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The changes in the annual distribution of mountain runoff during the period of 1965-2018 in Hexi Corridor,Northwest China

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Research in Cold and Arid Regions 2024年第2期16卷 73-83页

作者： Yan Luo ZhiXiang Lu Qi Feng Meng Zhu JinBo Zhang Key Laboratory of Ecological Safety and Sustainable development in Arid Lands Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhouGansu 730000China University of Chinese Academy of Sciences Beijing 100049China cCollege of resources and Environmental Sciences Gansu Agricultural UniversityLanzhouGansu 730000China

The annual distribution characteristics of river runoff in arid regions have significant implications for water resource stability and *** on the mountain runoff data from 1965 to 2018,this study examines the annual change characteristics of monthly runoff of the Shiyang River Basin,Heihe River Basin,and Shule River Basin in the Hexi Corridor,Northwest *** indexes are used and analyzed,including the coefficient of variance,the complete regulation coefficient,the concentration degree and concentration period,the magnitude of change,the skewness coefficient,and the kurtosis coefficient of the annual distribution *** results reveal the following:(1)The inhomogeneity of annual runoff distribution in the Taolai River and the rivers to the west of it,except the Shiyou River,show an increasing ***,the inhomogeneity of the rivers to the east of the Taolai River generally show a downward trend,but the coefficient of variance value is still very high.(2)In the Shiyang River Basin,the annual distribution of the concentration period is characterized by a relatively discrete ***,the Heihe River Basin exhibits a relatively concentrated pattern,and the distribution pattern of the Shule River Basin is quite ***,all concentration periods in the three basins have shifted backward after the 2000s.(3)The Shiyang River Basin exhibits disordered annual distribution curves of runoff in different *** contrast,the Heihe River Basin presents a typical‘single-peak’pattern with a prominent *** Shule River Basin has regular distribution curves,with a gradually significant‘double-peak’pattern from east to ***,there has been a slight change in runoff in the Shiyang River Basin,while the Heihe River Basin and Shule River Basin have experienced significant increases in *** annual distribution curves of runoff in the Liyuan River and the rivers to the east of it exhibit a gentle peak pattern,and th

关键词： Hexi Corridor Inland rivers Mountain runoff Annual distribution characteristics of runoff

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Clay mineral transformation in medium–high maturity shale oil reservoir: a case study of the Qingshankou Formation， Songliao Basin， Northeast China

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Journal of Earth Science 2024年

作者： Xinping Liang Xueyu Yao Rukai Zhu Xiaojun Wang Zhijun Jin Changrong Li institute of Energy， Peking University State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective development College of Geosciences/National Key Laboratory of Petroleum resources and Engineering， China University of Petroleum (Beijing) Research institute of Petroleum exploration & development PetroChina Petroleum Exploration and Production Research institute SINOPEC

Currently， significant hurdles lie ahead in China’s lacustrine shale oil exploration and exploitation， particularly due to the high clay mineral content， which severely impacts pore development in organic-rich shales. In this study， we take the medium- to high-maturity shale of the Qingshankou Formation (K2qn) in the Gulong Sag， Songliao Basin， China， as an example and analyze the dynamic evolution of the clay minerals and their effects on pore development by core observations， scanning electron microscopy， X-ray diffraction， physical property and nitrogen adsorptions to provide a valuable reference for the effective evaluation of lacustrine clay-rich shale oil reservoirs. Our findings reveal that the dynamic transformation of clay minerals in the Qingshankou Formation is classified into three stages based on diagenesis， thermal maturity， and mineral characteristics: the initial stage (vitrinite reflectivity (Ro) 1.3%). Clay minerals play crucial roles in controlling shale reservoirs during the rapid transformation process， which is evidenced by the formation of shrinkage fractures， enhanced pore connectivity， increased porosity， and expanded space for shale oil adsorption and storage. In addition， authigenic quartz can form during the transformation of clay minerals， contributing to increased reservoir brittleness and improving the potential for reservoir fracturing.

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Biogeochemistry of sedimentary organic matter in the Yongjiang River estuary in the southern part of Hangzhou Bay,China,since the Late Pleistocene

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Journal of Oceanology and Limnology 2024年第3期42卷 772-786页

作者： Dongqin HUANG Xiaolong LI Zilong LI Pei Sun LOH Jianxiong HU Jianfang CHEN Yuan-Pin CHANG Chin-Wen YANG Qin GAO institute of Marine Geology and resources Ocean CollegeZhejiang UniversityZhoushan 316021China Ministry of water resources of the People’s Republic of China Beijing 100054China Key Laboratory of Marine Ecosystem Dynamics Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China Department of Oceanography Sun Yat-sen UniversityKaohsiung 80424China

A sediment core(YJK19-02)collected from the southern outlet of Hangzhou Bay near the Yongjiang River estuary in East China was analyzed for grain size,lignin,bulk elemental composition,stable carbon isotope,and rare earth elements(REEs)to determine the sources and diagenesis of sedimentary organic matter(OM)of the estuary and adjacent areas since the Late Pleistocene.δ^(13)C values(-24.80‰–-23.60‰),total organic carbon/total nitrogen(TOC/TN)molar ratios(8.00–12.14),and light rare earth element/heavy rare earth element ratios(LREE/HREE=8.34–8.91)revealed the predominance of terrestrial sources of OM,mainly from the Changjiang(Yangtze)*** lignin parameters of syringyl/vanillyl(S/V=0.20–0.73)and cinnamyl/vanillyl(C/V=0.03–0.19)ratios indicate the predominance of nonwoody angiosperms,and the vanillic acid/vanillin ratios[(Ad/Al)_(V)=0.32–1.57]indicate medium to high degrees of lignin *** increasing trend ofΛ(total lignin in mg/100-mg OC)values from ca.14500 a BP to ca.11000 a BP reflected the increase in temperature during the Late ***,a time lag effect of temperature on vegetation abundance was also *** relatively higher and stableΛvalues correspond to the higher temperature during the mid-Holocene from ca.8500 a BP to ca.4500 a BP.Λvalues decreased from ca.4000 a BP to the present,corresponding to historical temperature fluctuations during this *** results show that the vegetation abundance in the Yongjiang River Basin since the Late Pleistocene was related to the temperature fluctuation duo to climate change.

关键词： Yongjiang River estuary sedimentary organic matter lignin environmental change Late Pleistocene

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Effects of biodegradation on diamondoid distribution in crude oils from the Bongor Basin,Chad

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Energy Geoscience 2024年第2期5卷 120-128页

作者： Huanxin Song Menghan Chen Lirong Dou Dingsheng Cheng Zhigang Wen Cooperative Innovation Center of Unconventional Oil and Gas Yangtze UniversityWuhanHubei430100China College of resources and Environment Yangtze UniversityWuhanHubei430100China PetroChina Research institute of Petroleum Exploration&development Beijing100083China

The sensitivity of biodegradation on diamondoids was investigated using a series of biodegraded oil samples from the Ronier tectonic unit of Bongor Basin,*** results suggest that diamondoids,including adamantanes(As)and diamantanes(Ds),are relatively resistant to biodegradation and obvious biodegradation was observed in oils with a Peters-Moldowan(PM)biodegradation rank of 6 or ***,the sensibility of biodegradation on diamondoids is generally similar to hopanes and regular *** biodegradation evolves,the changes in concentration and components of diamondoids show that the biodegradation process is selective and *** significant increase of MD/MA and DMD/DMA for oils with a PM ranking 6^(+) indicates that diamantanes are generally more resistant to biodegradation than *** similar trends of DMA/MA,EA/MA,MD/D,DMD/MD and other relevant indexes,show that higher alkylation homologs are more resistant to *** commonly used diamondoid ratios,such as MAI,EAI,MDI and DMID-1,are obviously affected by biodegradation at the stage of high-level biodegradation,which may indicate that these ratios should be used with caution in case of severely degraded oils.

关键词： Diamondoids Biodegradation Sensitivity Crude oil Bongor Basin Chad

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Source Enrichment Control on the Scale of Magmatic-Hydrothermal W-Sn Mineralization:Insights from Triassic and Jurassic Magma Reservoirs in the Continental Crust,Xitian,South China

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Acta Geologica Sinica(English Edition) 2024年第1期98卷 132-149页

作者： GUO Chunli Simon AWILDE Coralie SIEGEL CHEN Zhenyu WU Shichong MNR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesChinese Academy of Geological SciencesBeijing 100037China SinoProbe Laboratory Chinese Academy of Geological SciencesBeijing 100094China School of Earth and Planetary Sciences Curtin UniversityPerth 6845Australia Discovery Program Mineral ResourcesCommonwealth Scientific and Industrial Research OrganisationAustralian Resources Research CentrePerth 6151Australia No.416 Geological Group Hunan Bureau of Mineral Exploration and DevelopmentZhuzhouHunan 412007China

There are two factors,source composition and magmatic differentiation,potentially controlling W-Sn *** one is more important is widely debated and may need to be determined for each individual *** Xitian granite batholith located in South China is a natural laboratory for investigating the above *** consists essentially of two separate components,formed in the Triassic at ca.226 Ma and Jurassic at ca.152 Ma,*** Triassic and Jurassic rocks are both composed of porphyritic and fine-grained *** latter resulted from highlydifferentiated porphyritic ones but they have similar textural characteristics and mineral assemblages,indicating that they reached a similar degree of crystal *** both fine-grained phases are highly differentiated with elevated rare metal contents,economic W–Sn mineralization is rare in the Triassic granitoids and this can be attributed to less fertile source materials than their Jurassic counterparts,with a slightly more enriched isotopic signature and whole-rockεNd(226 Ma)of−10.4 to−9.2(2σ=0.2)compared withεNd(152 Ma)of−9.2 to−8.2(2σ=0.2)for the Jurassic *** initial W-Sn enrichment was derived from the metasedimentary rocks and strongly enhanced by reworking of the continental crust,culminating in the Jurassic.

关键词： W-Sn mineralization magma reservoir geometry crystal fractionation Xitian Triassic-Jurassic granitic batholith Nanling Range South China

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Ordered mesoporous materials for water pollution treatment: Adsorption and catalysis

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Green Energy & Environment 2024年第8期9卷 1239-1256页

作者： Peng Zhang Mingming He Wei Teng Fukuan Li Xinyuan Qiu Kexun Li Hao Wang College of Environmental Science and Engineering MOE Key Laboratory of Pollution Processes and Environmental CriteriaTianjin Key Laboratory of Environmental Remediation and Pollution TreatmentTianjin Key Laboratory of Environmental Technology for Complex Trans-Media PollutionNankai University Department of Chemistry and State Key Laboratory Marine Pollution Hong Kong institute for Advanced Study City University of Hong Kong State Key Laboratory for Pollution Treatment College of Environmental Science and EngineeringShanghai Institute of Pollution Treatment and Ecological SecurityTongji University State Key Laboratory of Simulation and Regulation of water Cycles in River Basins China Institute of Water Resources and Hydropower Research

To meet the growing emission of water contaminants,the development of new materials that enhance the efficiency of the water treatment system is *** mesoporous materials provide opportunities in environmental processing applications due to their exceptionally high surface areas,large pore sizes,and enough pore *** properties might enhance the performance of materials concerning adsorption/catalysis capability,durability,and *** this review,we enumerate the ordered mesoporous materials as adsorbents/catalysts and their modifications in water pollution treatment from the past decade,including heavy metals (Hg2+,Pb2+,Cd2+,Cr6+,etc.),toxic anions （nitrate,phosphate,fluoride,etc.）,and organic contaminants （organic dyes,antibiotics,etc.）.These contributions demonstrate a deep understanding of the synergistic effect between the incorporated framework and homogeneous active ***,the challenges and perspectives of the future developments of ordered mesoporous materials in wastewater treatment are *** work provides a theoretical basis and complete summary for the application of ordered mesoporous materials in the removal of contaminants from aqueous solutions.

关键词： water pollution treatment Ordered mesoporous materials Toxic contaminants Adsorption Catalysis

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Agricultural intensity for sustainable regional development:A case study in peri-urban areas of Karawang Regency,Indonesia

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Regional Sustainability 2024年第1期5卷 119-136页

作者： Setyardi Pratika MULYA Delik HUDALAH Urban and Regional Planning Study Program School of ArchitecturePlanningand Policy DevelopmentBandung Institute of TechnologyBandung40132Indonesia Department of Soil Science and Land resources Faculty of AgricultureBogor Agricultural UniversityBogor16680Indonesia Research Center for Infrastructure and Regional development Bandung Institute of TechnologyBandung40132Indonesia

Peri-urban areas are playing an increasingly crucial role in the agricultural development and intensification in ***-urban agriculture is highly vulnerable to change compared with urban and rural agriculture,due to its location in transitional *** of peri-urban agricultural intensity can help guide regional *** this study,we assessed the sustainability of peri-urban areas based on agricultural intensity in Karawang Regency,*** developed a village-based index to assess the region’s agricultural intensity by rescaling the village agriculture index(VAI)and combining the local sustainability index(LSI)with factor *** the unit of analysis is the village,we modified the LSI to the village sustainability index(VSI).In addition,we also developed a logical matrix analysis to determine the level of agricultural sustainability(LoAS)of each *** combined results of the three indices(VAI,VSI,and LoAS)generated information about agricultural *** results indicated that peri-urban villages with high agricultural intensity tended to exhibit low levels of social welfare,economic development,and disaster ***,high agricultural intensity did not necessarily ensure the prosperity of the ***,there was the economic disparity among the villages in the study *** diversity of agricultural intensity seems to be more critical than promoting agricultural intensity ***,this study highlights the distinctive characteristics and dynamic of peri-urban *** approaches,variables,and information regarding the combination of agricultural intensity and sustainability need to be developed as valuable tools for regional planning.

关键词： Agricultural intensity Village agriculture index(VAI) Village sustainability index(VSI) Level of agricultural sustainability(LoAS) Peri-urban areas Indonesia

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Sand control mechanism of radial well filled with phase change material in hydrate reservoir

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Petroleum Science 2024年第4期21卷 2571-2582页

作者： Xiao-Qiang Liu Zhong-Xi Han Zhi-Lin Luo Hai-Long Lu Ying Sun Qing You Tian-Kui Guo Zhan-Qing Qu School of Energy resources China University of Geosciences (Beijing) Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and development Engineering China University of Geosciences (Beijing) China Research institute of Petroleum Exploration and development Engineering Technology Research institute of Southwest Oil & Gas Field Company PetroChina Beijing International Center for Gas Hydrate School of Earth and Space Sciences Peking University School of Advanced Material Peking University Shenzhen Graduate School School of Petroleum Engineering China University of Petroleum (East China)

Radial well filled with phase change material has been proposed as a novel sand control method for hydrate exploitation. In order to reveal the sand control mechanism, CFD-DEM coupling method is applied to simulate the migration, settlement, and blockage processes of sand particles in the radial *** obtained results indicate that three scenarios have been recognized for sand particles passing through sand control medium, based on the diameter ratio of sand control medium to sand particle（Dd）:fully passing（Dd= 8.75-22.5）, partially passing and partially blocked（Dd= 3.18-5.63）, and completely blocked（Dd= 2.18-3.21）. After being captured by the sand control medium, sand particles can block pores, which increases fluid flow resistance and causes a certain pressure difference in the radial *** pressure in the radial well should be lower than the hydrate phase equilibrium pressure during sand control design, for the purpose of promoting hydrate decomposition, and sand capture. The length of the radial well should be optimized based on the reservoir pore pressure, production pressure difference,bottom hole pressure, and the pressure gradient in the radial well. It should be noticed that the sand control medium leads to a decrease in permeability after sand particles captured. Even the permeability is reduced to several hundred millidarcy, it is still sufficient to ensure the effective flow of gas and water after hydrate decomposition. Increasing fluid velocity reduces the blocking capacity of the sand control medium, mainly because of deterioration in bridging between sand particles.

关键词： Hydrate reservoir Sand control Radial well CFD-DEM

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A four-band index for both liquid and solid water and its applications in the Aral Sea Basin

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Science China Earth Sciences 2024年第3期67卷 769-788页

作者： Bing YUE Xi CHEN Saibo LI Zhengping DU John WILSON Junhui YANG Yimen JIAO Shuangyan HUANG Chenghu ZHOU Xinjiang institute of Ecology and Geography Chinese Academy of SciencesUrumqi 830011China College of resources and Environment University of Chinese Academy of SciencesBeijing 100049China institute of Geographical Sciences and Natural resources Research Chinese Academy of SciencesBeijing 100101China Spatial Sciences institute University of Southern CaliforniaLos AngelesCA 90089-0374USA

Various investigations have been conducted to analyze the water-coverage area of the Aral Sea and the Aral Sea Basin(ASB). However, the investigations incorporated considerable uncertainty and the used water indices had misclassification problem, which made different research groups present different results. Thus we first ascertain the boundaries of the ASB, the Syr and Amu river basins as well as their upper, middle and lower reaches. Then a four-band index for both liquid and solid water(ILSW) is proposed to address the misclassification problems of the classic water indices. ILSW is calculated by using the reflectance values of the green, red, near infrared, and thermal infrared bands, which combines the normalized difference water index(NDWI) and land surface temperature(LST) together. Validation results show that the ILSW water index has the highest accuracy by far in the Aral Sea Basin. Our results indicate that annual average decline of the water-coverage area was 963 km^(2) in the southern Aral Sea, whereas the northern Aral Sea has experienced little change. In the meanwhile, permanent ice and snow in upper reach of ASB has retreated considerably. Annual retreating rates of the permanent ice and snow were respectively 6233and 3841 km^(2) in upper reaches of Amu river basin(UARB) and Syr river basin(USRB). One of major reasons is that climate has become warmer in ASB. The climate change has caused serious water deficit problem. The water deficit had an increasing trend since the 1990s and its increasing rates was 3.778 billion m^(3) yearly on average. The total water deficit was 76.967 billion m^(3) on average in the whole area of ASB in the 2010s. However, up reaches of Syr river basin(USRB), a component area of ASB, had water surplus of 25.461 billion m^(3). These conclusions are useful for setting out a sustainable development strategy in ASB.

关键词： Aral Sea Basin Syr river basin Amu river basin water indices water-coverage area water deficit Climate change

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Leaching kinetics and permeability of polyethyleneimine added ammonium sulfate on weathered crust elution-deposited rare earth ores

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Journal of Rare Earths 2024年第8期42卷 1610-1619,I0008页

作者： Huifang Yang Aoyang Sha Zhengyan He Chenjie Wu Yuanlai Xu Jingjing Hu Zhigao Xu Ru'an Chi Key Laboratory for Green Chemical Process of Ministry of Education School of Resources&Safety EngineeringWuhan Institute of TechnologyWuhan 430073China Key Laboratory of resources Conversion and Pollution Control of the State Ethnic Affairs Commission College of Resources and Environmental ScienceSouth-Central MinzuUniversityWuhan430074China

At present,in-situ leaching of weathered crust elution-deposited rare earth ores(WCE-DREOs) encounter with problems such as long leaching cycles,slow infiltration rate and low product *** order to solve the above problems,the conventional leaching agent ammonium sulfate((NH_(4))_(2)SO_(4)) was compounded with polymeric surfactant polyethyleneimine(PEI) to form a composite leaching *** effects of leaching temperature,PEI *** rate and pH on leaching kinetics and permeability of rare earths(RE) and aluminum(AI) in orebody were *** is found that with temperature increasing,the time required to reach leaching equilibrium for both RE and Al is shortened,the apparent activation energies of RE and AI are 14.79 and 13.45 kJ/mol,respectively,and the leaching processes are in accordance with the outer diffusion control,When the concentrations of(NH_(4))_(2)SO_(4) and PEI in the composite leaching agent are 2.0 wt% and 0.4 wt%;the time required to reach leaching equilibrium for RE and AI is about 50% shorter than that using(NH_(4))_(2)SO_(4) alone,and the leaching efficiencies of RE are slightly higher than that of *** increasing the temperature and flow rate of the composite leaching agent can improve the leaching efficiencies of RE and Al,but pH has neglected effects on the leaching efficiencies of *** PEI concentrations below 0,4 wt%, the addition of PEI promotes the leaching of RE and *** column leaching studies of the WCE-DREO,the addition of 0.4 wt% PEI to the traditional leaching agent(NH_(4))_(2)SO_(4) has no impact on the leaching efficiencies of ***,it can significantly increase the infiltration rate of WCE-DREO,shortening the leaching time per 10 mL effluent from about 30 min for(NH_(4))_(2)SO_(4) leaching system to 20 min for the composite leaching *** leaching time is shortened by one-third,and the leaching cost is reduced,which can provide theoretical guidance for the development and commercial implementa

关键词： Polyethyleneimine Kinetics Rare earths Permeability Activation energy

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