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Metallogenic epoch and genesis of the gold deposits in Jiaodong Peninsula, Eastern china. a regional review

Progress in Natural Science:Materials International 2007年第2期17卷 138-143页

作者： YANG Liqiang, DENG Jun, GE Liangsheng, WANG qingfei, ZHANG Jing, GAO Bangfei, JIANG Shaoqing and XU hao ( state key laboratory of {2. processes and mineral resources, china university of geosciences, Beijing {12., china.key laboratory of Lithosphere Tectonics and Lithoprobing Technology of Ministry of Education, china university of geosciences, Beijing {12., china. [a]state key {2. of {2. processes and mineral resources China University of Geosciences Beijing China [b]key laboratory of Lithosphere Tectonics and Lithoprobing Technology of Ministry of Education China University of Geosciences Beijing China

Gold deposits are characterized by multi-sources, superimposition, large scale and temporal-spatial concentration in Jiaodong Peninsula, Eastern china. In this paper, we review the history and the development of the study on metallogenic chronology and genesis of gold deposits, summarize the main features of superimposed metallogenesis, provide evidence of the Mesozoic complex metallogenic system, and point out some problems for further research of Jiaodong gold deposit cluster from a regional view. Although gold deposits are different in genetic types, ore-forming materials and geological settings, our research indicates that the accumulation and emplacement of the ore-forming materials are temporally-spatially concentrated on a large scale, and the main metallogenic epoch of Jiaodong gold deposits was concentrated in Mesozoic. Metallogenic chronology and geological-geochemical data indicate that there are two periods of gold mineralizations occurred in 130-110 Ma and 90-80 Ma respectively in Jiaodong ore cluster. The gold deposit cluster results from the superimposition of the polygenetic mineralization, and further study is needed to investigate the formation and evolution of the Mesozoic complex metallogenic system.

关键词： superimposed metallogenic system Mesozoic Jiaodong ore cluster.

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Thermodynamic calculation and modeling of the CH4-H2. fluid inclusions

Thermodynamic calculation and modeling of the CH4-H2O fluid ...

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中国矿物岩石地球化学学会第13届学术年会

作者： MAO Shi-de~1,DUAN Zhen-hao~2 1.state key laboratory of {2. processes and mineral resources,and School of Earth sciences and resources,china university of geosciences,Beijing,100083,china.2.key laboratory of the Earth’s Deep Interior,institute of geology and geophysics,chinese academy of sciences,Beijing 10002., china

This work reports in detail the application of thermodynamic models or equations of state to the CH-HO fluid inclusions.A general method is presented to calculate the compositions of the CH-HO inclusions using the volume fractions and the dissolution temperatures of CH *** calculate the homogenization pressures and isolines of the CH-HO inclusions,an improved activity-fugacity model is developed to predict the vapor-liquid phase *** phase equilibrium model can predict methane solubility in liquid phase and water content in vapor phase from 2.3 K to 62. K and from 1 bar to 1000 bar(up to 2.00 bar for the liquid phase),within or close to experimental *** to a lot of reliable experimental phase equilibrium data,an average deviation of the water content in the vapor phase and methane solubility in the liquid phase is 4.2.%and 3.63%,

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Extrapolate well logs based on the constrained interpolation algorithm

Extrapolate well logs based on the constrained interpolation...

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中国科学院地质与地球物理研究所2.08学术年会

作者： liu hongwei,liu hong,{2.,and shou hao 1.institute of geology and geophysics,chinese academy of sciences,Beijing 10002.,china. 2.state key laboratory of geological processes and mineral resources,china university of geosciences,Beijing,100083 3.The Exploratory development institute of Daqing Oilfield Limited Liability Company,Daqing 163712.{12. 4.Research institute of Exploration and Development of chinese Petroleum,Beijing 100083,{12.

Based on a detailed analysis of differences between seismic data and well logs, we discuss the problem of matching seismic traces and well logs and present a new matching method based on event search in instantaneous phase which greatly improves seismic *** method is based on flattening events in instantaneous phase to compare the seismic traces to the well log traces with the same *** calculate the coefficients using the singular value decomposition method to extrapolate the well *** a result,the events in the seismic profile are continuous and match well with well *** apply this method to the Mao-2.well in Daqing Oilfield with good results.

关键词： events flattening SVD method instantaneous phase correlation

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Silurian granulite-facies metamorphism,and coeval magmatism and crustal growth in the Tongbai orogen,central china

Silurian granulite-facies metamorphism,and coeval magmatism ...

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中国矿物岩石地球化学学会第13届学术年会

作者： WANG hao~1,WU Yuan-bao~(1,2),GAO Shan~1,ZHANG hong-fei~1, liu Xiao-chi~1,GONG Hu-jun~2,PENG Min~3,WANG Jing~4,YUAN hong-lin~2 1.{2. key laboratory of geological processes and mineral resources,Faculty of Earth sciences,china university of geosciences, Wuhan 430074,china.2.state key laboratory of Continental Dynamics,Department of geology,Northwest university,Xi’an 710069,china.3.institute of Geophysical and Geochemical Exploration CAGS,Langfang 065000,china.4.Anhui institute of geology,Hefei 230001,{2.}

It is intriguing whether the formation of granulite in an orogenic belt is related to magmatism and crustal *** Tongbai orogen is one of the particular areas in the qinling-Tongbai-Dabie-Sulu orogen that contains both granulites and associated arc magmatic rocks,and thus is an optimal place to address this ***,the formation age and genesis of the granulites and their relations to the magmatic rocks have not yet been well *** situ LA(MC)-ICPMS U-Pb dating,and trace element and Lu-Hf isotope analyses were undertaken on zircon grains from gneiss,granulite,gabbro and granodiorite *** zircons in three granulite samples and a gneiss sample have core-rim *** cores have oval or rounded shapes,oscillatory zones,high Th/U ratios and variable U-Pb ages,suggesting a detrital *** youngest group of the detrital zircons yields a weighted mean pb/U age of(450-±5) Ma,which is interpreted as the maximum depositional age of their protoliths.A major age cluster is ca.450～490 Ma,corresponding to prolonged arc magmatism in the northern Tongbai and qinling *** group of ages range from 660 to 950 Ma,implying that the qinling Group

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geology,Geochemistry,and Genesis of the Tongcun Reduced Porphyry Mo(Cu) Deposit,NW Zhejiang Province,china

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Acta Geologica Sinica(English Edition) 2015年第3期89卷 766-782页

作者： TANG Yanwen LI Xiaofeng XIE Yuling HUANG Cheng WEI hao CAI Jiali YIN Yifan qin Chaojian liu Rong state key {2. of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of Sciences School of Civil and Environmental Engineering institute University of Science and Technology Beijing Zhejiang No.3 geological Team

The Tongcun Mo（Cu） deposit in Kaihua city of Zhejiang Province,eastern china.occurs in and adjacent to the Songjiazhuang granodiorite porphyry and is a medium-sized and important porphyry type ore *** irregular Mo（Cu） orebodies consist of various types of hydrothermal *** hydrothermal alteration contains skarnization,chloritization,carbonatization,silicification and *** on mineral assemblages and crosscutting relationships,the oreforming {2. are divided into five stages,i.e.,the early stage of garnet ＋ epidote ± chlorite associated with skarnization and K-feldspar ＋ quartz ± molybdenite veins associated with potassicsilicic alteration,the quartz-sulfides stage of quartz ＋ molybdenite ± chalcopyrite ± pyrite veins,the carbonatization stage of calcite veinlets or stockworks,the sericite ＋ chalcopyrite ± pyrite stage,and the late calcite ＋ quartz *** the quartz-bearing samples in the early stage and in the quartzsulfides stage are suitable for fluid inclusions（FIs） *** types of FIs were observed,including1） CO2.CH4 single phase FIs,2. CO2.bearing two- or three-phase FIs,3） Aqueous two-phase FIs,and4） Aqueous single phase *** of the early stages are predominantly CO2. and CH4-rich FIs of the CO2.CH4-H2.-NaCl system,whereas minerals in the quartz-sulfides stage contain CO2.rich FIs of the CO2.H2.-NaCl system and liquid-rich FIs of the H2.-NaCl *** the CO2.CH4 single phase FIs of the early mineralization stage,the homogenization temperatures of the CO2.phase range from 15.4 ℃ to 2..3 ℃（to liquid）,and the fluid density varies from 0.7 g/cm^3 to 0.8 g/cm^3;for two- or three-phase FIs of the CO2.CH4-H2.-NaCl system,the homogenization temperatures,salinities and densities range from 312. to 412.,7.7 wt%NaCl *** 10.9 wt%NaCl eqv.,and 0.9 g/cm^3 to 1.0 g/cm^3,*** CO2.H2.-NaCI two- or threephase FIs of the quartz-sulfides stage,the homogenization temperatures and salinities range from2.5℃ to 4

关键词： Tongcun Mo (Cu) deposit fluid inclusions reduced ore fluids porphyry type isotopegeochemistry ore genesis

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Definition and Classification of Low-Resistivity Oil Zones

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Journal of china.university of Mining and Technology 2006年第2期16卷 228-232页

作者： liu Shuang-lian liu Jun-lai LI {2. ZHOU Yong-sheng state key {2. of {2. processes and mineral resources China University of Geosciences Beijing 100083 China key laboratory of Lithosphere Tectonics and Lithoprobing Techology of Ministry of Education China University of Geosciences Beijing 100083 China Exploration and Production Research institute SINOPEC Beijing 100083 China china.university of Petroleum Beijing 102249 China Exploration and Production Research institute PetroChina Beijing 100083 China

Although the analysis of the microcosmic mechanism for low-resistivity oil zones has received much attention in china. the intrinsic relationship between low-resistivity oil zones and geological background is still under-developed. Based on the {2. and logging analysis, we redefine low-resistivity oil zones. According to their genesis, low-resis- tivity oil zones can be distinguished as five different classes: low-resistivity oil zones formed by tectonic settings, by depositional settings, by diagenetic settings, by invaded settings and those which are formed by the compounding geneses respectively. We make the following observations from this study on the definition and classification of low-resistivity oil zones: 1) A low-resistivity oil reservoir has macroscopic and microscopic unity. 2. The genesis of low-resistivity oil zones varies with the type of petroliferous basin. 3) Some low-resistivity oil zones can be forecasted based on the geological study results. 4) The results in this paper suggest that well logging information is generated from two cause mechanisms, the geophysical factors and the geological setting. Future studies on the geological background cause mechanism and the theory of well logging information will enrich the theory of logging {2. and improve the ability to forecast oil zones.

关键词： low-resistivity oil zone geologic background genesis classification

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北秦岭超高压榴辉岩中长英质脉体的锆石U-Pb年龄及其地质意义

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地球科学 2018年第2期43卷 389-400页

作者：何宇赵宇洁张文祥王浩周光颜吴元保中国地质大学地质过程与矿产资源国家重点实验室湖北武汉430074 中国地质大学地球科学学院湖北武汉430074 中国科学院岩石圈演化国家重点实验室北京100029 中国科学院地质与地球物理研究所北京100029

北秦岭地区的早古生代超高压变质作用是整个秦岭-桐柏-红安-大别-苏鲁造山带内最古老的超高压变质记录,代表华南与华北板块之间最早的一期增生碰撞事件,然而目前对于该地区早古生代的构造演化过程仍存在较大争议.对北秦岭官坡超高压榴... 详细信息

北秦岭地区的早古生代超高压变质作用是整个秦岭-桐柏-红安-大别-苏鲁造山带内最古老的超高压变质记录,代表华南与华北板块之间最早的一期增生碰撞事件,然而目前对于该地区早古生代的构造演化过程仍存在较大争议.对北秦岭官坡超高压榴辉岩中的一个长英质脉体开展了详细的锆石形态学、微量元素和U-Pb年代学研究.结果表明,脉体中的锆石呈自形的棱柱状晶形,发育弱的振荡环带、面状分带或无明显分带特征,具有高的HREE、Y、U含量,低的Th含量和Th/U比值,说明锆石生长自含水熔体.另外,这些变质锆石具有LREE亏损、HREE相对富集的配分模式以及明显的Eu负异常,表明含水熔体形成于角闪岩相退变质过程.锆石的2.6Pb/2.8 U加权平均年龄为494±10Ma(MSWD=2.2.,与北秦岭超高压变质作用的峰期年龄(490.4±5.8Ma)在误差范围内基本一致.北秦岭地体经历深俯冲作用之后发生快速折返,并在折返过程中发生角闪岩相退变质作用诱发俯冲板片部分熔融产生含水熔体.

关键词：北秦岭长英质脉体锆石U-Pb 锆石微量元素快速折返地球化学地质年代学

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LA-ICPMS zircon U-Pb geochronological constraints onthe tectonothermal evolution of the Early Paleoproterozoic Dakendaban Group in the Quanji Block, NW china

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chinese Science Bulletin 2008年第18期53卷 2849-2858页

作者： WANG qinYan CHEN NengSong LI XiaoYan hao Shuang CHEN Hai{2. Faculty of Earth sciences China University of Geosciences Wuhan 430074 China Tianjin institute of geology and {2. resources China Geological Survey Tianjin 300170 China state key {2. of {2. processes and mineral resources China University of Geosciences Wuhan 430074 China

The Quanji Block, situated between the northern margin of the Qaidam Block and the South Qilian orogenic belt in the NE qinghai-Tibet Plateau, china. is thought to represent a remnant continental crust. In this study, LA-ICPMS U-Pb analyses of detrital zircon grains from two mesosomes in the migmatitic Dakendaban Group yield ages of 2.67+2./−2. Ma and 2.74+66/−52.Ma, respectively. Zircon grains from a leucosome give two distinct ages of 2.71+18/−16 Ma and 192.+14/−15 Ma. Zircon from a granitic pegmatite that intruded into the Dakendaban Group yields an age of 2.2.+44/−38 Ma. These data suggest that the Early Paleoproterozoic Dakendaban Group deposited between ∼2.43 to ∼2.47 Ga and has been subject to an intrusive event at 2.43 Ga, and regional metamorphism-anatexis at 1.92.Ga. The common lower intercept age of ∼0.9 Ga probably records a significant Early Neoproterozoic event in the Quanji Block.

关键词：地质学地质年代岩石青藏高原

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Phase Equilibria Constraints on Relations of Ore-bearing Intrusions with Flood Basalts in the Panxi Region,Southwestern china

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Acta Geologica Sinica(English Edition) 2009年第2期83卷 295-309页

作者： ZHANG Zhaochong hao Yanli AI Yu LI Yin Zhao Li state key {2. of {2. processes and mineral resources University ofGeosciences Beijing 100083 China institute of geology Chinese Academy ofGeosciences Beijing 100037 China

There are two types of temporally and spatially associated intrusions within the Emeishan large igneous province （LIP）; namely, small ultramafic subvolcanic sills that host magmatic Cu-Ni-Platinum Group Element （PGE）-bearing sulfide deposits and large mafic layered intrusions that host giant Ti-V magnetite deposits in the Panxi region. However, except for their coeval ages, the genetic relations between the ore-bearing intrusions and extrusive rocks are poorly understood. Phase equilibria analysis （Q-PI-OI-Opx-Cpx system） has been carried out to elucidate whether ore-bearing Panzhihua, Xinjie and Limahe intrusions are co-magmatic with the picrites and flood basalts （including high-Ti, low-Ti and alkali basalts）, respectively. In this system, the parental magma can be classified as silica-undersaturated olivine basalt and silica-saturated tholeiite. The equivalents of the parental magma of the Xinjie and Limahe peridotites and picrites and low-Ti basalts are silica-undersaturated, whereas the Limahe gabbro-diorites and high-Ti basalts are silica-saturated. In contrast, the Panzhihua intrusion appears to be alkali character. Phase equilibria relations clearly show that the magmas that formed the Panzhihua intrusion and high-Ti basalts cannot be co-magmatic as there is no way to derive one liquid from another by fractional crystallization. On the other hand, the Panzhihua intrusion appears to be related to Permian alkali intrusions in the region, but does not appear to be related to the alkali basalts recognized in the Longzhoushan lava stratigraphy. Comparably, the Limahe intrusion appears to be a genetic relation to the picrites, whereas the Xinjie intrusion may be genetically related to be low-Ti basalts. Additionally, the gabbro-diorites and peridotites of the Limahe intrusion are not co-magmatic, and the former appears to be derived liquid from high-Ti basalts.

关键词： layered intrusions phase equalibria Cu-Ni sulfide deposit V-Ti-Fe oxide deposit,Emeishan

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Discrepant chemical differentiation and magmatic-hydrothermal evolution of high-silica magmatism associated with Pb–Zn and W mineralization in the Lhasa terrane

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Geoscience Frontiers 2022年第5期13卷 32-49页

作者： Shunbao Gao Xin Chen Youye Zheng Nan Chao Shunli Zheng hao Lin Xiaojia Jiang Song Wu institute of geological Survey China University of GeosciencesWuhan 430074China state key {2. of {2. processes and mineral resources School of Earth ResourcesChina University of GeosciencesWuhan 430074China key laboratory of Deep–Earth Dynamics of Ministry of Natural {2. Institute of GeologyChinese Academy of Geological SciencesBeijing 100037China School of Earth sciences and resources China University of GeosciencesBeijing 100083China

High-silica(SiO_(2.>70 wt.%)granites(HSGs)are the main source of W,Sn,and rare ***,abundant HSGs,temporally,spatially,and genetically associated with Pb-Zn mineralization,in the Lhasa terrane(LT),provided an ideal opportunity to study the key factors responsible for Pb-Zn enrichment,instead of W-Sn *** we contribute to this topic through U-Pb dating of zircon and garnet,and whole-rock and Sr-Nd-Hf isotopic geochemistry of ore-related quartz porphyries in the Bangbule deposit and compared these results with published data from large and giant Pb-Zn and W deposits in the *** magmatism-alteration-mineralization event in the Bangbule deposit was recorded by robust zircon U-Pb ages of 77.3±0.9 Ma and hydrothermal garnet U-Pb ages of 75.7±4.8 Ma,which is 10-15 Ma earlier than the main Paleocene metallogenic event and the first record of late Cretaceous Pb-Zn polymetallic mineralization in the *** late Cretaceous-Paleocene magmatism and mineralization events are a response to the subduction of Neotethyan oceanic lithosphere,which occurred as a result of the collision of the Indian and Asian *** HSGs related to Pb-Zn mineralization,with high totalalkalis and low magnesian contents,are enriched in Ba,Th,and Rb,but depleted in Ti,Eu,Sr,and *** belong to either the S-type,or I-type *** Sr-Nd-Hf isotopic compositions of the Pb-Zn mineralized granites demonstrate that they were generated by the partial melting of Proterozoic basement with or without mantle-derived melt *** was consistent with the postulated source of W enrichment in the *** Pb-Zn and W related granites have similar zircon-Ti-saturation temperatures,comparable low whole-rock Fe_(2.O_(3)/FeO ratios,and zircon oxygen *** indicated that the Pb-Zn-W enrichment in the high-silica magma system could be attributed to a relatively reduced *** Pb-Zn related HSGs,abundant quartz and feldspar phenocrysts,and weak fractionation of twin-elements in wh

关键词： High-silica granites(HSGs) Magmatic-hydrothermal evolution Regional metallogeny Bangbule Southern china

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