular, illustrate the need for a closer integration of microbial C-N-P interactions.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"153 ","pages":"Pages 134-149"},"PeriodicalIF":7.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145583549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Magma sources in the northern part of the Cretaceous Okhotsk-Chukotka volcanic belt (NE Asia): Spatial zonation, temporal variations, and links to tectonic history of the basement","authors":"P.L. Tikhomirov ,&nbsp;I.E. Lebedev ,&nbsp;T.E. Bagdasaryan ,&nbsp;E.A. Kalinina ,&nbsp;C. Sakaguchi ,&nbsp;K. Kobayashi","doi":"10.1016/j.gr.2025.12.006","DOIUrl":"10.1016/j.gr.2025.12.006","url":null,"abstract":"<div><div>We present new geochemical data including whole-rock major and trace element analyses and Sr– Nd–Pb isotopic ratios for volcanic rocks from the northern part of the extensive Okhotsk–Chukotka Volcanic Belt (OCVB), a Cretaceous (ca. 106–71? Ma) subduction-related igneous province in NE Asia. Integration of previously published and new data revelas a clear along-arc zonation within the northern OCVB and demonstrates a correlation between magma isotopic composition and the age of the continental basement beneath the belt. A first-order distinction is observed between the Anadyr segment of the OCVB, underlain by relatively young and mafic continental crust (initial ⁸⁷Sr/⁸⁶Sr of 0.7032 to 0.7048, εNd of –1.3 to + 7.3, and ²⁰⁶Pb/²⁰⁴Pb of 18.17 to 18.51), and the Central Chukotka and East Chukotka segments superimposed on the Chukotka continent where the crust has been forming since at least the Neoproterozoic (initial ⁸⁷Sr/⁸⁶Sr of 0.7042 to 0.8685, εNd of –5.5 to + 2.5, and ²⁰⁶Pb/²⁰⁴Pb of 18.42 to 18.85). We suggest that the mafic magmas of the northern OCVB are largely derived from subcontinental lithospheric mantle domains that preserve distinct isotopic characteristics within each major terrane. The only significant temporal change in the elemental and isotopic composition occurred during the final magmatic stage at ca. 76–73 Ma, when declining heat flow led to reduced magma output rate, the extinction of crustal magma chambers, and possibly the deepening of mantle magma reservoirs.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"153 ","pages":"Pages 305-322"},"PeriodicalIF":7.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145893889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mercury anomalies in Paleozoic–Mesozoic strata of South China: Implications for global volcanism and mass extinctions","authors":"Minglong Li ,&nbsp;Liang Qiu ,&nbsp;Can Chen ,&nbsp;Keyuan Xu ,&nbsp;Haiyan Tan ,&nbsp;Deshun Zheng ,&nbsp;Xilin Fang","doi":"10.1016/j.gr.2025.11.018","DOIUrl":"10.1016/j.gr.2025.11.018","url":null,"abstract":"<div><div>Mercury (Hg) anomalies in sedimentary records have long served as proxies for historical volcanic activity. However, previous studies have focused mainly on large igneous provinces (LIPs) and mass extinctions. For identifying Hg anomalies, the residual Hg method is rigorous but requires extensive, high-quality data. The enrichment coefficient method (often normalized to total organic carbon (TOC)) is simpler but less accurate. Furthermore, due to insufficient constraints on long-term geological Hg background values, a unified threshold for defining anomalies remains lacking. The South China block (SCB), with relatively complete Cambrian to Jurassic sediments, holds records of numerous volcanic events. A total of 1010 carbonate samples, 749 clastic rock samples, and 272 black rock series samples from the Cambrian to Jurassic of the SCB were collected for Hg and TOC analyses. Using the interquartile range, we set the following background ranges for Hg concentrations: 6.0–22.4 ppb (carbonates) and 10.1–31.2 ppb (clastic rocks). When the TOC content was &lt; 0.2 %, the Hg concentration was used to describe the anomaly threshold, with values of 33.4 ppb (carbonates) and 47.1 ppb (clastic rocks). When the TOC content was ≥ 0.2 %, the Hg/TOC ratio was used, with threshold values of 166.9 ppb/% for carbonates, 235.7 ppb/% for clastic rocks, and 258.5 ppb/% for black rock series. Six significant Hg anomaly signals were identified in the Cambrian to Jurassic strata of the study area. These signals correspond to the Late Ordovician, Late Devonian, end-Guadalupian, end-Permian, end-Triassic, and early Toarcian mass extinction events, potentially reflecting responses to large-scale volcanism associated with the Alborz, Vilyui, Emeishan, Siberian, Central Atlantic Magmatic Province (CAMP) and Karoo-Ferrar LIPs. The intensities of the Hg anomaly signals were influenced by the TOC, silicate and sulfide components and the distance between the sedimentary basin and erupting volcanoes.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"153 ","pages":"Pages 1-16"},"PeriodicalIF":7.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145759820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Data-driven mining reveals a cross-temperature correlation between gold and tungsten: implications for magmatic controls in Carlin-type gold deposits","authors":"Biaobiao Zhu ,&nbsp;Yongzhang Zhou ,&nbsp;Changyu Zeng ,&nbsp;Xinhui Yu ,&nbsp;Zhengzhe Wang ,&nbsp;Shengtao Cao ,&nbsp;Pengpeng Yu","doi":"10.1016/j.gr.2025.12.001","DOIUrl":"10.1016/j.gr.2025.12.001","url":null,"abstract":"<div><div>Nevada (USA) and the Youjiang Basin (China) are the two largest Carlin-type gold provinces in the world, despite their distinct geological frameworks. The magmatic-hydrothermal model provides a credible explanation for Nevada’s deposits, but the apparent magmatic absence of magmatic rocks in the Youjiang Basin challenges it. To elucidate this enigmatic phenomenon, We integrated 2,210 catchment-derived stream-sediment samples from the Youjiang Basin with 54 lithogeochemical samples from Nevada’s Getchell district, and applied an innovative association-rule graph analysis method.Two findings are revealed: (1) The Au-As-Sb triad constitutes a diagnostic geochemical fingerprint for Carlin-type gold deposits. Metal enrichments (Cu, Mo, Co, Cr, Pb, Zn) exhibit strong co-precipitation with Au anomalies (support = 0.10, confidence = 0.90), indicative of element migration coupled with gold mineralization processes. (2) Topological coupling between low-temperature Au-As-Sb and high-temperature W anomalies is quantitatively established in both regions (support &gt; 0.20, confidence &gt; 0.90), implying a cross-temperature correlation. The magmatic-hydrothermal model can explain the Au-W correlation in Nevada. Thus, the correlation for the Youjiang may also imply a magmatic origin. This is evidenced by the following clues: Hg isotopes indicating a mixture of magmatic and basement-derived sources for Au, deep buried granite bodies temporally overlapping with gold mineralization. Combined with previous studies, we proposed a common magma-driven metallogenic model for Carlin-type deposits: The rising Au-W-bearing magmatic hydrothermal fluids mixed with the magmatically heated meteoric fluids that leached Au from the basement rocks, and subsequently precipitated Au-As-Sb-Hg-rich pyrite and W-bearing mineral assemblages within the carbonate host formations. In this context, the majority of gold is sourced from magmas for Nevada subtype and both of magmas and basement for the Youjiang subtype, respectively. This study highlights data-driven recognition of magmatic signature in sediment-hosted gold systems and establishes a new paradigm for the understanding of metallogenic architecture.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"153 ","pages":"Pages 253-264"},"PeriodicalIF":7.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145845303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improving rainfall-triggered landslide susceptibility mapping through source-area boundary sampling and multi- dimensional feature analysis","authors":"Haoxing Zhao,&nbsp;Qiang Xu,&nbsp;Wanlin Chen,&nbsp;Fanshu Xu,&nbsp;Dalei Peng,&nbsp;Chuanhao Pu,&nbsp;Ruiyang Liu,&nbsp;Yuyang Shen","doi":"10.1016/j.gr.2025.11.024","DOIUrl":"10.1016/j.gr.2025.11.024","url":null,"abstract":"<div><div>Accurate landslide susceptibility mapping (LSM) is critical for disaster risk assessment and mitigation, particularly in regions vulnerable to rainfall-induced slope failures. While sample selection is a key determinant of LSM accuracy, most existing approaches rely on landslide centroids or entire polygons due to resolution constraints. The potential advantages of boundary-based sampling within source areas remain largely unexplored. This study investigates the rainfall-triggered landslides that occurred in July 2013 in Tianshui City, China. Using high-resolution remote sensing and LiDAR data, we established a detailed inventory of landslides and their source areas. We developed a multi-dimensional LSM framework and introduced a novel Landslide Susceptibility Score (LSS), derived from the confusion matrix, to quantitatively assess the accuracy and practical reliability of susceptibility maps. The findings demonstrate that boundary sampling within source areas substantially enhances predictive performance. The Random Forest model achieved the best results (AUC = 0.960, F1 = 0.890, LSS = 37776), validating the methodological advantage of this sampling strategy. Furthermore, SHapley Additive exPlanations (SHAP) were employed to construct a multidimensional reasoning framework for landslide failure mechanisms, revealing the dominant roles of slope aspect, elevation, and surface roughness in modulating hydrological processes that drive slope instability. This research highlights the geotechnical and geomorphological significance of boundary-based source area sampling, establishing a robust methodological foundation for high-precision and automated LSM under extreme rainfall conditions. The proposed LSS further provides a comprehensive and scalable tool for evaluating susceptibility model performance in future studies.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"153 ","pages":"Pages 265-283"},"PeriodicalIF":7.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145823492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tracing paleoenvironmental change across the Permian-Triassic transition in Colorado","authors":"Mike J. Zawaski ,&nbsp;James W. Hagadorn ,&nbsp;Karen R. Whiteley ,&nbsp;Mark Longman ,&nbsp;Michael Yusas ,&nbsp;Bonita L. Lahey ,&nbsp;Alexandra A. Phillips ,&nbsp;Thomas J. Algeo ,&nbsp;Jun Shen ,&nbsp;János Haas ,&nbsp;Zhanhong Liu ,&nbsp;Stephen J. Mojzsis","doi":"10.1016/j.gr.2025.11.010","DOIUrl":"10.1016/j.gr.2025.11.010","url":null,"abstract":"<div><div>The Permian-Triassic Lykins Formation of Colorado contains thick redbeds and carbonates preserving information about environmental conditions in western Pangea. We investigated outcrops and drillcores through these epicontinental sedimentary facies to assess their record of environmental change using several proxies: δ¹³C_carb, δ¹⁸O_carb, carbonate-associated-sulfate (δ³⁴S_CAS), magnetic susceptibility, and major and trace element concentrations. The B/Ga and B_xs values of the carbonate units in the Lykins Formation suggest they precipitated from a predominantly marine water source, as do most of the carbonate cements in the redbeds of the succession. A portion of the unit’s carbon and sulfur isotopic signatures parallel the global geochemical record. Stromatolites are abundant in all the laterally extensive carbonates of the unit, but body and trace fossils are very rare. This biota suggests an expanse that was challenging for plant and animal life. This hostile setting comports with the assembly of Pangea and a climatic shift to hotter and drier conditions. An ongoing question for the end-Permian mass extinction is how Siberian Traps volcanism modulated global environmental change. There is no reliable indicator of the stratigraphic location of the end-Permian mass extinction in the Lykins Formation. Biostratigraphic and geochemical proxies suggest the unit’s Poudre Member may have been deposited during the Permian-Triassic transition. To facilitate assessment of this new epicontinental Permian-Triassic record, we assembled a dataset of trace elements spanning multiple Permian-Triassic boundary successions. We present a meta-analysis of these geochemical records to evaluate the sensitivity of trace elements as recorders of eruptions from this time. Few sections contain distinct elemental enrichments that could point to volcanic influences and those that do appear to have been downwind from the volcanic sources in Siberia.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"153 ","pages":"Pages 150-169"},"PeriodicalIF":7.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145759383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Three-dimensional crustal velocity and density structures around the eastern Central Asian orogenic belt and implications for the Solonker suture and metallogenic background","authors":"Lianghui Guo ,&nbsp;Yang Chen ,&nbsp;Mei Han ,&nbsp;Xueyang Bao","doi":"10.1016/j.gr.2025.11.017","DOIUrl":"10.1016/j.gr.2025.11.017","url":null,"abstract":"<div><div>Sandwiched by the Siberia and North China cratons, the eastern Central Asian orogenic belt (CAOB) is one of the ideal natural laboratories for studying Phanerozoic continental crust accretion, reworking and metallogenesis in the world. The Solonker suture has been commonly considered as the final Paleo-Asian Ocean closure and is crucial for understanding the tectonic formation and evolution of the eastern CAOB, but its eastern extension remains unknown in Northeast China due to thick cover of the Songliao Basin and a general lack of key geological markers. In addition, the deep metallogenic background of the Mesozoic polymetallic ore deposits in this area is still unclear and is in urgent need of high-resolution structure of crust and upper mantle. In this paper, we assemble seismic data from both permanent and portable seismic stations around the eastern CAOB along with the complete Bouguer gravity anomalies data, and then simultaneously construct the high-resolution 3-D <em>Vs</em> and density models of crust and uppermost mantle around this area by the full-waveform ambient noise and gravity joint inversion. Our <em>Vs</em> and density models reveal approximately symmetric features of velocity and density structures across the eastern CAOB, and suggest that the northern boundary of the Solonker suture extends eastward along the Xilinhot–Tonglu–Baicheng–Daqing line and the southern one is along the Linxi–Changling–Jilin line. Moreover, our <em>Vs</em> model illustrates that the Mesozoic polymetallic ore deposits in the southern Great Xing’an Range are mostly located around the overlay of the upper-crustal high-<em>Vs</em> values and the transition zones of Moho depression and uplift on the west of the NNE-trending Moho gradient belt. The Moho transition zone likely represents the deep crustal boundaries facilitating the ascent of ore-forming magmas and fluids from mantle into upper crust, and the overlay indicates the prospect areas for the future polymetallic mineral exploration.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"153 ","pages":"Pages 73-81"},"PeriodicalIF":7.2,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145731547","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}