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Types of Enclaves and Their Features and Origins in Intermediate-Acid Intrusive Rocks from the Tongling District, Anhui Province, China

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Acta Geologica Sinica(English Edition) 2000年第1期74卷 54-67页

作者： wu cailai WANG Zhihong QIAO Dewu LI Haibing hao meiying shi rendeng institute of geology Chinese Academy of Geological Sciences Xi'an Engineering College geological Mechanics institute CAAGS

Abstract: Enclaves in intermediate-acid plutons from Tongling can be divided into three types: xenoliths, relics and magmatogenic enclaves. The magmatogenic enclaves consist of cumulates, micrograined dioritite mixtite and dioritic chilled border enclaves. Petrologically, relics with eyed and meta-poikilitic texture are characterized by high content of biotite (>80%) and low content of cordierite and grossular. The cumulates with accumulate texture consist of a great amount of pyroxene, hornblende and minor spinel and phlogopite. The micrograined dioritic mixtite is composed of more hornblendes and feldspar and less needle apatites and an ellipsoid basic core included in plagioclase. The chilled border enclaves have the same mineral association, but more dark minerals than the host rocks consisting of plagioclase, quartz, alkaline feldspar, hornblende and biotite. Geochemically, the relics exhibit high REE content (455.8×10?6) and high ratio of LREE/HREE, more obvious Eu negative anomaly and are rich in Cr and Ni, poor in Ba, Nb and Sr. All kinds of magmatogenic enclaves have the same REE pattern without Eu anomaly, and the total REE is 74.9×10?6 for spinel pyroxene cumulate, 179.7×10?6 for hornblende cumulate, 226.9 × 10?6 for hornblende cumulate crystal, 289.9×10?6 for micrograined dioritic mixtite and 131.2×10?6 for chilled border enclaves. Calculation with the thermometer and barometer for minerals shows that the temperature and pressure of formation are 1126 °C and 8.44 kbar (7.15–9.04 kbar) for the spinel pyroxene cumulate, 1065 °C-1029 °C and 8.23 kbar (7.13–9.50 kbar) for the hornblende pyroxene cumulate, 959 °C and 3.40 kbar (2.86–4.09 kbar) for the micrograined dioritic mixtite enclaves, and 951 °C and 0.59 kbar for the dioritic chilled border enclaves, respectively. Thus, the following conclusions can be drawn. Relic enclaves were derived from the crustal partial melting and all cumulate enclaves originated from deep magma chambers near the Moho in the lo

关键词： enclave petrology relics cumulate enclaves mixtite enclaves chilled border enclaves Tongling

Geochronology of Intermediate-Acid Intrusive Rocks from Tongling,Anhui

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Continental Dynamics 2000年第1期 15-23页

作者： wu cailai, WANG Fusheng, hao meiying and shi rendeng institute of geology, CAGS, beijing 100037, China WANG Zhihong Xi’an Engineering College, Xi’an 710054, China QIAO Dewu geological mechanics institute, CAGS, beijing 100081, China

Ar/39Ar isotopic chronologic studies of intrusive rocks from Tongling area, Anhui province have shown that the ages of these rocks are all younger than 140 Ma and belong to Late Yanshanian period, with granodiorite, quartz monzodiorite, pyroxene monzodiorite and gabbro-diabase being 139.8-137 Ma, 137-135.8 Ma, 138.2-136.6 Ma and 133.7 Ma, respectively. Compared with 40Ar/39Ar isotopic chronologic studies of these intrusive rocks, the authors have also dealt with their K-Ar and Rb-Sr isotopic ages, and pointed out that the age error is caused by the late hydrothermal alteration and the mixture of mantle magma and crustal magma. In addition, the mineralization ages are found to be close to the smaller ages of 40Ar/39Ar age spectra, which is in accordance with the regional metallogenic character that mineralization took place later than magmatic activity.

关键词： Ar/ 39Ar isotopic ages Intrusive rocks Tongling

Two stages power generation test of the hot dry rock exploration and production demonstration project in the Gonghe Basin,northeastern Qinghai-Tibet plateau,China

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China geology 2024年第3期7卷 409-421页

作者： Er-yong Zhang Dong-guang Wen Gui-ling Wang Xian-peng Jin Lin-you Zhang Hai-dong wu Wen-shi Wang cheng-ming Ye Wei Weng Kuan Li Jin-sheng wu Xian-chun Tang Chong-yuan Zhang Qing-da Feng Sheng Lian Li-sha Hu Gui-lin Zhu Xing-long Xie Bin wu Dan Wang Xue Niu Zhao-xuan Niu Dong-lin Liu Hui Zhang Wen-hao Xu Shu-qing Yao Li Yang Center for Hydrogeology and Environmental geology Survey China Geological SurveyMinistry of Natural ResourcesTianjin 300304China institute of Hydrogeology and Environmental geology Chinese Academy of Geological SciencesChina Geological SurveyShijiazhuang 050061China institute of Exploration Techniques Chinese Academy of Geological SciencesChina Geological SurveyLangfang 065000China institute of Exploration Engineering China Geological SurveyMinistry of Natural ResourcesBeijing 100083China institute of Exploration Technology Chinese Academy of Geological SciencesChengdu 611734China chinese academy of geological sciences China Geological SurveyBeijing 100037China institute of Geomechanics Chinese Academy of Geological SciencesChina Geological SurveyBeijing 100081China Geoscience Documentation Center China Geological SurveyMinistry of Natural ResourcesBeijing 100083China

The Hot Dry Rock(HDR)is considered as a clean and renewable energy,poised to significantly contribute to the global energy decarbonization *** HDR projects worldwide have accumulated valuable experience in efficient drilling and completion,reservoir construction,and fracture *** 2019,China geological Survey(CGS)initiated a demonstration project of HDR exploration and production in the Gonghe Basin,aiming to overcome the setbacks faced by HDR *** the ensuing four years,the Gonghe HDR project achieved the first power generation in 2021,followed by the second power generation test in *** establishing the primary well group in the initial phase,two directional wells and one branch well were *** progress was made in successfully constructing the targeted reservoir,realizing inter-well connectivity,power generation and grid connection,implementing of the real-time micro-seismic monitoring.A closed-loop technical validation of the HDR exploration and production was ***,many technical challenges remain in the process of HDR industrialization,such as reservoir fracture network characterization,efficient drilling and completion,multiple fracturing treatment,continuous injection and production,as well as mitigation of induced seismicity and numerical simulation technology.

关键词： Power generation Hot dry rock(HDR) Enhanced geothermal system(EGS) Genesis mechanism Gonghe Basin Directional drilling Reservoir construction Circulation test Induced seismicity Clean energy exploration engineering

The 2023 Earthquake in Türkiye and Implications for China's Response to Catastrophe

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International Journal of Disaster Risk Science 2023年第6期14卷 1044-1053页

作者： Peijun shi Lianyou Liu Weihua Fang Jifu Liu Jidong wu Lu Jiang Bo chen Gangfeng Zhang hao Zheng Yintong Zhang State Key Laboratory of Earth Surface Processes and Resource Ecology Beijing Normal UniversityBeijing 100875China Ministry of Emergency Management and Ministry of Education Academy of Disaster Reduction and Emergency ManagementBeijing Normal UniversityBeijing 100875China Key Laboratory of Environmental Change and Natural Disaster of Ministry of Education Beijing Normal UniversityBeijing 100875China Faculty of Geographical sciences Institute of Disaster Risk ScienceBeijing Normal UniversityBeijing 100875China School of National Safety and Emergency Management Beijing Normal UniversityBeijing 100875China

On 6 February 2023,two 7.8 magnitude earthquakes consecutively hit south-central Türkiye,causing great concern from all governments,the United Nations,academia,and all sectors of *** indicate that there is also a high possibility of strong earthquakes with a magnitude of 7.8 or above occurring in the western region of China in the coming *** is a country that is highly susceptible to catastrophic disasters such as earthquakes,floods,and other natural calamities,which can cause significant damages to both human life and property,as well as widespread impacts on the ***,China's capacity for disaster prevention and control is still *** order to effectively reduce the impact of catastrophic disasters,ensure the safety of people's lives and property to the greatest extent possible,maintain social stability in high-risk areas,and ensure high-quality and sustainable regional development,it is urgent to improve the seismic resistance level of houses and critical infrastructure in high earthquake risk zones and increase the earthquake-resistant design level of houses in high-risk fault areas with frequent seismic activities;significantly enhance the ability to defend against extreme weather and ocean disasters in economically developed areas along the southeastern coast,as well as the level of fortification in response to extreme meteorological and hydrological disasters of coastal towns/cities and key infrastructure;vigorously enhance the emergency response capacity and disaster risk prevention level in western and ethnic minority regions;comprehensively improve the defense level of residential areas and major infrastructure in high geological hazard risk zones with flash floods,landslides,and mudslides;systematically promote national disaster prevention and mitigation education;and greatly enhance the societal disaster risk reduction ability,including catastrophic insurance.

关键词： China Disaster impact Disaster response Earthquake in Türkiye

A comprehensive construction of the domain ontology for stratigraphy

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Geoscience Frontiers 2023年第5期14卷 353-361页

作者： Huiqing Xu Yingying Zhao hao Huang Shaochun Dong Yukun shi Chunju Huang Huaichun wu Zhiqi Qian Qiang Fang Huaguo Wen Zhongtang Su Shuang Dai Ronghua Wang Chao Li Chao Sun Junxuan Fan School of Earth sciences and Engineering and Frontiers Science Center for Critical Earth Material Cycling Nanjing UniversityNanjing 210023China institute of geology and Geophysics Chinese Academy of SciencesBeijing 100029China State Key Laboratory of Biogeology and Environmental geology School of Earth SciencesChina University of GeosciencesWuhan 430074China State Key Laboratory of Biogeology and Environmental geology China University of GeosciencesBeijing 100083China School of Ocean sciences China University of GeosciencesBeijing 100083China State Key Laboratory of Oil and Gas Reservoir geology and Exploitation&institute of Sedimentary geology Chengdu University of TechnologyChengdu 610059China School of Earth sciences and Key Laboratory of Mineral Resources in Western China(Gansu Province) Lanzhou UniversityLanzhou 730000China Key Laboratory of Strategic Mineral Resources of the Upper Yellow River Ministry of Natural ResourcesLanzhou 730000China State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and PaleoenvironmentChinese Academy of SciencesNanjing 210008China institute of geology Chinese Academy of Geological SciencesBeijing 100037China State Key Laboratory for Mineral Deposits Research Nanjing UniversityNanjing 210023China

Stratigraphic knowledge,the cornerstone of geoscience,needs to be represented by the Knowledge Graph based upon ontology,in order to apply the state-of-the-art big-data *** study aims to comprehensively construct the ontologies for the stratigraphic *** has been achieved by a federated,crowd intelligence-based collaboration among domain experts of major stratigraphic *** initial step is to enumerate key terms from authoritative references and incorporate them into the Geoscience Professional Knowledge Graphs(GPKGs)of Deep-time Digital Earth *** this process,semantic heterogeneities were meticulously addressed by professional judgement aided by an automatic detection of Homonyms at the GPKGs ***,these terms were further differentiated as either classes or properties and arranged in a hierarchical framework in a top-down ***,seven ontologies are constructed for major stratigraphic branches,i.e.,Lithostratigraphy,Biostratigraphy,Chronostratigraphy,Chemostratigraphy,Magnetostratigraphy,Cyclostratigraphy and Sequence *** ontology of Biostratigraphy,among them,is elaborated here,as no biostratigraphic ontology has been attempted before to our *** constructed biostratigraphic ontology comprises following major root classes:Fossil,Biostratigraphic unit,Biostratigraphic ***,they contribute to the eventual dating and correlating of strata in another root class:Biostratigraphic *** summary,the achievements of this study are probably heretofore the most comprehensive ontologies for the stratigraphic ***,a proto model of semantic search engine was conceived to discuss potential application of our work for better querying stratigraphic references,utilizing the semantic liaison of the classes in the constructed ontologies.

关键词： Domain ontology Stratigraphy Biostratigraphic unit Biostratigraphic horizon Fossil

Land submerged to carbonate platform by conodonts: paleoenvironment reconstruction of the western Gangdese in Tibet during Triassic

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China geology 2018年第3期1卷 450-452页

作者： Zhan-sheng Ji Jian-xin Yao Gui-chun wu Qian Sun Qiu-yuan shi hao Li Ji-fu He Shao-wen Zhang chinese academy of geological Science CAGSBeijing 100037China institute of geology CAGSBeijing 100037China

The western Gangdese in Tibet during Triassic was previously considered to be a part of the Gangdese Oldland (Zhao ZZ et al.,2001;Fig.1).If the Gangdese Oldland did exist,it means no prospect of petroleum exploration of the Triassic strata in western Gangdese ***,the recent biostratigraphic progresses don’t support the existence of the Gangdese *** paper aims to briefly introduce the new paleogeographic interpretation and the reason that the western Gangdese in the Triassic was marine instead of terrigenous on the basis of the recent conodont data.

关键词： Land submerged western Gangdese carbonate platform

西藏措勤盆地晚侏罗世牛津期—基默里奇期沉积环境及油气勘探意义

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地球学报 2018年第4期39卷 445-452页

作者：孟亚洲纪占胜武桂春孙倩石秋圆李浩中国地质科学院北京100037 汉中职业技术学院陕西汉中723002 中国地质科学院地质研究所国土资源部地层与古生物重点实验室北京100037 中国地质大学(北京) 北京100083

前人长期认为措勤盆地的晚侏罗世古地理格局为“南陆北海”,即盆地南部为古陆环境,北部为大面积的碎屑岩相滨浅-斜坡环境。然而,近几年来,在措勤盆地内部的仲巴县仁多地区、申扎县雄梅地区、班戈县保吉地区,及其北侧毗邻的改则县物玛地... 详细信息

前人长期认为措勤盆地的晚侏罗世古地理格局为“南陆北海”,即盆地南部为古陆环境,北部为大面积的碎屑岩相滨浅-斜坡环境。然而,近几年来,在措勤盆地内部的仲巴县仁多地区、申扎县雄梅地区、班戈县保吉地区,及其北侧毗邻的改则县物玛地区、双湖县多玛地区相继发现了厚度数百米到上千米厚的上侏罗统碳酸盐岩地层。这些地层的发现说明盆地南部并不是地层缺失的古陆,盆地北部也不是大面积的碎屑岩沉积。晚侏罗世牛津期—基默里奇期盆地并非表现为从南向北水体明显加深的趋势,而是中部和北部为碳酸盐岩台地环境,南部为斜坡环境。措勤盆地晚侏罗世牛津期—基默里奇期较为稳定的碳酸盐岩台地环境和广阔的空间为生物礁的发育提供了有利条件,措勤盆地晚侏罗世牛津期—基默里奇期的生物礁应该有广阔的分布,显示出其良好的油气勘探潜力。

关键词：西藏措勤盆地晚侏罗世古地理格局油气勘探

鄂尔多斯盆地临兴地区致密砂岩储层岩石力学参数和地应力分析

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中国海上油气 2023年第6期35卷 51-59页

作者：张兵冯兴强米洪刚张海峰史浩苏羽吴林中联煤层气有限责任公司北京100016 中国地质科学院地质力学研究所北京100081

地质力学分析在油气勘探开发过程中发挥重要作用,但临兴地区下石盒子组储层地应力研究相对滞后。在岩石力学实验和阵列声波测井分析基础上,对临兴地区下石盒子组储层致密砂岩岩石力学参数和地应力开展评价。结果表明:①临兴地区下石盒... 详细信息

地质力学分析在油气勘探开发过程中发挥重要作用,但临兴地区下石盒子组储层地应力研究相对滞后。在岩石力学实验和阵列声波测井分析基础上,对临兴地区下石盒子组储层致密砂岩岩石力学参数和地应力开展评价。结果表明:①临兴地区下石盒子组静态杨氏模量14.7~37.1 GPa,静态泊松比0.207~0.294,致密砂岩动静态岩石力学参数呈良好的线性关系,Ⅰ类、Ⅱ类到Ⅲ类储层,杨氏模量和泊松比明显增大;②临兴地区下石盒子组最大水平主应力43~94 MPa,最小水平主应力在4~27 MPa,Ⅰ类、Ⅱ类到Ⅲ类储层,致密砂岩最大和最小水平主应力明显增大。本研究成果可为临兴地区滚动勘探开发提供基础地质依据。

关键词：鄂尔多斯盆地临兴地区致密砂岩岩石力学参数地应力储层

准南四棵树凹陷沉积古环境与物源研究——来自侏罗系—下白垩统元素地球化学的指示

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沉积学报 2022年第4期40卷 1122-1136页

作者：朱明施辉袁波冯兴强吴林唐雪颖张浩庞志超新疆油田分公司勘探开发研究院新疆克拉玛依834000 中国地质科学院地质力学研究所北京100081 新疆油田分公司勘探开发研究院地球物理研究所乌鲁木齐830013

准噶尔盆地西南缘四棵树凹陷下组合油气勘探程度较低,并在侏罗纪—早白垩世沉积古环境演化的认识上还存在分歧,影响了对层序和沉积演化的理解,制约了勘探进程。利用便携式XRF元素仪大量、快速、无损地测试了北天山山前塞力克提沟和扎伊... 详细信息

准噶尔盆地西南缘四棵树凹陷下组合油气勘探程度较低,并在侏罗纪—早白垩世沉积古环境演化的认识上还存在分歧,影响了对层序和沉积演化的理解,制约了勘探进程。利用便携式XRF元素仪大量、快速、无损地测试了北天山山前塞力克提沟和扎伊尔山前吐孜阿克内沟侏罗系—下白垩统野外露头细粒沉积物的元素地球化学数据,结合钻井岩心的重矿物分析,重建了凹陷侏罗纪—早白垩世的古气候、古盐度、古氧化—还原条件和古物源的演化历史。研究结果表明:从J1b至K1q时期,古气候表现为从温湿向干热变化的趋势,早侏罗世温度相对偏高、湿度偏低,中—晚侏罗世温度下降至最低、湿度增至最大,而K1q时期以干热气候为主。沉积水体总体为淡水,盐度受古气候的影响较大,早侏罗世相对偏高,中—晚侏罗世相对最低,K1q时期沉积水体盐度达到弱咸化程度。J1s古水体相对最深、还原性最强,J1b平均古水深相对较浅,处于弱氧化—弱还原状态,中侏罗世至K1q时期平均古水深逐渐减小,从弱还原向氧化环境递变。凹陷在侏罗纪主要受南部北天山物源区的影响,K1q时期北部的扎伊尔山物源区供源作用逐渐变强;J/K之交,北天山物源区母岩混入部分凝灰岩,而扎伊尔山物源区变质岩类型母岩组分升高较明显。

关键词：便携XRF元素仪沉积古环境元素地球化学四棵树凹陷