氢化物发生电感耦合等离子体原子发射光谱法测定碳酸盐岩石样品中痕…

研究了氢化生物发生ＩＣＰ－ＡＥＳ法测定碳酸盐岩石样品中痕量Ａｓ、Ｓｂ和Ｂｉ的各种条件，一了分析方法，分析了２个碳酸盐岩石一级标准物质其结果与推荐值一级，取样０．５ｇ时，Ａｓ、Ｓｂ、Ｂｉ方法的检出限分别为：０．０３、０．０２４、０．１３μｇ／ｇ。     

加热柱芯电极发射光谱测定化探样品中痕量金砷铋锑

探讨了加热柱芯电极的蒸发和激发过程。利用ＺｎＯ为载体，Ｆｅ_２Ｏ_３作增强剂，ＭｇＯ作稳定剂，碘溶液作卤化剂，样品不需化学预富集，使测金的检出限达到１：５万化探扫面要求，同时还可测定砷、铋、锑。各元素检出限分别为：１．ｌ×ｌ０－９Ａｕ，ｌｘ１０－６Ａｓ，０．ｌ×ｌ０－６Ｂｉ，２×ｌ０－６Ｓｂ，试样分析的ＲＳＤ（ｎ＝１０）在４．２％～１９．８％范围，质量符合要求。     

四川石棉金矿床中的黝铜矿族矿物

四川石棉西部碳酸盐岩系中的金矿床产于泥盆系中统,受层间蚀变破碎带控制。其中分布有为数较多的黟同矿族矿物,与黄铁矿、黄铜矿、方铅矿、闪锌矿和Ａｕ－Ａｇ系列矿物共同组成矿石的矿物组合和Ａｕ－Ｃｕ－Ａｇ－Ｐｂ－Ａｓ－Ｓｂ－Ｂｉ的元素组合。电子探针分析表明黝铜矿族矿物有同铜矿、黝铜矿、砷黝铜矿和锌砷黝铜帮等,其中,Ｆｅ－Ｚｎ、ＡｓＳｂ之间分别呈完全类质同象。在垂向上,黝铜矿的成分自上而下由富锌锑向富铁砷演     

氢化物发生ICP—AES法测定岩石样品中痕量砷,锑,铋

研究了氢化物发生ＩＣＰ－ＡＥＳ法测定岩石样品中痕量Ａｓ、Ｓｂ和Ｂｉ的各种条件，拟定了分析方法，用本法以７个一级岩石标样进行分析，结果与推荐值一致。方法的检出限为（×１０＾－６）：Ａｓ０．０７，Ｓｂ０．０３，Ｂｉ０．０２。     

电感耦合等离子体原子发射光谱法测定铅锑合金中九个杂质元素

拟定了电感耦合等离子体原子发射光谱（ＩＣＰ－ＡＥＳ）测定铅锑合金中Ａｓ、Ｂｉ、Ｃａ、Ｃｄ、Ｃｏ、Ｆｅ、Ｍｎ、Ｓｅ和Ｚｎ等九个元素的分析方法,考察了Ｐｂ、Ｓｂ基体对待测元素的干扰情况。样品以ＨＮＯ３分解,酒石酸抑制Ｓｂ水解,ＩＣＰ－ＡＥＳ同时测定多元素。方法对各元素的测定限在０．０７～５．２μｇ／ｇ,相对标准偏差（ｎ＝８）为０．７８％～２５．５％,加标回收率均大于８６％,经与原子吸收光谱法和原子荧光     

新型氢化物发生技术--可移动还原床氢化物发生器Ⅲ. 作为毛细管区带电泳-电感耦合等离子体发射光谱的接口用于砷的形态分析

发展了一种新型的氢化物发生装置———可移动还原床氢化物发生器（ＭＲＢＨＧ）。应用该技术可将经毛细管区带电泳（ＣＺＥ）分离之后的各种砷的化合物转换为相应的氢化物,然后再被引入到电感耦合等离子体发射光谱（ＩＣＰ－ＡＥＳ）进行检测。对不同形态砷的不同化合物的ＣＺＥ分离条件进行了优化,包括缓冲溶液的ｐＨ值及浓度、进样量等。ＣＺＥ－ＭＲＢＨＧ－ＩＣＰ－ＡＥＳ应用于４种砷化合物的定量测定,峰面积的ＲＳＤ（ｎ＝５）在１．９％～１１．７％。４种砷的浓度检出限分别为：Ａｓ（Ⅲ）、甲胂酸和Ａｓ（Ⅴ）０．３２ｍｇ／Ｌ,二甲胂酸钠０．３５ｍｇ／Ｌ     

微量砷,锑,铋流动注射在线还原氢化物发生原子吸收连续测定法

本文采用了流动注射分析技术，用氢化物发生原子吸收分光光度法直接连续测定砷、锑、铋。在稀盐酸介质中，试样溶液中以不同氧化态存在的待测元素被硫脲、碘化钾、抗坏血酸混合还原抑制剂溶液在线还原为易生成氢化物的形式，与硼氢化钠反应生成氢化物，经我们自制的带雾化器的气液分离器分离后进入原子化器。方法稳定灵敏，再现性好，一次溶样可直接连续测定地质样品中砷、锑、铋３种元素。用本方法测定地质标样结果吻合很好，其检出限（３σ）分别为８．８４，６．９１，１２．２９×１０￣（－８）ｇ／Ｌ。相对标准偏差小于２％。     

氢化物发生原子荧光法和无火焰原子荧光法连续测定地球化学样品中…

建立了一种连续测定Ａｓ、Ｓｂ、Ｂｉ、Ｈｇ四元素的方法，对测汞用还原剂及几种测量体系进行了比较，采用对原子化器适当加温的无火焰原子荧光法测汞，以ＫＭｎＯ４消除Ｔｅ、Ｓｅ对汞测定的干扰。本方法Ａｓ、Ｓｂ、Ｂｉ、Ｈｇ四元素的检出限分别为２．０１×１０＾－１０ｇ／ｍｌ１．５６×１０＾－１０ｇ／ｍｌ、２．９８×１０６－１０ｇ／ｍｌ；４．２×１０＾－１１ｇ／ｍｌ；对ＧＳＳＩ平行测定１１欠，Ｈｇ的标准偏差为２．     

氢化物发生-原子荧光光谱法测定铜矿石中的砷锑铋

样品经王水溶矿分解,在氨水存在下,以Fe3+作共沉淀剂分离铜后,用氢化物发生-原子荧光光谱法测定铜矿石中的砷、锑、铋。方法检出限为砷0.19μg/g、锑0.052μg/g、铋0.049μg/g;精密度(RSD,n=10)为砷5.87%、锑7.58%、铋2.42%。     

广东陆丰硫铁矿床中黝铜矿系列矿物的发现及其研究

广东陆丰发现黝铜矿族系列矿物。根据矿物硬度、反射率、Ｘ衍射和电子探针分析数据，鉴定其为黝铜矿、砷黝铜矿、锌锑黝铜矿、锌砷黝铜矿、铋砷黝铜矿和碲砷黝铜矿。研究表明，在陆丰矿床中发现如此多黝铜矿亚种以及Ｆｅ、Ｚｎ、Ａｓ、Ｓｂ、Ｂｉ和Ｔｅ分别呈全完类质同象系列是极为罕见的。通过黝铜矿系列的研究，为在该区乃至东南沿海找矿开拓了新的思路     

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