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S, C, O, H Isotope Data and Noble Gas Studies of the Maoniuping LREE Deposit, Sichuan Province, China: A Mantle Connection for Mineralization

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Acta Geologica Sinica(English Edition) 2006年第4期80卷 540-549页

作者： TIAN Shihong ding tiping MAO Jingwen LI Yanhe YUAN Zhongxin Institute of Mineral Resources Chinese Academy of Geological Sciences Beijing 100037 Key Laboratory of Isotope Geology Ministry of Land and Resources Beifing 100037 China University of Geosciences Beijing 100083

The Maoniuping REE deposit, located about 22 km to the southwest of Mianning, Sichuan Province, is the second largest light REE deposit in China, subsequent to the Bayan Obo Fe-Nb-REE deposit in the Inner Mongolia Autonomous Region. Tectonically, it is located in the transitional zone between the Panxi rift and the Longmenshan-Jinpingshan orogenic zone. It is a carbonatite vein-type deposit hosted in alkaline complex rocks. The bastnaesite-barite, bastnaesite-calcite, and bastnaesite- microcline lodes are the main three types of REE ore lodes. Among these, the first lode is distributed most extensively and its REE mineralization is the strongest. The δ^*** values of the barites in the ore of the deposit vary in a narrow range of ＋5.0 to ＋5.1‰ in the bastnaesite-calcite lode and ＋3.3 to ＋5.9‰ in the bastnaesite-barite lode, showing the isotopic characteristics of magma-derived sulfur. The δ^13Cv-PDB values and the δ^*** values in the bastnaesite-calcite lode range from -3.9 to -6.9‰ and from ＋7.3 to ＋9.7 ‰, respectively, which fall into the range of ＂primary carbonatltes＂, showing that carbon and oxygen in the ores of the Maoniuping deposit were derived mainly from a deep source. The δ^*** values of fluid inclusions vary from -3.0 to -5.6‰, with -3.0 to -4.0‰ in the bastnaesitecalcite lode and -3.0 to -5.6‰ in the bastnaesite-barite lode, which show characteristics of mantle- derived carbon. The δDv-SMOW values of fluid inclusions range from -57 to -88‰, with -63 to -86‰ in the bastnaesite-calcite lode and -57 to -88‰ in the bastnaesite-barite lode, which show characteristics of mantle-derived hydrogen. The δ^*** values vary from ＋7.4 to ＋8.6‰ in the bastnaesitecalcite lode, and ＋6.7 to ＋7.8‰ in the bastnaesite-barite lode, almost overlapping the range of ＋5.5 to ＋9.5‰ for magmatic water. The 4He content, R/Ra ratios are （13.95 to 119.58）×10^-6 （cm^3/g）STP and 0.02 to 0.11, respectively, and ^40Ar/^36Ar is 313± 1 to 437 ± 2. Considering the 4He

关键词： stable isotopes noble gas mantle source Maoniuping LREE deposit Sichuan Province

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Chemical and Isotopic Characters of the Water and Suspended Particulate Materials in the Yellow River and Their Geological and Environmental Implications

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Acta Geologica Sinica(English Edition) 2016年第1期90卷 285-351页

作者： ding tiping GAO Jianfei TIAN Shihong WANG Huaibai LI Ming WANG Chengyu LUO Xurong HANG Dan MLR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral ResourcesCAGSBeijing 100037China MLR Key Laboratory of Isotope Geology CAGSBeijing 100037China Hydrological Bureau YRCCZhengzhou 450004China

The chemical and isotopic characteristics of the water and suspended particulate materials （SPM） in the Yellow River were investigated on the samples collected from 29 hydrological monitoring stations in the mainstem and several major tributaries during 2004 to 2007. The JD and δ^18O values of the Yellow River water vary in large ranges from -32%0 to -91‰ and from -3.1‰ to -12.5‰, respectively. The characters of H and O isotope variations indicate that the major sources of the Yellow River water are meteoric water and snow melting water, and water cycle in the Yellow River basin is affected strongly by evaporation process and human activity. The average SPM content （9.635 g/L） of the Yellow River is the highest among the world large rivers. Compared with the Yangtze River, the Yellow River SPM has much lower clay content and significantly higher contents of clastic silicates and carbonates. In comparison to the upper crust rocks, the Yellow River SPM contains less SiO2, CaO, K2O and Na2O, but more TFe203, Co, Ni, Cu, Zn, Pb and Cd. The abnormal high Cd contents found in some sample may be related to local industrial activity. The REE contents and distribution pattern of the Yellow River SPM are very close to the average value of the global shale. The average δ^30Sisp in the Yellow River （-0.11‰） is slightly higher than the average value （-0.22‰） of the Yangtze River SPM. The major factors controlling the δ^30Si SPM of the Yellow River are the soil supply, the isotopic composition of the soil and the climate conditions. The TDS in the Yellow River are the highest among those of world large rivers. Fair correlations are observed among Cl, Na^＋, K^＋, and Mg^2＋ contents of the Yellow River water, indicating the effect of evaporation. The Ca^2＋ and Sr^2＋ concentrations show good correlation to the SO42 concentration rather than HCO3-concentration, reflecting its origin from evaporates. The NO3-contents are affected by farmland fertilization. The Cu, Zn and Cd contents in

关键词： Yellow River stable isotopes water chemistry suspended particulate materials (SPM) hydrology environmental implication

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Chemical and Isotopic Characteristics of the Water and Suspended Particulate Materials in the Yangtze River and Their Geological and Environmental Implications

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Acta Geologica Sinica(English Edition) 2014年第1期88卷 276-360页

作者： ding tiping GAO Jianfei TIAN Shihong SHI Guoyu CHEN Feng WANG Chengyu LUO Xurong HAN Dan MLR Key Laboratory of Metallogeny and Mineral Assessment Institute of Mineral Resources CAGS Open Research Laboratory of Isotope Geology Hydrological Bureau CWRC

The chemical and isotopic characteristics of the water and suspended particulate materials（SPM） in the Yangtze River were investigated on the samples collected from 25 hydrological monitoring stations in the mainsteam and 13 hydrological monitoring stations in the major tributaries during 2003 to 2007. The water samples show a large variation in both δD（ 30‰ to 112‰） and δ18O（ 3.8‰ to 15.4‰） values. Both δD and δ18O values show a decrease from the river head to the Jinsha Jiang section and then increase downstream to the river mouth. It is found that the oxygen and hydrogen isotopic compositions of the Yangtze water are controlled by meteoric precipitation, evaporation, ice（and snow） melting and dam building. The Yangtze SPM concentrations show a large variation and are well corresponded to the spatial and temporal changes of flow speed, runoff and SPM supply, which are affected by the slope of the river bed, local precipitation rate, weathering intensity, erosion condition and anthropogenic activity. The Yangtze SPM consists of clay minerals, clastic silicate and carbonate minerals, heavy minerals, iron hydroxide and organic compounds. From the upper to lower reaches, the clay and clastic silicate components in SPM increase gradually, but the carbonate components decrease gradually, which may reflect changes of climate and weathering intensity in the drainage area. Compared to those of the upper crust rocks, the Yangtze SPM has lower contents of SiO2, CaO, K2 O and Na2 O and higher contents of TFe2 O3 and trace metals of Co, Ni, Cu, Zn, Pb and Cd. The ΣREE in the Yangtze SPM is also slightly higher than that of the upper crust. From the upper to lower reaches, the CaO and MgO contents in SPM decrease gradually, but the SiO2 content increases gradually, corresponding to the increase of clay minerals and decrease of the carbonates. The δ30SiSPM values（ 1.1‰ to 0.3‰） of the Yangtze SPM are similar to those of the average shale, but lower than those of the granite rock

关键词： Yangtze River stable isotopes water chemistry Suspended Particulate Materials(SPM) hydrology environmental implication

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Quartz-Ferberite Oxygen Isotope Geothermometer and Its Geological Applications

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Acta Geologica Sinica(English Edition) 1992年第3期66卷 271-281页

作者： ding tiping Liu Yushan Wan Defang Liu Zhijian Li Jincheng Zhang Guilan Institute of Mineral Deposits, Chinese Academy of Geological Sciences, Beijing Institute of Mineral Deposits Chinese Academy of Geological Sciences Beijing

Experiments for oxygen isotope exchange between ferberite and water were carried out and the followingequation on oxygen isotope fractionation between ferberite and water against temperature was obtained:Combining this equation with the equation of Clayton et al. (1972) on oxygen isotope fractionation be-tween quartz and water, an equation on oxygen isotope fractionation between quartz and ferberite was ob-tained:The Bigeleison-Mayer function method was used to calculate the oxygen isotope fractionation betweenquartz and ferberite. The theoretical curve obtained agrees with the experimental calibration results quite wellin the temperature range of *** above calibrated equation has been used in 5 world famous tungsten deposits to determine their tem-peratures of formation. The results show that the temperature range for an idividual deposit determined by thisgeothermometer agrees with those obtained from fluid inclusion determination and other isotopegeothermometers.

关键词： geothermometer oxygen isotope quartz--ferberite

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An Experimental Calibration on the Sphalerite-Galena Sulfur Isotope Geothermometer

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Acta Geologica Sinica(English Edition) 2003年第4期77卷 519-521页

作者： ding tiping, ZHANG Chengxin, WAN Defang, LIU Zhijian and ZHANG Guilan Institute of Mineral Resources, Chinese Academy of Geological Sciences, 26 Baiwanzhuang Rd.,Beijing 100037 Institute of Mineral Resources Chinese Academy of Geological Sciences 26 Baiwanzhuang Rd. Beijing 100037

A new experimental calibration was undertaken in this study to get a more reliable sphalerite-galena sulfur isotope geothermometer. The experimental conditions selected in study were very similar to those of natural hydrothermal solution. The high-precision SF6 method was used in sulfur isotope analyses. The obtained calibration curve for sulfur isotope fractionation between sphalerite and galena can be expressed with the equation 10001nαSp-Gn= 0.74×106T-2+0.08.

关键词： sulfur isotopes isotope geothermometer SF6 method sphalerite galena

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激光熔蚀微量氧同位素分析方法及其地质应用

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地质论评 2008年第1期54卷 139-144页

作者：高建飞丁悌平中国地质科学院矿产资源研究所北京100037

研究小尺度或微区的同位素组成变化已成为地球化学分析技术发展的重要方向之一。在研制CO2激光熔蚀氧同位素制样装置的基础上,通过该装置与MAT-253质谱计联机实现了硅酸盐和氧化物矿物的氧同位素在线分析。所测样品包括NBS-28石英标样... 详细信息

研究小尺度或微区的同位素组成变化已成为地球化学分析技术发展的重要方向之一。在研制CO2激光熔蚀氧同位素制样装置的基础上,通过该装置与MAT-253质谱计联机实现了硅酸盐和氧化物矿物的氧同位素在线分析。所测样品包括NBS-28石英标样、石英玻璃,以及天然的石榴子石、锆石、橄榄石等一些难熔矿物。该装置分析的颗粒样品氧同位素分析精度为±0.22‰,最低样品量为8μmol的O2;石英玻璃原位分析的氧同位素分析精度为±0.35‰,最低样品量为7μmol的O2。这种装置和分析方法具备速度快,熔样温度高的特点,尤其适于难熔矿物。该装置可采用脉冲激光实现石英玻璃的微区原位分析,可应用于单个矿物生成环带的氧同位素研究。

关键词：激光熔蚀 BrF5法氧同位素分析硅酸盐和氧化物

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福建云霄晶洞花岗岩及含石榴子石伟晶岩的硅氧同位素研究

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地质论评 2011年第5期57卷 670-674页

作者：高建飞丁悌平中国地质科学院矿产资源研究所北京100037 国土资源部成矿作用与资源评价重点实验室北京100037

在运用常规方法和激光烧蚀同位素分析方法分别对云霄晶洞花岗岩和伟晶岩(长石、石英和石榴子石)的硅、氧同位素组成进行研究的基础上,探讨了晶洞花岗岩及其含石榴子石伟晶岩的物质来源及形成条件。伟晶岩中的石英和长石的氧、硅同位素... 详细信息

在运用常规方法和激光烧蚀同位素分析方法分别对云霄晶洞花岗岩和伟晶岩(长石、石英和石榴子石)的硅、氧同位素组成进行研究的基础上,探讨了晶洞花岗岩及其含石榴子石伟晶岩的物质来源及形成条件。伟晶岩中的石英和长石的氧、硅同位素组成分别较之花岗岩中的石英和长石的氧、硅同位素组成,均未发生明显变化,表明二者岩浆来源一致。云霄县的乌山岩体主要由燕山期铝质A型花岗岩构成,实验得到的云霄晶洞花岗岩样品全岩的氧同位素组成符合A型花岗岩氧同位素组成特点。根据花岗岩中石英与长石矿物对的氧同位素分馏公式计算得到的温度为461℃,可能反映花岗岩结晶后曾受到水—岩交换作用的影响,这也与岩体中广泛发育伟晶岩晶洞的现象相一致。依据伟晶岩中石英—长石、石英—石榴子石矿物对的氧同位素分馏公式计算得到的温度分别为505℃、532℃,表明形成伟晶岩的流体温度达到500℃以上,高于前人得出的温度范围。伟晶岩中石榴子石硅、氧同位素比值均显著低于与其共生的石英和长石硅、氧同位素比值,表明石英与石榴子石之间、长石与石榴子石之间存在明显的硅、氧同位素分馏,且二者分馏趋势相一致,但其硅同位素分馏程度小于氧同位素分馏。

关键词：晶洞花岗岩伟晶岩硅氧同位素分析长石石英石榴子石

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四川牦牛坪轻稀土矿床地幔流体特征——铅锶钕和氦氩同位素及稀土元素证据

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地质学报 2006年第7期80卷 1035-1044页

作者：田世洪丁悌平袁忠信中国地质科学院矿产资源研究所

四川牦牛坪稀土矿床是中国第二大轻稀土矿床。笔者对该矿床进行了较系统的Pb—Sr—Nd同位素、稀有气体同位素地球化学以及稀土元素地球化学研究。稀土元素地球化学特征研究显示,矿区萤石、方解石、氟碳铈矿稀土元素分布模式与区内英碱... 详细信息

四川牦牛坪稀土矿床是中国第二大轻稀土矿床。笔者对该矿床进行了较系统的Pb—Sr—Nd同位素、稀有气体同位素地球化学以及稀土元素地球化学研究。稀土元素地球化学特征研究显示,矿区萤石、方解石、氟碳铈矿稀土元素分布模式与区内英碱正长岩相似,表明牦牛坪稀土矿床成矿与英碱正长岩岩浆活动有关以及石英包裹体流体REE曲线平直,Eu与Ce无明显异常,曲线规律性较强,可以认为牦牛坪轻稀土矿床成矿流体稀土元素是深源的。Pb—Sr—Nd同位素组成表明成矿物质来自富集地幔,具深源甚至幔源特征。稀有气体同位素地球化学研究也在一定程度上揭示了牦牛坪轻稀土矿化与地幔过程之间存在着成因关系。

关键词： Pb-Sr-Nd同位素稀有气体同位素稀土元素地幔流体轻稀土矿床四川牦牛坪

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大别山超高压变质榴辉岩的氦同位素组成及对其形成环境的制约

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地质论评 2005年第3期51卷 243-249页

作者：李善芳李延河丁悌平伍宗华古平等中国地质调查局发展研究中心北京100037 中国地质科学院矿产资源研究所北京100037 国土资源部同位素地质重点实验室北京100037

大别山地区榴辉岩全岩的3He/4 He值分布在0 .0 13×10 - 6 ～0 .76 0×10 - 6 之间,平均0 .2 0 0×10 - 6 ,榴辉岩中石榴子石单矿物的3He/4 He值与其全岩的3He/4 He值基本一致。在3He—4 He分布图上榴辉岩的氦同位素数据点远离地幔氦的... 详细信息

大别山地区榴辉岩全岩的3He/4 He值分布在0 .0 13×10 - 6 ～0 .76 0×10 - 6 之间,平均0 .2 0 0×10 - 6 ,榴辉岩中石榴子石单矿物的3He/4 He值与其全岩的3He/4 He值基本一致。在3He—4 He分布图上榴辉岩的氦同位素数据点远离地幔氦的分布范围,而位于大气氦与地壳氦的过渡部位。采用真空压碎方法对榴辉岩中石榴子石和绿辉石的氦同位素组成进行了分析,也未找到地幔氦的明显踪迹。结合大别—苏鲁地区榴辉岩中极低的δ1 8O值、εNd(0 )值等地球化学特征,提出大别—苏鲁地区超高压变质榴辉岩可能是在地壳中形成的,并未曾俯冲至10 0多千米的地幔深度。榴辉岩的3He/4 He值与围岩类型密切相关,榴辉岩的δ1 8O值与围岩的δ1 8O值同步变化,以及含柯石英大理岩、片麻岩和硬玉石英岩等非基性超高压变质岩和脉状榴辉岩的发现,均证明榴辉岩与其围岩一起经历了超高压变质过程,榴辉岩及其围岩在变质过程中未发生明显的位移,即榴辉岩是原地成因的。

关键词：大别山超高压变质榴辉岩氦同位素形成环境地球化学特征地质条件

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黄河水氢、氧同位素组成的空间变化特征及其环境意义

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地质学报 2011年第4期85卷 596-602页

作者：高建飞丁悌平罗续荣田世洪王怀柏李明中国地质科学院矿产资源研究所国土资源部成矿作用与资源评价重点实验室北京100037 黄河水利委员会水文局郑州450004

2005年7月从黄河源头到渤海入海口沿黄河干流系统采集了24个水样,对水的氢氧同位素组成进行了分析。黄河水δD和δ18O值的变化范围分别为-91‰^-44‰和-12.4‰^-4.2‰,并且二者都表现出从上游到下游整体逐渐上升的趋势,但青海玛多样品... 详细信息

2005年7月从黄河源头到渤海入海口沿黄河干流系统采集了24个水样,对水的氢氧同位素组成进行了分析。黄河水δD和δ18O值的变化范围分别为-91‰^-44‰和-12.4‰^-4.2‰,并且二者都表现出从上游到下游整体逐渐上升的趋势,但青海玛多样品除外。黄河水δ18O和δD的线性关系方程为δD=5.69×δ18O-15.51,其斜率5.69稍低于整个黄河流域雨水方程(δD=6.7×1δ18O-5.96)的斜率6.7,明显低于中国雨水方程的斜率7.9(δD=7.9×δ18O+8.2)。黄河水氢氧同位素组成的分析表明,其δD和δ18O值的变化主要受黄河流域干旱自然环境的影响。当黄河流域大气降水降至地表成为地表水后,人类筑坝和工农业取水使径流量减少,水体受本身的蒸发作用和多次循环使用导致长时间停留地表产生进一步蒸发的双重影响。同时对黄河水ΔD值的变化也进行了讨论,表明该值反映出黄河水氢氧同位素组成受到了区域环境特征、降水云团在迁移过程中的变化趋势及区域性水汽循环参与程度等因素的影响。

关键词：黄河氢氧同位素蒸发

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