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The Characteristics and Mechanism of Island-Arc Volcanism on the Central and Southern Fildes Peninsula, King George Island, Antarctica

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Acta Geologica Sinica(English Edition) 1992年第1期66卷 39-57页

作者： Li Zhaonai Liu Xiaohan Shang Ruxiang Fei Zhenbi Institute of Geology chinese Academy of geological Science.Institute of Geology,Academia Sinica. 1Institute of Geology Chinese Academy of Geological Science. 2.nstitute of Geology Academia Sinica.

The volcanic rock series on the Fildes Peninsula is the product of the later subduction of the Pacific platebeneath the Antarctic plate. It consists mainly of basalt, basaltic andesite and andesite with minor dacite. Itsisotopic ages range from 64.6±1 to 43.2.Ma, belonging to Palaeocene to Eocene. Volcanism in the area maybe divided into two phases. The contents of major oxides, rare earth elements (REE) and trace elements in vol-canic rocks formed in different phases show regular changes, which are mainly related to the rock associationsof these phases. Isotope geochemical studies indicate that the primitive magma in the area originating by par-tial melting in the upper mantle underwent fractional crystallization and ascended to the high-level (shallow)magma chamber. Before eruption the primitive basalt-andesitic magma was subjected to differentiation in thehigh-level magma chamber, forming zones of derivative magmas of different compositions. In various phasesmagma-conducting faults experienced periodic extension and cut through various derivative magma zones indifferent parts of the peninsula, leading to the eruption of magmas of different compositions on the surface andthe formation of volcanic rock associations of corresponding compositions.

关键词： rock Antarctica The Characteristics and Mechanism of Island-Arc Volcanism on the Central and Southern Fildes Peninsula Arc

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地下水矿化度检测的地球物理方法

水文地质工程地质 2003年第6期30卷 33-36页

作者：王赟赵发展蔡纲田小红励宝恒中国科学院地质与地球物理研究所北京100101 中国地质调查局发展研究中心北京100083 中国石油股份公司大港油田分公司油气勘探开发技术研究中心天津300280

传统的水文地质研究方法在进行地下水水质评价时,是通过地下水的取样进行分析化验,确定含水岩组中水的矿化度。目前,在利用已有的地质、地球物理资料进行西部地下水资源评价的研究中,鉴于大多数石油井中没有浅层地下水的水样化验资料,... 详细信息

传统的水文地质研究方法在进行地下水水质评价时,是通过地下水的取样进行分析化验,确定含水岩组中水的矿化度。目前,在利用已有的地质、地球物理资料进行西部地下水资源评价的研究中,鉴于大多数石油井中没有浅层地下水的水样化验资料,本文介绍一种利用石油测井数据计算地下水矿化度的方法,并将之应用于鄂尔多斯白垩系自流水盆地地下水矿化度估算。应用实例证明这种方法是较为可靠的,虽然存在一定的误差,但基本可以满足地下水矿化度分级评价的要求,从而开发了石油测井数据在水文地质中的应用,减少了地下水水质评价的资金投入,同时提高了矿化度预测的精度。

关键词：地下水矿化度检测地球物理方法水质自然电位电阻率

Baogutu Porphyry Cu-Mo-Au Deposit,West Junggar,Northwest china Petrology,Alteration,and mineralization

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Baogutu Porphyry Cu-Mo-Au Deposit,West Junggar,Northwest Chi...

Heat flow study at the chinese Continental Scientific Drilling site:Borehole temperature,thermal conductivity,and radiogenic heat production

中国科学院地质与地球物理研究所第十届(2.10年度)学术年会

作者： PING SHEN,~(1,+) YUANCHAO SHEN,~1 HONGDI PAN,~2.JINGBIN WANG,~(1,3. RUI ZHANG,~4 AND YUNXIAO ZHANG~4 1 Key Laboratory of mineral Resources,Institute of Geology and Geophysics,chinese Academy of Sciences, P.O.Box 982.,Beijing 10002.,{2. 2.College of Earth Sciences,Chang’an University,Xi’an 710054,{2. 3.2. Nonferrous Metals Resource geological Survey,Beijing 100012.{2. 4 Institute of Geology,Xinjiang Geoexploration Bureau for Nonferrous Metals,Urumqi 83.000,{2.

Baogutu is the first porphyry Cu-Mo-Au deposit discovered in West Junggar,Xinjiang,*** is part of the Central Asian orogenic *** is associated with a Carboniferous intrusive complex that was em-placed into lower Carboniferous volcano-sedimentary sequences of the Baogutu and Xibeikulasi *** intrusive complex is made up of main stage equigranular to porphyritic diorites and quartz diorites,and minor late stage diorite *** activity occurred at about 3.0} Ma based on U-Pb(SHBIMP) analyses of zircons. The main stage diorites host the bulk of the Cu-Mo-Au mineralization at *** have been overprinted by three alteration assemblages,including an early potassic(biotite) assemblage that occurs in the center of the deposit.A propylitic assemblage surrounds the potassic zone *** of these alteration assemblages have been overprinted locally by phyllic alteration(quartz-sericite-pyrite),which is associated with the highest Cu-Mo *** and hydrothermally cemented breccias have disrupted the main stage *** late stage diorites have undergone moderate potassic alteration and contain weak Cu mineralization. Matrix-rich breccias with very weak mineralization have cut the intrusive complex and disrupted the orebody Re-Os dating of molybdenite indicates that mineralization occurred at about 3.0 Ma.

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Heat flow study at the Chinese Continental Scientific Drilli...

Developmental modes of the Neoproterozoic-Lower Paleozoic marine hydrocarbon source rocks in china

中国科学院地质与地球物理研究所2.08学术年会

作者： Lijuan He,Shengbiao Hu,Shaopeng Huang,Wencai Yang,Jiyang Wang, Yusong Yuan,and Shuchun Yang 1 Institute of Geology and Geophysics,chinese Academy of Sciences, Beijing,china. 2.Department of {2. Sciences,University of Michigan,Ann Arbor,Michigan,USA. 3.Institute of Geology,chinese Academy of {2. Sciences, Beijing,china.

[1]The chinese Continental Scientific Drilling(CCSD) Project offers a unique opportunity for studying the thermal regime of the Dabie-Sulu ultrahigh-pressure metamorphic *** this paper,we report measurements of borehole temperature,thermal conductivity,and radiogenic heat production from the 5158 m deep main hole (CCSD MH).We have obtained six continuous temperature profiles from this borehole so *** temperature logs show a transient mean thermal gradient that has increased from 2..3. to 2..2. K km over a period of about 1.5 *** measured thermal conductivities and radiogenic heat productions on more than 400 core samples from CCSD *** measured thermal conductivities range between 1.71 and 3.60 W m K,and the radiogenic heat productions vary from 0.01μW m to over 5.0μW m, with a mean value of 1.2.±0.82.W m for the upper 5-km layer of the crust. The heat productions in CCSD MH appear to be more rock-type than depth-dependent and,over the depth range of CCSD MH,do not fit the popular model of heat production decreasing exponentially with increasing *** measured heat flow decreases with depth from～75 mW m near the surface to～66 mW m at a depth of 4600 m. High heat flow anomalies occur at～1000 and～2.00 m,and low anomalies occur at 3.00-4000 m.A preliminary two-dimensional numerical model suggests that both radiogenic heat production and thermal refraction due to structural heterogeneity are at least partially responsible for the vertical variation of heat flow in CCSD MH.

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Science Bulletin 2007年第S1期 77-91页

作者： ZHANG BaoMin1, ZHANG ShuiChang1, BIAN LiZeng2. JIN ZhiJun3.& WANG DaRui1 1 Research center of Petroleum Geology in Research Institute of Petroleum Exploration and Development, Petrochina, Beijing 100083.{2. 2.Department of Earth Sciences, Nanjing University, Nanjing 2.0093.{2. 3.Research Institute of Petroleum Exploration and Development, Sinopec, Beijing 100083.{2.

Based on the researches on rock type, the mode of occurrence, diagnostic minerals and creatures, the sedimentary geochemistry and organic facies of {2. marine source rocks from wells and outcrops, and on the research findings of developmental modes of foreign marine source rock, the authors consider that it is impossible to objectively make clear the formation mechanism of hydrocarbon source rock with high organic matter abundance by either single mode of preservation or high organic matter productivity. According to the {2. geological features, the formation mechanism of the Neoproterozoic-Lower Paleozoic marine source rock is generalized into four modes, namely, thermal water activity-upwelling flow-anoxic; carbonate gentle slope-upwelling flow; xerothermic climate-brine euxinic milieu; and humid climate-retained euxinic milieu; as the Lower Cambrian undercompensation basin organic facies (the Tarim Basin, South china and southwestern margin of North china), carbonate gentle lime mud bound organic facies (the Upper Ordovician in Tazhong region of the Tarim Basin and the Lower Silurian in the Upper Yangtze Platform), the Middle Cambrian evaporation laggon organic facies (the Tarim Basin and the Upper Yangtze Platform), enclosed undercompensation terrigenous bay organic facies (the Middle-Upper Ordovician in the west of the Tarim Basin, the Lower Silurian Longmaxi Formation in the Upper Yangtze platform). {2. marine sedimentations with lower organic matter abundance are generalized into two modes of consumption-dilution mode of open epicontinental sea and depletion-dilution mode of supercompensation basin.

关键词： marine source rock upwelling flow anoxic event thermal water activity xerothermic climate-brine euxinic humid climate-retained euxinic

Petrology of the Non-mafic UHP Metamorphic rocks from a Drillhole in the Southern Sulu Orogenic Belt,Eastern-Central china

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Acta Geologica Sinica(English Edition) 2003年第2期77卷 173-186页

作者： ZHANG Zeming, XU Zhiqin and XU HuifenInstitute of Geology, chinese Academy of geological Sciences, 2. Baiwanzhuang Rd., Beijing {2. E-mail: zzm@***. Institute of Geology Chinese Academy of Geological Sciences 26 Baiwanzhuang Rd. Beijing 100037

The Drillhole ZK703.with a depth of 558 m is located in the Donghai area of the southern Sulu ultrahigh-pressure (UHP) metamorphic belt, eastern china, and penetrates typical UHP eclogites and various non-mafic rocks, including peridotite, gneiss, schist and quartzite. Their protoliths include ultramafic, mafic, intermediate, intermediate-acidic, acidic igneous rocks and sediments. These rocks are intimately interlayered, which are meters to millimeters thick with sharp and nontectonic contacts, suggesting in-situ metamorphism under UHP eclogite facies conditions. The following petrologic features indicate that the non-mafic rocks have experienced early-stage UHP metamorphism together with the eclogites: (1) phengite relics in gneisses and schists contain a high content of Si, up to 3.52.p.f.u. (per formula unit), while amphibolite-facies phengites have considerably low Si content (3.2. p.f.u.); (2. jadeite relics are found in quartzite and jadeitite; (3. various types of symplectitic coronas and pseud

关键词： UHP metamorphism non-mafic rock drillhole Dabie-Sulu orogenic belt eastern-central china

Magnetic polarity ages of the fossil-bearing strata at the Sihetun section,West Liaoning:A preliminary result

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Magnetic polarity ages of the fossil-bearing strata at the S...

EXPERIMENTAL STUDY OF WATER-rock HYDROGEN AND OXYGEN ISOTOPE EXCHANGE IN XIANGSHAN URANIUM ORE-FIELD

中国科学院地质与地球物理研究所2.01学术年会

作者： PAN Yongxin~1,ZHU Rixiang~1,John Shaw~2.& ZHOU Yaoxiu~3.1.Institute of Geology and Geophysics,chinese Academy of Sciences, Beijing 100101,china 2.Geomagnetism Laboratory,University of Liverpool,Liverpool L69 7ZE,UK 3.The Aviatic Remote Sensing {2.,Ministry of Land and Resources, Beijing 100083.china

rock-magnetic and palaeomagnetic studies have been carried out on the interval of famous fossil -bearing sedimentary rocks and its overlying basalts and underlying basalts at the Sihetun section,West Liaoning *** polarity was obtained for the sedimentary interval and the underlying basalts,while reversed polarity was found in the overlying *** account of the new Ar/(3.)Ar ages(Swisher et al.,1999),we classified the fossil-bearing sedimentary interval into the Barremian M3. zone(Early Cretaceous age).Several abnormal horizons on magnetic properties,probably corresponding to the tuffs, were observed in the fossil-bearing sedimentary interval. This implies that the massive bio-extinction may link to dramatic environmental changes that were caused by volcanic eruptions.

关键词： magnetic polarity age Jehol fauna Sihetun section

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Scientia Geologica Sinica 1997年第2期 26-30页

作者： Zhou Wenbin(East china geological Institute, Linchuan, Jiangxi, 3.4000)Rao Bin({2. Key Lab on {3. Deposit Research, Nanjing University, Nanjing, 2.0093.)

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ＥＸＰＥＲＩＭＥＮＴＡＬＳＴＵＤＹＯＦＷＡＴＥＲ－ＲＯＣＫＨＹＤＲＯＧＥＮＡＤＯＸＹＧＥＮＩＳＯＴＯＰＥＥＸＣＨＡＮＧＥＩＮＸＩＡＮＧＳＨＡＮＵＲＡＮＩＵＭＯＲＥ－ＦＩＥＬＤTXＥＸＰＥＲＩＭＥＮＴＡＬＳＴＵＤＹＯＦＷＡＴＥＲＲＯＣＫＨＹＤＲＯＧＥＮ...

关键词： WATER-rock HYDROGEN OF STUDY AND ORE-FIELD

Shear Alteration, Mass Transfer and Gold mineralization: An Example from Jiaodong Ore Deposit Concentrating Area, Shandong, china

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Journal of Earth Science 2000年第3期19卷 87-93页

作者： Deng Jun Zhai Yusheng Wang Jianping Faculty of Earth Sciences and mineral Resources, china University of Geosciences, Beijing 100083. china Yang Liqiang Institute of Geophysics, {3. Academy of Sciences, Beijing 100101, china Fang Yun Faculty of

Taking the gold ore deposit concentrating area of Jiaodong area in Shandong, china for an example, based on geological {2., and applying Gresens’ equation, Grant’s isocon diagram and O’hara microelement calculation method, a thorough study on shear alteration, mass transfer and gold {3.ization was carried out. The authors also made mathematic simulation and geochemical {2.. The work reveals temporal spatial changing regularities of temperature field and velocity field of fluids, and also reveals fluid transport chemical reaction coupling metallogenic dynamics of the Jiaojia gold ore concentrating area. During shear alteration process of the Jiaodong gold ore concentrating area, all kinds of components transferred with different amounts, fluid rock ratio was rather high and volume strain was of dilation type. Fast flow of ore forming fluid favors the occurrence of mixed fluid. Shear fractured zones are places where there was strong transportation reaction coupling {3.ization. Ore bodies were located in dilation space of shear structure where there was the greatest fluid flux. After the emplacement of the rock body, a convex heat field was formed around the rock body. It is one of the main metallogenic forces. The major reason for {3.ization is the mobilization, migration and enrichment of ore forming elements induced by shear compressive extensional tectonism. Inclusion gold dominant low grade ores were formed in the early ore forming stage, while high grade ores, which contained fissure gold and polymetallic veinlets, were formed in late ore forming stage.

关键词： shear alteration mass transfer transportation reaction coupling ore forming process.