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Journal of Ocean University of China 2024年第3期23卷 721-730页

作者： LI Anlong WANG Panpan GUO Xijun JI Xiangkun SHEN Kunming LIN Lin YAN Zhichao YUAN Lin Key Laboratory of Submarine Geosciences and Prospecting Techniques Ministry of Education and College of Marine GeosciencesOcean University of ChinaQingdao 266100China co.lege of Marine Geoscience Ocean University of ChinaQingdao 266100China China co.struction Seco.d Engineering Bureau co. LTDYueyang 414000China Tianjin Research Institute for Water Transport Engineering M.O.T.Tianjin 3000456China Lianyungang Xuwei Port Holding Group co. Ltd.Lianyungang 222042China

The co.prehension of sediment grain size parameters and the co.responding sedimentary environment holds paramount importance in elucidating the engineering geological attributes of the subaqueous *** study delineated the sedimentary environment zoning in the northern sea area of Qingdao through cluster analysis of grain size parameters derived from 123 surface sediment *** study analyzed the co.relation between sediment geotechnical indices and grain size parameters across diverse sedimentary environments.A co.relation equation was established for samples exhibiting a strong *** study found four distinct sedimentary environments in the study area:co.stal,transitional,shallow sea,and *** the same sedimentary environment,the average grain size and sorting co.fficient exhibit significant co.relations with geotechnical indices such as water co.tent,density,shear strength,plastic limit,liquid limit,and plastic ***,notable disparities in the co.relation between grain size parameters and geotechnical indices emerge across different sedimentary environments.

关键词： grain size parameters cluster analysis sedimentary environment co.relations geotechnical indexes

Genesis of the Shijia Gold Deposit， Jiaodong Peninsula， China: co.straints from Fluid Inclusions and Stable Isotopes

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Journal of Earth Science 2024年

作者： Liqiang Feng Ruiwen Shen Xuexiang Gu Yongmei Zhang Zhanlin Ge Yingshuai Zhang Yu He Natural Resources co.prehensive Survey co.mand Center China geological Survey Ha'erbin Natural Resources Survey co.mand Center China geological Survey School of Earth Sciences and Resources， China University of Geosciences State Key Laboratory of geological Processes and Mineral Resources， China University of Geosciences Beijing Xi'an Mineral Resources Survey Center China geological Survey Department of Natural Resources of Liangshan Yi Autonomous Prefecture

The Shijia gold deposit， situated in Penglai City， Shandong Province， is distinguished by its fracture-filling auriferous quartz-sulfide veins. Studies of fluid inclusions and stable isotopes （H-O-C-S） were co.ducted on this deposit， revealing that the auriferous quartz primarily co.tains four types of fluid inclusions: co.-H2O inclusions， pure co.inclusions， two-phase aqueous inclusions， and solid mineral-bearing multiphase inclusions. The ore-forming fluids of Shijia belong to a heterogeneous H2O-co.-NaCl system， characterized by moderate to high temperatures （187–386 ℃）， low to high salinities (0.2%–41.2% NaCleq)， and low densities (0.72–1.07 g/cm3). Fluid immiscibility and fluid-rock interaction may have occurred at Shijia， with mineralization depths ranging from 3.3 to 3.9 km. The δD and δ18OH2Ovalues of auriferous quartz vary from -86.1‰ to -79.1‰ and from 9.4‰ to 10.5‰， respectively， suggesting that the ore-forming fluids are of magmatic origin. Carbon isotope co.positions of the hydrothermal calcite （-3.31‰ to -0.86‰） indicate the carbon might be related to a mantle source that was co.taminated by marine carbonates. The positive δ34S values of sulfides （4.3‰–7.3‰） reflect that the ore-forming materials may be sourced from the metasomatized lithospheric mantle beneath the North China Craton， related to the subduction of the Yangtze Craton in the Triassic. co.lectively， the evidence from geology， fluid inclusion and H-O-C-S isotopes indicate that the Shijia gold deposit is of magmatic-hydrothermal origin and related to the Guojialing granite formed by the mixing of crust- and mantle-derived magmas.

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Runout prediction of potential landslides based on the multi-source data co.laboration analysis on historical cases

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China Geology 2024年第2期7卷 264-276页

作者： Jun Sun Yu Zhuang Ai-guo Xing Guizhou Geology and Mineral Engineering co.struction co. LtdGuiyang 550000China State Key Laboratory of Ocean Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Long runout landslides involve a massive amount of energy and can be extremely hazardous owing to their long movement distance,high mobility and strong destructive *** methods have been widely used to predict the landslide runout but a fundamental problem remained is how to determine the reliable numerical *** study proposes a framework to predict the runout of potential landslides through multi-source data co.laboration and numerical analysis of historical landslide ***,for the historical landslide cases,the landslide-induced seismic signal,geophysical surveys,and possible in-situ drone/phone videos(multi-source data co.laboration)can validate the numerical results in terms of landslide dynamics and deposit features and help calibrate the numerical(rheological)***,the calibrated numerical parameters can be used to numerically predict the runout of potential landslides in the region with a similar geological setting to the reco.ded *** of the runout prediction approach to the 2020 Jiashanying landslide in Guizhou,China gives reasonable results in co.parison to the field *** numerical parameters are determined from the multi-source data co.laboration analysis of a historical case in the region(2019 Shuicheng landslide).The proposed framework for landslide runout prediction can be of great utility for landslide risk assessment and disaster reduction in mountainous regions worldwide.

关键词： Landslide runout prediction Drone survey Multi-source data co.laboration DAN3D numerical modeling Jianshanying landslide Guizhou Province geological hazards survey engineering

Modularized and Parametric Modeling Technology for Finite Element Simulations of Underground Engineering under co.plicated geological co.ditions

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co.puter Modeling in Engineering & Sciences 2024年第7期140卷 621-645页

作者： Jiaqi Wu Li Zhuo Jianliang Pei Yao Li Hongqiang Xie Jiaming Wu Huaizhong Liu State Key Laboratory of Hydraulics and Mountain River Engineering College of Water Resource and HydropowerSichuan UniversityChengdu610065China Research Institute of Testing and Inspection Sinohydro Bureau 7 Co.Ltd.Chengdu610213China

The surrounding geological co.ditions and supporting structures of underground engineering are often updated during co.struction,and these updates require repeated numerical *** improve the numerical modeling efficiency of underground engineering,a modularized and parametric modeling cloud server is developed by using Python *** basic framework of the cloud server is as follows:input the modeling parameters into the web platform,implement Rhino software and FLAC3D software to model and run simulations in the cloud server,and return the simulation results to the web *** modeling program can automatically generate instructions that can run the modeling process in Rhino based on the input modeling *** main modules of the modeling program include modeling the 3D geological structures,the underground engineering structures,and the supporting structures as well as meshing the geometric *** particular,various cross-sections of underground caverns are crafted as parametricmodules in themodeling *** and parametric modeling program is used for a finite element simulation of the underground powerhouse of the Shuangjiangkou Hydropower *** co.plicatedmodel is rapidly generated for the simulation,and the simulation results are ***,this modularized and parametric modeling program is applicable for three-dimensional finite element simulations and analyses.

关键词： Underground engineering modularized and parametric modeling finite element method co.plex geological structure cloud modeling

Application of Horizontal Well Seismic Geo-Steering Technology in XX Block Development

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Open Journal of Yangtze Oil and Gas 2024年第3期9卷 65-74页

作者： Xuecheng Jia Xiaoyi Cheng Hui Ma Shilei Lu Xin Yang Shuo Wang Xiang Li BGP geological Research Center Inc. CNPC Zhuozhou China No.6 Oil Production co.pany Petro China Changqing Oilfield Company CNPC Xian China Pipe China Group Beijing Pipe co. Ltd. Beijing China

During the development phase horizontal wells are very efficient way to improve the production in the deep co.l bed methane. The 8# co.l seam in the XX block on the eastern edge of the Ordos Basin has challenges such as deep burial depth (>2000 m), thin co.l sweet spot (3 m), and significant short-distance structural fluctuations. The challenges caused a high risk of missing targets and running out of the target layers, as well as difficulties in cementing and co.pletion due to uneven well trajectories. To address these challenges, this paper focuses on solving the issues through detailed precise geological modeling, optimized trajectory design, and accurate seismic geology Steerable Drilling. 1) Based on reasonable velocity field co.struction and Time-Depth transformation, a precise directional model is co.structed using the layer-by-layer approximation principle with reference to marker layers, improving the accuracy of the target spot and avoiding premature or delayed entry into the target;2) Based on a precise geological model, the dip angle of the strata ahead and the development of sweet spots are clearly defined, enabling optimized trajectory design for horizontal wells;3) Using “1 + N” dynamic modeling to update the geological model in real-time during the drilling process, and actively guide the drill bit through the horizontal segment smoothly by using multi-information judgment of the drill bit position. The actual drilling of 80 co.pleted horizontal wells in this area show: That this approach effectively ensures the smooth trajectory and high-quality drilling rate of the horizontal well in the co.l seam, providing a basis for subsequent hydraulic fracturing and increasing single-well production. At the same time, it has certain potential value and significance for similar co.lbed methane developments under similar geological co.ditions.

关键词： Seismic Geo-Steerable Horizontal Wells co.lbed Methane Marker Layers

co.tamination assessment,source apportionment and associated health risks of PTEs in agricultural soil under five land-use patterns in Sanya,China

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China Geology 2024年第3期7卷 469-479页

作者： Jian-zhou Yang Yan-gang Fu Qiu-li Gong Sheng-ming Ma Jing-jing Gong Jian-weng Gao Zhen-liang Wang Yong-wen Cai Shi-xin Tang Institute of Geophysical and Geochemical Exploration Chinese Academy of Geological SciencesChina Geological SurveyLangfang 065000China Key Laboratory of co.pling Process and Effect of Natural Resources Elements Ministry of Natural ResourcesBeijing 100055China

To understand the levels of potentially toxic elements(PTEs)co.tamination in soils and their effects on human health from different agricultural land use in Sanya,China.128 soil samples(64 topsoil samples and co.responding subsoil samples)were co.lected from the five representative land-use *** co.pled plasma mass spectrometry(ICP-MS),Atomic fluorescence spectrometry(AFS),and Inductively co.pled plasma optical emission spectrometry(ICP-OES)were used to determine the co.tent of PTEs(As,Cd,Hg,Cu,Cr,Ni,Pb,Zn,co.Mo,Sb,and V).co.relation analysis and factor analysis were used to determine the source of ***-accumulation index(I_(geo)),hazard quotient(HQ),and total carcinogenic risk index(TR)were used to measure the PTEs co.tamination and its relative health *** showed that the average values of 12 PTEs in topsoil were higher than the Hainan soil geochemical baseline,showing different degrees of PTEs accumulation *** co.centration of PTEs in the topsoil was lower than those in the subsoil except for Cd and *** I_(geo)revealed that the major accumulated element in soils was As followed by *** apportionment suggested that parent materials and agricultural practices were the dominant factors for PTEs accumulation in the *** risks of soil samples from five land-use patterns presented a trend of paddy field>dry field>woodland>orchard>garden ***,the HQ values of 12 PTEs were less than the reco.mended limit of HQ=1,representing that there are no non-carcinogenic risks of PTEs for children and adults in the study *** TR values are within 6.95×10^(-6)-1.38×10^(-5),which co.responds to the low *** the PTEs in the agricultural soil of the study area show little influence on the health status of the local population.

关键词： Potentially toxic trace elements(PTEs) Soils Land-use Geo-accumulation index(Igeo) Hazard quotient(HQ) Total carcinogenic risk index(TR) Source apportionment Health risk Agricutural geological survey engineering

黄土生态护坡优化措施研究及水土流失治理效果预测

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Journal of Geographical Sciences 2024年第6期34卷 1083-1108页

作者：张晓超李明俐姚忠劭覃亮蒙明辉 State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of TechnologyChengdu 610059China Sichuan geological Environment Survey and Research Center Chengdu 610084China Sichuan Huadi Building Engineering co. Ltd.Chengdu 610084China Sichuan Province Engineering Technology Research Center of Geohazard Prevention Chengdu 610084China

The large-scale management of ditches and implementation of land projects in loess areas have increased the arable land area but have caused co.siderable engineering issues, resulting in severe soil erosion. In this study, field tests were performed at different time scales, a co.trol group was established, organic material–plant joint restoration technology was proposed as an optimized management measure, and the erosion co.trol mechanism and restoration mode of organic material–plant joint restoration technology were analyzed. Based on the obtained experimental data, a Water Erosion Prediction Project(WEPP)-based hydraulic erosion model was co.structed, sensitivity parameters were calibrated, and the soil erosion intensity and co.responding spatial distribution in the watershed of the study area were simulated via the geo-spatial interface for WEPP(GeoWEPP) after organic material–plant joint restoration technology was adopted to predict the effect of optimized management measures. The results showed that among the slopes with different restoration measures, organic material–plant joint restoration technology effectively co.trolled loess slope erosion, and the average erosion modulus of the organic material–grass and shrub transplantation slope reached only 23.37 t/km^(2), which is a decrease of 97.68% relative to the traditional grass–shrub protection slope. Moreover, the sand co.tent of the joint restoration slope was reduced by 392.41 g/L relative to the bare slope, reaching only 0.29 g/L, and the runoff yield was reduced by 8.88 L/min. The GeoWEPP modeling results revealed that the total runoff yield and average annual erosion modulus of the watershed were lower after joint restoration than during the prerestoration period. Similarly, the total runoff yield of the watershed was 4.6%, the simulated 10-year average annual total sand production reached 2048.3 t,and the average annual erosion modulus was 582.75 t/km^(2), which is 52.15% lower than that under untrea

关键词： loess excavation slope slope surface erosion prevention and co.trol measures GeoWEPP model erosion prediction

Structural features in the mid-southern section of the Kyushu–Palau Ridge based on satellite altimetry gravity anomaly

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Acta Oceanologica Sinica 2024年第4期43卷 50-60页

作者： Feifei Zhang Dingding Wang Xiaolin Ji Fanghui Hou Yuan Yang Wanyin Wang School of geological Engineering and Geomatics Chang’an UniversityXi’an 710054China Qingdao Institute of Marine Geology China Geological SurveyQingdao 266071China Information and Navigation co.lege Air Force Engineering UniversityXi’an 710077China National Engineering Research Center of Offshore Oil and Gas Exploration Beijing 100028China Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of SciencesQingdao 266071China

The Kyushu–Palau Ridge(KPR),an anti-S-shaped submarine highland at the center of the Philippine Sea Plate(PSP),is co.sidered the residual arc of the Izu–Bonin–Mariana Island Arc,which retains key information about the cessation of the Western Philippine Basin(WPB)expansion and the Parece Vela Basin(PVB)***,using the new generation of satellite altimetry gravity data,high-precision seafloor topography data,and newly acquired ship-borne gravity data,the topographic and gravity characteristics of the KPR mid-southern section and adjacent region are *** distribution characteristics of the faults were delineated using the normalized vertical derivative–total horizontal derivative method(NVDR-THDR)and the minimum curvature potential field separation *** Moho depth and crustal thickness were inverted using the rapid inversion method for a double-interface model with depth *** on these results,the crust structure features in the KPR mid-southern section,and the“triangular”structure geological significance where the KPR and Central Basin Rift(CBR)of the WPB intersect are *** KPR crustal thickness is approximately 6–16 km,with a distinct disco.tinuity that is slightly thicker than the normal oceanic *** KPR mid-southern section crust structure was divided into four segments(S1–S4)from north to south,formed by the CBR eastward extension joint action and clockwise rotation of the PVB expansion axis and the Mindanao fault zone blocking effect.

关键词： structural features satellite altimetry gravity data Kyushu-Palau Ridge Central Basin Rift faults Moho depth

Provenance of the Lower Jurassic pyroclastic sediments in the Zigui Basin:Implication for crustal thickening in the eastern Qinling orogenic belt

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Science China Earth Sciences 2024年第1期67卷 196-207页

作者： Rong CHAI Jianghai YANG Yuansheng DU Chengshan WANG School of Earth Sciences and Resources China University of Geosciences(Beijing)Beijing 100023China School of Earth Sciences China University of Geosciences(Wuhan)Wuhan 430074China Chinese Academy of geological Sciences Beijing 100037China

The Late Triassic witnessed significant co.lisional orogenic events in the Qinling orogenic belt,acco.panied by magma underplating and tectonic *** processes potentially resulted in substantial crustal thickening and uplift of the Qinling ***,due to the absence of igneous rock reco.ds from this period in the eastern section of the Qinling orogen,the changes in crustal thickness during this orogenic process have not been thoroughly investigated.A series of foreland basins emerged during the Early Mesozoic to the south of the East Qinling orogenic *** basins have preserved clastic sedimentary rocks derived from the uplift and erosion of the orogenic *** sedimentary reco.ds serve as crucial reco.ds to reco.struct the evolutionary history of the Qinling *** further clarify the co.lisional orogenic process of the Qinling orogenic belt,this study co.ducted in situ volcanic lithic fragment geochemistry,detrital zirco. U-Pb chronology and trace element co.position analysis on the sandstones of the Lower Jurassic Tongzhuyuan Formation in the Zigui *** results suggest that the sandstones,which exhibit a significant abundance of volcanic lithic fragments,has a characteristic detrital zirco. age group of 250–200 Ma,indicating a major provenance from the Triassic volcanic *** with regional co.relation and paleocurrent analysis,the detrital zirco. U-Pb age data show that the source area of volcanic rocks should be in the Qinling orogenic belt to the north of the *** interpretation is further supported by the Triassic granitic rocks exposed in the western part of the orogenic belt,representing the magmatism during the Triassic co.lisional orogenesis in the Qinling *** on the co.varying relationships between present-day crust thickness with the chemical co.positions of granite rocks and zirco.s,the La/Yb ratio of volcanic lithic fragments in the Tongzhuyuan Formation and the Eu/Eu*ratio of detrital zirco.

关键词： Qinling orogenic belt Zigui Basin Late Triassic Detrital zirco.s Crustal thickening

Geochronology,petrogenesis,and geological significance of the quartz vein-type co.per deposits in Longwei area,north-west Dayaoshan,Guangxi

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Frontiers of Earth Science 2024年第1期18卷 68-82页

作者： Song FU Shehong LI Changxing LV Longqing SHI Xuhan HU Jinming WU Zhuolin XIE co.lege of Earth Sciences&Engineering Shandong University of Science and TechnologyQingdao 266590China School of Earth Sciences Guilin University of TechnologyGuilin 541006China Xinwen Mining Group co. Ltd.Huafeng Coal MineTai’an 271409China

Quartz-vein-type co.per deposits were disco.ered in SN-trend ore-bearing structures in north-west Dayaoshan,*** of reports on the precise metallogenic age of these deposit has beco.e a bottleneck in metallogenic research in this *** this study,the quartz vein-type co.per mine in Longwei area of Jinxiu was selected as the research *** illite samples in the fault gouges and ore samples were co.lected for testing and *** on the Re-Os isotope dating study,the age of pyrite isochron,belonging to the Caledonian period,was determined to be 417±25 Ma,whereas that of chalco.yrite isochron belonging to the Indosinian period,was found to be 243±18 *** crystallized co.siderably earlier than *** obtained EPMA data were co.bined with rock mineralogical analysis data,Metasomatous mineral pyrite and metasomatic mineral chalco.yrite were identified to have originated from different hydrothermal *** the Indosinian period,co.per deposits in the Longwei area underwent pyrite crystallization,pyrite fragmentation,co.per-bearing hydrothermal filling,and metasomatism,co.solidating and forming *** study determined the mineralisation time and ore sources of co.per deposits in the Longwei *** study provides evidence for the existence of Indosinian hydrothermal activities in the north-western Dayaoshan area.

关键词： Re-Os dating electron probe micro-analyser quartz-vein co.per deposit Dayaoshan area