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A special intermediate-low temperature PGE-As-Co mineralization

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Chinese Science Bulletin 1999年第S2期44卷 42-44页

作者： wang Jingbin, wang Yuwang and wang lijuan beijing institute of geology for mineral resources, china National Nonferrous Metal Industry Corporation, beijing 100012 china Research Center of mineral resources Exploration, Chinese Academy of Sciences, beijing 100101, china

THIS paper introduces a new type of platinum-group elements (PGE) mineralization formed under a special condition of intermediate to low temperature, i. e. Huanggang PGE-As-Co deposit related to cryptoex-plosive hornblendite, Inner Mongolia, of which the proven reserves of arsenic reached small size. 1 geology of mineral district Huanggang PGE-As-Co deposit, located at the margin of Huanggang Mesozoic volcanic basin in thesouthern part of Da Hinggan Range, was controlled by both Huanggang-Ganzhuermiao deep fracture andvolcanic apparatus. The volcanic apparatus in a protruding cupola land-form is about 0.2. km^2. It wasfilled with rhyolitic volcanic breccia, brecciated tuff, subvolcanic dacite porphyry and brecciated lava ofvolcanic neck facies. The host hornblendite, of which Rb-Sr isochron age (bulk rock) is (90.66 ±14.44) Ma, intruded into the apparatus in the form of irregular dike (figure 1).

关键词： intermediate-low temperature PGE-As-Co mineralization Inner Mongolia.

Typical basin-fill sequences and basin migration in Yanshan, North china ——Response to Mesozoic tectonic transition

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Science china Earth Sciences 2004年第2期47卷 181-192页

作者： LI Zhong, LIU Shaofeng, ZHANG Jinfang & wang Qingchen1. institute of {2. and Geophysics, Chinese Academy of Sciences, beijing 10002., china 2. china University of Geosciences, beijing 100083, chinaCorrespondence should be addressed to Li Zhong (email: lizhongd@***) 1. institute of geology and Geophysics Chinese Academy of Sciences 100029 Beijing China 2. china University of Geosciences 100083 Beijing China

Basin-fill sequences of Mesozoic typical basins in the Yanshan area, North china may be divided into four phases, reflecting lithosphere tectonic evolution from flexure (T3), flexure with weak rifting (J1+2., tectonic transition (J3), and rifting (K). Except the first phase, the other three phases all start with lava and volcaniclastic rocks, and end with thick coarse clastic rocks and/or conglomerates, showing cyclic basin development rather than simple cyclic rift mechanism and disciplinary basin-stress change from extension to compression in each phase. Prototype basin analysis, based on basin-fill sequences, paleocurrent distribution and depositional systems, shows that single basin-strike and structural-line direction controlling basin development had evidently changed from east-west to northeast in Late Jurassic in the Yanshan area, although basin group still occurred in east-west zonal distribution. Till Early Cretaceous, main structural-line strike controlling basins just turned to northeast by north in the studied area.

关键词： Yanshan, Mesozoic, basin-fill, paleocurrent, tectonic transition.

Genesis of excess argon in phengite and significance of ^(40)Ar-^(39)Ar age spectra for omphacite:A case study on UHP eclogite of South Dabie Terrain,china

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Chinese Science Bulletin 2000年第15期45卷 1345-1351页

作者： wang Songshan, GE Ningjie, SANG Haiqing & QIU Ji1. institute of {2. and Geophysics, Chinese Academy of Sciences, beijing 10002., china 2. Department of Earth and Space Science, University of Science and Technology of china, Hefei 2.002., china Correspondence should be addressed to wang Songshan institute of geology and Geophysics Chinese Academy of Sciences Beijing China Department of Earth and Space Science University of Science and Technology of China Hefei China

The Ar-Ar dating of phengite and omphacite in ultrahigh-pressure (UHP) eclogite of Bixiling and Hengchong in the South Dabie Terrain shows that the content range of excess argon is as high as (0.4-1.3)×10 8 mol· g 1. The genesis of the excess argon is discussed. The Ar-Ar age spectra of omphacite could not support the opinion that the UHP metamorphism occurred in Caledon epoch and pre-Caledon epoch.

关键词： South Dabie Terrain ultrahigh-pressure metamorphics phengite omphacite excess argon.

Ore-forming fluid and mineralization of Caijiaying and Dajing polymetallic ore deposits

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Ore-forming fluid and mineralization of Caijiaying and Dajin...

中国科学院地质与地球物理研究所2.04学术年会

作者： wang lijuan~(1,2.,wang Jingbin~(1,2.,wang Yuwang~(1,2. & ZHU Heping~1 1.Key Laboratory of mineral resources,institute of geology and Geophysics,Chinese Academy of Sciences,beijing 10002.,china 2.beijing institute of geology for mineral resources,beijing 100012,china

Fluid inclusions from the Dajing and Caijiaying deposits have nearly the same homogenization *** between temperature and salinity shows that both Snand Cu-bearing fluids Sn and Cu were present in the Dajing deposit but only one kind of fluids continuously evolved in the Caijiaying *** on rare earth elements(REE) in ancient fluid from the inclusions indicates that the fluid of Sn mineralizing stage in Dajing was derived from remelting magma of the continental crust,and the fluid of Cu-Pb-Zn mineralizing stage in the Dajing deposit and the fluid of Cu-Pb-Zn mineralization in the Caijiaying deposit were derived from the *** is concluded that the Cu-Pb-Zn mineralizations in the Dajing and Caijiaying deposits resulted from the identical tectono-thermal event of magma-fluids induced by Mesozoic tectonic transition and extension in the eastern part of North china Craton.

关键词： Caijiaying Dajing Mesozoic tectonic transition ore-forming fluid REE

Ultramafic xenoliths in Mesozoic diorite in west Shandong Province

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Science china Earth Sciences 2004年第6期47卷 489-499页

作者： CHEN Lihui1,2.& ZHOU Xinhua2.1.The Key Laboratory of Orogenic Belts and Crustal Evolution,Ministry of Education,china and School of Earth and Space Sciences,Peking University,beijing 100871,china 2.institute of geology and Geophysics,Chinese Academy of Sciences,beijing 10002.,china Correspondence should be addressed to Chen Lihui(email: lihui_chen@***) 1. The Key Laboratory of Orogenic Belts and Crustal Evolution Ministry of Education China and School of Earth and Space Science Peking University 100871 Beijing China 2. institute of geology and Geophysics Chinese Academy of Sciences 100029 Beijing China

Ultramafic xenoliths are common in Tietonggou intrusion, Laiwu, Shandong Prov-ince. Peridotite xenoliths develop two-stage metasomatism popularly: (i) The early metasoma-tism is characterized by intergranular clinopyroxene and phlogopite; (ii) The later metasomatism is characterized by orthopyroxene veins with a few plagioclases and amphiboles. These ul-tramafic xenoliths are thought to be mostly from the crust-mantle transitional zone on the basis of their combination, mineral chemistry, equilibrium temperature, and metasomatic characteristics. Major elements, rare earth elements, and Sr-Nd isotopic composition of the ultramafic xenoliths indicate that there is a petrogenetic relationship between the silica-enriched xenoliths and their host diorites. We propose that such silica enrichment might be an indicator of melt-rock interac-tions in the Mesozoic lithosphere beneath western Shandong.

关键词： ultramafic xenoliths, crust-mantle transitional zone,metasomatism, Tietonggou intrusion, Laiwu.

The fluid mineralization characteristics of gold deposits in Jungger-East Tianshan mountains area,Xingjiang

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The fluid mineralization characteristics of gold deposits in...

First Meeting Asia Current Research on Fluid Inclusion

作者： lijuan wang, Jingbin wang, Yuwang wang, Heping Zhu, Lili Qu beijing institute of geology for mineral resources, beijing 100012, china Key Laboratory of mineral resources, institute of geology and Geophysics, Chinese Academy of Sciences, beijing 10002., china

The Junggar-eastern Tianshan area of Xinjiang Automous Region is situated at the northwestern part of china. Collisional orogeny in the area took place in the Carboniferous-Permian and underwent a history of contraction and subsequent extension. The gold, copper and nickel mineralization in the area also took place in the Carboniferous-Permian. Therefore, gold mineralization in the area coincides with the collisional orogeny in timing, distribution and geodynamic setting.

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QUADRUPOLE MASS SPECTROMETER USED FOR DETERMININGGASEOUS COMPOSITION OF FLUID INCLUSIONS

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QUADRUPOLE MASS SPECTROMETER USED FOR DETERMININGGASEOUS COM...

中国科学院地质与地球物理研究所2.02.术年会

作者： Zhu Heping~a wang lijuan~(a,b) a.{2. of geology and Geophysics Chinese Academy of Sciences,beijing,100101 a.beijing {2. of geology for mineral resources,beijing,china

Quadrupole mass spectrometry(QMS) is an instrument for effectively determining gaseous composition of fluid *** gaseous component is extracted from inclusions with thermal decrepitation method and then determined with the sensitive QMS *** method is characterized by high sensitivity and high accuracy with the relative standard deviation(RSD,n=6) of less than 3%.It has been successfully used for analyzing fluid *** analytical results meet the requirement of geological study.

关键词： quadrupole mass spectrometer Gaseous composition fluid inclusion

Fluid-melt Inclusions in Fluorite of the Huanggangliang Skarn Iron-Tin Deposit and Their Significance to mineralization

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Fluid-melt Inclusions in Fluorite of the Huanggangliang Skar...

中国科学院地质与地球物理研究所2.01学术年会

作者： wang lijuan~(1,2.,wang Jingbin~(1,2.,wang Yuwang~(1,2. and MAO Qian~1 1 institute of geology and Geophysics,Chinese Academy of Sciences, A-11 Datun Road,beijing 100101 2.beijing institute of geology for mineral {{12.,beijing 100012

For the first time,fluid-melt inclusions are found in fluorite of the Huanggangliang skarn iron-tin deposit(HSID).The fluorite was formed in the main stage of mineralization,named the hydro-skarnization *** inclusions contain various components such as Fe,Mg and Cr from deep *** melts of primary inclusions are mainly Ca- and F-rich and those of secondary inclusions tend to become *** this evolution process,the melts and iron daughter minerals decreased and even *** facts reveal that the evolution of the primary mineralizing fluids and the differentiation of the fluids and melts are the main factors leading to the deposition of Fe,Sn and other *** discovery confirms the magmatic genesis of the HSID and has filled in the gaps in the research of magmatogenic skam deposits and furnished new methods for such ***,it has enlarged the scope of the research on fluid inclusions.

关键词： skarn deposit fluorite fluid-melt inclusion daughter mineral melt composition

Controls on reservoir quality in the paleogene Kalatar Formation of the southwestern region of the Tarim Basin,china

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Petroleum Science 2011年第3期8卷 302-315页

作者： Yang Haijun Shen Jian-Wei wang Xu Zhang lijuan Li Meng Key Laboratory of Marginal Sea geology of CAS South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China Exploration and Development Research institute Tarim Oilfield Company Petroleum Company Limited Korla 841000 China Graduate School of the Chinese Academy of Sciences Beijing 100049 China

The Paleogene Kalatar Formation is a main target for petroleum ex12. ploration in the southwestern region of the Tarim Basin （SWRTB） and a systematical summary of controls on reservoirs of high quality has important implications for this area. According to outcrop analysis, as well as core, and laboratory experiments based on theories of sedimentology, it can be inferred that the main pore types in the Kalatar Formation are moldic, vuggy, intercrystalline and interparticle pores, fractures, and mudstone microporosity, respectively. The foreshore in the shore-shelf depositional model is the most favorable target, wherein grainstone and dolomitized grainstone are characterized by high quality in a middle ramp subfacies of the carbonate ramp model. Diagenetic factors, such as micritization, cementation, compaction, neomorphism, silicification, and pyritization, are detrimental for reservoirs. At the same time, leaching and dolomitization can improve the quality of reservoirs. Permeability of reservoirs can be greatly improved by fractures, through which quality of reservoirs can be effectively enhanced. Concentration of CO2. temperature, and humidity are affected by changes in climate, which can have an influence on depositional setting, composition and diagenesis of sediments, and eventually the properties of reservoirs. The hot and arid climate of the Paleogene was harmful to development of reservoirs, which is demonstrated in the contemporaneous diagenetic and epigenetic stages. Shallow and deep-burial diagenesis are closely related to the formation and the connate water, however these are rarely affected by paleo-climatic variation. There is possible erosion that mainly resulted from organic acid in relative well intervals according to indications of hydrocarbons in the early diagenetic stage. Fracture systems can be established when acidic fluids are ernplaced during periods of uplift, by which pores can be effectively enlarged during the late diagenetic stages.

关键词： Kalatar Formation sedimentary facies diagenesis dolomitization fractures climaticconditions Tarirn Basin