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Early Permian–Late Triassic Magmatism in the Tuotuohe Region of the Qinghai–Tibet Plateau: Constraints on the Tectonic evolution of the Western Segment of the Jinshajiang Suture

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Acta Geologica Sinica(English Edition) 2014年第2期88卷 498-516页

作者： QIAN Ye SUN Fengyue LI Bile LI Shijin ZHAO Junwei College of Earth Sciences Jilin University Qinghai geological Survey No.5 geological and Mineral Survey institute of Qinghai province

In this paper we present new zircon U-Pb ages,whole-rock major and trace element analyses,and zircon Hf isotopic data for magmatic rocks in the Tuotuohe region of the western segment of the Jinshajiang *** aim is to constrain the Early Permian-Late Triassic tectonic evolution of the *** from the magmatic rocks of the Tuotuohe region are euhedralsubhedral in shape and display fine-scale oscillatory zoning as well as high Th/U ratios （0.4-4.6）,indicating a magmatic *** zircon U-Pb ages obtained using LA-ICP-MS are 281 ± 1 Ma,258 ± 1 Ma,244 ± 1 Ma,and 216 ± 1 Ma,which indicate magmatism in the Early Permian-Late Triassic.A diorite from Bashihubei （BSHN） has SiO2 =57.18-59.97 wt％,Al2O3=15.70-16.53 wt％,and total alkalis （Na2O ＋ K2O） =4.46-6.34 wt％,typical of calc-alkaline and metaluminous series.A gabbro from Bashibadaoban （BSBDB） belongs to the alkaline series,and is poor in SiO2 （45.46-54.03 wt％） but rich in Al2O3 （16.19-17.39 wt％） and total alkalis （Na2O ＋ K2O =5.48-6.26 wt％）.The BSHN diorite and the BSBDB gabbro both display an enrichment of LREEs and LILEs and depletion of HFSEs,and they have no obvious Eu anomaly; they have relatively low MgO contents （2.54-4.93 wt％）,Mg# values of 43 to 52,and low Cr and Ni contents （8.07-33.6 ppm and 4.41-14.2 ppm,respectively）,indicating they differentiated from primitive mantle *** have low Nb/U,Ta/ U,and Ce/Pb ratios （1.3-9.6,0.2-0.8,and 0.1-18.1,respectively）,and their initial Hf isotopic ratios range from ＋9.6 to ＋16.9 （BSHN diorite） and ＋6.5 to ＋12.6 （BSBDB gabbro）,suggesting their primary magmas were derived mainly from the partial melting of a mantle wedge that had been metasomatized by subduction *** all the new data together,we conclude that the western and eastern segment of the Jinshajiang suture regions underwent identical processes of evolution in the Early Permian-Late Triassic：oceanic crust subduction before the Early Permian,continental collision during the Early-Middle T

关键词： zircon U-Pb chronology zircon Hf isotopes geochemistry tectonic setting Tuotuohe region Jinshajiang suture Qinghai-Tibet Plateau

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Geochemical Characteristics and Metallogenesis of the Qingkuangshan Ni-Cu-PGE Mineralized Mafic-Ultramafic Intrusion in Huili County, Sichuan province, SW China

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Acta Geologica Sinica(English Edition) 2012年第3期86卷 590-607页

作者： ZHU Feilin TAO Yan HU Ruizhong MA Yansheng State Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550002China Graduate University of the Chinese Academy of Sciences Beijing 100049China East China geological exploration Bureau of Nonferrous Metals Jiangsu ProvinceNanjing 210007China

The Qingkuangshan Ni-Cu-PGE deposit, located in the Xiaoguanhe region of Huili County, Sichuan province, is one of several Ni-Cu-PGE deposits in the Emeishan Large Igneous province （ELIP）. The ore-bearing intrusion is a mafic-ultramafic body. This paper reports major elements, trace elements and platinum-group elements in different types of rocks and sulfide-mineralized samples in the intrusion. These data are used to evaluate the source mantle characteristics, the degree of mantle partial melting, the composition of parental magma and the ore-forming processes. The results show that Qingkuangshan intrusion is part of the ELIP. The rocks have trace element ratios similar to the coeval Emeishan basalts. The primitive mantle-normalized patterns of Ni-Cu-PGE have positive slopes, and the ratios of Pd/Ir are lower than 22. The PGE compositions of sulfide ores and associated rocks are characterized by Ru depletion. The PGE contents in bulk sulfides are slightly depleted relative to Ni and Cu, which is similar to the Yangliuping Ni-Cu-PGE deposit. The composition of the parental magma for the intrusion is estimated to contain about 14.65 wt% MgO, 48.66 wt% SiO2 and 15.48 wt% FeOt, and the degree of mantle partial melting is estimated to be about 20%. In comparison with other typical Ni-Cu-PGE deposits in the ELIP, the Qingkuangshan Ni-Cu-PGE deposit has lower PGE contents than the Jinbaoshan PGE deposit, but has higher PGE contents than the Limahe and Baimazhai Ni-Cu deposit, and has similar PGE contents to the Yangliuping Ni-Cu-PGE deposit. The moderate PGE depletions in the bulk sulfide of the Qingkuanghan deposit suggest that the parental magma of the host intrusion may have undergone minor sulfide segregation at depth. The mixing calculations suggests that an average of 10% crustal contamination in the magma, which may have been the main cause of sulfide saturation in the magma. We propose that sulfide segregation from a moderately PGE depleted magma took place prior

关键词： Magmatic sulfide deposit mafic-ultramafic intrusion PGE Qingkuangshan Emeishan Large Igneous province

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Genetic Types, Spatiotemporal Distribution of Ore Deposits and Sources of Ore-forming Materials in the Xuancheng Area, Anhui province

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Acta Geologica Sinica(English Edition) 2020年第6期94卷 1874-1892页

作者： LU Sanming ZHANG Zanzan ZHAO Lili LI Jianshe ZHAO Zhuang QI Huasheng Public geological Survey Management Center of Anhui province Hefei 230091China CAS Key Laboratory of Crust-Mantle Materials and Environments University of Science and Technology of ChinaHefei 230026China geological Survey of Anhui province(Anhui institute of geological Sciences) Hefei 230001China

In recent years,several large and medium-sized ore deposits have been discovered in the shallow cover of Xuancheng,Anhui province,indicating that this area has a productive metallogenic geological background and may be a potential prospecting *** on systematic investigation,the geological and mineralization characteristics of porphyry Cu-Au deposits and skarn Cu-Mo-W deposits in this region have been *** U-Pb dating(LA-ICPMS)of the Chating quartz-diorite porphyry and the Kunshan biotite pyroxene diorite yield concordia ages of 145.5±2.1 Ma and 131.8±2.1 Ma,***,the Re-Os dating analyses for molybdenite from the Shizishan and Magushan skarn Cu-Mo deposits yielded 133.81±0.86 Ma and 143.8±1.4 Ma ages,*** viewed in conjunction with previous studies,it is suggested that twostage(the early stage of 145-135 Ma and the late stage of 134-125 Ma)magmatism may have occurred during the Mesozoic in Xuancheng *** stage intrusive rocks are distributed along both sides of the Jiangnan deep fault(JDF).The intrusive rocks to the north of the JDF are mainly quartzdiorite porphyry and granodiorite(porphyry)rocks,related to porphyry Cu-Au deposits and skarn-type Cu-Mo-W *** deposits belong to the first stage of the porphyry-skarn copper gold metallogenic belt of the Middle-Lower Yangtze Metallogenic Belt(MLYB),associated with the high potassium calc-alkaline intermediate-acid *** magmatic and ore-forming materials are mainly derived from the enriched lithospheric *** of the JDF,the Magushan granodiorite is a representative intrusive rock of the first stage I-type granite,which hosts the Magushan Cu-Mo skarn deposit,similar to the W-Mo-Cu skarn deposits in the Eastern Segment of the Jiangnan Uplift Metallogenic Belt(ESJUB).The magmatic and metallogenic materials mainly came from the Neoproterozoic basement,with the possible participation of a small amount of mantle *** late stage ma

关键词： spatial and temporal distribution two stages of metallogenic events metallogenic materials Xuancheng area

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New Discovery of the Jinshui Tin Deposit in the Middle Section of the East Kunlun Orogenic Belt,Northwestern China:Mineralization Age and exploration Significance

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Journal of Earth Science 2024年第4期35卷 1373-1377页

作者： Xingkai Zhang Shao-Yong Jiang Hui-Min Su Wei Wang Qinglin Xia Yunpeng Liu Shien Li State Key Laboratory of geological Processes and Mineral Resources Collaborative Innovation Center for Exploration of Strategic Mineral ResourcesSchool of Earth ResourcesChina University of GeosciencesWuhan 430074China Third geological exploration institute of Qinghai Nonferrous geological and Mineral exploration Bureau Xining 810000China

Tin,as one of the most important critical metals,has at-tracted great attention worldwide(Jiang et al.,2023,2020).China has the largest amount of tin resources in the world,ac-counting for nearly one-fourth of the world’s total(Jiang et al.,2020;Chen and Sheng,2015).Tin deposits in China mainly occur in the Nanling Range in southern China,the Sanjiang Basin in southwestern China,and the Great Xing’an Range in northeastern China,which account for 98%of the country’s tin resources,whereas tin deposits are relatively rare in north-western China(Ni et al.,2023;Chen et al.,2014,1992).

关键词： Middle northeastern southwestern

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Effects of aggregate size distribution and carbon nanotubes on the mechanical properties of cemented gangue backfill samples under true triaxial compression

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 311-324页

作者： Qian Yin Fan Wen Zhigang Tao Hai Pu Tianci Deng Yaoyao Meng Qingbin Meng Hongwen Jing Bo Meng Jiangyu Wu State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering China University of Mining and TechnologyXuzhou 221116China State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines Anhui University of Science and TechnologyHuainan 232001China State Key Laboratory for Geomechanics&Deep Underground Engineering China University of Mining and Technology(Beijing)Beijing 100083China Key Laboratory of Xinjiang Coal Resources Green Mining Ministry of EducationXinjiang Institute of EngineeringUrumqi 830023China

The mechanical behavior of cemented gangue backfill materials(CGBMs)is closely related to particle size distribution(PSD)of aggregates and properties of cementitious ***,the true triaxial compression tests,CT scanning,SEM,and EDS tests were conducted on cemented gangue backfill samples(CGBSs)with various carbon nanotube concentrations(P_(CNT))that satisfied fractal theory for the PSD of *** mechanical properties,energy dissipations,and failure mechanisms of the CGBSs under true triaxial compression were systematically *** results indicate that appropriate carbon nanotubes(CNTs)effectively enhance the mechanical properties and energy dissipations of CGBSs through micropore filling and microcrack bridging,and the optimal effect appears at P_(CNT)of 0.08wt%.Taking PSD fractal dimension(D)of 2.500 as an example,compared to that of CGBS without CNT,the peak strength(σ_(p)),axial peak strain(ε_(1,p)),elastic strain energy(Ue),and dissipated energy(U_(d))increased by 12.76%,29.60%,19.05%,and90.39%,***,excessive CNTs can reduce the mechanical properties of CGBSs due to CNT agglomeration,manifesting a decrease inρ_(p),ε_(1,p),and the volumetric strain increment(Δε_(v))when P_(CNT)increases from 0.08wt%to 0.12wt%.Moreover,the addition of CNTs improved the integrity of CGBS after macroscopic failure,and crack extension in CGBSs appeared in two modes:detour and pass through the ***σ_(p)and U_(d)firstly increase and then decrease with increasing D,and porosity shows the opposite ***ε_(1,p)andΔε_(v)are negatively correlated with D,and CGBS with D=2.150 has the maximum deformation parameters(ε_(1,p)=0.05079,Δε_(v)=0.01990)due to the frictional slip effect caused by coarse *** increasing D,the failure modes of CGBSs are sequentially manifested as oblique shear failure,"Y-shaped"shear failure,and conjugate shear failure.

关键词： cemented gangue backfill materials particle size distribution true triaxial compression test carbon nanotubes mechanical properties failure modes

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Application of Visual MODFLOW to simulation of migration in Cr6+ contaminated site

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Journal of Groundwater Science and Engineering 2014年第3期2卷 28-35页

作者： ZHANG Zhi-qiang LI Hong-chao WANG Yu-qing ZHANG li-ye WANG Ying institute of Environmental geological exploration of Hebei province

On the basis of site investigation and data collection of a certain electro plating factory,the groundwater flow and solute transport coupled models were established by applying Visual MODFLOW 4.1 software,which was used to conduct a numerical simulation that forecast the transport process of Cr6+ in groundwater. The results show that contamination plume of Cr6+ transports with groundwater flow direction. Without control measures,in 3 650 days,19 wells for drinking would be contaminated,and the range of transport would be 52 172 m2,the maximum contamination would be 35.8 mg/L.

关键词： Hexavalent Chromium Visual MODFLOW Transport simulation

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Cloning and characterization of the gene encoding an ubiquitin-activating enzyme E1 domain-containing protein of silkworm, Bombyx moil

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Insect Science 2010年第2期17卷 75-83页

作者： Ping Wu Mu-Wang Li Yun-Feng Jiang Zi-Sheng Wang Xi-Jie Guo Sericultural Research institute Chinese Academy of Agricultural Sciences College of Biotechnology and Environmental Engineering Jiangsu University of Science and Technology Zhenjiang Jiangsu Province China

Bombyx mori cytoplasmic polyhedrosis virus （BmCPV） is one of the major viral pathogens for the silkworm. To date, the molecular mechanism of BmCPV invasion has been unclear. We cloned the full length complementary （c）DNA which encodes the ubiquitin-activating enzyme El-domain containing proteinl （UbE1DC1） ofBombyx mori by using suppression subtraefive hybridization （SSH） and rapid amplification of com- plementary （c）DNA ends （RACE）. The full-length eDNA of UbE1DClgene is 1 919 bp, consisting of a 100 bp 5＇ untranslated region, a 637 bp 3＇ untranslated region and an 1 182 bp open reading frame （ORF）, encoding a 393 amino acid protein. The protein contained the THiF_MoeB_hesA_family domain, an adenosine triphosphate binding site, which belongs to the family of ubiquitin-activating enzyme El. Reverse transcription - polymerase chain reaction analysis from the silkworm tissues, namely silk gland, hemo- cyte, fat body, gonad and midgut revealed that UbE1DC1 was expressed in all the five tissues. The real-time quantitative polymerase chain reaction analysis indicated that the relative expression of UbE1DC1 in the normal midgut was approximately 9.78-fold of that in the BmCPV-infected midgut. It is implicated that UbEIDCI may play an important role in the interaction between the host and BmCPV invasion.

关键词： Bombyx mori Cytoplasmic polyhedrosis virus midgut quantitative real-time PCR rapid amplification of eDNA ends suppression subtractive hybridization

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Flow field design and process stability in electrochemical machining of diamond holes

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Chinese Journal of Aeronautics 2016年第6期29卷 1830-1839页

作者： Zhao Jianshe Wang Feng Liu Zhuang Zhang Xiangli Gan Weimin Tian Zongjun College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and Astronautics Digital ECM Building Laboratory of jiangsu province Changzhou Institute of Technology

The metal grille, commonly composed of an amount of diamond holes, has been growingly used as a key structure on stealth aircraft. Electrochemical machining(ECM) promises to be increasingly applied in aircraft manufacturing on the condition that process stability is *** this work, a flow field model was designed to improve the process stability. This model is endowed with a variety of flow channel features, together with vibrating feeding modes. The flow field distribution on the bottom surface of the diamond hole was discussed and evaluated as *** numerical results show that a short arc flow channel could significantly enhance the uniformity of electrolyte velocity distribution and a vibrating feeding of the cathode enables to reduce both fluctuations of the electrolyte velocity and pressure on the bottom surface of the diamond ***, the flow field mutations were eliminated. It is verified from the experimental results that a short arc flow channel, when combined with vibrating feeding, is capable of improving machining localization and process stability markedly. What is more, the side gap on the bottom surface of the diamond hole could also be reduced by the abovementioned approach.

关键词： Diamond hole Electrochemical machining Flow fields Stability Vibrating

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The Erupting-Flow Model and Erupting-Flow Types in Yangbajain Geothermal Field in China

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Acta Geologica Sinica(English Edition) 1989年第3期63卷 313-323页

作者： Hu Xunsen and Zheng Zhuohua institute of Hydrogeology and Engineering Geology, Chinese Academy of geological Sciences, Zhengding, Hebei province institute of Hydrogeology and Engineering Geology Chinese Academy of Geological Sciences Zhengding Hebei Province

Erupting-flow types of geothermal wells in the Yangbajain geothermal field, China, are proposed based on internal energy of geothermal fluids and hydrogeologic-dynamic conditions of wellbore. An erupting-flow model, w... 详细信息

关键词： well The Erupting-Flow Model and Erupting-Flow Types in Yangbajain Geothermal Field in China Flow

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Application of wide-field electromagnetic method in shale gas survey in Eastern Kunlun,Qinghai province,China

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Journal of Central South University 2020年第11期27卷 3388-3397页

作者： YU Zhong-hong YAN Ling-qin CAI Zhi-jie WANG Jin-hai XU Yong-feng LIN Jia-fu MA Long The Third geological exploration institute of Qinghai province Xi’ning 810000China Qinghai geological Survey Xi’ning 810000China The Fourth geological exploration institute of Qinghai province Xi’ning 810000China Key Laboratory of Shale Gas Resources of Qinghai province Xi’ning 810000China

In order to study the distribution of shale gas reservoir in the Babaoshan Basin of Eastern Kunlun,the wide-field electromagnetic(WFEM)survey was carried out to obtain the spatial distribution characteristics of the underground electrical volume resistivity based on the delineation of the scope of the Babaoshan Basin by regional gravity *** basic characteristics of the basement,basin framework,and extension,vertical change,burial depth of dark mud shale in this area were identified,and the electrical distribution of the Babaoshan mud shale horizon was revealed,which has been proved to be a good geological effect by *** exploration results show that the WFEM has significant effects on the exploration of shale gas occurrence strata,which meets the needs of investigation and evaluation of multi-layered and large-scale shale gas,and plays a good demonstration role in the follow-up shale gas exploration.

关键词： wide field electromagnetic method shale gas Eastern Kunlun Babaoshan Basin

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