铱——碘化钾——丁基罗丹明B的显色反应及分光光度法测定铱

在ＰＨ３．４时，铱能与碘化钾、丁基罗丹明Ｂ型成紫色络合物，其组成比Ｉｒ４＋：Ｉ＾－：ＢＲｈＢ＾＋＝１：６：２，最大吸收波长为６１０ｎｍ，ε＝１．３６×１０＾５Ｌ．ｍｏｌ＾－１．ｃｍ＾－１，铱在（０－８）μｇ／２５ｍｌ范围时服从比尔定律，采用阳离子交换树脂分离大量基体离子，可对冶金物料中微量铱进行测定。     

新矿物高台矿—铱的碲化物

高台矿产在纯橄榄岩体内的铬矿体中，在铬矿石及矿体邻近的砂矿中均可找到。常呈细脉状，等粒状聚集体，与硫铱矿、双峰矿紧密共生。矿物粒径０．０５－０．２ｍｍ，不透明，钢灰色，条痕为黑色，金属光泽。ＨＭ＝３。ＶＨＮ２０＝１１７ｋｇ／ｍｍ。无解理和断口。由于颗粒太小比重不能直接测定，计算得出矿物密度为１０．００ｇ／ｃｍ＾３。显微镜下矿物反射色为亮白微带蓝色调。无内反射。均质性。偶见淡黄、淡蓝偏光色。双反射与     

新矿物双峰矿—铱的二碲化物

双峰矿产在纯橄榄岩体铬矿体中。在铬矿石及矿体邻近的砂矿中均可找到，呈块状聚集体或板片状与硫铱矿、锇自然铱矿紧密共生。直径０．５￣０．２ｍｍ，脉状的宽０．０５￣０．１０ｍｍ，长０．５￣１．０ｍｍ。金属光泽。条痕黑色。Ｈ（Ｍ）３。ＶＨＮ２０１０８ｋｇ／ｍｍ＾２（平均）。解理：（０００１）完全。性脆。计算密度为１０．１４ｇ／ｃｍ＾３。反射色：亮黄白带蓝色调。内反射无。非均质性中等，偏光色为淡蓝或淡黄。双     

镁—4,5—二溴苯基荧光酮络合吸附波及其应用

在ＰＨ１０．３的ＮａＢ４Ｏ７－ＮａＯＨ介质中,Ｍｇ＾２＋与４,５－二溴苯基荧光酮形成络合物,于－０．９５Ｖ出现一灵敏的阴极波。Ｍｇ＾２＋的质量浓度在８．２－５８μｇ／Ｌ时与峰电流呈线性关系,检出限为２．１μｇ／Ｌ。     

洱海近代沉积物中碳-氮-硫-磷的地球化学记录

在＾２１０Ｐｂｅｘ和＾１３７Ｃs计年基础上,对采自洱海深水湖区沉积物柱芯进行了Ｃ ｉｎｏｒｇ（无机碳）、Ｃｏｒｇ（有机碳）、Ｎ、Ｓ含量和Ｐ开矿分析。Ｃｏｒｇ生趣剖面具“沉降－降解－堆积”三阶段分布特征,沉降和堆积通量分别为１２．７ｇ／（ｍ＾２．ａ）和７．２０ｇ／（ｍ＾２．ａ）;降解速率常数为０．０１７ａ＾－１,寄宿时间为４０a。Ｎ的生趣分布与Ｃｏｒｇ相似,沉降和堆积通量分别为２．６２ｇ／（ｍ＾２．ａ     

吡啶聚苯乙烯螯合树脂分离——原子发射光谱法测定碳酸盐岩石中铷铯

研究了以（ＮＨ４）２ＣＯ３为沉淀剂和以吡啶聚苯乙烯螯合树脂为柱床分离Ｃａ＾２＋、Ｍｇ＾２＋的各种条件，制订了吡啶聚苯乙烯螯全树脂分离－原子发射光谱测定Ｒｂ、Ｃｓ的方法。其检出限为０．０６μｇ／ｇ（Ｒｂ）、０．０２μｇ／ｇ（Ｃｓ）相对标准偏差分别是８．７６％、１０．５％。方法应用于碳酸盐岩中Ｒｂ、Ｃｓ的测定，其结果与其它方法十分相近。     

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．     

含油气性水化学特征指标及评价模型研究

由灰色关联分析、模糊聚类结果，提取出反映四川盆地水化学主要特征的最有效特征指标：二叠系为三维荧光指纹图形、顶空气总烃与重烃、矿化度、Ｎａ＾＋含量、Ｃａ＾２＋／Ｃａ总、Ｍｇ＾２＋／Ｍｇ总；上三叠统为三维荧光指纹图形、顶空气Ｃ１－Ｃ３的Ｄ函数、Ｌｉ＾＋／Ｎａ＾＋、矿化度、Ｃａ＾２＋／Ｃａ总、Ｍｇ＾２＋／Ｍｇ总、Ｎａ＾＋含量。由上述特征指标及成因指标δ＾１８Ｏ、水溶甲烷δ＾１３Ｃ，构成了天然气保存的水化     

催化动力学光度法测定痕量铁的研究

研究了在ｐＨ８．５的Ｎａ２Ｂ４Ｏ７－ＨＣｌ介质中,Ｆｅ＾３＋催化Ｈ２Ｏ２氧化茜素红褪色,建立了动力学光度法测定痕量Ｆｅ＾３＋的方法。方法检出限０．０４３μｇ／ｍｌ,线性范围０￣０．１７μｇ／ｍｌ,除Ｍｎ＾２＋、Ｃｏ＾２＋等离子外,其余共存离子基本无干扰,实测了天然水和化学试剂中痕量Ｆｅ＾３＋,结果满意。     

电感耦合等离子体发射光谱法直接测定地质试样中铀

采用电感耦合等离子体发射光谱对地质试样中高低含量的铀的直接测定方法进行了研究，选择了仪器的最佳工作条件，考察了共存元素对测定的干扰情况。选定条件下，方法的检出限在λＵ３８５．９５８ｎｍ和４０９．０１４ｎｍ分别０．６μｇ／ｇ和０．７μｇ／ｇ，检测范围可以在ω（Ｕ）１０＾－６－１０＾－２水平。     

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