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Ages, Trace Elements and Hf-Isotopic Compositions of Zircons from Claystones around the Permian-Triassic Boundary in the Zunyi Section, South China: Implications for Nature and Tectonic Setting of the Volcanism

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Journal of Earth Science 2015年第6期26卷 872-882页

作者： Qiuling Gao Zhong-Qiang Chen Ning Zhang William L.Griffin Wenchen Xia Guoqing Wang Tengfei Jiang Xuefei Xia Suzanne Y.O'Reilly exploration & Development Research institute Zhongyuan Oilfield Company School of Earth Sciences China University of Geosciences Australian Research Council Centre of Excellence for Core to Crust Fluid Systems and GEMOC National Key Centre Department of Earth and Planetary Science Macquarie University State Key Laboratory of Biogeology and Environmental geology China University of Geosciences shandong lunan institute of geo-engineering exploration Jianghan Oilfield Company

A growing body of evidence shows that volcanism near the Permian-Triassic boundary（PTB） may be crucial in triggering the Permian–Triassic（P–Tr） mass extinction. Thus, the ash beds near the PTB in South China may carry information on this event. Three volcanic ash layers, altered to clay, outcropped in the PTB beds in Zunyi Section, Guizhou Province, Southwest China. The U-Pb ages, trace elements, and Hf-isotope compositions of zircon grains from these three ash beds were analyzed using LA-ICPMS and LA-MC-ICPMS. The zircons are mainly magmatic in origin（241-279 Ma） except for two inherited/xenocrystic zircons（939 and 2 325 Ma）. The ages of these magmatic zircons indicate three episodes of magmatism which occurred around the MiddleLate Permian boundary（-261.5 Ma, MLPB）, the Wuchiapingian-Changhsingian boundary（-254.5 Ma, WCB）, and the PTB（-250.5 Ma）, respectively. The first two episodes of magmatism near the MLPB and WCB may be attributed to magmatic inheritance or re-deposition. All magmatic zircons share similar trace-element and Hf-isotope compositions. They have Y, Hf, Th and U contents and Nb/Ta ratios are typical of zircons from silicic calc-alkaline magmas. These zircons also exhibit enriched Hf-isotope compositions with _（εHf）（t） values of-11.4 to ＋0.2, which suggests that the three magmatic episodes involved melting of the continental crust. The more enriched Hf-isotope composition （_（εHf）（t）=-11.4--4.8） of Bed ZY13（-250.5 Ma） implies more input of ancient crustal material in the magma. Integration of the Hf-isotope and trace-element compositions of magmatic zircons suggest that these three episodes of magmatism may take place along the convergent continent margin in or near southwestern South China as a result of the closure of the Palaeo-Tethys Ocean.

关键词： Permian-Triassic boundary zircon trace elements Hf isotope silicic volcanism,convergent continental margin South China.

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Dynamic Change Analysis of Urban Green Land in Jinan City Based RS and geo-information Tupu

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Asian Agricultural Research 2011年第1期3卷 90-92页

作者： XU Qiu-xiao shandong provincial geo-mineral engineering exploration institute Jinan 250014China

The three-period (1995, 1998 and 2003) remote sensing images in Jinan City, China are selected. And the information of green land, construction land, woodland and water body is extracted by using the image processing module of remote-sensing software and computerized interpretation module. Both the change table and transfer matrix table of land use area are analyzed by modeling module of remote-sensing software. Then, the geo-information Tupu is obtained; and the temporal and spatial variation of land use in Jinan City is monitored and analyzed by geo-information Tupu and transfer matrix. Result shows that land use structure change of Jinan City in the years 1995-1998 shows a transformation from green land to construction land. Area of green land circulating into construction land reaches 62.27 square kilometers, accounting for 25.84% of the initial green land. In the year 1998, areas of woodland and green land are reduced due to the urban expansion of Jinan City. However, with the enhancement of people's awareness of environmental protection, areas of woodland and green land gradually increase in the year 2003, which are still less than those in the year 1995.

关键词： Remote sensing geo-information Tupu Dynamic change of the green land Jinan City China

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geochemical,mineralogical,and petrological analyses for the interpretation of the sedimentary environment of the Middle-Late Ordovician Majiagou Formation(northern China)as a tool for more effective gas exploration

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Petroleum Science 2022年第6期19卷 2519-2532页

作者： Jie Gao Da-Wei Lv A.J.(Tom) van Loon Dun Wu shandong provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals Shandong University of Science and TechnologyQingdaoShandong266590China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyShandong266071China College of Earth Science and engineering Shandong University of Science and TechnologyShandong266590China exploration Research institute Anhui Provincial Bureau of Coal GeologyHefeiAnhui230088China

Core samples from the deeply buried Ordovician Majiagou Formation below the Huainan Coalfield(E China) have been investigated for their carbonate types,major and trace elements(including rare earth elements) and C and O isotopes,The objective was to get a better insight into the possible occurrences of gas(and possibly oil) derived from Carboniferous *** was found that the carbonates are dolomites with strongly varying amounts of CaO and *** low concentrations of SiO_(2),Al_(2)O_(3),and Fe_(2)O_(3)indicate deposition in a normal marine environment with little terrigenous input,The Na_(2)O/K_(2)O,Fe/Mn and Sr/Ba ratios,as well as the Ga values indicate mainly a marine salinity and a hot and humid *** slight depletion of Ce and Eu,the depletion of heavy rare earth elements(HREE) and the enrichment of light rare earth elements(LREE) indicate deposition in a reducing *** thus appears that the Majiagou Formation below the Huainan Coalfield closely resembles that in the eastern part of the Ordos Basin,where several gas reservoirs are present,so that the Majiagou Formation under the Huainan Coalfield represents a promising target for hydrocarbon exploration.

关键词： Majiagou Formation Middle Ordovician Major-element analysis REE analysis Trace-element analysis Hydrocarbon exploration

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Coupling mechanism of THM fields and SLG phases during the gas extraction process and its application in numerical analysis of gas occurrence regularity and effective extraction radius

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Petroleum Science 2022年第3期19卷 990-1006页

作者： Hui-Huang Fang Chun-Shan Zheng Ning Qi Hong-Jie Xu Hui-Hu Liu Yan-Hui Huang Qiang Wei Xiao-Wei Hou Lei Li Shuai-Liang Song State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines Anhui University of Science and TechnologyHuainanAnhui 232001China institute of Energy Hefei Comprehensive National Science CenterHefeiAnhui 230000China School of Earth and Environment Anhui University of Science and TechnologyHuainanAnhui 232001China Great institute of Standardization China National Institute of Standardization's High Quality and Green Development Innovation R&D BaseJinanShandong 250101China State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing102249China School of Resources and Civil engineering Suzhou UniversitySuzhouJiangsu 234000China School of Resources and Environmental engineering Hefei University of TechnologyHefeiAnhui 230009China The Third exploration Team of shandong Coalfield geologic Bureau TaianShandong 250102China shandong provincial lunan geo-engineering exploration Instituts JiningShandong 272100China

The analysis of the coupling mechanism of thermal-hydraulic-mechanical(THM)fields,and solid-liquidgas(SLG)phases during gas extraction process is of profound significance to explore its numerical application in the gas occurrence regularity and its effective extraction *** this study,the Hudi coal mine in Qinshui basin is taken as the research area,the influencing factors of gas occurrence were analyzed,the differences in overburden load for gas pressure distribution and the factors influencing the effective extraction radius were further discussed by using the COMSOL *** results show that the derivation of mathematical model in gas extraction shows that the process is a process the THM fields restrict each other,and the SLG phases influence each *** longer the extraction time,the larger the influencing range of borehole,and the better the extraction *** larger the diameter of borehole,the larger the effective extraction radius,and the influence on gas extraction effect is smaller in the early stage and larger in the late *** borehole arrangement should be flexibly arranged according to the actual extraction *** higher the porosity,the higher the permeability,the better the gas extraction *** larger the overburden load of reservoir,the stronger the effective stress,which will result in the more severe the strain,and the closure of pore and fracture,which in turn will lead to the decrease of permeability and slow down the gas *** relationship among extraction time,borehole diameter,negative pressure of gas extraction,permeability with effective extraction radius is *** study has important theoretical and practical significance for clarifying and summarizing the gas occurrence regularity and its engineering practice.

关键词： Gas occurrence regularity Effective extraction radius THM fields and SLG phases Numerical simulation COMSOL Multiphysics Hudi coal mine

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Metallogenic Epoch of Nonferrous Metallic and Silver Deposits in the Jiaodong Peninsula, China and its geological Significance

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Acta geologica Sinica(English Edition) 2017年第4期91卷 1305-1325页

作者： SONG Mingchun WANG Shanshan YANG Lixin LI Jie LI Shiyong DING Zhengjiang shandong provincial Bureau of geology & Mineral Resources Jinan 250013 Shandong China shandong provincial engineering Research Center for geological Prospecting Jinan 250013 Shandong China The Sixth geology & Mineral Resources Survey institute of shandong Province Weihai 264209 Shandong China Department of Resource Hebei University of Geosciences Shijiazhuang 050000 Hebei China geophysical & geochemical exploration institute of shandong Province Jinan 250013 Shandong China The-Third geology & Mineral Resources Survey institute of shandong Province Yantai 264003 Shandong China

As China＇s most important gold-producing district, the Jiaodong Peninsula also contains copper, lead-zinc, molybdenum （tungsten）, and other nonferrous metal ore deposits, but the space-time and genetic relationships with gold deposits remain uncertain. To investigate the temporal relationship between these nonferrous metal and gold ore deposits, We collected the samples from a number of nonferrous metallic and silver deposits and metallogenetic rock bodies in the eastern Jiaodong Peninsula for isotopic dating. The results show that the Re-Os isotopic model ages of the Lengjia molybdenum deposit in Rongcheng range from 114.5 ± 1.8 Ma to 112.6 ± 1.5 Ma, with an average age of 113.6 ± 1.6 Ma; the LA-ICP-MS ^206pb/^238U ages of 33 zircons in the sericitization porphyritic monzogranite that hosts the Tongjiazhuang silver deposit in Rongcheng range between 122 Ma and 109 Ma, with a weighted mean age of 116.04 ± 0.95 Ma; the LA-ICP-MS ^206pb/^238U ages of 31 zircons in the copper metallogenic pyroxene monzodiorite that hosts the Kuangbei copper deposit in Rongcheng range from 126 Ma to 106 Ma, with a weighted mean age of 116.6 ± 1.7 Ma; and the LA-ICP-MS ^206pb/^238U ages of 19 zircons in the pyroxene monzodiorite surrounding the Dadengge gold and multimetal deposit in Weihai range from 113 Ma to 110 Ma, with a weighted mean age of 111.7 ± 0.6 Ma. All these results indicate that the metallogenic ages of the silver and nonferrous metallic deposits in the Jiaodong Peninsula are in a limited range from 118 Ma to 111 Ma. Previous studies have demonstrated that the isotopic ages of gold deposits in the Jiaodong Peninsula range from 123 Ma to 110 Ma, while Weideshanian magmatism occurred between 126 Ma to 108 Ma. Both these ranges are grossly consistent with the metallogenic ages of silver and nonferrous metallic deposits in this study, suggesting that the large-scale mineralization occurred in the Early Cretaceous when magmatic activities were strong. This epoch may be linked t

关键词： metallogenic epoch nonferrous metal mineral silver deposit thermal uplifting- extensional structure mineralization scenario Jiaodong type gold deposit

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geology and mineralization of the Sanshandao supergiant gold deposit(1200 t)in the Jiaodong Peninsula,China:A review

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China geology 2021年第4期4卷 686-719页

作者： Ming-chun Song Zheng-jiang Ding Jun-jin Zhang Ying-xin Song Jun-wei Bo Yu-qun Wang Hong-bo Liu Shi-yong Li Jie Li Rui-xiang Li in Wang Xiang-dong Liu Liang-liang Zhang Lei-lei Dong Jian Li Chun-yan He shandong provincial No.6 exploration institute of geology and Mineral Resources Weihai 264209China shandong provincial Bureau of geology and Mineral Resources Jinan 250013China shandong provincial No.3 exploration institute of geology and Mineral Resources Yantai 264003China shandong institute of geological Sciences Jinan 250013China shandong provincial Ruihai Mining Limited Company Laizhou 261400China shandong institute of geophysical&geochemical exploration Jinan 250013China Hebei Key Laboratory of Strategic Critical Mineral Resources Hebei GEO UniversityShijiazhuang 050031China School of Civil and Resource engineering University of Science and Technology BeijingBeijing 100083China School of Resources and Environmental engineering Shandong University of TechnologyZibo 255000China

The Jiaodong Peninsula in shandong Province,China is the world’s third-largest gold metallogenic area,with cumulative proven gold resources exceeding 5000 *** the past few years,breakthroughs have been made in deep prospecting at a depth of 500‒2000 m,particularly in the Sanshandao area where a huge deep gold orebody was *** on previous studies and the latest prospecting progress achieved by the project team of this study,the following results are summarized.(1)3D geological modeling results based on deep drilling core data reveal that the Sanshandao gold orefield,which was previously considered to consist of several independent deposits,is a supergiant deposit with gold resources of more than 1200 t(including 470 t under the sea area).The length of the major orebody is nearly 8 km,with a greatest depth of 2312 m below sea level and a maximum length of more than 3 km along their dip direction.(2)Thick gold orebodies in the Sanshandao gold deposit mainly occur in the specific sections of the ore-controlling fault where the fault plane changes from steeply to gently inclined,forming a stepped metallogenic model from shallow to deep *** reason for this strong structural control on mineralization forms is that when ore-forming fluids migrated along faults,the pressure of fluids greatly fluctuated in fault sections where the fault dip angle *** the solubility of gold in the ore-forming fluid is sensitive to fluid pressure,these sections along the fault plane serve as the target areas for deep prospecting.(3)Thermal uplifting-extensional structures provide thermodynamic conditions,migration pathways,and deposition spaces for gold ***,the changes in mantle properties induced the transformation of the geochemical properties of the lower crust and magmatic *** further led to the reactivation of ore-forming elements,which provided rich materials for gold mineralization.(4)It can be concluded from previous research re

关键词： Gold deposit Deep prospecting Thermal uplifting-extension mineralization Transformation of mantle properties Stepped metallogenic model Mineral exploration engineering Jiaodong-type gold deposits Sanshandao Jiaodong Peninsula China

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Hydrocarbon generation and organic matter enrichment of limestone in a lacustrine mixed sedimentary environment: A case study of the Jurassic Da'anzhai member in the central Sichuan Basin, SW China

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Petroleum Science 2023年第2期20卷 670-688页

作者： Qi-Lu Xu Bo Liu Xin-Min Song Qing-Ping Wang Xu-Dong Chen Yang Li Yu Zhang shandong provincial Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)QingdaoShandong266580China institute of Oil and Gas Peking UniversityBeijing100871China PetroChina Research institute of Petroleum exploration and Development Beijing100083China Petroleum exploration and Production Research institute SINOPECBeijing100083China

The hydrocarbon generation effectiveness of lacustrine limestone has been gradually proven. The Da'anzhai Member limestone is the most important Jurassic oil-producing layer in the central Sichuan Basin, and the characteristics of limestone organic matter are often overlooked. 175 typical samples of different lithologies from 19 wells were systematically analyzed to determine hydrocarbon generation, controlling factors and formation models by analyses of organic matter, minerals, elements, isotopes and petrography. (1) Lacustrine paleoenvironments can be beneficial for the enrichment of organic matter in limestone. A favorable environment would be a quiet, low-energy zone in a warm and humid climate with an appropriate supply of terrestrial inputs. (2) Lacustrine limestone has a higher organic matter conversion rate, and a lower hydrocarbon generation threshold than argillaceous source rocks, and can be effective source rock. (3) The mud-bearing shell limestone from the forebeach to the lake slope is thick, with a relatively high abundance of organic matter, and its hydrocarbon generation is effective. This study can clarify the effectiveness and enrichment of the limestone organic matters in the study area, and contribute to an understanding of hydrocarbon generation for full-rock system in a lacustrine mixed sedimentary environment.

关键词： Lacustrine limestone Full-rock system Organic matter evaluation Paleoenvironments Lake evolution Terrestrial inputs

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A step metallogenetic model for gold deposits in the northwestern shandong Peninsula, China

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Science China Earth Sciences 2012年第6期55卷 940-948页

作者： SONG MingChun YI PiHou XU JunXiang CUI ShuXue SHEN Kun JIANG HongLi YUAN WenHua WANG HuaJiang shandong provincial Bureau of geology and Mineral Resources Jinan 250013 China No. 6 exploration institute of geology and Mineral Resources Zhaoyuan 265400 China shandong institute ＆ Laboratory of geological Sciences Jinan 250013 China

Based on our study of the nature and variation of mineralization-controlling faults in their deep extension and the spatial distribution of gold orebodies in the northwestern shandong Peninsula (NSP), here we propose that the gold deposits in the Jiaojia gold belt are controlled by listric faults and the gold deposits in the NSP are controlled by extensional fault system. We also suggest that there is a multiple mineralization space in the deep part of the NSP gold belt. As steps or benches occur along the deep extention of the listric fault where its dipping angle changes from steep to gentle, a number of gold deposits are correspondingly distributed as a steplike pattern, which is named as a step metallogenetic model for gold deposits in the NSP. The gold deposits in shandong Peninsula were formed in the Cretaceous when the crust in the region experienced extention and thinning following the strong collision between North China Plate and Yangtze Plate during the Triassic. Crust anataxis, fluid remobilization, and extention-detachement of the crust are the leading factors for the gold mineralization.

关键词： deep-seated gold deposit step metallogenetic model northwestern shandong Peninsula Jiaojia gold belt

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Accumulation of unconventional petroleum resources and their coexistence characteristics in Chang7 shale formations of Ordos Basin in central China

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Frontiers of Earth Science 2019年第3期13卷 575-587页

作者： Jingwei CUI Rukai ZHU Zhiguo MAO Shixiang LI Research institute of Petroleum exploration and Development PetroChinaBeijing 100083China shandong provincial Key Laboratory of Depositional Mineralization & Sedimentary Mineral Shandong University of Science and TechnologyQingdao 266590China Changqing Oilfield Research institute of Petroleum exploration and Development CNPCXi’an 710018China

The Ordos Basin is the largest oil and gas producing basin in China, where tight oil, shale gas, oil shale, and other unconventional oil and gas resources have been found in the Chang7 subsection of the Triassic Yanchang Formation. However, the mechanism of formation and the distribution of unconventional oil and gas resources in the shale layers have not been systematically investigated until now. According to the type of unconventional oil and gas resources, main controlling factors, and the maturity, depth and abundance of organic matters, the shale oil and gas resources from Chang7 region are divided into five zones that include an outcrop-shallow oil shale zone, a middle-matured and medium-burial shale oil zone, a medium-matured and medium-burial in situ conversion process (ICP) shale oil zone, a high-maturity and deep-burial shale gas zone, and an adjacent-interbedded tight sandstone oil zone. By the distribution of resources, orderly evolution of oil and gas resources and coexistences in lacustrine shale formations have been put forward, and also a strategy of integrated exploration and development of resources in the shale formations is proposed. Overall, the outcome of this study may guide on the effective utilization of unconventional oil and gas resources in other shale formations.

关键词： shale formation oil and gas resources orderly accumulation and coexistence integrated exploration and development

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Evolution trend of the water quality in Dongping Lake after South-North Water Transfer Project in China

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Journal of Groundwater Science and engineering 2019年第4期7卷 333-339页

作者： HU Zun-fang KANG Feng-xin ZOU An-de YU Lin-song LI Yang TIAN Tong-liang KANG Gui-ling shandong institute of geophysical and geochemical exploration Jinan 250013China shandong Soil geochemical engineering Laboratory Jinan 250013China shandong geological exploration engineering Technology Research Center Jinan 250013China shandong provincial Bureau of geology and Mineral Resources Jinan 250013China

To investigate the evolution trend of water quality in Dongping Lake after South-North Water Transfer Project operation as well as to ensure the safe usage of the water receiving areas, water samples were collected and determined before and after water delivery in different hydrological seasons. Then, comprehensive pollution index method, comprehensive nutrition state index method and health risk assessment model were utilized to evaluate the quality, nutrition, and health risk of Dongping Lake water. Results showed that the quality of Dongping Lake water still met level Ⅲ (light pollution) no matter before or after water delivery. The nutrition state was improved from light eutropher before water delivery to mesotropher after water delivery. The health risk level was reduced from high-medium before water delivery to medium level after water delivery. In summary, the operation of the eastern route of South-North Water Transfer Project is beneficial for water environment improvement of Dongping Lake.

关键词： South-North Water Transfer Project Dongping Lake Water quality Nutrition Health risk

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