电感耦合等离子体发射光谱法直接测定黄铜矿中多元素

应用电感耦合等离子体原子发射光谱法直接测定黄铜矿中Cu、Fe、Cd、Co、In、Mn、Ni、Pb和Zn9种元素。试样经HCl-HNO3溶解，不需要化学分离，用干扰系数校正法消除黄铜矿中主量元素Cu和Fe对其它微量元素的干扰，以国家一级标准物质GBW 07268检验方法的准确度，结果与标准值相符，相对误差除Ni元素外，其它均小于5．00％，精密度(RSD，n=8)为2．55％～7．62％。     

沉淀分离—火焰原子吸收光谱法连续测定锌精矿中杂质元素

利用Ｚｎ（ＯＨ）２的两性沉淀富集待测杂质元素，分离高含量Ｚｎ以排除干扰，用火焰原子吸收法测定其中的杂质元素含量。实验结果表明：分离后残留的Ｚｎ对Ｆｅ、Ｃｄ、Ｎｉ、Ｍｎ、Ａｇ的测定无干扰；各元素之间互不干扰。加标回收率为９３％￣１０６％，对菱锌矿中几种杂质元素进行测定，结果与ＩＣＰ－ＡＥＳ法相符，各元素测定的相对标准偏差（ｎ＝１２）为４．１％￣８．８％。     

沉淀分离－火焰原子吸收光谱法连续测定锌精矿中杂质元素

利用Ｚｎ（ＯＨ）＿２的两性沉淀富集待测杂质元素，分离高含量Ｚｎ以排除干扰，用火焰原子吸收法测定其中的杂质元素含量。实验结果表明：分离后残留的Ｚｎ对Ｆｅ、Ｃｄ、Ｎｉ、Ｍｎ、Ａｇ的测定无干扰；各元素之间互不干扰。加标回收率为９３％～１０６％，对菱锌矿中几种杂质元素进行测定，结果与ＩＣＰ－ＡＥＳ法相符，各元素测定的相对标准偏差（ｎ＝１２）为４．１％～８．８％。     

敞开酸溶-电感耦合等离子体光谱法测定钨矿石和钼矿石中微量元素

钨矿石和钼矿石具有丰富的共生或伴生元素,检测共生或伴生元素的含量有利于矿产资源的综合利用.在国家标准方法中钨矿石和钼矿石的共生或伴生元素含量是按元素分别检测,效率很低.本文在敞开体系中用盐酸+硝酸+氢氟酸+高氯酸消解样品,以7％盐酸溶解盐类,电感耦合等离子体发射光谱同时测定钨矿石和钼矿石中铋、钴、铜、锂、镍、磷、铅、锶、钒、锌等10种微量元素.选定了各元素的分析谱线和光谱级次,采用离峰背景校正法消除背景干扰,干扰元素校正系数法消除元素间的谱线重叠干扰.方法检出限为1.43 ～ 18.8 μg/g,加标回收率为90％ ～ 110％.经钨矿石和钼矿石标准物质分析验证,测定结果与标准值基本吻合,方法精密度(RSD,n=10)小于8％.该方法克服了碱熔引入大量碱金属元素以及可能引入杂质的缺陷,又不用处理钨酸和钼酸沉淀,能快速测定钨矿石和钼矿石中微量共生或伴生元素.     

锰矿中多元素ICP光谱法定量分析

锰矿中含有大量的锰,锰对分析元素的干扰比较严重,采用碳电弧法进行多元素分析较困难,而在1CP光源中,原子线的激发受到抑制,在2500A以上光谱区域,锰的干扰情况相对减少.     

少量树木年轮样品的X射线荧光光谱分析

采用活体采样技术，对少量树木年轮样品的制备和测定方法进行了研究。使用X射线荧光光谱和透空测量方式，对树木年轮中Cl、Si、Na、Al、Mg、P、S、Ca、K、Ti、Mn、Fe、Zn、Cu、Pb、Rb、Sr、Ba等18种元素进行了分析测定，结果与其他方法相符，部分元素的精密度（RSD，n=10）为0．2％～15％。该法效果比较好，同时保证了少量树木年轮样品无损失、无化学组成变化．为后续的等离子体原子发射光谱和质谱联测创造了条件。     

辉碲铋矿单矿物的主次痕量元素分析

建立了一个单矿物分析流程，制备试样溶液后，采用ＩＣＰ－ＡＥＳ法、ＡＡＳ法、分光光度法、容量法和催化极谱法，完成了辉碲铋矿单矿物主、次和痕量元素Ｂｉ和Ｔｅ在测定中的相互干扰情况；对主元素的测定方法进行了精密度试验，对于含Ｔｅ３６．３０％的试样测定６次，其ＲＳＤ为０．６６％，对于含Ｂｉ５８．４５％的试样平行测定９次，其ＲＳＤ为０．０７２％。为碲多金属矿床辉碲铋矿研究提供了块状、稠密浸染状和浸染状矿石中     

电感耦合等离子体发射光谱法同时测定碳酸盐岩石中19个元素

使用ＪＹ７０Ｐ 电感耦合等离子体发射光谱仪,分别考察了一些主要基体对待测元素的各种干扰。综合各种干扰因素,采用干扰系数校正法消除综合干扰,拟定了适用于包括碳酸盐岩石的区域化探样品中１９ 个元素的电感耦合等离子体原子发射光谱同时测定方法。１９ 个元素的测定限在０ ．２０ ～８ ．０ μｇ／ｇ 。对碳酸盐岩石国家一级标准物质ＧＢＷ０７１０８ 进行检测,各元素的结果与标准值吻合,相对标准偏差（ｎ ＝ １１） 在１ ．２ ％ ～５ ．３ ％ 。     

X射线荧光光谱测定钛合金样品中多元素

以化学法标定的钛合金作为标准样品,用理论α系数及干扰曲线法进行基体效应和谱线重叠干扰的校正,开发了用X射线荧光光谱测定钛合金样品中除Ti外的常量和微量元素的方法。用该方法测定结果与化学值相符。10次制样测量,各元素的RSD≤1.25%。     

石墨炉原子吸收光谱法测定镁阳极中的痕量镍

研究了镁阳极中主次元素对测定镍的干扰,通过控制基体总量,塞曼效应扣除背景干扰,用石墨炉原子吸收光谱法直接测定痕量镍。回收率９５％￣１０４％,相对标准偏差８．７％。     

The terrestrial fauna of the Late Triassic Pant-y-ffynnon Quarry fissures,South Wales,UK and a new species of Clevosaurus (Lepidosauria: Rhynchocephalia)

Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco.     

The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts

The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H₂O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H₂O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species.     

Quaternary stresses revealed by calcite twinning inversion: insights from observations in the Savonnières underground quarry (eastern France)

Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ₁ roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003).     

HYDROGEOLOGY

正20141756 Chen Ruige(Mathematical College,China University of Geosciences,Beijing100083,China);Zhou Xun Numerical Simulation of Groundwater Level Fluctuation in a Coastal Confined Aquifer with Sloping Initial Groundwater Level Induced by the Tide(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(7),2013,p.1099-1104,6 illus.,16 refs.) Key words:confined water,groundwater level     

METAMORPHIC PETROLOGY

正20141408 Cai Jia(Institute of Geology,Chinese Academy of Geological Sciences,Beijing100037,China);Liu Fulai Petrogenesis and Metamorphic P-T Conditions of Garnet-Spinel-Biotitebearing Paragneiss in Danangou Area,Daqingshan-Wulashan Metamorphic Complex Belt(Acta Petrologica Sinica,ISSN1000-0569,CN11-1922/P,29(7),     

SERIALS

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GEOPHYSICAL EXPLORATION

正20142386An Guoying(China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,China)Application of Satellite Remote Sensing in Regional Hydrogeological Investigation:Taking Cenozoic Strata in Wenquan Sheet(1∶250 000)of Karakoram Range as an Example(Geosci-     

QUATERNARY GEOLOGY & GEOMORPHOLOGY

正20141016An Chengbang(Key Laboratory of Western China’s Environmental Systems,Ministry of Education,Lanzhou University,Lanzhou 730000,China);Zhao Yongtao Lake Records during the Last Glacial Maximum from Xinjiang,NW China and Their Climatic Impli-     

PETROLEUM GEOLOGY

正20141538 Cao Qing(School of Earth Sciences and Engineering,Xi’an Petroleum University,Xi’an 710065,China);Zhao Jingzhou Characteristics and Significance of Fluid Inclusions from Majiagou Formation,Yichuan Huangling Area,Ordos Basin(Advances in Earth Science,ISSN1001-8166,CN62-1091/P,28(7),2013,p.819-828,7 illus.,3 tables,43 refs.)     

GEOCHEMISTRY

正20142002 Wei Hualing(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang065000,China);Zhou Guohua Element Content and Mineral Compositions in Different Sizes of Soil in Tongling Area,Anhui Province(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(11),2013,p.1861