荧光熄灭法测定煤矸石中微量锌

在pH8.6的Na2B4O7-HCl缓冲介质中，基于微量Zn^2 对5－溴水杨基荧光酮体系的荧光熄灭效应，建立了测定微量Zn^2 的荧光分析方法。结果表明，当激发波长λex=365nm，荧光发射波长λem=538nm时，Zn^2 量在0.0-400.0μg/L内与体系的荧光熄灭程度呈线性关系，方法的检出限为0.38μg/L。方法用于煤矸石中微量Zn^2 的测定，结果与极谱法结果一致，6次测定的RSD＜3．0％。     

容量法测定方铅矿中高含量银

报道了采用HNO3－H2SO4－HF溶样，KI容量法测定硅、铅含量较高样品中高含量银的方法。试验了滴定反应的酸度条件。在1．6mol/L HNO3介质中，银与碘化钾反应，生成碘化银沉淀。银的标准加入回收率为97．8％－100．4％。精密度试验，相对标准偏差为0．92％（n=11)。该法可溶解含硅银矿及角银矿中的银。方法已被用于测定矿石中高含量银。     

硅灰石与盐酸快速反应规律及应用研究

在反应体系pH≤1．5时，硅灰石与盐酸快速反应，经40－100min反应后，体系分为固液两相，固相为水合 二氧化硅沉淀及少量酸不溶性杂质矿物，液相为以溶胶形式存在的二氧化硅和大量CaCl2；当反应pH值在0．3－0．6时，液相中以硅溶胶形式存在的二氧化硅量最大，占总量46％以上。快速反应中仍存在少量具有慢速反应特征的柱状颗粒，该颗粒中心CaSiO3很难反应完全。快速反应产物经表面积较大，若在酸反应前添加有机助剂聚乙二醇（PEG）,反应pH值在0．3－0．6。反应时间40－100min，反应后用KOH溶液中和到pH＝4，可制备高比表面积多孔SiO2，比表面积＞430m^2／g，孔径1－2nm。     

新显色剂DMASA—PF的显色反应研究及应用—I．分光光度法测定痕量镓

2，6，7－三羟基－9－[4-二甲氨基－3－（4－磺酸基苯偶氮）苯基]荧光酮，是一种新的显色剂，简称DMASAPF，该试剂在微碱性介质中，有CPB存在下与镓形成红紫色三元配合物，配合物λmax=560nm，表观摩尔吸光系数ε560＝5．3×10^5L.mol^-1.cm^-1，用双波倍增法测得ε560－520=9.58×10^5L.mol^-1,cm^-1，属于超高灵敏度显色反应，用拟定的方法，进行了地质样品中痕量镓的测定，得到满意的结果。     

SHS原理烧结合成不定形耐火材料的发热体系研究

通过对单一供氧剂体系，复合供氧剂体系的SHS反应产物外观特征和性能测定、物相分析以及尖晶石的生成情况，合成材料的显微形貌特征和能谱分析等特征的研究，得出：SHS原理制备不定形耐火材料时，发热体系采用复合供氧剂体系较单一供氧剂好，通过复合的方法，即碳酸盐－Fe2O3或碳酸盐－硝酸钠的复合，实现了高、中、低温分级供氧，效果明显好于单一供氧体系，其中碳酸盐Fe2O3的最好重量比为2：1，碳酸盐与硝酸钠的最好重量比约为4：1。文中还对发热体系的SHS反应进行了分析。     

测定微量铬(VI)的新方法--邻氯苯基荧光酮荧光熄灭法

基于Cr(Ⅵ）－邻氯苯基荧光酮（O－Cl-PF)-CTMAB体系的荧光熄灭效应，提出了一种测定痕量铬（Ⅵ）的新荧光方法。在pH=8.3的NH4Cl-NH3H2O介质中，该物的最大激发波长和发射波长分别是400nm和 550nm。铬（Ⅵ）量2－48μg/L[0.05-1.2μg/(25mL)]范围内与相对荧光强度ΔF呈线性关系，检出限为1μg/L。该方法可用于电镀废液、湖水、矿石中痕量铬（Ⅵ）的直接测定。     

长江口沉积物全量硼的测定初探

利用ICP－AES测试方法准确测定长江口水下沉积物中的全量硼，对三种不同的样品消化方法进行了初步探索，我们认为HF－HCIO4－HNO3-H3PO4消化方法是可靠的理想的样品消化方法。     

峨眉山地区大气漂尘化学组成研究

为了揭示峨眉山大气漂尘的化学特征，研究小组分别在1998，1999，2000年使用小型大气采样器进行采样，并测得样品中含有水溶性化学成分（Na^ ,K^ ,Mg^2 ,Ca^2 ,SO4^2-,NO3^-,NH4^ 和Cl^-)和酸溶性化学成分（Pb和Zn)。这一地区三年的大气成分与1990年的相似，而且峨眉山的Na^ ,Cl^-,SO4^2-,NO3^-,Ca^2 ,NH4^ ，Pb和Zn浓度分别比日本山形县鹤岗的要高出4－15，3－19，3－5，3－6，13－23，4－7，11－28和10－23倍之多。     

HNO3-KClO3-NH4Cl分解I2-CCl4萃取光度法测定矿石中的铜

利用HNO3－KClO3饱和液溶解矿样后，加NH4Cl蒸干破坏氮的氧化物，用六偏磷酸钠作掩蔽剂，采用I2－CCl4萃取光度法测定矿石中的铜，取得了较为满意的结果。     

微量锑的催化极谱测定

本文提出了盐酸－硫酸－抗坏血酸－钽试剂－溴代十六烷基三甲胺催化体系测定矿石中微量锑，采取巯基棉纤维分离干扰，锑浓度在０￣１０μｇ／１０ｍｌ，范围内呈线性关系。方法快速、稳定、灵敏度高，用于矿石中微量锑的测定，结果满意。     

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