期刊,地学前缘(英文版) 2024年卷6期_国家学术搜索

期刊信息/Journal information

地学前缘(英文版)

主　　编：莫宣学

出版周期：双月刊

国际刊号：1674-9871

电子邮箱：geofrontier@cugb.edu.cn

电　　话：010-82322283,82321855

邮政编码：100083

地　　址：北京市海淀区学院路29号中国地质大学（北京）期刊中心

地学前缘(英文版)/Journal GEOSCIENCE FRONTIERSCSCDCSTPCD北大核心SCI

查看更多>>GEOSCIENCE FRONTIERS (GSF) is a quarterly journal that publishes in English significant original research articles and high quality reviews of recent advances in all fields of Earth Sciences — including stratigraphy and paleontology, mineralogy and petrology, economic geology and minerals and fuel exploration, structural geology, lithospheric tectonics, environmental and engineering geology, hydrogeology, astrogeology, marine geology, and geophysics and geochemistry. Technical papers, case histories, reviews, and discussions are welcomed.

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Extreme geochemical fractionation during mantle melting:Insights from Hf-Nd isotopically ultra-depleted eclogite

Kun ZhouYi-Xiang ChenYong-Fei ZhengRen-Xu Chen...

161-171页

查看更多>>摘要：Extreme fractionation of elements and isotopes in mafic igneous rocks is abnormal in deciphering the source nature and melting conditions of mafic magmatism.Especially,identification of geochemically ultra-depleted mafic melts and their mantle sources has great bearing on the property of crust-mantle differentiation at plate margins.This is illustrated by extreme Hf-Nd isotope fractionation in ultrahigh-pressure eclogites from the Sulu orogen in east-central China.In addition to the previous finding of ultra-high εNd(0)values,we report here new data of whole-rock trace elements and Lu-Hf isotopes in eclogites and related rocks from the same region.The present results show extremely high Lu/Hf ratios and abnor-mally highεHf(0)values of up to 576 for the eclogites,significantly different from the garnet amphibolites and other eclogite-facies metamorphic rocks in the same orogen.This feature is coupled with the ultra-high εNd(0)values as well as the severe depletion of light rare earth elements(LREE)and high field strength elements(HFSE).Because HFSE and LREE are immobile in aqueous solutions and the effect of melt extraction is insignificant during the continental deep subduction,the extreme fractionation of Lu/Hf and Sm/Nd indicate their origination from a geochemically ultra-depleted mantle source.These eclogites have the depleted mantle Hf model ages of 1.27 Ga to 1.61 Ga,similar to the depleted mantle Nd model ages of 1.39 Ga to 1.67 Ga as previously reported.This suggests that the protolith of the extre-mely high EHrεNd eclogites was a kind of mafic igneous rocks derived from fractional crystallization of geochemically ultra-depleted mafic melts,which were produced by partial melting of the highly refrac-tory lithospheric mantle during a series of seafloor spreading initiation-failure cycles at a divergent plate margin after the breakup of supercontinent Columbia in the Early Mesoproterozoic.The mafic igneous rocks were located in a passive continental margin in the Late Paleozoic and experienced deep subduction and exhumation in the Triassic,giving rise to the presently studied eclogites.The ancient geochemical signatures were retained without considerable influence by mantle convection,providing insights into the nature of crust-mantle differentiation during the tectonic transition from supercontinental breakup to seafloor spreading beneath the sub-ridge lithospheric mantle.

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万方数据
维普

Late Quaternary tectonic uplift and Yellow River evolution create high arsenic aquifers in the Hetao Basin,China

Haoyue ZhangXujiao ZhangPeisheng YeChenglu Li...

173-181页

查看更多>>摘要：High arsenic(As)groundwater is a global problem primarily originating from As-enriched sediments.The provenance(source)and release mechanisms(sinks)of high As sediment have been identified,but the source-sink transfer is poorly understood,especially the influence of geological and surface processes.In this study,we explore the roles of tectonic movement and Yellow River evolution in provenance for-mation processes and evaluate the combined effects of provenance and sediment age on the As content of aquifer sediments in the northern Hetao Basin of Inner Mongolia.Based on optically stimulated lumines-cence(OSL)and 14C dating and detrital zircon U-Pb,As content,and lithological analyses of a 400 m core,we reconstructed As changes over the last 160 ka.Our results show clay deposited in a paleo-lake during the Gonghe movement period in the late Pleistocene(～100 ka B.P.)is enriched in As(31.8 μg/g)due to significant provenance contributions of the As-bearing Langshan Group under tectonic uplift and moun-tain erosion.In contrast,clay deposited in the middle Pleistocene(～160 ka B.P.)has lower As content(7.3 μg/g)due to the Yellow River as the primary provenance.Accordingly,the provenance of basin As forced by tectonic uplift and Yellow River evolution determines the background As of aquifer sediments.After deposition,sediment As content decays over time,with higher decay rates in coarse-grained sands than fine-grained.Overall,both provenance formation and sediment age,representing initial and dynamic states of solid phase As,jointly determine the As content of aquifer sediments.More solid phase As provided by younger sediments from the proximal orogenic provenance and reducing conditions due to frequent river-lake transitions,jointly lead to higher As concentrations in shallow groundwater.The study highlights the potential for using a combined analysis of the tectonic movement-surface processes-environment system to improve understanding of geogenic high As groundwater over global large sedimentary basins in the proximity of young orogenic belts.

原文链接:

万方数据
维普

A new integrated intelligent computing paradigm for predicting joints shear strength

Shijie XieZheyuan JiangHang LinTianxing Ma...

183-200页

查看更多>>摘要：Joints shear strength is a critical parameter during the design and construction of geotechnical engineer-ing structures.The prevailing models mostly adopt the form of empirical functions,employing mathe-matical 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 mod-els,employing statistical indicators such as root mean square error(RMSE),correlation coefficient(R2),mean absolute error(MAE),and variance accounted for(VAF)to evaluate the performance of each model.The sensitivity analysis of parameters that impact joints shear strength was conducted.Finally,the fea-sibility 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 R2(0.88),RMSE(0.19),MAE(0.15),and VAF(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 avoid-ing the need for costly in-site and laboratory tests.

原文链接:

万方数据
维普

Gravitational and elastic energies stored in crustal volumes activate normal versus strike-slip and thrust seismogenic faults

Carlo Doglioni

201-213页

查看更多>>摘要：Shallow crustal faults are passive features mobilized by the dissipation of the potential energy and the shear stress accumulated in the brittle volume surrounding them.However,the stored energy in the vol-ume differs from the tectonic setting,i.e..it is mainly gravitational in extensional tectonic settings,whereas it is elastic in strike-slip and contractional tectonic environments.In extensional settings,below about 1 km,the horizontal tensile stress is overwhelmed by the confining pressure of the lithostatic load,and it becomes positive,i.e.compressive.Therefore,there is no horizontal tension in extensional tectonic settings and the pro-gravity motion of the crustal volume is provided by the lithostatic load,which is the vertical maximum principal stress.The elastic energy is rather accumulated by the maximum horizontal principal stresses,i.e.,iso-gravity in transcurrent settings and counter-gravity in contractional tectonic settings.The different relation with the gravitational force in the different tectonic settings generates sev-eral relevant differences in the three main tectonic environments.The extensional tectonic settings,both in continental and oceanic rift zones generate normal fault-related earthquakes,i.e.,pro-gravity move-ments,or graviquakes.They differ from the other tectonic setting because are marked by(i)lower energy and lower differential stress to activate faults with respect to strike-slip and contractional tectonics;(ii)lower maximum earthquake magnitude;(iii)a larger number of low magnitude earthquakes in exten-sional settings because the crust moves downward as soon as it can move,whereas contractional settings require larger accumulation of energy to move counter-gravity;(iv)consequently,the b-value of the Gutenberg-Richter is higher than 1 and the aftershocks are more numerous and last longer in extensional settings;(v)the downward motion of the hangingwall determines more diffuse cataclastic deformation with respect to the other tectonic settings because the lithostatic load works everywhere,whereas in the other tectonic settings is concentrated where the elastic energy accumulates;(vi)in extensional settings the volume dimension is determined by thickness of the brittle layer,and its length is in average three times the seismogenic thickness;in strike-slip and contractional settings dominates the elastic energy(elastoquakes),and the mobilized volume may be ten to thirty times longer in a single seismic sequence,being its size proportional both to the brittle thickness and the relative speed of plates.These differences characterize the seismic cycle of graviquakes with respect to the elastoquakes.The bigger the volume,the wider the seismogenic fault in all tectonic settings.The interplay between the horizontal tectonic forces and the lithostatic load,which is ubiquitous,varies in the three main tectonic settings,generating differ-ent seismotectonic styles and an increase of magnitude as the effect of the vertical gravitational force becomes a minority relative to the elastic storage and coseismic rebound.

原文链接:

万方数据
维普

Assessing the palliative aspects of green innovations in the non-linear tendencies of environmental sustainability-financial globalization nexus among West African states

Mohammed MusahStephen Taiwo OnifadeElma SatrovicJoseph Akwasi Nkyi...

215-236页

查看更多>>摘要：A reconciliation of the disagreement on whether financial globalization(FG)affects ecological footprint through the scale,technique and composition effects cannot be achieved without an explicit understand-ing of the direct and indirect interactions of FG with environmental sustainability.Hence,the novel per-spective of this study lies in the investigation of how green innovations moderate the non-linear tendencies in the FG-environmental sustainability link among western African states given the abun-dance of natural resources and the prevailing pace of economic growth.The core findings are obtained from robust analysis based on cross-sectional autoregressive distributed lag(CS-ARDL)technique,the augmented mean group(AMG)technique,and the common correlated effects mean group(CCEMG)advanced estimators.Firstly,the beneficial ecological impacts of green innovations were observed.As per direct impact,enhanced financial globalization(FG)exhibits non-linear detrimental ecological effects.However,green innovations cushion the observed adverse ecological effects of FG.Furthermore,resource rents reduce ecological footprint within the moderating framework of green inno-vation as the environmental Kuznets curve(EKC)is validated among the states.Additionally,a bidirec-tional causal link between financial globalization,green innovations,economic growth,natural resources,and ecological footprint was observed.Thus,the significant policy implication is for the West African states to decisively increase their investments in green innovations while strategically encouraging the share of ecologically friendly resources in total resource utilization to guarantee a more sustainable environment.

原文链接:

万方数据
维普

Towards an improved prediction of soil-freezing characteristic curve based on extreme gradient boosting model

Kai-Qi LiHai-Long He

237-251页

查看更多>>摘要：As an essential property of frozen soils,change of unfrozen water content(UWC)with temperature,namely soil-freezing characteristic curve(SFCC),plays significant roles in numerous physical,hydraulic and mechanical processes in cold regions,including the heat and water transfer within soils and at the land-atmosphere interface,frost heave and thaw settlement,as well as the simulation of coupled thermo-hydro-mechanical interactions.Although various models have been proposed to estimate SFCC,their applicability remains limited due to their derivation from specific soil types,soil treatments,and test devices.Accordingly,this study proposes a novel data-driven model to predict the SFCC using an extreme Gradient Boosting(XGBoost)model.A systematic database for SFCC of frozen soils compiled from extensive experimental investigations via various testing methods was utilized to train the XGBoost model.The predicted soil freezing characteristic curves(SFCC,UWC as a function of tempera-ture)from the well-trained XGBoost model were compared with original experimental data and three conventional models.The results demonstrate the superior performance of the proposed XGBoost model over the traditional models in predicting SFCC.This study provides valuable insights for future investiga-tions regarding the SFCC of frozen soils.

原文链接:

万方数据
维普

Exploring the impact of green technology,renewable energy and globalization towards environmental sustainability in the top ecological impacted countries

Arshian SharifUzma BashirSumera MehmoodCalvin W.H.Cheong...

253-263页

查看更多>>摘要：Green environmental technologies,renewable energy and globalization are interconnected pillars that impact economies and societies.By effectively fostering these resources,environmental policies can help achieve economic prosperity,sustainable development and environmental protection.The current study seeks to address environmental and economic predicaments by empirically examining the role of green technology and renewable energy in influencing the load capacity factor and ecological footprint with the highest ecological impact.Given that these nations are also significant players in the global economy,we also examine the impact of Globalization and economic growth within econometric investigation.The current study uses moments quantile regression(MMQR)as an econometric strategy to report that while innovations in green technology and renewable energy positively influence load factor capacity and help reduce ecological footprint,certain facets of globalization worsen the ecological footprint,thereby unset-tling its load factor capacity.These findings underscore the pressing need for policymakers to prioritize integrating environmental and trade policy agreements to ensure progress towards long-term environ-mental goals.

原文链接:

万方数据
维普

Carbon isotope fractionation during methane transport through tight sedimentary rocks:Phenomena,mechanisms,characterization,and implications

Wenbiao LiJun WangChengzao JiaShuangfang Lu...

265-286页

查看更多>>摘要：The phenomenon of carbon isotopic fractionation,induced by the transport of methane in tight sedimen-tary rocks through processes primarily involving diffusion and adsorption/desorption,is ubiquitous in nature and plays a significant role in numerous geological and geochemical systems.Consequently,understanding the mechanisms of transport-induced carbon isotopic fractionation both theoretically and experimentally is of considerable scientific importance.However,previous experimental studies have observed carbon isotope fractionation phenomena that are entirely distinct,and even exhibit oppos-ing characteristics.At present,there is a lack of a convincing mechanistic explanation and valid numerical model for this discrepancy.Here,we performed gas transport experiments under different gas pressures(1-5 MPa)and confining pressures(10-20 MPa).The results show that methane carbon isotope fraction-ation during natural gas transport through shale is controlled by its pore structure and evolves regularly with increasing effective stress.Compared with the carbon isotopic composition of the source gas,the initial effluent methane is predominantly depleted in 13C,but occasionally exhibits 13C enrichment.The carbon isotopic composition of effluent methane converges to that of the source gas as mass trans-port reaches a steady state.The evolution patterns of the isotope fractionation curve,transitioning from the initial non-steady state to the final steady state,can be categorized into five distinct types.The com-bined effect of multi-level transport channels offers the most compelling mechanistic explanation for the observed evolution patterns and their interconversion.Numerical simulation studies demonstrate that existing models,including the Rayleigh model,the diffusion model,and the coupled diffusion-adsorp tion/desorption model,are unable to describe the observed complex isotope fractionation behavior.In contrast,the multi-scale multi-mechanism coupled model developed herein,incorporating diffusion and adsorption/desorption across multi-level transport channels,effectively reproduces all the observed fractionation patterns and supports the mechanistic rationale for the combined effect.Finally,the poten-tial carbon isotopic fractionation resulting from natural gas transport in/through porous media and its geological implications are discussed in several hypothetical scenarios combining numerical simulations.These findings highlight the limitations of carbon isotopic parameters for determining the origin and maturity of natural gas,and underscore their potential in identifying greenhouse gas leaks and tracing sources.

原文链接:

万方数据
维普

The upstream rare earth resources of Malaysia:Insight into geology,geochemistry,and hydrometallurgical approaches

Syed Muhammad IbadHaylay TsegabNumair Ahmed SiddiquiMonera Adam...

287-312页

查看更多>>摘要：Peninsular Malaysia is already well known for having rare earth(RE)resources.However,pertinent data and information on upstream RE resources and reserve potential in Malaysia are yet to be established.It is vital to identify opportunities and challenges for value addition to rare earth elements(REEs)deposits in Malaysia.Therefore,this study evaluates the potential of Malaysian geological formations to serve as repositories for RE resources,such as rare earth minerals(REMs)and REEs,by elucidating the geological processes that are considered critical to the formation of the various deposit types.This paper concisely reviews possible REE mineralization in alkaline igneous rocks,pegmatites,placer deposits:monazite and xenotime,marine sediments,river and lake sediments,ion adsorption clays(1AC)deposits,and shale/coal deposits found in Malaysia.Comparisons between Malaysian deposits revealed that these deposits are potentially enriched with RE resources showing geological formations across the world.The paper reviews the methods and flowsheets used for the recovery of REMs and REEs from primary,secondary as well as alternative resources,with special consideration to the hydrometallurgical procedures com-prising of leaching with acids and alkalis tailed by ion exchange,solvent extraction,or precipitation.The REEs ecosystem of Malaysia has also been discussed by considering the latest information from the Malaysian Investment Development Authority(MIDA),the REEs processing center,the Academy of Science of Malaysia(ASM),the People's Republic of China(PRC),Lynas Malaysia Sdn.Bhd.(Lynas),Ministry of Energy and Natural Resources(NRECC),Jabatan Mineral & Geosains(JMG),Ministry of Science,Technology,and Innovation(MOSTI),and the Malaysian Chamber of Mines.The information on upstream RE resources and recent hydrometallurgical approaches provided in this study will con-tribute to developing and enhancing midstream and downstream RE-based manufacturing and process-ing operations in Malaysia.

原文链接:

万方数据
维普

Deep recycling of volatile elements in the mantle:Evidence from the heterogeneous B isotope in intra-plate basalts

Yan-Qing LiHiroshi KitagawaChang-Qian MaEizo Nakamura...

313-330页

查看更多>>摘要：Volatiles in the mantle are crucial for Earth's geodynamic and geochemical evolution.Understanding the deep recycling of volatiles is key for grasping mantle chemical heterogeneity,plate tectonics,and long-term planetary evolution.While subduction transfers abundant volatile elements from the Earth's surface into the mantle,the fate of hydrous portions within subducted slabs during intensive dehydration pro-cesses remains uncertain.Boron isotopes,only efficiently fractionating near the Earth's surface,are valu-able for tracing volatile recycling signals.In this study,we document a notably large variation in δ11B values(-14.3‰ to+8.2‰)in Cenozoic basalts from the South China Block.These basalts,associated with a high-velocity zone beneath East China,are suggested to originate from the mantle transition zone.While the majority exhibit δ11B values(-10‰ to-5‰)resembling the normal mantle,their enriched Sr-Nd-Pb isotope compositions and fluid-mobile elements imply hydrous components in their source,including altered oceanic crust and sediments.The normal δ11B values are attributed to the dehydration processes.Remarkably high δ11B values in the basalts indicate the presence of subducted serpentinites in their mantle source.A small subset of samples with low δ11B values and radiogenic isotope enrichments suggests a contribution from recycled detrital sediments,though retaining minimal volatile elements after extensive dehydration.These findings provide compelling evidence that serpentinites within sub-ducted slabs predominantly maintain their hydrous nature during dehydration processes in subduction zones.They may transport a considerable amount of water into deep mantle reservoirs,such as the man-tle transition zone.

原文链接:

万方数据
维普