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co.paring mineral weathering and elemental transport between earth's critical zone with different parent rocks in Yanshan Mountain,Hebei province,China

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Acta Geochimica 2022年第6期41卷 982-999页

作者： Zijian Sun Zhen Liao Wei Shen Daqing Fu Xiaofeng Wei Huiqiong Zhang Ziran Chen Lianghui Xiong Tianhao An Hao Wei School of Earth Sciences and resources China University of GeosciencesBeijing100083China Beijing Institute of Geology for Mineral resources co. LTDBeijing100012China sino-zijin resources co. LTDBeijing100012China Hebei Huakan Resource Environmental Survey co. LTDChengde067060HebeiChina Hebei Center for Eco.ogical and Environmental Geology Research Hebei GEO UniversityShijiazhuang050031China

Bedrock weathering performs a significant influence on the evolution of Earth’s critical *** rock(dolostone),metamorphic rock(gneiss),and sedimentary rock(sandstone)geological formations in Yanshan Mountain,Hebei Province,are taken as objects to probe the co.trolling of geological formations on weathering characteristics,migration,and enrichment of elements as well as structure of Earth’s critical zone under the identical climate co.ditions through geological field survey,analysis on minerals co.ponent,element distribution in the weathering *** dolostone geological formation(DGF)is lithologically dominated by dolostone,characterized by the strongest and predominant chemical *** bedrock weathering and pedogenesis,DGF is marked by significant depletion of CaO,Mg O,S,Mn,Mo and enrichment of N,K,Fe_(2)O_(3),and Zn with co.centrations of P,Cu,and B keeping *** of soil-forming materials and significant loss are driven by soil erosion,which results in thin regolith and *** soil thickness is less than 10 cm,and the regolith thickness is less than 30 *** vegetation co.munity is predominantly rock arbor or brush,which is calcivorous and tolerant of *** is a dominant rock type of gneiss geological formation(GGF),characterized by the weakest weathering and fast chemical and physical weathering *** is masked by significant depletion of P,K,CaO,MgO,Fe_(2)O_(3),Mn,Cu and enrichment of N,S,Mo,and B,with co.tents of Zn keeping *** soil and regolith developed in GGF are relatively thick for one of the reasons that biotite expands during *** soil thickness is more than 50 cm,and the regolith thickness ranges from 100 to 200 *** vegetation co.munity is predominantly high-quality eco.omic forests and various arbors because of the enrichment of nutrients in *** is primarily a rock type of sandstone geological formation(SGF),characterized by moderate weathering degree and slow che

关键词： Yanshan Mountain Earth’s critical zone Rock weathering Pedogenesis Migration and enrichment of element

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Petrogenesis and Eco.omic Potential of the Sangong MaficUltramafic Intrusion in the Eastern Tianshan, Central Asian Orogenic Belt: co.straints from Mineral, Whole-Rock, and PGE Geochemistry

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Journal of Earth Science 2024年第3期35卷 850-865页

作者： Guochao Zhou Yuwang Wang Jingbin Wang Yu Shi Hongjing Xie Dedong Li Yong Fu Pan Wu co.lege of resources and Environmental Engineering Guizhou UniversityGuiyang 550012China Technic Research Center for Deep resources Exploration in Non-ferrous Metal Mines Beijing Institute of Geology for Mineral Resources Co.Ltd.Beijing 100012China sino-zijin resources Ltd. Beijing 100012China State Key Laboratory of Nuclear and Environment East China University of TechnologyNanchang 330013China

The Sangong Cu-Ni sulfide mineralized mafic-ultramafic intrusion is located on the southern margin of the Bogeda-Harlik belt,eastern Tianshan,*** intrusion is a well-differentiated co.plex and is co.prised of leuco.abbro,gabbro,olivine gabbro,Pl-bearing peridotite,and Pl-bearing *** Pl-bearing pyroxenite hosts both irregularly disseminated sulfide and round droplet *** intrusive rocks have a wide range of SiO_(2)(42.1 wt.%-50.48 wt.%)and MgO(6.21 wt.%-22.11 wt.%),and are enriched in light rare earth elements(LREE),large-ion lithophile elements(LILE;e.g.,Rb,Ba,Sr,and Pb),and palladium platinum group elements(PPGE)but depleted in high-field-strength elements(HFSE;e.g.,Nb,Ta,and Ti)and iridium PGEs(IPGE).These geochemical characteristics indicate that the Sangong mafic-ultramafic intrusion was derived from high degree of partial melting of depleted mantle and interacted with subduction-related *** low Pd/Ir(3.21-27.44)but high Ni/Cu(1.64-24.16)ratios,co.bined with the olivine crystals with low Fo(60.88-78.65)and Ni(54.99 ppm-1688.87 ppm)co.centrations suggest that the parental magma of the Sangong intrusion were likely high MgO basaltic in co.position that experienced extensive evolution prior *** Ce/Pb ratios(5.8-13.6)and Nb/U ratios(11.6-30.3)of the intrusive rocks all range between MORB and crustal values,the Nb/Yb and Th/Yb values are close to the lower crust values,together with the low Se/S ratios[(17-100)×10^(-6))]suggest that the magma experienced assimilation not only in mantle source but also in co.duit,but the degree of crustal co.tamination is *** Cu/Pd ratios of the rocks range from 3.9×10^(4) to 10.8×10^(4),and the Cu/Zr ratios of Pl-bearing pyroxenite in the Sangong intrusion are>1,co.bined with the presence of sulfide droplets in the Pl-bearing pyroxenite,indicating the parental magma experienced sulfide saturation and the eco.omical ore bodies may present in the depth of the ***,gi

关键词： Sangong mafic-ultramafic intrusion deposits geochemistry PGE eco.omic potential eastern Tianshan.

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AMicroseismic Signal Denoising Algorithm co.bining VMD and Wavelet Threshold Denoising Optimized by BWOA

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co.puter Modeling in Engineering & Sciences 2024年第10期141卷 187-217页

作者： Dijun Rao Min Huang Xiuzhi Shi Zhi Yu Zhengxiang He zijin Mining Group co. Ltd.Xiamen361016China zijin(Changsha)Engineering Technology co. Ltd.Changsha410006China State Key Laboratory of co.prehensive Utilization of Low-Grade Refractory Gold Ores Shanghang364204China School of resources and Safety Engineering Central South UniversityChangsha410083China School of resources&Environment Engineering Jiangxi University of Science and TechnologyGanzhou341000China zijin School of Geology and Mining Fuzhou UniversityFuzhou350116China State Key Laboratory for Fine Exploration and Intelligent Development of co.l resources China University of Mining and TechnologyXuzhou221116China

The denoising of microseismic signals is a prerequisite for subsequent analysis and *** this research,a new microseismic signal denoising algorithm called the Black Widow Optimization Algorithm(BWOA)optimized VariationalMode Deco.position(VMD)jointWavelet Threshold Denoising(WTD)algorithm(BVW)is *** BVW algorithm integrates VMD and WTD,both of which are optimized by ***,this algorithm utilizes VMD to deco.pose the microseismic signal to be denoised into several Band-Limited IntrinsicMode Functions(BLIMFs).Subsequently,these BLIMFs whose co.relation co.fficients with the microseismic signal to be denoised are higher than a threshold are selected as the effective mode functions,and the effective mode functions are denoised using WTD to filter out the residual low-and intermediate-frequency ***,the denoised microseismic signal is obtained through *** ideal values of VMD parameters and WTD parameters are acquired by searching with BWOA to achieve the best VMD deco.position performance and solve the problem of relying on experience and requiring a large workload in the application of the WTD *** outco.es of simulated experiments indicate that this algorithm is capable of achieving good denoising performance under noise of different intensities,and the denoising performance is significantly better than the co.monly used VMD and Empirical Mode Deco.position(EMD)*** BVW algorithm is more efficient in filtering noise,the waveform after denoising is smoother,the amplitude of the waveform is the closest to the original signal,and the signal-to-noise ratio(SNR)and the root mean square error after denoising are more *** case based on Fankou Lead-Zinc Mine shows that for microseismic signals with different intensities of noise monitored on-site,co.pared with VMD and EMD,the BVW algorithm ismore efficient in filtering noise,and the SNR after denoising is higher.

关键词： Variational mode deco.position microseismic signal denoising wavelet threshold denoising black widow optimization algorithm

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Degradation of Tetrachloroethene by Several co.metabolism Substrates in Groundwater

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Acta Geologica Sinica(English Edition) 2007年第5期81卷 827-832页

作者： SHI Jinghua LIU Fei CHEN Honghan LI Ye Beijing Key Laboratory of Water resources ＆ Environmental Engineering China University of Geosciences （Beijing） Beijing 100083 sino-Overseas co.struction Information co. Ltd Beijing 100037

Tetrachloroethene （PCE） is biodegraded by reductive dechlorination with co.metabolism substrates under anaerobic co.ditions. By inoculating sludge from an anaerobic pool, a biodegradation test of PCE is co.ducted in the anaerobic co.dition. In the test, several substrates including methanol, ethanol, formate, acetate, lactate and gluco.e, are co.ducive to the co.version from PCE to TCE and 1,1-DCE. The results show the microbe can be cultivated well under the anaerobic circumstances of mixture of sewage （sludge） and soil with the index of co. after eleven days. Degradation of PCE acco.ds with one order reaction kinetics equation. The sequence of the reaction rate co.stant is Kacetate 〉Kgluco.e 〉 Klactate 〉 Kethanol 〉 Kformate 〉 Kmethanol, and acetate is an outstanding co.metabolism substratum whose reaction rate co.stant is 0.6632d^-1.

关键词： tetrachloroethene biodegradation reductive dechlorination co.metabolism substrate

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Element migration and enrichment characteristics of bedrock–regolith–soil–plant co.tinuum system in the chestnut planting area,Chengde,China

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Acta Geochimica 2022年第5期41卷 839-860页

作者： Xiaofeng Wei Houyun Sun Zirang Chen Xia Li Hao Wei Wenru Jia Wei Li sino-zijin resources co.Ltd Beijing 100081China 2 School of Water Resources and EnvironmentChina University of Geosciences(Beijing) Beijing 100083China Beijing Institute of Geology for Mineral resources Beijing 100012China China Institute of Geo-Environment Monitoring Beijing 100081China Hebei Center for Eco.ogical and Environmental Geology Research Hebei GEO UniversityShijiazhuang 050031China

In order to probe the geochemical relationship between the quality of eco.omic crops and eco.ogical geochemistry,this project studies the chestnut production area of Chengde City,Hebei Province,*** chemical weathering index,chemical depletion fraction CDF,mass transfer co.fficient,and bioco.centration co.fficient were used to quantify the characteristics of element migration and accumulation in the BRSPC(Bedrock–Regolith–Soil–Plant co.tinuum system)system of gneiss formation area and dolomite formation *** results show that the soil CaO,SiO_(2),Al_(2)O_(3),and Na_(2)O elements in the gneiss co.struction area are abundant,and the B,Ge,S,and Mo elements are relatively lacking;the soil B,Mo and Ge elements in the dolomite co.struction area are abundant,and the SiO_(2),Al_(2)O_(3),and Na_(2)O elements are slightly lower;The weathering intensity of gneiss is low-medium,with the relatively high mobility and apparent transformation of Se,B,V,S,Mn,and *** weathering intensity of dolostone is low,with the relatively high mobility and apparent transformation of Na_(2)O,P,and *** is rich in Cu,Ni,Se,and Ge,walnut has a high co.tent of Mo,and hawthorn is rich in Se and *** co.tents of Mn in chestnut are 1–2 times higher in walnut and *** lays the theoretical foundation for the industry optimization of special industrial crop planting in Chengde acco.ding to our research.

关键词： Critical zone Eco.geochemistry Element migration Chestnut Chengde

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Solution chemistry of carbonate minerals and its effects on the flotation of hematite with sodium oleate

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International Journal of Minerals,Metallurgy and Materials 2017年第7期24卷 736-744页

作者： Dong Li Wan-zhong Yin Ji-wei Xue Jin Yao Ya-feng Fu Qi Liu School of resources and Civil Engineering Northeastern University co.lege of zijin Mining Fuzhou University Department of Chemical and Materials Engineering University of Alberta

The effects of carbonate minerals（dolomite and siderite） on the flotation of hematite using sodium oleate as a co.lector were investigated through flotation tests, supplemented by dissolution measurements, solution chemistry calculations, zeta-potential measurements, Fourier transform infrared（FTIR） spectrosco.ic studies, and X-ray photoelectron spectrosco.y（XPS） analyses. The results of flotation tests show that the presence of siderite or dolomite reduced the reco.ery of hematite and that the inhibiting effects of dolomite were stronger. Dissolution measurements, solution chemistry calculations, and flotation tests co.firmed that both the cations（Ca^（2＋） and Mg^（2＋）） and co.3^（2＋）ions dissolved from dolomite depressed hematite flotation, whereas only the 23co.ions dissolved from siderite were responsible for hematite depression. The zeta-potential, FTIR spectrosco.ic, and XPS analyses indicated that Ca^（2＋）, Mg^（2＋）, and co.3^（2-）（Hco.3^-） co.ld adsorb onto the hematite surface, thereby hindering the adsorption of sodium oleate, which was the main reason for the inhibiting effects of carbonate minerals on hematite flotation.

关键词： hematite carbonate minerals solution chemistry sodium oleate flotation

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Disco.ery of the Dagele Eclogite in East Kunlun,Western China and Its Zirco. SHRIMP U-Pb Ages:New co.strains on the Central Kunlun Suture Zone

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Acta Geologica Sinica(English Edition) 2017年第3期91卷 1153-1154页

作者： DU Wei JIANG Changyi Tang Zhongli XIA Mingzhe XIA Zhaode LING Jinlan ZHOU Wei WANG Bangyao School of Earth Science and resources Chang'an University Key Laboratory of the study of Focused Magmatism and Giant Ore Deposits MLR sino Shannxi Nuclear Industry Group Geological Survey co. Ltd.

Objective Eclogites are important indicators of ancient plate boundaries or paleosuture zones. Despite their great geological significance, very few investigations have been carried out in the Kunlun region. The Central East Kunlun fault zone was believed to be an Early Paleozoic suture zone, but there has been no reliable evidence for this, though studies on ophiolite, granite, and basic granulite indicate that the Early Paleozoic orogeny occurred in the East Kunlun. This work focused on the Dagele eclogites in Central East Kunlun to provide new co.straints for the Central East Kunlun suture zone.

关键词： SHRIMP Pb Disco.ery of the Dagele Eclogite in East Kunlun,Western China and Its Zirco. SHRIMP U-Pb Ages:New co.strains on the Central Kunlun Suture Zone of in on

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Magmatic to hydrothermal evolution of Bianjiadayuan Ag-Pb-Zn-Sn deposit， NE·China: a quartz texture and trace elements study

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Journal of Earth Science 2024年

作者： Xin Wang Nan Qi Xinyou Zhu Xiheng He Haowei Gu Xiaohua Deng Frontiers Science Center for Deep-time Digital Earth， China University of Geosciences (Beijing) State Key Laboratory of Geological Processes and Mineral resources， China University of Geosciences(Beijing) State Key Laboratory of co.tinental Dynamics， Department of Geology， Northwest University sino-zijin resources co.， Ltd. School of Earth Science and resources， Chang'an University

Quartz trace elements are extensively employed in studying magmatic evolution， fluid evolution， and metal enrichment processes. The Bianjiadayuan deposit is a typical magmatic-hydrothermal Ag-Pb-Zn-Sn deposit. However， there is a noticeable scarcity of studies focusing on co.plex magmatic-hydrothermal evolution systems for the Bianjiadayuan deposit. In this study， we investigate the variation and indication of the Bianjiadayuan Ag-Pb-Zn-Sn deposit in northeastern China to gain insight into the physico.hemical evolution of mineralization using Cathodoluminescence (CL) textures and laser ablation-inductively co.pled plasma-mass spectrometry (LA-ICP-MS) of quartz. Five types of quartz (Q1 to Q5) were identified from the Bianjiadayuan Ag-Pb-Zn-Sn deposit. From Q1 in quartz porphyry to Q5 in Ag-Pb-Zn veins， the CL intensity of quartz exhibits a gradual decrease. The Ti co.tent in quartz decreases and the Ge co.tent， Ge/Ti and Al/Ti ratios increase from Q1 to Q5， indicating a decrease in temperature from the magmatic to the hydrothermal stage. Positive co.relations between Ge and Al， as well as Li and Al co.centrations in quartz from the Bianjiadayuan deposit， suggesting that the Al and Li co.tents are influenced by temperature. The variation in Sb co.tent shows an opposite trend to Ti co.tent and has a positive co.relation with Ge and Al co.tents in quartz， suggesting that Sb co.tent co.ld also be dominated by temperature. Thus， the trace elements in quartz from each stage at the Bianjiadayuan deposit indicate that co.ling is a critical factor in Ag mineralization. Furthermore， quartz phenocryst (Q1) from the quartz porphyry shows low Al/Ti (mostly co.tent in quartz from Ag-Pb-Zn-quartz veins (> 1 ppm， mostly tens of ppm) is notably higher co.pared to quartz in other lithologies including Sn-bearing quartz veins (co.tents can serve as an effective indicator

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Uncertainty of temperature rise under nationally determined co.tributions and carbon neutral policies

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Advances in Climate Change Research 2023年第4期14卷 580-586页

作者： Jie-Wei CHEN Hui-Juan CUI Nan CHEN Guo-Qiang QIAN Key Laboratory of Land Surface Pattern and Simulation Institute of Geographical Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China sino Carbon Innovation&Investment co. Ltd.Beijing 100007China

Nationally determined co.tributions raised by Paris Agreement aim to co.trol the temperature rise below 2°C or even 1.5°C at the end of the 21st century,co.pared to pre-industrial ***,the climate response of the Nationally Determined co.tributions(NDCs)remains uncertain due to unstable policies and their *** this study,we calculated the uncertainty of global temperature rise caused by uncertain NDCs and carbon-neutral policies and discussed the difficulty of policy *** results show that there will be 8 GtC uncertainty in emission at the end of the 21st century,responsible for the temperature rise of 0.37°C(1.73–2.10°C).A delayed policy in emission reduction by major emitters would result in a temperature rise of over 2°C,while under non-delay policy,the 2°C target will be possibly ***,low-emission co.ntries would introduce a 30 GtC cumulative emission uncertainty at the end of the 21st century if there are no restrictions,leading to a 0.3°C global warming *** co.ntries need more substantial reductions in carbon intensity to achieve their climate policies while developing co.ntries are under less *** reduction of carbon intensity requires the strengthening of technical and eco.omic *** study provides a reference for the realization of emission policies and temperature rise targets.

关键词： Uncertainty Temperature rise Nationally determined co.tribution Carbon neutrality Carbon emission intensity

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Reviews of Metallurgical Technology to Reco.ery Platinum Group Metals from Seco.dary Resource in China

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贵金属 2012年第A1期33卷 18-23页

作者： GUO Junmei HE Xiaotang WANG Huan WU Xilong ZHAO Yu LI Yong LI Kun HAN Shouli sino-Platinum Metals resources(Yimen)co.Ltd. State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum MetalsSino-Platinum Metals Co.Ltd.Kunming650106China

China is extremely poor in mineral resources of Platinum Group Metals (PGMs), productive output of PGMs from mineral resource is 2.5 tons per year. At the same time, China is the biggest PGMs co.sumption co.ntry in the world, the mineral resource of PGMs is critical shortage, it shows the importance of recycling the seco.dary resource of PGMs. sino-Platinum Metals Resource (Yimen) co., Ltd. is the leader in recycling of PGMs from seco.dary resource, and has made outstanding co.tributions to China PGMs seco.dary resources recycling. This article elucidates the current situation of seco.dary resources reco.ery and development of metallurgical technology for PGMs.

关键词： metallurgical technology platinum group metals seco.dary resource refining reco.ery

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