PAN－S光度法测定水和矿石中铋

本文研究了ＰＡＮ－Ｓ铋的显色反应。配合物的最大吸收峰位于５４６ｎｍ处，表现摩尔吸光系数为１．２０×１４￣４Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１），铋量ρ（Ｂｉ）／（μｇ·ｍｌ￣（－１））在０－２．４范围内符合比尔定律，采用疏基棉分离常见干扰离子富集铋，使选择性和灵敏度显著提高，方法用于水及矿石中铋的测定，结果满意。     

5－Br－PADAP分光光度法测定岩矿中的微量铌

２－［（５－溴－２－吡啶）偶氮］５－二乙氨基苯酚（简称５－Ｂｒ－ＰＡＤＡＰ）是一种高灵敏度显色剂，它与Ｎｂ（Ｖ）、酒石酸形成蓝色的三元络合物。其最大吸收峰为６１０ｎｍ，表观摩尔吸光系数为５．９×１０￣４Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１），络合物在２５ｍｌ溶液中，ρ（Ｎｂ＿２Ｏ＿５）／（μｇ·ｍｌ￣（－１））为０－１．６符合比尔定律。络合物可稳定２４ｈ以上。以ＥＤＴＡ－Ｃａ消除共存离子的干扰，本法的选择性较好，准确度高，且简便、快速。适用于各种岩矿中微量Ｎｂ的测定。     

钛—邻氯苯基荧光酮—Trutib X—100显色反应的研究及微量钛的测定

本文研究了在非离子表面活性剂Ｔｒｉｔｏｎｘ－１００存在的情况下，邻氯苯基荧光酮（Ｏ－Ｃｌ－ＰＦ）与钛的显色反应。试验表明，在０．１０～０．１４ｍｏｌ·Ｌ￣（－１）Ｈ＿２ＳＯ＿４介质中，Ｏ－Ｃｌ－ＰＦ与钛形成灵敏度极高的红紫色配合物，其最大吸收峰位于５４０ｎｍ处，表现摩尔吸光系数为１．８×１０￣５Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１），钛含量在０～３μｇ／２５ｍｌ范围内服从比尔定律。该方法用样少，操作简便，灵敏度高，选择性好，适于测定地质样品中的微量钛。     

PAN－S光度法测定水和河泥中微量锰

本文研究了ＰＡＮ－Ｓ与锰的显色反应。配合物的最大吸收峰位于５３８ｎｍ波长处，表观摩尔吸光系数为２．９×１０￣４Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１），锰量在０─１．６μｇ／ｍｌ范围内符合比尔定律，方法用于水和河泥中微量锰的测定，结果良好。     

涂钼石墨管石墨炉原子吸收法测定地质样品中微量镓、铟和铊

研究了用钼酸铵浸渍处理石墨管、石墨炉原子吸比法测定镓、铟和铊的最挂条件。实验证明，采用硝酸—氢氟酸—硫酸体系溶解样品，涂钼石墨管直接测定样品中的镓、铟和铊，能有效地避免它们在原子化之前以氧化物形式挥发的损失，减少了测定干扰，提高测定的灵敏度。对６个地质标样的测定结果是满意的。木法对镓、铟和铊的检测下限分别为０．９×１０￣（－１１）ｇ，１．７×１０￣（－１１）ｇ和６．２×１０￣（－１１）ｇ；相对标准偏差分别为１．４％、４．８％和３．０％。     

水中痕量铅的高灵敏度测定新方法的研究

本文研究了微晶萘吸附Ｐｂ（Ⅱ）—５—Ｂｒ—ＰＡＤＡＰ显色新体系的最佳实验条件。沉定分离洗涤后溶解于丙酮，在波长５６０ｎｍ处测定其吸收光度。在５ｍｌ丙酮溶液中铅含量ｐ（Ｐｂ）／（　μｇ·ｍｌ￣－１）在０—５范围内符合比尔定律，表现在尔吸光系数为５．６×ｌ０￣４Ｌ·ｍｏｌ￣１·ｃｍ￣－１。方法用于水中痕量铅的测定，结果满意。     

5‘—硝基水杨基荧光酮与锆显色反应及其应用

在０．０８￣０．１０ｍｏｌ／Ｌ ＨＣｌ介质中，溴化十六烷基三甲铵（ＣＴＭＡＢ）存在下，Ｚｒ（Ⅳ）与５＇－硝基水杨基荧光酮（５＇－ＮＳＦ）发生显色反应，形成１：４的桔红色络合物，λｍａｘ＝５４０ｎｍ，ε为１．４６×１０＾５Ｌ·ｍｏｌ＾－１·ｃｍ＾－１，Ｚｒ（Ⅳ）含量在０￣０．５ｍｇ／Ｌ符合比尔定律。方法用于氧化铝及陶瓷釉料中锆的测定，结果与ＩＣＰ－ＡＥＳ法相符，ＲＳＤ（ｎ＝５）在１．３％￣３．７％。     

2-〔2-(6-甲基苯并噻唑)偶氮〕-5-二乙氨基苯甲酸与钴的显色反应及其应用

在十二烷基硫酸钠存在下，于ｐＨ４．８￣７．４的缓冲溶液中，２－〔２－（６－甲基苯并噻唑）偶氮〕－５－二乙氨基苯甲酸（６－Ｍｅ－ＢＴＡＥＢ）与Ｃｏ（Ⅱ）发生显色反应，形成稳定的蓝紫色络合物，其组成为ｎＣｏ（Ⅱ）：ｎ６－Ｍｅ－ＢＴＡＥＢ＝１：２，最大吸收波长为６５０ｎｍ，ε为１．３８×１０＾５Ｌ·ｍｏｌ＾－１·ｃｍ＾－１，Ｃｏ（Ⅱ）质量浓度在０￣０．３２ｍｇ／Ｌ时服从比尔定律。方法可直接用于维生素Ｂ１     

对碘偶氮氯膦与铅显色反应及其应用

研究了对碘偶氮氯膦（ＣＰＡ－ｐＩ）与Ｐｂ￣２＋的显色反应。在ｐＨ５．８的（ＣＨ＿２）＿６Ｎ。－ＮＯ＿３缓冲介质中，Ｐｂ￣２＋与ＣＰＡ－ｐｌ形成１：２的蓝绿色配合物，在６７５ｎｍ处测定配合物的吸光度，其表现摩尔吸光系数为２．４７×１０￣４Ｌ．ｍｏｌ￣－１·ｃｍ￣－１Ｐｂ￣２＋浓度在０～１．１６×１０￣－５ｍｏｌ／Ｌ即０～２．４μｍｌ）符合比尔定律。试验了２０余种共存离子的影响，经共沉淀结合巯基棉分离预处理试样溶液后，测定了硫精砂中微量Ｐｂ的含量。     

1—（2—羟基—3,5—二硝基苯基）—3—[4—（苯基偶氮）苯基]—三氮烯与铜的显色反应

研究了新合成的１－（２－羟基－３,５－二硝基苯基）－３－「４－（苯基偶氮）苯基」－三氮烯（ＨＤＮＰＡＰＴ）试剂与铜的显色反应。在乳化剂ＯＰ存在下,ＰＨ１１．０的Ｎａ２Ｂ４Ｏ７－ＮａＯＨ介质中,铜与ＨＤＮＰＡＰＴ形成的红色配合物,其组成比为１：２,λｍａｘ＝５４０ｎｍ,表观摩尔吸光系数ε５４０＝１．７３×１０＾５Ｌ·ｍｏｌ＾－１·ｃｍ＾－１,铜的质量浓度在０￣３６０μｇ／Ｌ符合比尔定律。方法应用于大     

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