Geoscience frontiers最新文献

{"title":"A new integrated intelligent computing paradigm for predicting joints shear strength","authors":"Shijie Xie ,&nbsp;Zheyuan Jiang ,&nbsp;Hang Lin ,&nbsp;Tianxing Ma ,&nbsp;Kang Peng ,&nbsp;Hongwei Liu ,&nbsp;Baohua Liu","doi":"10.1016/j.gsf.2024.101884","DOIUrl":"10.1016/j.gsf.2024.101884","url":null,"abstract":"<div><p>Joints shear strength is a critical parameter during the design and construction of geotechnical engineering structures. The prevailing models mostly adopt the form of empirical functions, employing mathematical regression techniques to represent experimental data. As an alternative approach, this paper proposes a new integrated intelligent computing paradigm that aims to predict joints shear strength. Five metaheuristic optimization algorithms, including the chameleon swarm algorithm (CSA), slime mold algorithm, transient search optimization algorithm, equilibrium optimizer and social network search algorithm, were employed to enhance the performance of the multilayered perception (MLP) model. Efficiency comparisons were conducted between the proposed CSA-MLP model and twelve classical models, employing statistical indicators such as root mean square error (<em>RMSE</em>), correlation coefficient (<em>R</em>²), mean absolute error (<em>MAE</em>), and variance accounted for (<em>VAF</em>) to evaluate the performance of each model. The sensitivity analysis of parameters that impact joints shear strength was conducted. Finally, the feasibility and limitations of this study were discussed. The results revealed that, in comparison to other models, the CSA-MLP model exhibited the most appropriate performance in terms of <em>R</em>² (0.88), <em>RMSE</em> (0.19), <em>MAE</em> (0.15), and <em>VAF</em> (90.32%) values. The result of sensitivity analysis showed that the normal stress and the joint roughness coefficient were the most critical factors influencing joints shear strength. This paper presented an efficacious attempt toward swift prediction of joints shear strength, thus avoiding the need for costly in-site and laboratory tests.</p></div>","PeriodicalId":12711,"journal":{"name":"Geoscience frontiers","volume":"15 6","pages":"Article 101884"},"PeriodicalIF":8.5,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674987124001087/pdfft?md5=73339df52a8d7bff7cac10fee836eaf1&pid=1-s2.0-S1674987124001087-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141777854","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":"Potassium isotopes trace the formation of juvenile continental crust","authors":"Hamed Gamaleldien ,&nbsp;Kun Wang ,&nbsp;Tim E. Johnson ,&nbsp;Jian-Feng Ma ,&nbsp;Mohamed Abu Anbar ,&nbsp;Xinmu J. Zhang ,&nbsp;Hugo K.H. Olierook ,&nbsp;Christopher L. Kirkland","doi":"10.1016/j.gsf.2024.101882","DOIUrl":"https://doi.org/10.1016/j.gsf.2024.101882","url":null,"abstract":"<div><p>Constraining the processes associated with the formation of new (juvenile) continental crust from mantle-derived (basaltic) sources is key to understanding the origin and evolution of Earth’s landmasses. Here we present high-precision measurements of stable isotopes of potassium (K) from Earth’s most voluminous plagiogranites, exposed near El-Shadli in the Eastern Desert of Egypt. These plagiogranites exhibit a wide range of <em>δ</em>⁴¹K values (–0.31‰ ± 0.06‰ to 0.36‰ ± 0.05‰; 2 SE, standard error) that are significantly higher (isotopically heavier) than mantle values (–0.42‰ ± 0.08‰). Isotopic (⁸⁷Sr/⁸⁶Sr and ¹⁴³Nd/¹⁴⁴Nd) and trace element data indicate that the large variation in <em>δ</em>⁴¹K was inherited from the basaltic source rocks of the El-Shadli plagiogranites, consistent with an origin through partial melting of hydrothermally-altered mid-to-lower oceanic crust. These data demonstrate that K isotopes have the potential to better constrain the source of granitoid rocks and thus the secular evolution of the continental crust.</p></div>","PeriodicalId":12711,"journal":{"name":"Geoscience frontiers","volume":"15 6","pages":"Article 101882"},"PeriodicalIF":8.5,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674987124001063/pdfft?md5=89d7b12133d56434a7ae12aee4c5f233&pid=1-s2.0-S1674987124001063-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141582357","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 multi-scale μCT characterization method to quantify biogenic carbonate production","authors":"V. Chandra ,&nbsp;R. Sicat ,&nbsp;F. Benzoni ,&nbsp;V. Vahrenkamp ,&nbsp;V. Bracchi","doi":"10.1016/j.gsf.2024.101883","DOIUrl":"https://doi.org/10.1016/j.gsf.2024.101883","url":null,"abstract":"<div><p>Biogenic carbonate structures such as rhodoliths and foraminiferal-algal nodules are a significant part of marine carbonate production and are being increasingly used as paleoenvironmental indicators for predictive modeling of the global carbon cycle and ocean acidification research. However, traditional methods to characterize and quantify the carbonate production of biogenic nodules are typically limited to two-dimensional analysis using optical and electron microscopy. While micro-computed tomography (µCT) is an excellent tool for 3D analysis of inner structures of geomaterials, the trade-off between sample size and image resolution is often a limiting factor. In this study, we address these challenges by using a novel multi-scale µCT image analysis methodology combined with electron microscopy, to visualize and quantify the carbonate volumes in a biogenic calcareous nodule. We applied our methodology to a foraminiferal-algal nodule collected from the Red Sea along the coast of NEOM, Saudi Arabia. Integrated µCT and SEM image analyses revealed the main biogenic carbonate components of this nodule to be encrusting foraminifera (EF) and crustose coralline algae (CCA). We developed a multi-scale µCT analysis approach for this study, involving a hybrid thresholding and machine-learning based image segmentation. We utilized a high resolution µCT scan from the sample as a ground-truth to improve the segmentation of the lower resolution full volume µCT scan which provided reliable volumetric quantification of the EF and CCA layers. Together, the EF and CCA layers contribute to approximately 65.5 % of the studied FAN volume, corresponding to 69.01 cm³ and 73.32 cm³ respectively, and the rest is comprised of sediment infill, voids and other minor components. Moreover, volumetric quantification results in conjunction with CT density values, indicate that the CCA layers are associated with the highest amount of carbonate production within this foraminiferal-algal nodule. The methodology developed for this study is suitable for analyzing biogenic carbonate structures for a wide array of applications including quantification of carbonate production and studying the impact of ocean acidification on skeletal structures of marine calcifying organisms. In particular, the hybrid µCT image analysis we adopted in this study proved to be advantageous for the analysis of biogenic structures in which the textures and components of the internal layers are distinctly visible despite having an overlap in the range of CT density values.</p></div>","PeriodicalId":12711,"journal":{"name":"Geoscience frontiers","volume":"15 6","pages":"Article 101883"},"PeriodicalIF":8.5,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674987124001075/pdfft?md5=fda20f9c499c8361710e05558a2f1680&pid=1-s2.0-S1674987124001075-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141582359","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":"Spatio-temporal assessment of soil salinization utilizing remote sensing derivatives, and prediction modeling: Implications for sustainable development","authors":"Prashant Kumar ,&nbsp;Prasoon Tiwari ,&nbsp;Arkoprovo Biswas ,&nbsp;Prashant Kumar Srivastava","doi":"10.1016/j.gsf.2024.101881","DOIUrl":"https://doi.org/10.1016/j.gsf.2024.101881","url":null,"abstract":"<div><p>This study aims to investigate the combined use of multi-sensor datasets (Landsat 4–5 &amp;<!--> <!-->8 OLI satellite imagery, spatial resolution = 30 m) coupled with field studies to evaluate spatio-temporal dynamics of soil salinization along the coastal belt in West Bengal, India. This study assesses soil salinization by mapping the salinity and electrical conductivity of saturation extract (EC_e) and utilizing spectral signatures for estimating soil salinity. The SI change (%) was analyzed (2021–1995), categorizing increases in salinity levels into 5%, 10%, and 50% changes possibly due to salt encrustation on the soil layers. The land use land cover (LULC) change map (2021–1995) demonstrates that the study area is continuously evolving in terms of urbanization. Moreover, in the study area, soil salinity ranges from 0.03 ppt to 3.87 ppt, and EC_e varies from 0.35 dSm⁻¹ to 52.85 dSm⁻¹. Additionally, vulnerable saline soil locations were further identified. Classification of soil salinity based on EC_e reveals that 26% of samples fall into the non-saline category, while the rest belong to the saline category. The Spectral signatures of the soil samples (n = 19) acquired from FieldSpec hand spectrometer show significant absorption features around 1400, 1900, and 2250 nm and indicate salt minerals. The results of reflectance spectroscopy were cross-validated using X-ray fluorescence and scanning electron microscopy. This study also employed partial least square regression (PLSR) approach to predict EC_e (<em>r</em>² = 0.79, RMSE = 3.29) and salinity parameters (<em>r</em>² = 0.75, RMSE = 0.51), suggesting PLSR applicability in monitoring salt-affected soils globally. This study’s conclusion emphasizes that remote sensing data and multivariate analysis can be crucial tools for mapping spatial variations and predicting soil salinity. It has also been concluded that saline groundwater used for irrigation and aqua-cultural activities exacerbates soil salinization. The study<!--> <!-->will help policymakers/farmers identify the salt degradation problem more effectively and adopt immediate mitigation measures.</p></div>","PeriodicalId":12711,"journal":{"name":"Geoscience frontiers","volume":"15 6","pages":"Article 101881"},"PeriodicalIF":8.5,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674987124001051/pdfft?md5=4bb7f39aea51abf8b4f49289e0cfce07&pid=1-s2.0-S1674987124001051-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141481127","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":"Multi-isotope and geochemical approach to the magma source and tectonic setting of Proterozoic anorthosite massifs and Anorthosite-Mangerite-Charnockite-Granite (AMCG) suites","authors":"L.A. Elizondo-Pacheco ,&nbsp;L.A. Solari ,&nbsp;R. González-Guzmán ,&nbsp;H.L. He ,&nbsp;E. Becerra-Torres ,&nbsp;J.A. Ramírez-Fernández ,&nbsp;R. Maldonado","doi":"10.1016/j.gsf.2024.101880","DOIUrl":"https://doi.org/10.1016/j.gsf.2024.101880","url":null,"abstract":"<div><p>The occurrence of massif-type anorthosite intrusions is a widespread Proterozoic phenomenon. They are usually associated with gabbroic, charnockitic, and granitic rocks, comprising the so-called anorthosite-mangerite-charnockite-granite (AMCG) suite. Although these rocks have been extensively studied worldwide, several aspects concerning their formation remain unsettled. Among them, the magma source and the tectonic setting are the most important. To evaluate these issues, we first compiled geochemical and isotopic data of Proterozoic anorthosite massifs and AMCG suites worldwide and stored it in a database named datAMCG. This plethora of data allows us to make some important interpretations. We argue that the wide-ranging multi-isotopic composition of this group of rocks reflects varying proportions of juvenile mantle-derived melts and crustal components. We interpret that the precursor magmas of most massive anorthosite bodies and associated mafic rocks have a mantle-dominated origin. However, we highlight that a crustal component is indispensable to generate these lithologies. Adding variable amounts of this material during succeeding multi-stage assimilation-fractional crystallization (AFC) processes gives these intrusions their typical mantle-crustal hybrid isotopic traits. In contrast, a crustal-dominant origin with a complementary mantle component is interpreted for most MCG rocks. In summary, the isotopic information in datAMCG indicates that both sources are necessary to generate AMCG rocks. Therefore, we suggest that hybridized magmas with different mantle-crust proportions originate these rocks. This interpretation might offer a more nuanced and accurate depiction of this phenomenon in future work instead of choosing a single-sourced model as in the past decades. Finally, tectonomagmatic diagrams suggest that the rocks under study were likely generated in a tectonic environment that transitioned between collision and post-collisional extension, sometimes involving subduction-modified mantle sources. This interpretation is supported by geological and geochronological information from most complexes, thus challenging the Andean-type margins as an ideal tectonic setting.</p></div>","PeriodicalId":12711,"journal":{"name":"Geoscience frontiers","volume":"15 6","pages":"Article 101880"},"PeriodicalIF":8.5,"publicationDate":"2024-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S167498712400104X/pdfft?md5=c0e2836e2640546e00c349bec1da1e5e&pid=1-s2.0-S167498712400104X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141481125","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":"Geology and genesis of the Aqishan Pb-Zn deposit, NW China: Insights from mineralogy, geochemistry, and in situ U-Pb geochronology","authors":"Kang Wang,&nbsp;Yinhong Wang,&nbsp;Jun Deng,&nbsp;Jiajun Liu,&nbsp;Fangfang Zhang,&nbsp;Wei Zhang,&nbsp;Hui Zhang,&nbsp;Wenxin Gu,&nbsp;Hong Chen","doi":"10.1016/j.gsf.2024.101877","DOIUrl":"10.1016/j.gsf.2024.101877","url":null,"abstract":"<div><p>The unique ore-forming processes and the key factors responsible for formation of skarn deposits are still obscure, and challenges exist in the determination of timing of Pb-Zn skarns owing to lacking suitable mineral chronometers. Here we present detailed paragenesis, bulk geochemistry, in situ U-Pb dating of zircon and garnet, and garnet oxygen isotopes together with in situ zircon Hf-O isotopes from the newly discovered Aqishan Pb-Zn deposit in the southern Central Asian Orogenic Belt (CAOB), northwest China. This comprehensive data set revealed a Late Carboniferous subduction-related distal Pb-Zn skarn system associated with the granitic magmatism. Pre-ore stage garnets are generally subhedral to euhedral with oscillatory zoning and show slightly fractionated rare earth element patterns with positive Eu anomalies that point to an infiltration metasomatism origin under high water/rock ratios. The <em>syn</em>-ore stage sphalerite is typically enriched in Mn and Cd and has moderate Zn/Cd ratios (337–482), with a formation temperature of 265 °C to 383 °C, which indicate magmatic-hydrothermal signatures. The isocons defined by P₂O₅ decipher that the principal factors for skarn formation were elevated activities of Fe, Ca, and Si species, where remobilization of Pb metals, meanwhile, contributed to ore-forming budgets to mineralizing fluids. SIMS U-Pb dating of zircons from granite porphyry that occurs distal to the skarns and Pb-Zn orebodies shows that these intrusions emplaced at ca. 311.3–310.6 Ma, recording the subduction of the Paleo-Tianshan oceanic plate. Hydrothermal garnets in close textural association with Pb-Zn sulfides yield indistinguishable in situ LA-ICP-MS U-Pb ages of 310.5 ± 4.1 Ma. Whole-rock geochemistry and in situ zircon Hf-O isotopes (<em>δ</em>¹⁸O = 4.6‰–6.0‰) indicate that the granite porphyry was derived from partial melting of juvenile crust and influenced by subducted oceanic crust. Oxygen isotope compositions of garnets (<em>δ</em>¹⁸O = 8.0‰–9.0‰) demonstrate that the equilibrated ore fluids were inherited from fluid-rock interactions between a primary magmatic water and host tuff rocks. Our study highlights the application of garnets as a potential robust U-Pb geochronometer and isotopic tracer of ore fluids in skarn mineralizing systems in subduction-related arc environments.</p></div>","PeriodicalId":12711,"journal":{"name":"Geoscience frontiers","volume":"15 5","pages":"Article 101877"},"PeriodicalIF":8.9,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674987124001014/pdfft?md5=0da461e07211eb27144ded60fd846be2&pid=1-s2.0-S1674987124001014-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141397697","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":"Contribution of hydro energy production, economic complexity and technological innovation in achieving an environmentally sustainable Asia","authors":"Farah Rana ,&nbsp;Bilal Hussain ,&nbsp;Abdelmohsen A. Nassani ,&nbsp;Ayesha Hussain ,&nbsp;Mohamed Haffar ,&nbsp;Syed Asif Ali Naqvi","doi":"10.1016/j.gsf.2024.101876","DOIUrl":"10.1016/j.gsf.2024.101876","url":null,"abstract":"<div><p>The impact of hydro energy production, economic complexity, urbanization, technological innovation and financial development on environmental sustainability between 1995 and 2017 is examined for a panel of thirteen Asian economies using two environmental proxies— their ecological footprint and CO₂ emissions. The non-parametric Driscoll-Kraay standard error method and the Dumitrescu-Hurlin panel causality test are applied to the data. Our findings show that hydro energy production and technological innovation have a significant negative impact on the environment, thus promoting environmental sustainability. Economic complexity significantly lowers environmental sustainability while the non-linear effect of economic complexity favors environmental sustainability; this confirms the existence of an economic-complexity-based inverted-U-shaped environmental Kuznets curve hypothesis. Moreover, urbanization and financial development significantly decrease environmental sustainability. The results of our study confirm the feedback causality between hydro energy production and carbon dioxide emissions. We recommend expansionary policies regarding hydro energy production that are beneficial for substituting fossil fuel energy. This paves a path towards environmental sustainability in this era of global boiling.</p></div>","PeriodicalId":12711,"journal":{"name":"Geoscience frontiers","volume":"15 5","pages":"Article 101876"},"PeriodicalIF":8.5,"publicationDate":"2024-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674987124001002/pdfft?md5=458adcb455297f39664bb6c38ff43b56&pid=1-s2.0-S1674987124001002-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141394977","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":"U-Pb dating of bastnäsite from the Vuoriyarvi massif: An example application for assessing the REE potential of carbonatite-related deposits","authors":"Evgeniy N. Kozlov ,&nbsp;Ekaterina N. Fomina ,&nbsp;Qiuli Li ,&nbsp;Jiao Li","doi":"10.1016/j.gsf.2024.101875","DOIUrl":"10.1016/j.gsf.2024.101875","url":null,"abstract":"<div><p>The Vuoriyarvi massif is a Devonian multistage alkaline-ultrabasic carbonatite complex within the Kola alkaline province. Dolomite carbonatites of the Vuoriyarvi massif contain abundant rare-earth mineralization mainly represented by ancylite-(Ce) and bastnäsite-(Ce). Ancylite was previously shown to have probably formed in the Devonian (ca. 365 Ma) during an early postmagmatic overprint. Previous geological observations have revealed a much later crystallization of bastnäsite but have not been able to specify the exact age of the mineralization. The <em>in situ</em> U-Pb dating of bastnäsite allowed us to constrain its genesis. Bastnäsite for this study was extracted from two varieties of dolomite carbonatite breccias cemented by (1) quartz-bastnäsite and (2) strontianite aggregates (hereafter bastnäsite-rich and strontianite-rich carbonatites – BRC and SRC, respectively). The obtained age estimations (237.7 ± 9.8 Ma and 239.9 ± 4.1 Ma, respectively) indicate that both studied rocks were formed during a single event. The revealed age difference (∼125 Ma) excludes the genetic link between the bastnäsite origin and regional alkaline magmatism, pointing out an additional source for the Vuoriyarvi bastnäsite-bearing rocks. Moreover, the obtained U-Pb ages provide strong evidence that a Triassic event is responsible for the occurrence of bastnäsite mineralization due to hydrothermal REE redistribution from the Devonian ancylite-rich carbonatites. Most of the REEs released during this process via dissolution of ancylite were precipitated <em>in situ</em> as bastnäsite, while strontium was transported and incorporated into strontianite. The Pb isotopic characteristics of bastnäsite (²⁰⁶Pb/²⁰⁴Pb = 18.1 ± 0.1, ²⁰⁷Pb/²⁰⁴Pb = 15.3 ± 0.1, and ²⁰⁷Pb/²⁰⁶Pb = 0.84 ± 0.01) are most probably inherited from the Devonian host rocks of the Vuoriyarvi massif involved in the Triassic overprint. Isotopic signatures of Pb, Sr, and Nd show that the depleted mantle and lower crust played the leading role in formation of the Vuoriyarvi alkaline complex. Taken together, the results of the present study negate the supergene origin of the Vuoriyarvi bastnäsite, implying that the bastnäsite mineralization is not confined to near-surface layers and, therefore, may be dispersed more broadly throughout the complex. These findings raise the question on underestimation of the probable REE reserves and lay the groundwork for a reassessment of the economic potential of the Vuoriyarvi complex.</p></div>","PeriodicalId":12711,"journal":{"name":"Geoscience frontiers","volume":"15 5","pages":"Article 101875"},"PeriodicalIF":8.9,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674987124000999/pdfft?md5=65fa9c0197454f20fcdf028872f5c1bd&pid=1-s2.0-S1674987124000999-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141279540","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":"Does environmental policy stringency alter the natural resources-emissions nexus? Evidence from G-7 countries","authors":"Roni Bhowmik ,&nbsp;Arshian Sharif ,&nbsp;Ahsan Anwar ,&nbsp;Qasim Raza Syed ,&nbsp;Phan The Cong ,&nbsp;Ngo Ngan Ha","doi":"10.1016/j.gsf.2024.101874","DOIUrl":"https://doi.org/10.1016/j.gsf.2024.101874","url":null,"abstract":"<div><p>Natural resource management is indispensable keeping in view their positive economic impacts as well as their detrimental environmental consequences. To achieve certain SDGs, it is inevitable to manage natural resources through effective policies that help to inhibit adverse environmental impacts. Based on this approach, the current empirical analysis aims to probe whether environmental policy stringency intensifies, meagres, and/or halts the abysmal environmental impact of natural resources in G-7 countries (United Kingdom, United States, Canada, Italy, France, Japan, and Germany) for the period from 1990 to 2020. To that end, we rely on the second-generation panel data approaches and panel quantile regression. The outcomes reveal that natural resources increase carbon dioxide emission whereas the synergy of natural resources and environmental policy stringency plunges emissions across the quantiles. These findings suggest adoption of a strict environmental policy for attaining the targets of SGD-08 (economic growth), SDG-09 (innovations), SDG-11 (sustainable cities), SDG-12 (responsible consumption of natural resources), and SDG-13 (climate action).</p></div>","PeriodicalId":12711,"journal":{"name":"Geoscience frontiers","volume":"15 5","pages":"Article 101874"},"PeriodicalIF":8.9,"publicationDate":"2024-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674987124000987/pdfft?md5=fbf8b4387f98066d7223b34e7ebcb98d&pid=1-s2.0-S1674987124000987-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141291383","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":"Geochronological and genetic characterization of basaltic basement from western offshore basins in India","authors":"Piyush Gupta ,&nbsp;Shakti Singh Rathore ,&nbsp;Sandeep Singh","doi":"10.1016/j.gsf.2024.101871","DOIUrl":"10.1016/j.gsf.2024.101871","url":null,"abstract":"<div><p>⁴⁰Ar-³⁹Ar geochronology, geochemistry, and Sr-Nd isotopic compositions of 30 core samples from 24 offshore drill wells in the Western offshore basins have been used to characterize the genetics of the volcanic basement from the Kutch, Mumbai, and Kerala-Konkan offshore basins. Findings from the volcanic basement rocks demonstrate extremely varied isotopic and geochemical fingerprints, which are suggestive of significantly diverse parent magma compositions and emplacement processes.</p><p>Basaltic tholeiitic basement from Kutch Offshore basin has Ar-Ar ages that range between 60 Ma and 62 Ma. This basement is characterised by a within-plate basalt signature, with depleted isotopic signatures similar to least contaminated Deccan Traps basalts, and a component of subducted crustal material. Basaltic basement from Mumbai Offshore Basin has eruption ages between 63 Ma and 65 Ma and show a strong within-plate OIB affinity. Geochemical and isotopic signatures are consistent with Renuion lavas and an enriched-end member of Deccan Traps basalts. However, Kerala-Konkan Offshore Basin shows significant E-MORB affinity and is characterized by primitive-mantle signatures and least contamination from the upper continental crust, with ages of eruption between 60 Ma and 61 Ma based on obtained ⁴⁰Ar-³⁹Ar ages.</p><p>The study suggests that the Mumbai Offshore Basalts’ mode of the eruption was comparable with onshore Deccan volcanism, whereas the basaltic basement in Kutch Offshore was formed after the main phase of Deccan eruption and may have been an offshoot of a “tail” of the main Deccan volcanism. The parent magma for the volcanic E-MORB basement in the Kerala-Konkan Offshore Basin is thought to have come from mixing along the Carlsberg Mid-Oceanic Ridge and the material from the Réunion plume with the northward movement of the Indian Plate during the Early Paleocene. This is thought to have occurred concurrently with the formation of the Chagos-Laccadive Ridge.</p></div>","PeriodicalId":12711,"journal":{"name":"Geoscience frontiers","volume":"15 5","pages":"Article 101871"},"PeriodicalIF":8.9,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1674987124000951/pdfft?md5=aa7b22844bb8770ac9d48c3e129de8c5&pid=1-s2.0-S1674987124000951-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141139581","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}