Gondwana Research最新文献

{"title":"Probing environmental sustainability aspects of resource efficiency, renewable energy usage and globalization","authors":"Oktay Özkan ,&nbsp;Hephzibah Onyeje Obekpa ,&nbsp;Stephen Taiwo Onifade ,&nbsp;Andrew Adewale Alola","doi":"10.1016/j.gr.2024.10.016","DOIUrl":"10.1016/j.gr.2024.10.016","url":null,"abstract":"<div><div>Given the pace of economic expansion arising from energy usage among other social and economic factors, emerging economies such as Turkey are increasingly becoming the focus for a net zero future. Therefore, the current attempt considers the drivers of environmental sustainability via load capacity factor (LCF) in the context of resource efficiency, renewable energy utilization, and globalization for Turkey over the period 1982 to 2019. By employing series of empirical tools that include cross-quantilogram method, quantile-on-quantile regression, quantile regression approaches, and the nonparametric quantile Granger causality approach, the result shows there is statistically significant evidence of quantile-to-quantile dependence among the trio of (resource efficiency, renewable energy utilization, and globalization) and LCF such that the dependence it reflects some levels of positive directional predictability, thus showing that these indicators are important drivers of environmental sustainability in Turkey. Furthermore, for the quantile-on-quantile regression results, there are statistically significant and positive effects of (i) resource efficiency on LCF across its conditional quantiles of distribution, (ii) renewable energy utilization on LCF and is mostly visible at the lower quantile up to the upper middle quantiles of renewable energy utilization (0.05–0.65), and (iii) globalization on LCF across the lower to upper middle quantiles. With the other empirical approaches providing similar results, the outcome of this investigation offers specific policy insight into resource circularity and energy efficiency.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"139 ","pages":"Pages 16-31"},"PeriodicalIF":7.2,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142797878","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":"Glacial fluctuations in the Cryogenian Marinoan Snowball Earth","authors":"Gang Wang ,&nbsp;Kun Zhao ,&nbsp;Jingxuan Zhang ,&nbsp;Shengxian Zhu ,&nbsp;Chaochao Xing ,&nbsp;Xianguo Lang","doi":"10.1016/j.gr.2024.10.015","DOIUrl":"10.1016/j.gr.2024.10.015","url":null,"abstract":"<div><div>The Marinoan glaciation represents the pinnacle of glacial severity in Earth’s geological history. Deep-water glacial deposits have revealed a complex interplay of at least two glacial advance-retreat cycles. However, the extent to which these glacial episodes are mirrored in shallow-water settings has received less attention. To shed light on this, we undertook an exhaustive lithofacies analysis of three shallow-water sections within the Nantuo Formation in South China. Our findings delineate six distinct lithofacies within the Nantuo Formation: massive diamictite, crudely stratified diamictite, pebbly sandstone, massive sandstone, dropstone-bearing laminated siltstone/mudstone, and laminated mudstone/siltstone. The vertical successions of these lithofacies have allowed us to identify two facies associations indicative of glacial dynamics; they are the ice-grounding line fan facies association and the ice-distal facies association. By juxtaposing our findings with the facies analysis of three deep-water sections, we have established a lateral correlation, confirming the presence of at least two glacial advance and retreat cycles in shallow-water environments. Each glacial advance is marked by the presence of inversely graded massive diamictite, indicative of ice-proximal, glaciomarine conditions. In contrast, each retreat phase is characterized by a fining-upward sequence from siltstone to mudstone, interspersed with dropstones, signifying ice-distal, glaciomarine settings. This study not only underscores the dynamic character of the Marinoan snowball Earth glaciation but also suggests that the glacial oscillations observed in deep-water environments have counterparts in shallow waters. It provides evidence that the scale of the Marinoan glacial fluctuations was not confined to the deep ocean but extended to encompass the entire basin, offering a more comprehensive understanding of the Earth’s climatic and glacial history during this critical period.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"139 ","pages":"Pages 1-15"},"PeriodicalIF":7.2,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142756902","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":"New Swartpuntia occurrence found within the Aar Member","authors":"Brandt M. Gibson ,&nbsp;Ingrid Stengel ,&nbsp;Zakeus Nghishidulu ,&nbsp;Peter R. Liberty ,&nbsp;Ajani Bissick ,&nbsp;Andrea Boscaini ,&nbsp;Joshua H.F.L. Davies ,&nbsp;Galen P. Halverson ,&nbsp;Frederick J. Hilgen ,&nbsp;Bianca Spiering ,&nbsp;Patricia Vickers-Rich ,&nbsp;Marc Laflamme","doi":"10.1016/j.gr.2024.11.002","DOIUrl":"10.1016/j.gr.2024.11.002","url":null,"abstract":"<div><div>A new occurrence of <em>Swartpuntia germsi</em> is reported from Farm Aar near Aus in southern Namibia. It is preserved as incomplete part/counterpart in two dimensions, with a folded petaloid. Stratigraphically correlated to a minimum depositional age of 547.32 ± 0.31 Ma, this represents the oldest global occurrence of <em>Swartpuntia</em> and documents a unique style of preservation within the Nama Group. Lastly, the occurrence increases the taxonomic and ecological diversity preserved at Farm Aar, making Farm Aar one of the only locations to preserve all common forms of Erniettomorph taxa.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"138 ","pages":"Pages 186-191"},"PeriodicalIF":7.2,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700642","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":"Constraining the extent of Greater India: New late Paleocene paleomagnetic data from the Tethyan Himalaya, Tibetan Plateau","authors":"Yong Cao ,&nbsp;Zhiming Sun ,&nbsp;Zhenyu Yang ,&nbsp;Haibing Li ,&nbsp;Junling Pei ,&nbsp;Xiaozhou Ye ,&nbsp;Xinwen Cao ,&nbsp;Bailing Wu ,&nbsp;Chenguang Liu ,&nbsp;Lei Zhang","doi":"10.1016/j.gr.2024.11.004","DOIUrl":"10.1016/j.gr.2024.11.004","url":null,"abstract":"<div><div>The collision of India and Asia formed the Himalayas and caused the uplift of the Tibetan Plateau. Greater India comprises the part of the Indian plate that was subducted beneath Asia and the Tethyan Himalaya. Quantitative constraints on the extent of Greater India are needed to study the process of the India-Asia collision. However, such constraints are lacking and the topic remains debated. We present paleomagnetic data from late Paleocene (∼58 Ma) mafic rocks from the western Tethyan Himalaya. The mean paleomagnetic direction is <em>Ds</em>/<em>Is</em> = 348.5°/+6.5° with <em>k</em> = 38.7 and <em>a₉₅</em> = 5.2°, which passed the fold, reversals, and paleosecular variation tests. The results define the paleolatitude of the Tethyan Himalaya as 3.3 ± 4.5°N at ∼ 58 Ma for the reference site of 29.9°N/83.3°E. A comparison of the Paleogene paleolatitudes of the Tethyan Himalaya shows that the terrane moved northward by 1540 ± 290 km between ∼ 60 Ma and ∼ 50 Ma, with a rate of movement of 15.4 ± 2 cm/yr. The new paleomagnetic result confirms that the extent of Greater India was 1130 ± 400 km and was essentially uniform from east to west. This finding implies that the collision between India and Asia was nearly be quasi-synchronous from the middle-eastern to western segments along the Indus-Tsangpo suture zone.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"138 ","pages":"Pages 128-138"},"PeriodicalIF":7.2,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658923","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":"Early Devonian stylonurine eurypterids from northern Gondwana: Late Lochkovian to early Pragian records from South China","authors":"Zhiheng Ma ,&nbsp;James C. Lamsdell ,&nbsp;Maxwell Wang ,&nbsp;Jingwen Chen ,&nbsp;Paul A. Selden ,&nbsp;Ben He","doi":"10.1016/j.gr.2024.11.003","DOIUrl":"10.1016/j.gr.2024.11.003","url":null,"abstract":"<div><div>This paper describes a new stylonurine eurypterid: <em>Qujingopterus spineus</em> gen. et sp. nov., from the Early Devonian (late Lochkovian to early Pragian) Xitun formation of Yunnan Province, South China. This discovery represents one of the earliest stylonurine records from Gondwana and further supports the global distribution of stylonurines. Considering the probable region of origin of the clade and and their lack of anatomical structures adapted for swimming, we propose that stylonurines migrated to Gondwana as the Rheic Ocean dwindled while Gondwana rapidly approached Laurussia. An additional specimen from this locality is described, and can be assigned to the eurypterine family Pterygotidae. Based on the environmental analysis, it can be inferred that the eurypterids from South China underwent adaptations to cope with decreasing salinity levels. This discovery provides valuable insights into the timing and mechanisms underlying eurypterid invasion into freshwater ecosystems.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"138 ","pages":"Pages 118-127"},"PeriodicalIF":7.2,"publicationDate":"2024-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658924","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":"Scrutinizing the load capacity curve for a global perspective: The role of Fintech, government effectiveness and renewable energy","authors":"Ugur Korkut Pata ,&nbsp;Kamel Si Mohammed ,&nbsp;Cheloufi Omeyr ,&nbsp;Selin Karlilar Pata ,&nbsp;Hind Alofaysan ,&nbsp;Mustafa Tevfik Kartal","doi":"10.1016/j.gr.2024.10.014","DOIUrl":"10.1016/j.gr.2024.10.014","url":null,"abstract":"<div><div>With the evolving world order, countries are using financial technologies (Fintech) to access financial resources more effectively, and Fintech can have an impact on the environment. This study aims to investigate the influence of Fintech on ecological sustainability, focusing on the contribution of renewable energy (RE) and government effectiveness (GE) under the Load Capacity Curve (LCC). This research analyzes data from 69 middle-income economies between 2006 and 2022 using the dynamic panel threshold model (DPTR). The outcomes document that GDP reduces the LCF below a certain threshold, but a positive impact above this threshold. Specifically, the model yielded a threshold value of $US 5222.234, which is higher than the average GDP of $US 4276.802. This finding suggests a U-shaped relationship between GDP and LCF, which supports the LCC hypothesis. The outcome also reports that Fintech plays a crucial role in improving ecological sustainability, while government effectiveness has a negative effect. The study emphasizes that middle-income countries should support Fintech and renewable energy along development with economic progress to improve ecological quality.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"138 ","pages":"Pages 104-117"},"PeriodicalIF":7.2,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658922","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":"Contrasting physical erosion rates in cratonic catchments: The Ogooué and Mbei rivers, Western Central Africa","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.2024.10.013","DOIUrl":"10.1016/j.gr.2024.10.013","url":null,"abstract":"<div><div>We measured the long-term physical denudation of the Ogooué River catchment using ¹⁰Be produced in situ by cosmic rays. These measurements are averaged over 25–200 ka (average 40 ka), depending on the physical denudation rate. The denudation rate of the Ogooué River catchment is slow (38 t/km²/a, 15<!--> <!-->m/Ma), slightly higher than in Equatorial West Africa (from Senegal to Angola, 26 t/km²/a, 10<!--> <!-->m/Ma). Physical denudation and chemical weathering fall within the same order of magnitude. Thus, although low, there is substantial chemical weathering compared to physical denudation, that likely contributes over 30 % of the total denudation.</div><div>Denudation rates are spatially variable (from 10 to 60 t/km²/a) within the large Ogooué River catchment. Over the long term, physical denudation and chemical weathering roughly match, except in the Batéké Plateaux area, because the plateaus are made up of already weathered detrital material and therefore their modern flux of solutes is very low (∼9.5 t/km²/a). The spatial distribution is similar to the one described in the work of <span><span>Moquet et al. (2021)</span></span> on the basis of solute fluxes, i.e. the southern part of the catchment is denuding twice as fast as the northern part. We show here that the whole picture did not vary much since 100 ka, as shown by both methods which give consistent results. Faster denudation in the southern part of the catchment may be related to more uplift than in the northern part caused by the southern African “superswell”.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"138 ","pages":"Pages 192-209"},"PeriodicalIF":7.2,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700645","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":"Crustal thickening, exhumation and metamorphic cooling of Neoproterozoic eclogites in NE Brazil: Timescale for the assembly of West Gondwana","authors":"Alanielson Ferreira ,&nbsp;Gary Stevens ,&nbsp;Elton L. Dantas ,&nbsp;Reinhardt A. Fuck ,&nbsp;Ticiano J.S. dos Santos","doi":"10.1016/j.gr.2024.11.001","DOIUrl":"10.1016/j.gr.2024.11.001","url":null,"abstract":"<div><div>The high-pressure followed by high-temperature metamorphism related to the evolution of collisional orogens is the expected Pressure-Temperature-time (P-T-t) path for modern-style plate tectonics. However, these P-T-t paths are rarely preserved even in Phanerozoic orogens. In this matter, the Campo Grande migmatite-gneiss area presents an exhumed Archean crust with heterogeneous retrograde eclogites overprinted by amphibolite-facies in NE Brazil. Retrogressed eclogites in the area core are formed by Mn-rich garnet + clinopyroxene porphyroblasts layer with a minor amphibole + quartz + titanite assemblage, whereas the margins display dismembered lenses of Mg-rich garnet porphyroblasts with plagioclase + amphibole coronae and clinopyroxene + plagioclase + ortopyroxene sympleticte mainly within shear zones. Phase equilibria modelling reveals that these distinct <em>retro</em>-eclogites record similar eclogite conditions (up to 18 kbar and 660 ± 20 °C). Mn-rich eclogites display widespread magmatic zoned zircon grains from Mesoarchean to Paleoproterozoic and recrystallized metamorphic grains of 607.7 ± 5.4 Ma. Zircon from Mg-rich eclogites crystallized at 2.67 Ga and overgrowth rims formed at 2.0 Ga and 590.1 ± 1.8 Ma. REE in zircon lack Eu anomaly, displaying flat HREE patterns in 590.1 ± 1.8 Ma Neoproterozoic grains indicate recrystallization under eclogite-facies conditions. In situ U-Pb titanite dating yielded two younger age sets at 574.7 ± 0.5 and 562.8 ± 2.1 Ma. Lastly, in situ U-Pb dating of rutile inclusions in garnet cores present ages of 606.1 ± 4.0 Ma, whereas rutile included in retrograde coronae and sympleticte yielded concordant ages from 559.0 ± 2.3 to 523.2 ± 1.9 Ma. Thus, combined phase equilibria modelling and U-Pb ages reveal a progressive change in metamorphic conditions from eclogite conditions (at least 607.7 ± 5.4 to 590 ± 1.8 Ma; zircon dating and rutile ages included in eclogite garnet) to nearly isothermal decompression (574.7 ± 0.5 Ma; titanite age) of ancient Archean deep crust, which was followed by suggested final exhumation and metamorphic cooling at shallower crustal levels between 559.0 ± 2.3 and 523.2 ± 1.9 Ma (rutile age in retrogressed assemblage). Therefore, the high-pressure conditions followed by decompression and metamorphic cooling during sin- to post-collisional settings were associated with the final assembly of West Gondwana.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"138 ","pages":"Pages 70-88"},"PeriodicalIF":7.2,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658899","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)00295-8","DOIUrl":"10.1016/S1342-937X(24)00295-8","url":null,"abstract":"","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"136 ","pages":"Page IFC"},"PeriodicalIF":7.2,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142587295","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":"Enhanced landslide susceptibility mapping in data-scarce regions via unsupervised few-shot learning","authors":"Linghao Kong ,&nbsp;Wenkai Feng ,&nbsp;Xiaoyu Yi ,&nbsp;Zhenghai Xue ,&nbsp;Luyao Bai","doi":"10.1016/j.gr.2024.10.011","DOIUrl":"10.1016/j.gr.2024.10.011","url":null,"abstract":"<div><div>Given the critical need to assess landslide hazards, producing landslide susceptibility map (LSM) in regions with scarce historical landslide inventories poses significant challenges. This study introduces a novel landslide susceptibility assessment framework that combines unsupervised learning strategies with few-shot learning methods to increase the accuracy of LSM in these areas. The framework has been practically validated in a representative geological disaster-prone area along the West-East Gas Pipeline in Shaanxi Province, China. We employed three advanced few-shot learning models: a support vector machine, <em>meta</em>-learning, and transfer learning. These models implement feature representation learning for weakly correlated influencing factors through an unsupervised approach, thereby constructing an effective landslide susceptibility assessment model. We compared traditional learning methods and used the receiver operating characteristic (ROC) curve and SHAP values to quantify the effectiveness of the models. The results indicate that the <em>meta</em>-learning algorithm outperforms both the SVM and transfer learning in areas with limited landslide data. The integration of unsupervised strategies significantly improves performance, achieving area under the curve (AUC) values of 0.9385 and 0.9861, respectively. Compared with using <em>meta</em>-learning alone, incorporating unsupervised learning strategies increased the AUC by 4.76%, enhancing both the predictive power of the model and the interpretability of the features. Meta-learning under unsupervised conditions effectively mitigates the evaluation difficulties caused by insufficient landslide records, providing a viable path and empirical evidence for performance improvement in similar data- scarce regions worldwide.</div></div>","PeriodicalId":12761,"journal":{"name":"Gondwana Research","volume":"138 ","pages":"Pages 31-46"},"PeriodicalIF":7.2,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658925","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}