Gondwana Research最新文献

{"title":"Sedimentary provenance analysis by coupled detrital zircon U-Pb, Hf isotopes of the Paleoproterozoic Belcher Group, Nunavut, Canada and implications for sedimentation during the opening and closure of the Manikewan Ocean","authors":"Brayden S. McDonald,&nbsp;Camille A. Partin","doi":"10.1016/j.gr.2025.01.004","DOIUrl":"10.1016/j.gr.2025.01.004","url":null,"abstract":"<div><div>Coupled detrital zircon U-Pb, Hf isotopic data from the Paleoproterozoic Belcher Group, Nunavut, Canada, are presented to determine maximum depositional ages and sedimentary provenance. We use these data to evaluate potential sediment sources with matching ages and εHf values within a paleogeographic context, to better define the configuration of microcontinents, terranes, and cratons surrounding the Belcher basin during its deposition. The distribution of detrital zircon spectra show that the lower Belcher Group was deposited on the passive margin of the Superior craton, whereas the upper Belcher Group (Omarolluk and Loaf formations) was deposited in <em>syn</em>-orogenic phase, broadly reflecting the opening and closing stages of the Manikewan Ocean, respectively. The lower Belcher Group data show dominant detrital zircon populations between 2825 and 2690 Ma (associated with negative εHf values) with only minor detrital input from sources &lt; 2100 Ma. The dominant grain population is interpreted to be derived from the northeastern Superior craton (&gt;2680 Ma grains), and the Winnipeg River and North Caribou terranes (&lt;2680 Ma grains). The upper Belcher Group shows a dramatic shift in detrital ages from Archean to dominantly Paleoproterozoic, with dominant age peaks between ca. 1920 and 1900 Ma and only minor Archean input that includes 2500 Ma sources that are absent in the lower units. Archean populations document Sask craton-like ages and εHf values, whereas the dominant detrital 1920 to 1900 Ma age population shows positive εHf values that are consistent with being sourced from terranes located in the western Reindeer zone deposited in a submarine fan.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"140 ","pages":"Pages 17-33"},"PeriodicalIF":7.2,"publicationDate":"2025-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142975610","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Spatiotemporal variations of Early to Middle Paleozoic magmatism in northern Beishan: Implications for accretionary and collisional processes in the southern Central Asian Orogenic belt","authors":"Runwu Li ,&nbsp;Ying Tong ,&nbsp;Shangguo Su ,&nbsp;Victor P. Kovach ,&nbsp;Olga V. Yakubovich","doi":"10.1016/j.gr.2024.12.009","DOIUrl":"10.1016/j.gr.2024.12.009","url":null,"abstract":"<div><div>Spatiotemporal variations in magmatic compositions reflect changes in magma sources and their formation conditions, offering insights into geodynamic processes. This study presents new zircon U–Pb and geochemical data for early–mid Paleozoic granitoids in northern Beishan, located within the southern Central Asian Orogenic Belt. Late Ordovician (451 Ma) granodiorites are I-type and formed through water-fluxed melting of amphibolites. Early Devonian (403–397 Ma) granites show I-, S-, and A-type affinities with enriched Sr–Nd isotopes, indicating ancient crustal sources. Late Devonian to early Carboniferous (366–357 Ma) granitoids exhibit I-type characteristics. They and coeval intermediate-felsic intrusives show similar Sr–Nd–Hf isotopes, with ⁸⁷Sr/⁸⁶Sr_(i) from 0.7045 to 0.7075, ε_Nd(t) from −2.93–0.92, and zircon ε_Hf(t) predominantly ranging from 2.9 to 6.5. Geochemical studies suggest their derivation from metasomatized mantle, with fractional crystallization playing a key role. Available data reveal three magmatic stages: ∼500–420 Ma, ∼420–390 Ma, and ∼ 370–350 Ma. Stage I mainly consists of (quartz) diorites, granodiorites, and granites. They show increasing K₂O/Na₂O and zircon saturation temperatures from south to north, with the Hanshan unit characterized by A-type granites. These variations reflect northward subduction of the Beishan Ocean, leading to water-fluxed crustal melting in the Mazongshan arc and dehydration melting in the Hanshan back-arc. In Stage II, complex mafic–felsic rock associations composed of (quartz) diorites, high-silica granites, gabbros, and intermediate–mafic volcanic rocks, along with high temperatures required for S- and A-type granite formation, suggest increased mantle heat input from slab breakoff following Beishan Ocean closure. Stage III rocks, confined to the Mazongshan unit, consist of diorites, tonalites, granodiorites, and granites associated with southward subduction of the Jijitaizi–Xiaohuangshan Ocean. This study demonstrates that multistage subduction–accretion contributed to Beishan orogen formation, highlighting magmatic compositional variations as key to understanding accretionary orogens.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"140 ","pages":"Pages 60-80"},"PeriodicalIF":7.2,"publicationDate":"2025-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142975609","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":"Coupling of shallow marine redox change and multi-stage animal radiations during the early Cambrian","authors":"Yanhong Zheng ,&nbsp;Chao Chang ,&nbsp;Jiahao Li ,&nbsp;Yi Ding ,&nbsp;Xiaotong Tang ,&nbsp;Jianni Liu","doi":"10.1016/j.gr.2025.01.003","DOIUrl":"10.1016/j.gr.2025.01.003","url":null,"abstract":"<div><div>Marine redox variations are widely accepted as an environmental driver for the Cambrian explosion, yet relative changes in shallow marine dissolved oxygen levels during the Ediacaran–Cambrian transition have long remained unconstrained. Here we present compiled nitrogen and organic carbon isotope data from shallow-water deposits in four sections, including new record from the Meishucun and Zhujiaqing sections, on the Yangtze Platform. The results reveal that nitrogenous environments with active denitrification prevailed in shallow ocean during the Terreneuvian, which may have been sufficient only for ecological successes of lophotrochozoans with relatively low O₂ demands. In contrast, the diversification of ecdysozoans and deuterostomes with higher O₂ demands was possibly suppressed and delayed until a rise of dissolved oxygen concentrations during the Cambrian Age 3. Our findings provide crucial support for a causal link between marine oxygen availability and rapid diversification of metazoans during the Cambrian explosion.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"140 ","pages":"Pages 50-59"},"PeriodicalIF":7.2,"publicationDate":"2025-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142975611","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":"Xenoliths reveal East Gondwanan basement to Heard Island, Central Kerguelen Plateau","authors":"Jeremy L. Asimus ,&nbsp;Jacqueline A. Halpin ,&nbsp;Trevor J. Falloon ,&nbsp;Nathan R. Daczko ,&nbsp;Joanne M. Whittaker ,&nbsp;Jodi M. Fox ,&nbsp;Ivan Belousov","doi":"10.1016/j.gr.2025.01.002","DOIUrl":"10.1016/j.gr.2025.01.002","url":null,"abstract":"<div><div>Increasingly it is recognised that the breakup of East Gondwana and formation of the Indian Ocean has led to the creation of many microcontinents, including Elan Bank, Gulden Draak Rise, and Batavia Rise. Whether the central and southern sections of the Kerguelen Plateau contain additional Gondwanan microcontinents remains controversial. Continental crust residing in these regions is mainly inferred from geochemical and geophysical datasets but little to no direct sampling evidence corroborates this. Here, we characterise continental rocks trawled from banks and plateaus on the Central Kerguelen Plateau, using petrographic techniques and U-Pb zircon and apatite dating. Recovered granitoids and felsic gneisses have Paleoarchean (∼3.3 Ga) and Mesoproterozoic (∼1.44 Ga, ∼1.19 Ga) zircon U-Pb crystallisation ages, as well as Mesoproterozoic (∼1.6 Ga, 1.15 Ga) and Cambrian (∼0.5 Ga) apatite U-Pb cooling ages. We interpret a microcontinent resides in the Central Kerguelen Plateau and must underly Heard Island, based on: (1) correlation of the U-Pb age groups of the recovered granitoid/gneissic rocks with conjugate Indian crust within East Gondwana, (2) regional geochemical and geophysical evidence for widely distributed microcontinental crust in the Kerguelen Plateau and (3) strong evidence supporting a local origin for the recovered rocks versus an ice-rafted Antarctic origin. Based on a volcanic rim preserved on a gneissic sample, we interpret portions of the Central Kerguelen Plateau microcontinent were entrained as xenoliths during the recent volcanic eruptions associated with Heard Island. A ridge jump of the Southeast Indian Ridge between 115–102 Ma likely formed the Central Kerguelen Plateau microcontinent and we speculate that related ridge jumps formed a near continuous ribbon of microcontinents along the Indian margin during the breakup of East Gondwana.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"140 ","pages":"Pages 1-16"},"PeriodicalIF":7.2,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142975612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 novel panel of European economies pursuing carbon neutrality: Do current climate technology and renewable energy practices really pass through the prism of sustainable development?","authors":"Abdullah Emre Caglar ,&nbsp;Muhammet Daştan ,&nbsp;Zahoor Ahmed ,&nbsp;Mehmet Mert ,&nbsp;Salih Bortecine Avci","doi":"10.1016/j.gr.2025.01.001","DOIUrl":"10.1016/j.gr.2025.01.001","url":null,"abstract":"<div><div>Given the European Union’s initiatives to embrace cutting-edge technologies and transition to greener energy sources, it is imperative to assess the influence of climate technology and renewable energy utilization on the environmental sustainability of its member states. This study contributes to the existing body of literature by undertaking a novel assessment of the implications of climate technology and renewable energy consumption on load capacity factor, one of the most encompassing environmental sustainability indicators. To this end, the study examines data from 1990 to 2021 employing the “<em>Continuously Updated Fully Modified</em>” (Cup-FM) and “<em>Continuously Updated and Bias-Corrected</em>” (Cup-BC) approaches, concentrating on the five most attractive European Union countries for renewable energy: Germany, France, Spain, the Netherlands, and Denmark. The paper also considers the ecological impacts of economic growth, foreign direct investment, and urbanization. The results reveal a negative relationship between climate technology and ecological quality. While renewable energy consumption exhibits a positive but statistically insignificant association with ecological well-being, economic growth, foreign direct investment, and urbanization are found to have detrimental effects on ecological quality. In opposition to widely held claims, these striking observations suggest that renewable energy consumption and climate technology are not yet well equipped to fight the global climate battle. The underlying reasons behind these outcomes are thoroughly discussed, and strategies targeting Sustainable Development Goals 7 and 13 are proposed to catalyze advancements in research and development of cleaner energy and green technologies for a sustainable future.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"139 ","pages":"Pages 260-271"},"PeriodicalIF":7.2,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142975628","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":"Editorial Board (IFC)","authors":"","doi":"10.1016/S1342-937X(24)00317-4","DOIUrl":"10.1016/S1342-937X(24)00317-4","url":null,"abstract":"","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"137 ","pages":"Page IFC"},"PeriodicalIF":7.2,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143139801","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":"Impact of adaptation technologies and green energy on environmental quality: Evidence from G8 economies","authors":"Khatib Ahmad Khan ,&nbsp;Afshan Hamid ,&nbsp;Arshian Sharif ,&nbsp;Qasim Raza Syed ,&nbsp;Ahsan Anwar","doi":"10.1016/j.gr.2024.11.016","DOIUrl":"10.1016/j.gr.2024.11.016","url":null,"abstract":"<div><div>The current era calls for an urgent need for environmental protection, and adaptation technologies stand as forerunners of innovations, putting transformative solutions to cope with the issues relating to the environment. Moreover, the imperative to adapt to frequently changing climate is at the heart of sustainable development goals. Understanding the dire need for adaptation technologies as an essential tool for building resilience and enhancing the load capacity factor to raise environmental quality, the present study focuses on the group of eight (G8) industrialized countries over the period from 1990 to 2020, to explore the role of adaptation technologies (ATEC) and green energy (REC) on the environmental quality (LCF). The empirical outcomes generated through Panel Quantile Regression (PQR) verify the existence of the LCC hypothesis in highly industrialized economies. The results show that ATEC positively and significantly affects LCF with an increasing rate from middle to upper quantiles. In contrast, REC has continuously an increasing impact throughout the quantiles with high significance. The robust outcomes are also endorsed by employing Fully Modified Ordinary Least Squares (FMOLS) and Dynamic Ordinary Least Squares (DOLS). The study takes into consideration several Sustainable Development Goals (SDGs) like SDG 09 (adoption of technologies), SDG 07(green energy and renewable energy consumption), SDG 13 (climate action), SDG 14 (life below water), SDG 15 (life on land), SDG 03 (good health and well-being), SDG 06 (clean water and sanitation), SDG 11 (sustainable cities and communities), SDG 12 (responsible consumption and production), and SDG 17 (partnership for goals) while formulating policy implications, particularly for G8 economies.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"139 ","pages":"Pages 230-242"},"PeriodicalIF":7.2,"publicationDate":"2024-12-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142935472","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":"Is energy security the missing piece of the environmental puzzle? Fresh evidence from load capacity factor and ecological footprint indicators","authors":"Tunahan Degirmenci ,&nbsp;Oguzhan Bozatli ,&nbsp;Mucahit Aydin ,&nbsp;Daniel Balsalobre-Lorente","doi":"10.1016/j.gr.2024.11.015","DOIUrl":"10.1016/j.gr.2024.11.015","url":null,"abstract":"<div><div>Despite their great potential, low-carbon energies can be used in limited amounts. Energy R&amp;D expenditures can ensure that low-carbon energies are used at a rate close to their potential by increasing energy efficiency and reducing losses during the production and consumption phases. The positive environmental impacts of low-carbon energy and energy R&amp;D expenditures can be accelerated by political globalization. As an example of political globalization, the Kyoto Protocol has enabled the adoption of clean technologies and low-carbon energies by providing various obligations to many countries, especially developed countries. Although some countries have withdrawn from the obligations embodied in the protocol, they are taking measures to ensure environmental sustainability through individual efforts in their own interests. The USA is the example that best reflects this. The environmental impact of energy security may vary depending on the energy sources that provide affordable and accessible energy. This study examines the effects of energy R&amp;D expenditures, political globalization, energy security, and low-carbon energy consumption on the USA’s load capacity factor and ecological footprint from 1980 to 2018 using Fourier-based FMOLS and CCR estimators. The robust results of this study show that low-carbon energy consumption, energy technology R&amp;D expenditures, and political globalization increase environmental sustainability. Policymakers should allocate more resources to developing low-carbon energy sources, increasing energy efficiency, and encouraging the adoption of clean energy technologies.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"139 ","pages":"Pages 221-229"},"PeriodicalIF":7.2,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142905673","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":"Corrigendum to “Contrasting physical erosion rates in cratonic catchments: The Ogooué and Mbei rivers, Western Central Africa” [Gondwana Res. 138 (2025) 192–209]","authors":"V. Regard ,&nbsp;S. Carretier ,&nbsp;J.-S. Moquet ,&nbsp;S. Choy ,&nbsp;P.-H. Blard ,&nbsp;S. Bogning ,&nbsp;A.P. Mbonda ,&nbsp;E. Mambela ,&nbsp;M.C. Paiz ,&nbsp;M. Séranne ,&nbsp;J. Charreau ,&nbsp;D. Rouby ,&nbsp;J. Bouchez ,&nbsp;J. Gaillardet ,&nbsp;J.-J. Braun ,&nbsp;Y. Denèle","doi":"10.1016/j.gr.2024.12.004","DOIUrl":"10.1016/j.gr.2024.12.004","url":null,"abstract":"","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"140 ","pages":"Page 158"},"PeriodicalIF":7.2,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143175453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Arc sections correlation along the Gondwana margin: Dynamic shifts tracked by detrital zircon","authors":"Esther Rojo-Pérez ,&nbsp;Javier Fernández-Suárez ,&nbsp;José M. Fuenlabrada ,&nbsp;Richard Albert ,&nbsp;Rubén Díez Fernández ,&nbsp;Sonia Sánchez Martínez ,&nbsp;Irene Novo-Fernández ,&nbsp;Diana Moreno-Martín ,&nbsp;Axel Gerdes ,&nbsp;Ricardo Arenas","doi":"10.1016/j.gr.2024.12.007","DOIUrl":"10.1016/j.gr.2024.12.007","url":null,"abstract":"<div><div>Sections of the Gondwana margin recording the evolution of Ediacaran and Cambrian arc systems are preserved along the Variscan Orogen. The sedimentary sequences deposited in it and associated with its activity can provide significant keys to understanding the dynamics of the margin. In this sense, sections of the Gondwana margin that include arc magmatism between c. 602 and 500 Ma are well preserved in the SW and NW Iberian Massif. However, the activity in these areas was not synchronous, and the potential connection between both sectors along the Gondwana margin and its meaning is still poorly understood. U-Pb geochronology performed on detrital zircon grains of the Ediacaran Serie Negra Group (SW Iberia) show a maximum depositional age between 619 and 559 Ma for its Montemolín and Tentudía formations, respectively. The obtained Hf data from the same zircon grains supports significant crustal input. Meanwhile, U-Pb performed on detrital zircon grains of the Cambrian Betanzos Unit (NW Iberia) exhibit essentially mantle-derived Hf signature at 544–537 Ma (Maximum Depositional Age). Based on these data, a dynamic model for the Gondwana margin at c. 500 Ma has been proposed, comparable to the current processes operating on the Pacific edge of the North American plate. This model highlights a spatial and temporal connection between the Gondwana margin’s peripheral sections (SW and NW Iberia).</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"139 ","pages":"Pages 272-283"},"PeriodicalIF":7.2,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143133359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}