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China Geology 2025年第1期8卷 230-232页

作者： Yuan-yuan Feng Ya-dong Li An-kai Geng Liu-an Duan Da-dou Li No.1 geological Team of Shandong province Bureau of Geology and Mineral Resources Jinan 250100China Yantai geological survey Center of Coastal Zone China Geological SurveyYantai 264004China

*** Three stages of Mesozoic magmatic activity have been identified in the Jiaodong area,namely early magmatic emplacement,the magmatic emplacement prior to mineralization,and magmatic activity post-mineralization,fro... 详细信息

关键词： dating belt mineralization

Relationship Between Developmental Intensity of Landslide and Malan Loess Cohesion at a Regional Horizontal Space Scale

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Journal of Earth Science 2025年

作者： Yongheng Zhou Yaming Tang Bo Hong Fan Feng Longhui Wang Institute of geological survey， China University of Geosciences (Wuhan) Institute of Earth Environment， Chinese Academy of Sciences Xi'an geological survey Center China geological survey Chinese Academy of geological Sciences

Malan loess is highly water-sensitive， with its shear strength， particularly cohesive strength， significantly decreasing under the influence of water. The Western Shanxi Loess Plateau （WSLP） is especially prone to loess landslides， which are closely linked to rainfall infiltration. Understanding the regional variation of Malan loess cohesion (cm) and its distribution in relation to the developmental intensity of landslides in this area can provide essential scientific evidence for effective landslide prevention. Loess landslides and Malan loess were selected as the objects of study for the current research. The regional variation and distribution pattern of the cmwere revealed through undisturbed loess direct shear tests and Inverse Distance Weighting （IDW） interpolation. The relationship between the developmental intensity of landslide and the regional variation of the cmwas explored using the Cumulative Sum Variable Dimension Fractal （CSVDF）， Frequency Ratio （FR） model， and Certainty Factor （CF） model. The following conclusions were drawn: Results from the direct shear tests and IDW method indicate that the cmtends to decrease from south to north and exhibits a positively skewed spatial distribution pattern. The CSVDF results indicates a similarity between the regional variation of the cmand the development intensity of loess landslides. The FR and CF results reveal that loess landslides are more likely to occur when the cmis between 0 and 16.14 kPa.

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Distributions and risk assessment of heavy metals in solid waste in lead-zinc mining areas and across the soil, water body, sediment and agricultural product ecosystem in their surrounding areas

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China Geology 2025年第1期8卷 92-106页

作者： Zhi-qiang Wu Hai-ying Li Liu-yan Lü Guo-jun Liang Ting-ting Wu Jiang-xia Zhu No.117 geological Team Bureau of Geology and Mineral Exploration and Development of Guizhou ProvinceGuiyang 550023China Ecological Environment Monitoring Center of Guizhou province Guiyang 550023China Guizhou Institute of geological survey Guiyang 550081China Environmental Engineering Assessment Center of Anshun City Anshun 561000China Environmental Emergency Center of Anshun City Anshun 561000China

To identify the root causes of heavy metal contamination in soils as well as prevent and control such contamination from its sources,this study explored the accumulation patterns and ecological risks of heavy metals like Cd and Pb in solid waste in mining areas and across the water body,sediment,soil and agricultural product ecosystem surrounding the mining *** on the residual solid waste samples in lead-zinc deposits in a certain area of Guizhou province,along with samples of topsoils,irrigation water,river sediments,and crops from surrounding *** study analyzed the distributions of eight heavy metals,i.e.,Cd,As,Cr,Hg,Pb,Zn,Cu,and Ni,in the samples through field surveys and sample ***,this study assessed the contamination levels and ecological risks of heavy metals in soils,sediments,and agricultural products using methods such as the single-factor index,Nemerow composite index,and potential ecological risk *** results indicate that heavy metals in the solid waste samples all exhibited concentrations exceeding their risk screening values,with 60%greater than their risk intervention *** soils and sediments demonstrate slight and moderate comprehensive ecological risks of heavy *** single-factor potential ecological risks of heavy metals in both the soil and sediment samples decreased in the order of Hg,Cd,Pb,As,Cu,Zn,Cr,and Ni,suggesting the same sources of heavy metals in the soils and *** of the agricultural product samples exhibited over-limit concentrations of heavy metals dominated by Cd,Pb,Ni,and Cr,excluding Hg and *** agricultural product assessment using the Nemerow composite index reveals that 35%of the agricultural product samples reached the heavy metal contamination level,implying that the agricultural products from farmland around the solid waste dumps have been contaminated with heavy *** eight heavy metals in the soil,sediment,and agricultural product samples manifested hig

关键词： Lead-zinc mining area Solid waste Soil Water body Sediment Agricultural product Nemerow composite index Cd,Pb,Ni,Cr elements Heavy metal contamination Ecological risk assessment Coefficients of variation(CVs) Environmental restoration engineering

Experimental Analysis of Resistivity Logging Response of Marine Gas Hydrate Reservoirs

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Journal of Ocean University of China 2025年第1期24卷 85-94页

作者： CHEN Qiang LI Chengfeng WANG Hongbin LIU Changling BU Qingtao SUN Jianye WEI Jiangong KOU Beibei Key Laboratory of Gas Hydrate Ministry of Natural ResourcesQingdao 266071China Qingdao Institute of Marine Geology Ministry of Natural ResourcesQingdao 266071China Guangzhou Marine geological survey China Geological SurveySanya 572024China Guangdong Nanyou Holding Group Company Limited Guangzhou 510075China

Natural gas hydrates are widely distributed in marine and permafrost *** a novel energy resource,accurately describing reservoir characteristics and assessing energy potential is crucial for its commercial *** logging serves as a valuable approach for achieving these ***,due to inadequate comprehension of the electrical conductivity mechanism in hydrate-bearing sediments,existing data processing models still encounter certain *** study conducts both core-scale and pore-scale simulation experiments to examine the relationship between resistivity variations and the distribution of gas hydrate *** results indicate that the characteristics of resistivity variation is associated with the gas hydrate formation process,and the gas hydrate saturation index,denoted as‘n',varies between 0 and 3 depending on different gas hydrate distribution *** the saturation increases,gas hydrate distribution in pore spaces transitions from floating to contacting and cementing *** is proposed that the aqueous pore tortuosity can be utilized to correct the saturation index‘n'in Archie's *** on the analysis of experimental data,a correction method for Archie's equation is suggested,and its effectiveness in controlling relative error has been validated.

关键词： gas hydrate electrical resistivity Archie's equation pore connectivity micro distribution

Fresh insights into the onset of big mantle wedge beneath the North China Craton

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Acta Geochimica 2025年第1期44卷 145-162页

作者： Yingpeng Wang Xuance Wang Wen Zhang Xiaowei Yu Ligong Wang Jinhui Wang Peigang Zhu Yongbin Wang Shandong Institute of geological survey Ji’nan 250014People’s Republic of China Yunnan Key Laboratory of Earth System Science Yunnan UniversityEast Outer Ring RoadChenggong DistrictKunming 650500Yunnan ProvincePeople’s Republic of China Key Laboratory of Critical Minerals Metallogeny in Universities of Yunnan province Yunnan UniversityKunming 650500People’s Republic of China Radiogenic Isotope Facility School of Earth and Environment SciencesUniversity of QueenslandBrisbaneQLD 4072Australia

The onset of the big mantle wedge(BMW)structure beneath the North China Craton remains *** on the genesis of Late Mesozoic granites associated with gold deposits in the Jiaodong Peninsula above the BMW could provide fresh insights into this *** monzogranite from the Zhaoxian-Shaling gold district was intruded during 154-148 *** I-type granite has high-K calc-alkaline and metaluminous *** monzogranite formed at medium temperatures(718-770℃)and was generated in a thickened lower crust at depths within the stability field of *** monzogranite’s high zircon Ce^(4+)/Ce^(3+)and Eu_(N)/Eu_(N)^(*)values and low FeOT/MgO ratios,suggest that it formed in a high oxygen *** variableε_(Hf)(t)values with T_(DM2)of 1.93-2.87 Ga imply that it originated from the melting of ancient crust basement,with contributions from mantle-derived *** granite’s enrichment in LREEs and LILEs,and depletion in HREEs and HFSEs,along with its trace element tectonic discrimination diagrams and medium Sr/Y,indicate an adakite affinity in an active continental margin *** transition from S-type granites to I-type granites and finally to A-type granites observed in the eastern part of North China Craton suggests a shift in the tectonic environment from compression to *** change is also reflected in the transition from flat subduction to steep ***,the monzogranite was formed in a tectonic transition setting triggered by a change in the subduction angle of the PaleoPacific Ocean slab during the Late *** event may have marked the initiation of the BMW above the North China Craton.

关键词： Zircon U-Pb age Hf isotopic composition Jiaodong Peninsula North China Craton

Multiple-stage W mineralization in the Guanfang W deposit,southeastern Yunnan province,China:Insights from scheelite in-situ trace elemental and Sr isotopic analyses

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Acta Geochimica 2025年第1期44卷 112-127页

作者： Bin Sun Yi Liu Zhigang Kong Xuelong Liu Xiaojun Jiang Chao Li Wenchang Li Faculty of Land Resources Engineering Kunming University of Science and TechnologyNo.727 South Jingming RoadChenggong DistrictKunming City 650093Yunnan ProvinceChina Institute of Mineral Resources Chinese Academy of Geological SciencesNo.26 Baiwanzhuang StreetXicheng DistrictBeijing 100037China

The Guanfang large-scale W deposit is located in the W polymetallic ore concentration area of Bozhushan in southeastern Yunnan,*** extensive research,the fluid evolution process of the deposit remains ambiguous,leading to controversy regarding its *** study conducted a detailed field geological survey,with systematic sampling of the KT6 orebody,to delineate mineralization *** mineralogy work,including the use of CL images of scheelite,in-situ LA-ICP-MS trace elements,and Sr isotopes,was carried out on diff erent generations of scheelite formed in various *** findings identified the evolution of fluids in the mineralization process,shedding light on the genesis of the *** study revealed four mineralization stages at the Guanfang W deposit:prograde skarn stage,retrograde skarn stage,quartz-sulfide stage,and carbonate-fluorite *** erent generations of scheelite(Sch I,Sch II,Sch III)were observed in the first three stages,displaying distinct chondrite-normalized REE *** REE of Sch I mainly substituted into the Ca site by REE^(3+)+□_(Ca),and there may be a similar substitution of Nb for REE,whereas it is not the main substitution *** REE of Sch II mainly enter the scheelite lattice in the form of REE 3++Na+,and there may be a substitution of Nb for REE *** the early stage,The REE of Sch III was mainly replaced by Nb for REE isomorphism,while in the later stage,the replacement mode of REE^(3+)+□_(Ca)coexisted with *** Mo content in scheelite,along with the corresponding Eu anomalies in both scheelite and garnet,collectively imply that the ore-forming fluids during various mineralization stages were predominantly oxidizing,with only slight reducibility observed in Sch *** in-situ Sr isotope ratios of scheelite concentrates ranged from 0.7093 to 0.7153,resembling those of the Bozhushan granite,indicating a relationship between W mineralization and *** addition,the Y/Ho ratios of scheeli

关键词： Guanfang W deposit Trace elements of scheelite In-situ Sr isotopes Southeast Yunnan

A new exceptionally preserved corystosperm wood from the Jurassic of East Asia

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Science China Earth Sciences 2025年第3期68卷 803-810页

作者： Zikun JIANG Ning TIAN Yongdong WANG Fangyu LI Junling PEI Dieter UHL Ya LI Hao WU Zhenguo NING Ruiying HAO Chinese Academy of geological Sciences College of Palaeontology Shenyang Normal University Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences College of Resources and Environmental Engineering Guizhou University East China University of Technology Senckenberg Research Institute and Natural History Museum Frankfurt Zhejiang Museum of Natural History Department of Natural Resources of Shandong province

Corystosperms, an extinct group of “seed ferns” that lived from the late Permian to the Cretaceous or Eocene, are significant for seed plant phylogeny for their unique roles in partially resolving the long-standing question of angiosperm origins.A new fossil wood taxon, Fengweioxylon sinense gen. et sp. nov. is reported here based on exceptionally preserved wood material from the Jurassic in western Liaoning, China, whose peculiar wood structure enables it to be recognized as the first unequivocal fossil wood record of a corystosperm plant in Laurasia. The anatomical structures of this corystosperm wood show gymnospermous characters. The discovery of the new specimen will provide more anatomical evidence for understanding the systematic and affinity of this seed plants.

关键词： Corystosperms Fossil wood Laurasia Jurassic

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Cd Enrichment Characteristics and Bioavailability of Soil-crops in the Migration Type geological High Background Area of Poyang Lake，Jiangxi province

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Huanjing Kexue/Environmental Science 2025年第3期46卷 1774-1782页

作者： Wen, Bang-Yong Qie, Hai-Man Gao, Yuan Jiang, Hong-Yu Zhou, Qiang-Qiang Basic geological survey Institute of Jiangxi geological survey and Exploration Institute Nanchang330030 China Key Laboratory of Mine Environmental Monitoring and Improving Around Poyang Lake Ministry of Natural Resources East China University of Technology Nanchang330013 China Jiangxi Nonferrous geological Mineral Exploration and Development Institute Nanchang330030 China

To study the accumulation characteristics and bioavailability of Cd in the soil-crop system in the migration type geologically high background area，140 groups of crops and soil samples were collected from the Jiulong area on the south bank of Poyang Lake. The results showed that the range of ω （Cd） of root soil was 0.03-0.65 mg·kg-1，with an average of 0.16 mg·kg-1，which exceeded the background value of soil in Jiangxi province，reflecting the characteristics of high geological background of migration type. The over-standard rate of Cd in root soil was 6.43%，which was slightly polluted. Sesame had the strongest enrichment ability of Cd （404%），followed by that of peanut （146%）. The enrichment ability of rice，Camellia oleifera，and Euryale seed was medium，while that of corn was weak. The root soil ω （active Cd） was 76.8 μg·kg-1，and the bioavailability was 48.9%，among which rice was the highest with 98.6 μg·kg-1 and 59.9%，respectively. Principal component analysis （PCA） showed that root soil Cd was mainly caused by the transport and accumulation of industrial and mineral pollutants in the upstream，reflecting the characteristics of the high geological background of the transport type. Correlation showed that the active and bioavailable Cd of root soil were mainly controlled by genetic sources，indicating that the activity of exogenously imported Cd was higher，and the ecological risk was higher. © 2025 Science Press. All rights reserved.

关键词： River pollution

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Multi-mechanism Orogenic Model of the Su-Jiao Orogenic Belt

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Acta Geologica Sinica(English Edition) 2000年第2期74卷 201-206页

作者： FAN Jintao CHEN Jiongda CHEN Huogen geological survey of jiangsu province Nanjing 211135Jianesu

The Su-Jiao orogenic belt is the eastern part of the Central Mountain System of China. Recent studies on its orogenic system indicate that the Su-Jiao orogenic belt is a complex orogenic belt which suffered at least 3 orogenies of different mechanisms in the Mesoproterozoic, Neoproterozoic and Triassic respectively. The Meso-Neoproterozoic orogenies belong to the Wilson cycle on the plate margins. The belt is a part of the Late Mesoproterozoic supercontinent Rodinia. The Triassic orogeny belongs to the re-orogeny of the non-Wilson cycle. Delamination of mountain roots occurred after both the Wilson and non-Wilson cycles in the Su-Jiao orogenic belt. The large-amplitude isostatic uplift of mountains, magmatic activities and basin-forming and mountain-making in the upper crust, all indicate the general significance of delamination in the development of orogenic belts.

关键词： orogenic system multi-mechanism re-orogeny Su-Jiao orogenic belt

Quantitative study on vertical distribution of heat flow in Niutuozhen geothermal field, Xiong'an New Area—Evidence from heat flow determination in the Archean of D01 well

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Journal of Groundwater Science and Engineering 2025年第1期13卷 22-33页

作者： Ya-hui Yao Xiao-feng Jia Sheng-tao Li Jun-yan Cui Hong Xiang Dong-dong Yue Qiu-xia Zhang Zhao-long Feng Center for Hydrogeology and Environmental Geology China Geological Survey Tianjin 300304 China Tianjin Engineering Center of Geothermal Resources Exploration and Development Tianjin 300304 China School of Resource and Earth Science China University of Mining and Technology Xuzhou 221116 Jiangsu China Technology Innovation Center for geological Environment Monitoring Engineering MNR Tianjin 300304 China Chinese Academy of geological Sciences Beijing 100037 China

The karst geothermal reservoir in Xiong'an New Area is a representative example of an ancient buried hill geothermal system. However, published heat flow data are predominantly derived from the Cenozoic sedimentary cap. Due to the limited depth of borehole exploration, heat flow measurements and analyses of the Archean crystalline basement in the study area are rare. Further investigation of the heat flow and temperature field characteristics within the Archean crystalline basement beneath the karst geothermal reservoir is necessary to understand the vertical distribution of heat flow and improve the geothermal genetic mechanism in the area. The D01 deep geothermal scientific drilling parameter well was implemented in the Niutuozhen geothermal field of Xiong'an New Area. The well exposed the entire Gaoyuzhaung Formation karst geotheremal reservoir of the Jixian system and drilled 1,723.67 m into the Archean crystalline basement, providing the necessary conditions for determining its heat flow. This study involved borehole temperature measurements and thermophysical property testing of core samples from the D01 well to analyze the vertical distribution of heat flow. The findings revealed distinct segmentation in the geothermal gradient and rock thermophysical properties. The geothermal reservoir of Gaoyuzhuang Formation is dominated by convection, with significant temperature inversions corresponding to karst fracture developments. In contrast, the Archean crystalline basement exhibits conductive heat transfer. After 233 days of static equilibrium, the average geothermal gradients of the Gaoyuzhuang Formation and the Archean crystalline basement were determined to be 1.5°C/km and 18.3°C/km, respectively. These values adjusted to −0.8°C/km and 18.2°C/km after 551 days, with the longer static time curve approaching steady-state conditions. The average thermal conductivity of dolomite in Gaoyuzhuang Formation was measured as 4.37±0.82 W/(K·m), and that of Archean gneiss

关键词： Heat flow vertical difference Archean crystalline basement Thermal conductivity Niutuozhen geothermal field Present-day temperature field Geothermal genetic mechanism D01 well