流动注射－原子荧光法测定岩矿中痕量硒和碲

讨论了题示方法中的干扰，指出在一般岩石中多数共存元素不干扰Ｓｅ和Ｔｅ的测定；Ｃｕ的干扰可在含Ｆｅ￣３＋、ＨＣｌＯ＿４的介质中加入邻菲罗啉沉淀预先消除；Ｐｂ的干扰可在Ｈ＿２ＳＯ＿４分解试样时形成ＰｂＳＯ＿４消除；试液保存在塑料容器中可免除残留Ｆ￣－的影响。所拟方法每次采样１ｍＬ，每小时测定９０次。对Ｓｅ和Ｔｅ的检出限均为０．２μｇ／Ｌ，测定浓度为１０μｇ／Ｌ的Ｓｅ和Ｔｅ，其ＲＳＤ（ｎ＝１２）分别为３．７％和４．３％。经标样分析验证，方法可行。     

氢化物—原子荧光法测定岩石中痕量硒的干扰及消除

用ＨＦ－ＨＣｌＯ４－ＨＮＯ３混合酸分解样品，采用Ｆｅ＾３＋作释放剂，研究了不同量的Ｆｅ＾３＋与ＨＣｌ酸度对Ｓｅ荧光强度的影响和干扰离子消除的效果，以及Ｆｅ＾３＋存在Ｔｅ存在下对Ｓｅ测定的影响。方法的检出限为０．０１μｇ／ｇ．样品中Ｓｅ量为０．１μｇ／ｇ的相对标准偏差（ｎ＝１１）是５．４％。用于岩石标样中痕量Ｓｅ的测定，结果较好。     

流动注射—催化光度法测定痕量锰

在非离子表面活性剂吐温－８０存在的Ｈ３ＰＯ４介质中，Ｍｎ＾２＋对Ｖ（Ｖ）氧化二安替比林苯乙烯甲烷（ＤＡＶＰＭ）成红色化合物的反应具有较强的催化作用，基于此采用流动注射－催化光度法测定了痕量Ｍｎ＾２＋，该方法的检测波长为５５５ｎｍ，检出限为０．０２μｇ／Ｌ Ｍｎ，线性范围为０．０２￣６μｇ／Ｌ Ｍｎ，进样频率为６０次／ｈ，对５μｇ／Ｌ Ｍｎ进行１０次测定的相对标准偏差为１．８％。经环境标准样品分析验     

离子交换分离——离子色谱法测定造币镀液及其废液中氯离子及硫酸根

提出了用７３２型阳离子交换树脂分离造币镀镍液中高含量Ｎｉ,离子色谱法测定Ｃｌ＾－及ＳＯ４＾２－的方法。确定了分离条件。样品经分离后,进入离子色谱仪时Ｎｉ的残留浓度≤０．０１２ｍｇ／Ｌ,去除率≥９９．６％。Ｃｌ＾－的相对标准偏差为０．３２％￣１．４５％,回收率９９．０％￣１００．８％;ＳＯ４＾２－的相对标准偏差为０．４５％￣０．８９％（ｎ＝４）,回收率９８．８％￣１０１．２％。同一分离柱经多次测定造     

meso—四（2—磺酸萘基）卟啉与锰（Ⅱ）显色反应研究

研究了新合成的ｍｅｓｏ－四（２－磺酸萘基）卟啉（ＴＮＰＳ４）与Ｍｎ＾２＋的显色反应。在ｐＨ８．０的Ｎａ２Ｂ４Ｏ７－ＨＣｌ缓冲溶液中，ＴＮＰＳ４与Ｍｎ＾２＋形成稳定的配合物，最大吸收波长４７０ｎｍ，配合物组成为ＴＮＰＳ４：Ｍｎ＾２＋＝２：１，表观摩尔吸光系数ε＝１．０３×１０＾５Ｌ·ｍｏｌ＾－１·ｃｍ＾－１，线性范围０．０－５．０μｇＭｎ＾２＋／２５ｍｌ。用于化探样品中Ｍｎ的测定，结果令人满意。     

溴邻苯三酚红-丁基罗丹明B高灵敏分光光度法测定微量钛的研究

在乳化剂ＯＰ和聚乙烯醇ＰＶＡ－１２４存在下,于０．０２ｍｏｌ／ＬＨ２ＳＯ４介质中,Ｔｉ（Ⅳ）与溴邻苯三酚红（ＢＰＲ）和丁基罗丹明Ｂ（ＢＲＢ）产生高灵敏协同显色反应。配合物λｍａｘ＝５９６ｎｍ,ε为１．５０×１０５Ｌ·ｍｏｌ－１·ｃｍ－１,钛的质量浓度在０～４８０μｇ／Ｌ符合比尔定律,配合物的组成为ｎＴｉ∶ｎＢＰＲ∶ｎＢＲＢ＝１∶２∶２。考察了共存离子的干扰情况。结合阴离子交换树脂分离富集,方法用于地质样品中微量钛的测定,结果与标准值相符,其ＲＳＤ（ｎ＝５）小于２％。     

矿石中稀土总量快速分离法的改进

半微量量取样,碱熔,掩蔽剂提取,用２０ｇ／Ｌ Ｎａ２ＣＯ３－１ｇ／Ｌ水杨酸钠混合洗涤济洗除在稀土沉淀中的铀和钍,分取制得的试液用偶氮胂ＩＩＩ光度法测定稀土总量。可测范围的质量分数（Ｗ／１０＾－２）为０．０１～１２．００,准确度与ＰＭＢＰ－苯萃取法所得结果相符,精度度（ＲＳＤ,ｎ＝１２）为２．８％。     

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％。     

基性岩超基性岩中痕量铂的催化极谱测定

本文针对基性岩超基性岩中ＳｉＯ＿２，Ａｌ＿２Ｏ＿３，Ｆｅ＿２Ｏ＿３，ＭｇＯ，ＣａＯ等含量高的特点，确定了１ｍｏｌ／Ｌ盐酸—０．１ｇ／Ｌ硫酸肼—３×１０￣（－３）ｍｏｌ／Ｌ甲醛底液测定痕量铂的体系，通过控制温度与改进熔矿方法，增强了体系稳定性，消除了ＳｉＯ＿２等的干扰。用于铜镍矿、铬铁矿和硅酸盐管理样的测定，结果符合要求。     

热液体系中Si的络合作用

在不同温度、ＰＨ和硅浓度条件下,实验标定了Ａｕ－ＳｉＯ以及Ｓｎ－ＳｉＯ２之间的络合反应：Ａｕ＾＋＋Ｈ３ＳｉＯ４＾－之间的络合反应：Ａｕ＾＋＋Ｈ４ＳｉＯ＝ＡｕＨ３ＳｉＯ４ ｌｇＫ＝－１．６５４３６＋９６１１．２１／Ｔ;Ｓｎ＾４＋＋４Ｈ３ＳｉＯ４＾－＝Ｓｎ（Ｈ３ＳｉＯ４）４;ｌｇＫ２００ｃ＝４２．７３。通过与Ａｕ－Ｃｌ、Ａｕ－ＨＳ以及Ｓｎ－ＯＨ络合物迁移能力的比较,表明在具地质意义的Ｐ睡ＥＨ条件下,Ａ     

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