Gondwana Research最新文献

{"title":"Is Net Zero 2050/2060 a sensible forward-looking pathway for human civilization? A geological long-term perspective","authors":"David I. Groves , M. Santosh , Daniel Müller","doi":"10.1016/j.gr.2025.04.006","DOIUrl":"10.1016/j.gr.2025.04.006","url":null,"abstract":"<div><div>Since formation of the IPCC, increasing concerns have been voiced about potential climate changes, particularly global warming, caused by anthropogenic CO<sub>2</sub> emissions. More extreme climate models projected by the media are suggested to cause future global catastrophes such as rapid sea level rise and increasing frequency of destructive weather events. Although no catastrophic predictions have eventuated, anxiety by global governments has led to introduction of incredibly expensive drastic measures to control these emissions through Net Zero 2050. This would mark phase one of an endless energy transition from fossil fuels to clean energy powered by wind turbines and solar panels and clean transport through battery-powered EVs. The dimensions and total cost of this multi-phase transition to serve an increasingly energy-hungry civilization are staggeringly high.</div><div>A key question is whether this decision to Implement Net Zero 2050 and beyond is achievable in future decades and centuries to maintain our civilization and massive population. From a geological standpoint, it is important to understand whether there are sufficient critical metals required to manufacture the machines to drive this energy transition. These non-renewable resources are locked up in heterogeneously distributed mineral deposits that formed over millions of years and are mined from less than 0.1% of the Earth’s surface. Although calculations are fraught with uncertainties, it is likely that known and expected near-mine additions to resources of most metals are sufficient to meet supply demands until 2050, but that demand will outstrip supply into the next century let alone in future multiple iterations. This is because mine closures are inevitable and any new discoveries, with at least a decade to reach production, are likely to have lower critical metal grades, require deeper mining, consume more energy, and introduce progressively greater environmental problems. They will become commercially non-renewable resources without intervention through development of a ’circular metals’ economy involving both resource renewal through exploration and metal retention through recycling at industrial scale. However, commercial recycling is in its infancy and the lack of assured critical metal supply to enable the clean energy transition represents an overlooked, potentially catastrophic, situation for the continuation of human civilization.</div><div>An empirical study of climate change throughout Earth and human history suggests that there has always been inexorable climate change that depends more on global tectonics and astronomical cycles than on atmospheric CO<sub>2</sub> levels. Sudden catastrophic interventions to gradual climate change are caused by major volcanic eruptions that initiate year-long volcanic winters through massive eruption of sulfate aerosols into the stratosphere. In these periods, power from solar panels would be literally obliterated. ","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"152 ","pages":"Pages 4-17"},"PeriodicalIF":7.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144083374","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":"A step toward sustainable development: Role of energy transition, eco-innovation and environmental policy stringency","authors":"Sunil Tiwari ,&nbsp;Arshian Sharif","doi":"10.1016/j.gr.2025.04.018","DOIUrl":"10.1016/j.gr.2025.04.018","url":null,"abstract":"<div><div>While minimizing environmental impacts and fostering economic growth, energy transition, eco-innovation and environmental policy stringency play crucial roles in the attainment of sustainable development. In this regard, present study aims to investigate the roles of energy transition, eco-innovation, environmental policy stringency and globalization in mitigating CO2 emission and fostering sustainable development. The Method of Moments Quantile Regression (MM-QR) approach is applied to panel data of BRICS countries from 2001 to 2022. Additionally, Fully Modified Ordinary Least Squares (FMOLS) and Dynamic Ordinary Least Squares (DOLS) statistical modules are also used to check the cointegration in panel datasets before applying MM-QR test. Results report the strong negative association between CO2 emission and energy transition, eco-innovation, environmental policy stringency from lower to higher quantiles. Conversely, globalization is negatively association with carbon emission across all quantiles. The study provides policy implications to BRICS nations for the sustainable development through energy transition supported by well-designed environmental policies and eco-innovation.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"152 ","pages":"Pages 129-141"},"PeriodicalIF":7.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144188947","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":"Towards a circular economy: Modern recycling technologies for critical metals","authors":"Daniel Müller ,&nbsp;David Ian Groves ,&nbsp;Liang Zhang","doi":"10.1016/j.gr.2025.05.009","DOIUrl":"10.1016/j.gr.2025.05.009","url":null,"abstract":"<div><div>Critical metals such as Li, V, Co, Ni, Ga, Ge, In, Sn, Te, PGE, REE, and W are essential components for the manufacture of solar panels, industrial magnets, wind and geothermal turbines, Li-ion batteries, electric vehicles, smartphones, and other high-tech gadgets. A stable supply chain for critical metal resources must depend on both mining, including metallurgy to liberate the metals, and recycling them from waste materials and expired clean-energy devices. However, the supply chain for critical metals is threatened by their natural scarcity, their heterogeneous geographical distribution and their current lack of substitution or recycling at acceptable cost. Addressing this global challenge requires: 1) the development of a circular economy involving the recovery and recycling of critical metals from all waste materials at an industrial scale; 2) the design of recyclable clean energy devices for future use; and 3) the application of improved mineral exploration technologies to replace existing critical metal resources with new discoveries. A review of available and novel recycling technologies for the recovery of critical metals from mining waste, high‐tech gadgets such as smartphones, and from existing clean energy devices such as solar panels, wind turbines and EV batteries shows that there are numerous methodologies that could be applied. However, despite development of very promising novel recycling technologies in general, and laboratory-based recycling methodologies for critical metals, more detailed research is required before they can be both economic with respect to competition from new metal sources and meet increasingly strict environmental regulations at the industrial scale.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"152 ","pages":"Pages 80-91"},"PeriodicalIF":7.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146102667","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":"The occurrence and characterization of lithium in different lithium-bearing clay minerals from bauxite sequences","authors":"Zhenxiao Wu ,&nbsp;Xudong Hao ,&nbsp;Hongfei Cheng","doi":"10.1016/j.gr.2025.12.002","DOIUrl":"10.1016/j.gr.2025.12.002","url":null,"abstract":"<div><div>The rare metal lithium (Li), a strategic critical resource, plays a vital role in low-carbon energy technologies, including mobile electronics and nuclear industries. In China, clay-type Li resources, particularly those associated with bauxite sequences in northern China, have gained significant attention due to their widespread distribution and potential role as Li reserves. In our study, three types of clay mineral samples, namely chlorite (Chl), illite (Ilt), and kaolinite (Kln), were collected from bauxite units in North China. The Chl sample (5926.22 μg/g) contained considerably higher Li content than Ilt (622.04 μg/g) and Kln (741.76 μg/g), indicating that chlorite is the primary carrier mineral for Li. The cation exchange experiment revealed that Li was mainly hosted in the lattices of clay minerals (chlorite, illite, and kaolinite). Subsequently, the original samples were subjected to sedimentation–separation treatment to obtain higher-purity clay mineral samples. These samples were fully characterized via spectroscopic techniques to investigate the occurrence sites of Li. Li was predominantly hosted in Chl (cookeite, 9876.64 μg/g), with minor amounts in Ilt (625.36 μg/g) and Kln (747.19 μg/g). Although Li in cookeite was mainly located in the interlayer hydroxide sheets, it occupied the octahedral sheets in illite and kaolinite. Additionally, Li played a crucial role in balancing the negative charges that resulted from the substitution of Si by Al in the tetrahedral sheets, highlighting the structural significance of Li in these clay minerals. These findings enhance the understanding of Li occurrence states in clay minerals and offer valuable information for the utilization of bauxite-associated type Li resources.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"152 ","pages":"Pages 259-271"},"PeriodicalIF":7.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145893882","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":"Flood detection using PolSAR decomposition, feature selection, and deep learning","authors":"Jinwook Lee ,&nbsp;Saeid Janizadeh ,&nbsp;Alexander Melancon ,&nbsp;Sayed M. Bateni ,&nbsp;Dongkyun Kim ,&nbsp;Andrew Molthan ,&nbsp;Changhyun Jun ,&nbsp;Ramin Farhadiani ,&nbsp;Saeid Homayouni ,&nbsp;Megersa Dinka","doi":"10.1016/j.gr.2025.06.022","DOIUrl":"10.1016/j.gr.2025.06.022","url":null,"abstract":"<div><div>Accurate identification of inundated areas is crucial for mitigating the impacts of flooding, which causes numerous casualties and significant economic losses. While polarimetric synthetic aperture radar (PolSAR) data have been utilized to detect inundated regions, the information contained within PolSAR features remains severely underutilized. We introduce a novel approach that involves extracting a large number of PolSAR features through various PolSAR decomposition techniques, selecting the most important ones using the decision tree–recursive feature elimination (DT-RFE) method, and ultimately detecting inundation using a convolutional neural network (CNN) model. The hybrid DT-RFE–CNN model was trained and tested over a region in southeastern North Carolina during Hurricane Florence on September 18, 2018, using PolSAR features derived from the Uninhabited Aerial Vehicle Synthetic Aperture Radar (UAVSAR). In terms of flood-mapping efficacy, the DT-RFE–CNN model outperformed a CNN model that used only PolSAR data across all metrics in both the training and testing stages. The performance of the trained DT-RFE–CNN model was evaluated by testing it over the same region for four more days (September 19, 20, 22, and 23, 2018); it achieved an average accuracy, precision, recall, F1 score, and intersection-over-union of 0.9304, 0.9089, 0.9584, 0.9324, and 0.8738, respectively, outperforming both the classical Otsu method and the FT-Transformer model using features selected by DT-RFE. Finally, we assessed the model’s generalizability by mapping another significant flood event, caused by Hurricane Harvey in Texas between August and September 2017. Based on the results, the hybrid model can accurately detect flooding, even in regions on which it has not been trained. Thus, the proposed method can facilitate flood monitoring and response efforts.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"152 ","pages":"Pages 212-233"},"PeriodicalIF":7.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144664735","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":"B–Li enrichment and isotopic signature of deep brines in the northern Tibetan Plateau: Evidence for Cenozoic depocenter shift and input of orogenic geothermal systems","authors":"Fukang Yang ,&nbsp;Guang Han ,&nbsp;Tong Pan ,&nbsp;Qishun Fan ,&nbsp;Haotian Yang ,&nbsp;Qingkuan Li ,&nbsp;Xiying Zhang","doi":"10.1016/j.gr.2025.08.001","DOIUrl":"10.1016/j.gr.2025.08.001","url":null,"abstract":"<div><div>The Indo–Asian collision has generated numerous anticlinal and folding structures in the central–western Qaidam Basin (QB), northern Tibetan Plateau (TP), hosting deep brine resources enriched in K, Li, B, Rb, and Cs. These brine resources exhibit Li–B concentrations far exceeding China’s minimum industrial mining grade (Li⁺: 49.5 mg/L; B³⁺: 310.5 mg/L), underscoring their significant potential for future development and exploitation. The genesis of Li and B enrichment in deep brines from individual anticline reservoirs has been well-documented, however, key questions regarding their spatial distribution, primary sources, and enrichment mechanisms across the entire QB remain unresolved. This study presents high-precision analyses of H–O–Li–B isotopes and hydrogeochemical parameters of deep brines, salt lake brines and river waters in the QB. Results reveal spatial heterogeneity in Li–B contents and δ¹¹B–δ⁷Li values of deep brines in the QB, subdividing the central-western region into four zones (Zone I–IV) based on Paleocene-Eocene and Pleistocene-Holocene depocenter positions. Peripheral QB regions (Lenghu, Eboliang, Gasi, Kunbei anticlines) show low B–Li enrichment (B: 1.14–370.90 mg/L; Li: 0.06–54.5 mg/L), while the western area (Nanyishan, Xiaoliangshan, Dafengshan, and other anticlines) exhibits high enrichment (B: 43.50–1301.10 mg/L; Li: 5.94–237.50 mg/L). Enrichment patterns are controlled by recharge sources, evaporation, lake basin migration, and clay mineral adsorption. Deep brines and Quaternary salt lake brines share similar B–Li recharge patterns and enrichment mechanisms, primarily involving geothermal waters as the main recharge source and evaporation as an enrichment process. Geochemical data indicate that deep brines exhibit high Na⁺ and Cl⁻ concentrations in Piper diagrams, along with significantly positive δ¹⁸O values in δD–δ¹⁸O diagrams, suggesting strong water–rock interactions or magmatic fluid contributions, particularly at the Dafengshan, Xiaoliangshan, and Nanyishan anticlines. The Li–B concentrations in deep brines show a decreasing trend from west to central areas, while δ¹¹B values increase progressively (+14.58 ‰ in Zone II, +24.16 ‰ in Zone III, +31.67 ‰ in Zone IV). In contrast, δ⁷Li values display an inconsistent pattern, likely influenced by mixing with shallow salt lake brines in Yahu and Jianshishan anticlines (Zone III). Importantly, the observed stepwise increase in δ¹¹B–δ⁷Li values in deep brines, attributed to clay mineral adsorption, aligns with the gradual migration of Paleogene–Neogene depocenters driven by surrounding orogenic belt uplift. These findings highlight spatial differentiation in B–Li enrichment, isotope heterogeneity, and metallogenic mechanisms within deep brines of the QB.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"152 ","pages":"Pages 32-45"},"PeriodicalIF":7.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144924003","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":"The role of vegetation in the formation of regolith-hosted REE deposits from granitic rocks: The mercury isotope perspective","authors":"Yuzhou Feng ,&nbsp;Runsheng Yin ,&nbsp;Yuanming Pan ,&nbsp;Bernd Lehmann ,&nbsp;Changzhou Deng ,&nbsp;Di Chen ,&nbsp;Bing Xiao ,&nbsp;Hui Zheng ,&nbsp;Huayong Chen","doi":"10.1016/j.gr.2025.10.002","DOIUrl":"10.1016/j.gr.2025.10.002","url":null,"abstract":"<div><div>Heavy rare earth elements (HREE) are critical materials for the transition to a low-carbon economy and are extracted dominantly from regolith-hosted ion adsorption REE deposits in the top part of weathered granites. Although vegetation is known to facilitate chemical weathering and the release of REE from granitic rocks, its role in forming regolith-hosted REE deposits is poorly studied. In this study we investigate Hg isotope compositions of two weathering profiles associated with regolith-hosted REE deposits formed on Mesozoic granites in South China, and observe distinctly negative Δ¹⁹⁹Hg values which decrease with depth (−0.77 to −0.16 ‰). The results fall in between estimates for vegetation (&lt;0‰) and bedrock (∼0‰), which enable us to quantify the fraction of vegetation-derived Hg (Hg_vegetation) across the regolith profile. The Hg_vegetation fractions are close to 100 % in the lateritic top layer (0 to ∼ 4 m) but decrease to ∼ 10 % at the base of the fully weathered zone. Enrichments of REE (267 to 3,145 ppm) are observed in intervals just below the top layer. Combined with total organic carbon (TOC), pH, and mineralogical analyses, we demonstrate that the vegetation induces acidic conditions in the organic-rich top layer, leading to release of its REE budget. The mobilized REE from the top layer migrate downward and are trapped in deeper layers by clay minerals under less acidic to near-neutral pH conditions, eventually forming regolith-hosted REE mineralization. This work confirms the crucial role of vegetation in generating regolith-hosted REE deposits as monitored by Hg isotopes.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"152 ","pages":"Pages 46-54"},"PeriodicalIF":7.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145397954","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":"The economic drivers of AI’s impact on renewable energy","authors":"Taner Akan","doi":"10.1016/j.gr.2025.09.004","DOIUrl":"10.1016/j.gr.2025.09.004","url":null,"abstract":"<div><div>Artificial intelligence is anticipated to make fundamental changes in the operation of economic systems. Can it have a similar impact on renewable energy consumption? This study examines this<!--> <!-->research question<!--> <!-->in terms of<!--> <!-->AI’s indirect impact on renewable energy through the mediation of key drivers of renewable energy in<!--> <!-->an economic system: firm profitability, firm value, firm competitiveness, and economic equality. The study analyzes not only the consistent (positive<!--> <!-->or negative) but also the inconsistent (dark) indirect effects of AI on renewable energy, as AI is currently being incorporated into production and energy systems. The study employs recently developed ‘Pattern Causality’ analysis to estimate these effects. It uses temporal network, quadruple wavelet, and quantile wavelet analyses for the robustness check of these estimations. The study yields three conclusions. First, AI exerts positive indirect effects of 0.27, 0.75, 1.20, and 0.37 on renewable energy in Germany, Sweden, the United States, and Canada, respectively. The inconsistent<!--> <!-->indirect impacts of AI are 0.06, 0.07, 0.02, and 0.07 for the corresponding countries, respectively. Second, the consistent and inconsistent<!--> <!-->impacts of AI are persistent over time, despite temporal fluctuations. Third, there are no significant disparities in the magnitudes of AI’s quartile effects (0.25, 0.50, and 0.75) on renewable energy sources. The results of the temporal network, quadruple wavelet, and quantile wavelet analyses for the robustness check validate the pattern causality estimations. The study provides pertinent policy recommendations to amplify AI’s positive indirect impacts on renewable energy and to convert its inconsistent and<!--> <!-->negative impacts<!--> <!-->into positive impacts with specific reference to the Sustainable Development Goals.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"152 ","pages":"Pages 234-258"},"PeriodicalIF":7.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145311723","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":"Land use and carbon stock changes in China: spatiotemporal evolution and forecasting analysis","authors":"Zhaoxu Zhang ,&nbsp;Xutong Li ,&nbsp;Sijia Du ,&nbsp;Cong Shi ,&nbsp;Zhenwei Shi ,&nbsp;Yuanheng Sun","doi":"10.1016/j.gr.2025.08.016","DOIUrl":"10.1016/j.gr.2025.08.016","url":null,"abstract":"<div><div>In response to global warming, food security, and other urgent challenges, examining the impact of land use changes is essential for China to effectively address these issues. By integrating carbon stock data with future land use projections, this approach can facilitate rational land planning, thereby balancing environmental protection with economic development. This study examined the changes in land use and carbon storage in China from 2005 to 2020 using MODIS data, and projected future trends. First, we analyzed the spatiotemporal patterns of land use change using methods including land use dynamics, land use change rate, land use change intensity, and transition matrix analysis. Next, we investigated the driving forces behind land use change by examining seven key factors: digital elevation model (DEM), gross domestic product (GDP), precipitation, population density, soil type, temperature, and distance to water. Finally, we utilized the InVEST model to quantify carbon storage and the PLUS model to simulate and predict land use under three scenarios for the year 2030: natural development (S1), economic development (S2), and cropland protection (S3). The key findings were as follows: (1) Land use changes in China were quantitatively analyzed using various parameters, and corresponding carbon stock changes were assessed, (2) Predictions for land use in 2030 under the three scenarios were generated, achieving a Kappa coefficient of 88.94%, and projected carbon stock changes were estimated based on these results, (3) Soil type and population density were identified as critical driving factors influencing land use changes from 2005 to 2020, and the effects of these changes on carbon stocks were thoroughly analyzed. These findings offer valuable insights for policy formulation and optimization of land use patterns in China. This research promotes ecosystem protection and restoration to enhance carbon sequestration, improves cropland policies to balance food security and carbon reduction, enables region-specific land management, and provides scientific guidance for adaptive land use strategies.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"152 ","pages":"Pages 195-211"},"PeriodicalIF":7.2,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145094067","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":"Cabeço de Vide Ophiolite: structure, age and correlation of an obducted marginal basin on the northern margin of Gondwana","authors":"Diana Moreno-Martín ,&nbsp;Rubén Díez Fernández ,&nbsp;Richard Albert ,&nbsp;Esther Rojo-Pérez ,&nbsp;Manuel Francisco Pereira ,&nbsp;Axel Gerdes ,&nbsp;Ricardo Arenas","doi":"10.1016/j.gr.2025.10.019","DOIUrl":"10.1016/j.gr.2025.10.019","url":null,"abstract":"<div><div>The Cabeço de Vide Ophiolite (SW Iberian Massif) offers new insights into the tectonic evolution of the North Africa Gondwana margin. This study presents petrological, structural, and geochronological evidence to reconstruct the Cadomian tectonic evolution of the Cabeço de Vide Ophiolite and discusses possible correlations. The Cabeço de Vide Massif experienced two Cadomian deformation phases (D_C1 and D_C2). Besteiros thrust (Besteiros Shear Zone) is attributed to D_C1, which obducted the Cabeço de Vide Ophiolite onto the Ediacaran series deposited along the Gondwana margin (top-to-E-NE emplacement). D_C2 produced a normal-sense ductile shear zone with top-to-the-SE kinematics (Cabeço de Vide Shear Zone). A cross-sectional data analysis combining geochronological evidence with U-Pb dating in calcite (marbles) and zircon (amphibolites, metagranites and metaconglomerates) constrains the age of D_C1 between ca. 623–523 Ma. The same analysis suggests a Cambrian age for D_C2, between ca. 523–512 Ma. The sequence, timing and kinematics of the major Cadomian structures in the study area align with those described in other sections of the Cadomian Orogen in Iberia, notably the Calzadilla Ophiolite. We propose a correlation between the Cabeço de Vide and Calzadilla ophiolites, which would emerge as two pieces of a single ophiolitic belt. This ophiolitic belt was probably obducted from a primary fore-arc basin setting inland onto Gondwana during the Cadomian Orogeny. The thrusting of the late Ediacaran ophiolites was followed by the collapse of the arc system, which was accommodated by the development of ductile extensional shear zones during the Cambrian (D_C2), accompanied by uplifting, erosion and magmatism.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"151 ","pages":"Pages 189-205"},"PeriodicalIF":7.2,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145553685","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}