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冲绳海槽中部Jade热液活动区中海底热液沉积物的硫同位素组成及其地质意义

海洋学报 2000年第4期22卷 74-82页

作者：曾志刚蒋富清翟世奎秦蕴珊侯增谦中国科学院海洋研究所青岛266071 中国地质科学院北京100037

测定了冲绳海槽中部Jade热液活动区中18个热液沉积物样品的硫同位素组式，其中10个硫化物样品的δ3.S值为5．2×10－3.7．2×10－3.7个硫酸盐样品的3.S值为16．3.10-3.22．3.10-3.1个自然硫样品的δ3.S值为8．2×10-3.液沉积物... 详细信息

测定了冲绳海槽中部Jade热液活动区中18个热液沉积物样品的硫同位素组式，其中10个硫化物样品的δ3.S值为5．2×10－3.7．2×10－3.7个硫酸盐样品的3.S值为16．3.10-3.22．3.10-3.1个自然硫样品的δ3.S值为8．2×10-3.液沉积物的硫主要来自中、酸性火山岩和海水，并且在流体与沉积物相互作用过程中海底沉积物也可能为热液沉积物的形成提供部分的硫．导致本区热液沉积物中硫化物与其他热液活动区的硫同位素组成不同的原因，主要是各热液活动区的硫源以及有关岩浆活动和构造演变的不同.海底热液体系中硫的演化是一个复杂的过程，涉及被加热海水的上升、流体与火山岩的相互作用、海水硫酸盐和中、酸性火山岩中流的混合作用以及流体与沉积物相互作周等一系列海底热液活动，其中海水和中、酸性火山岩的相互作用是本区硫演化的一个重要机制．

关键词：硫同位素海底热液沉积物 Jade热液活动区

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Directly determining 143.d/144Nd isotope ratios using thermal ionization mass spectrometry for geological samples without separation of Sm-Nd

Directly determining 143Nd/144Nd isotope ratios using therma...

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中国科学院地质与地球物理研究所第11届（2011年度）学术年会

作者： Chao-feng Li,~(*ab)Xian-hua Li,~aQiu-li Li,~aJing-hui Guo~a and Xiang-hui Li~a ~aState Key Laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,chinese academy of Sciences,beijing,100029,{3.. ~bSchool of Earth Sciences,Graduate University of chinese academy of Sciences,beijing,10003.,{3.

Sm-Nd isotopic system is a powerful tracer and dating tool in geochemistry and cosmochemistry. Thermal ionization mass spectrometry(TIMS) is the benchmark method for obtaining high precision Nd isotope ***,a two-step separation was employed in order to obtain high purity Nd fraction,which makes the sample preparation *** this study,we present a new method to directly obtain precise and accurate Nd isotope ratios of geological samples without Sm-Nd separation. The key point is to well correct isobaric interferences of Sm on Nd for this *** accurate intensity of Sm can be obtained using Sm/Sm ratio of 4.87090 and mass discrimination factor of Sm(β),which is achieved using Sm/Sm ratio of 1.08583.with Russell ***,the real intensity of Nd was achieved,then also raw Nd/Nd,Nd/Nd ***,Nd/Nd ratio is normalized using Nd/Nd ratio of 0.7219 following exponential *** accuracy of this method is validated by replicating TIMS measurements for thirteen international reference materials of silicate rock,spanning a wide range of Sm/Nd from 0.13.to 0.46 and bulk *** measured Nd/Nd ratios of the rock standards are in good agreement with the reported values of within error of±0.004%.Our new method shortens the analytical procedure and significantly improves sample throughput which greatly contributes to those studies requiring a large dataset and quick analysis.

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Rb－Sr isotope DATING ON FENITES FROM BAYANOBO，INNERMONGOLIA，chinaAND THEIR geologicalIMPLICATIONS

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Scientia Geologica Sinica 1994年第4期 457-467页

作者： Yang Xueming(Department of Earth and Space Sciences, china University of Science and Technology, Hefei 23.026) Zhang Peishan Tao Kejie Zhang Rengu(Institute of Geology, chinese academy of Sciences {3. 100029)Yang Xiaoyong(Department of Earth and Spa

Ｒｂ－ＳｒＩＳＯＴＯＰＥＤＡＴＩＮＧＯＮＦＥＮＩＴＥＳＦＲＯＭＢＡＹＡＮＯＢＯ，ＩＮＮＥＲＭＯＮＧＯＬＩＡ，ＣＨＩＮＡＡＮＤＴＨＥＩＲＧＥＯＬＯＧＩＣＡＬＩＭＰＬＩＣＡＴＩＯＮＳＹａｎｇＸｕｅｍｉｎｇ（Ｄｅｐａｒｔｍ... 详细信息

Ｒｂ－ＳｒＩＳＯＴＯＰＥＤＡＴＩＮＧＯＮＦＥＮＩＴＥＳＦＲＯＭＢＡＹＡＮＯＢＯ，ＩＮＮＥＲＭＯＮＧＯＬＩＡ，ＣＨＩＮＡＡＮＤＴＨＥＩＲＧＥＯＬＯＧＩＣＡＬＩＭＰＬＩＣＡＴＩＯＮＳＹａｎｇＸｕｅｍｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＥａｒｔｈａｎｄＳｐａｃ...

关键词： Rb INNERMONGOLIA chinaAND THEIR geologicalIMPLICATIONS Sr isotope DATING ON FENITES FROM BAYANOBO

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In situ Nd isotopic measurement of natural geological materials by LA-MC-ICPMS

In situ Nd isotopic measurement of natural geological materi...

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中国科学院地质与地球物理研究所2008学术年会

作者： YANG YueHeng,SUN JinFeng,XIE LieWen,FAN HongRui & WU FuYuan~+ State Key Laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,chinese academy of Sciences,beijing 100029,{3.

Using newly determined Sm isotopic abundances for correcting the isobaric interference of Sm on Nd and the established mass bias relationship between Sm and Nd,a series of in situ Nd isotopic measurements were conducted for relatively high Nd concentrations of natural geological materials, including apatite,titanite,monazite and perovskite on a Neptune multi-collector inductively coupled plasma mass spectrometry(MC-ICPMS),coupled to a 193.nm ArF excimer laser ablation *** results show that Ce has no significant influence on the precision and accuracy of Nd isotopic analyses for LREE-enriched geological minerals and that our approach is efficient in obtaining reliable Nd/Nd and Sm/Nd ratios for those materials with Sm/Ndisotope data,the in situ Nd isotopic data can provide important information on geological processes.

关键词： Nd isotope apatite titanite monazite perovskite LA-MC-ICPMS

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桂北九万大山—元宝山地区锡多金属矿床的地质特征和成矿系列

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矿床地质 1987年第4期 23-32页

作者：毛景文中国地质科学院矿床地质研究所

本文从成矿系列角度出发,讨论了桂北九万大山—元宝山地区锡多金属矿床的地质特征和控矿因素,总结了矿化作用在时间上的递变规律和矿床、矿体及元素在空间上的分布特点,并提出了该区的交代系列和交代建造,探讨了锡多金属矿床与其外围贱... 详细信息

本文从成矿系列角度出发,讨论了桂北九万大山—元宝山地区锡多金属矿床的地质特征和控矿因素,总结了矿化作用在时间上的递变规律和矿床、矿体及元素在空间上的分布特点,并提出了该区的交代系列和交代建造,探讨了锡多金属矿床与其外围贱金属矿床之间的联系,最后建立了与雪峰期黑云母花岗岩有关的多金属矿床成矿系列的成矿模式。

关键词：桂北九万人山一元宝山地区锡多金属矿床成矿系列交代系列矿化分带

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Calculation methods for direct internal mass fractionation correction of spiked isotopic ratios from multi-collector mass spectrometric measurements

Calculation methods for direct internal mass fractionation c...

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中国科学院地质与地球物理研究所第11届（2011年度）学术年会

作者： Zhu-yin Chu~*,Yue-heng Yang,Guo Jinghui,Guang-sheng Qiao State Key Laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,chinese academy of Sciences,beijing 100029,{3.

It is difficult to do internal mass fractionation corrections for isotope dilution analysis by thermal ionization mass spectrometry(TIMS) or multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS),especially for *** this study,calculation methods for direct internal fractionation correction of spiked isotope analysis by TIMS or MC-ICP-MS cycle by cycle for elements having at least two internal reference isotopic ratios are *** TIMS,direct internal mass fractionation correction calculation methods,based on both power and exponential laws,are derived;whereas for MC-ICP-MS,due to larger mass fractionation effects,only exponential law is *** calculation strategies can be applied for both static and multi-dynamic *** multi-dynamic measurements,the isotope fractionation effect,gain and cup efficiency effects of different collectors,as well as ion beam fluctuation effects are all simultaneously *** calculation methods were verified by Sr isotopic analyses of spiked NBS987 standard solutions by TIMS and Hf isotopic analyses of spiked {3. reference materials by *** addition,precise and accurate calibrations of isotopic ratios of the spikes,based on the calculation methods,are discussed.

关键词： Mass fractionation correction isotope dilution analysis TIMS MC-ICP-MS Calculation method

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The Spatial Database of Digital geological Map of china at 1:1M

The Spatial Database of Digital Geological Map of China at 1...

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第五届全国地质制图与GIS学术讨论会

作者： DING Xiaozhong~1 HAN Kunying~(1,2) KE Xue~1 JU Yuanjing~1 PANG Jianfeng~1 1,Institute of Geology,chinese academy Geology Science,beijing {3.,china. 2,Faculty of Geosciences and Resources,china University of Geosciences,beijing 100083. china.

＜正＞The Spatial Database of the Digital geological Map of china at 1:1 M（V1.0）is made up of 64（whole and partial）map sheets,Each map sheet is represented by the rectangle of 6°longitude and 4°latitude,according to the international map standard at 1:1M,It mainly includes geological map database,geographical map database,metadata database et al,The geological map database is constructed on the basis of the 1:500 000 geological map database（1999）,and it absorbs the latest information and outcomes of 1:250 000,1:50000 geological mapping and special subject study,It contains strata,igneous rock,fault,special geological unit（eclogite, blueschist,ophiolite et al.）,isotope age determination and drill hole et al,According to the feature and requirement of the geological map database,the geographical map database was constructed on the basis of 1:1 M topographical map database（ArcInfo） which provided by National Geomatics Center of china,It contains boundaries,river system,inhabitant areas,transportation et al,The Spatial Database of Digital geological Map of china at 1:1M was built with MapGIS,ArcGIS and Access,The quantity of data is as large as 2.0GB,The spatial database management system possesses functions of map retrieval andquery,automatic map making and automatic legend drawing,The database system will serve on the network in the future,which should be updated and maintained regularly.

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Review of the Lithium isotope System as a Geochemical Tracer

Review of the Lithium Isotope System as a Geochemical Tracer

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中国科学院地质与地球物理研究所2006学术年会

作者： Yan-Jie Tang,Hong-Fu Zhang and Ji-Feng Ying State Key Laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,chinese academy of Sciences,P.O.Box 9825,beijing 100029,{3.

Li isotopes have many advantageous characteristics as geochemical tracer for a wide range of geological processes,covering fluid/melt-mineral interactions from the Earth’s surface to the *** latest developments in Li isotope geochemistry,in terms of measuring techniques, major geochemical reservoirs,the behaviors during the near-surface weathering and crust/mantle cycling of materials in subducting zone,as well as the signature of convective mantle and controlling factors in Li isotopic fractionation are briefly reviewed in this *** better quantification of partition coefficients(mineral-melt/fiuid) and fractionation factors of Li isotopes (such as temperature and diffusion coefficients),Li isotope system will be a powerful geochemical tracer in future studies.

关键词： Lithium isotope review geochemical tracer

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Review of the Lithium isotope System as a Geochemical Tracer

Review of the Lithium Isotope System as a Geochemical Tracer

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中国科学院地质与地球物理研究所2007学术年会

作者： Yan-Jie Tang,~1 Hong-Fu Zhang,and Ji-Feng Ying State Key Laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,chinese academy of Sciences, P.O.Box 9825,beijing 100029,{3.

Lithium isotopes have many advantageous characteristics as geochemical tracers for a wide range of geological processes,covering fluid/melt-mineral interactions from the Earth’s surface to the *** latest developments in Li isotope geochemistry,in terms of measuring techniques, major geochemical reservoirs,the contrasting behaviors during near-surface weathering,and crust/ mantle cycling of materials in subduction zones,as well as the signature of convective mantle,and controlling factors in Li isotopic fractionation are briefly reviewed in this *** better quantification of partition coefficients(mineral-melt/fluid) and fractionation factors(such as temperature and diffusion coefficients),the Li isotope system will become a powerful geochemical tracer in future studies.

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Empirical relationship between leaf wax n-alkaneδD and altitude in the Wuyi,Shennongjia and Tianshan Mountains,china:Implications for paleoaltimetry

Empirical relationship between leaf wax n-alkaneδD and alti...

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中国科学院地质与地球物理研究所第11届（2011年度）学术年会

作者： Pan Luo~(a,*),Ping’an Peng~b,Gerd Gleixner~c,Zhuo Zheng~d,Zhonghe Pang~a,Zhongli Ding~a a Key Laboratory of Cenozoic Geology and Environment,Institute of Geology and Geophysics,chinese academy of Sciences,beijing 100029,{3. b Guangzhou Institute of Geochemistry,chinese academy of Sciences,Guangzhou 510640,{3. c Max Planck Institute for Biogeochemistry,Jena 07745,Germany d Department of Earth Sciences,Sun Yat-sen University,Guangzhou 510275,{3.

Estimating past elevation not only provides evidence for vertical movements of the Earth’s lithosphere,but also increases our understanding of interactions between tectonics,relief and climate in geological history. Development of biomarker hydrogen isotope-based paleoaltimetry techniques that can be applied to a wide range of sample types is therefore of continuing *** we present leaf wax-derived n-alkane 8D (δD) values along three soil altitudinal transects,at different latitudes,in the Wuyi,Shennongjia and Tianshan Mountains in china,to investigateδD gradients and the apparent fractionation between leaf wax and precipitation(ε). We find that soilδD track altitudinal variations of precipitation 8D along the three transects that span variable environment conditions and vertical vegetation *** empiricalδD-altitude relation is therefore established in which the averageδD lapse rate of - 2.27±0.3.‰/100 m is suitable for predicting relative paleoelevation change(relative uplift).The application of this empirical gradient is restricted to phases in the mountain uplift stage when the atmospheric circulation had not distinctly changed and to when the climate was not *** empiricalδD-latitude-altitude formula is also calculated:δD = 3.483.AT - 0.0227ALT - 261.5, which gives the preliminary spatial distribution pattern ofδD in modern china. Mean value ofε in the extreme humid Wuyi Mountains is quite negative(-154‰),compared to the humid Shennongjia(-12.‰) and the arid(but with abundant summer precipitation) Tianshan Mountains(- 13.‰), which suggests aridity or water availability in the growing season is the primary factor controlling soil/ sedimentε.Along the Tianshan transects,values ofε are speculated to be constant with altitude;while along the Wuyi and Shennongjia transects,ε are also constant at the low-mid altitudes,but become slightly more negative at high altitudes which could be attributed to overestimates of precipitation 8D or the vegetation

关键词： leaf wax n-alkane deuterium/hydrogen isotopic ratio inverse altitude effect paleoelevation paleoaltimetry

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