钴—对乙酰基偶氮羧极谱催化波的研究

在ＨＡｃ－ＮａＡｃ，ＮａＮＯ２，ＣＴＭＡＢ介质中，Ｃｏ与对乙酰基偶氮羧络合物产生一灵敏的极谱催化波，峰电位在－０．９０Ｖ，Ｃｏ浓度在（０．０１－０．１２）μｇ／２５ｍｌ范围内与峰电流呈线性关系，检测下限为２×１０＾－４μｇ／ｍｌ，常见共存离子不干扰测定。     

催化褪色光度法测定痕量锰的研究及应用

本研究了在ＰＨ＝４．０醋酸－醋酸钠缓冲溶液中，锰催化ＫＩＯ４氧化５－Ｂｒ－ＰＡＤＡＰ的褪色反应及其动力学条件，建立了一个痕量锰的高灵敏度新方法，方法灵敏度为１．３２×１０＾－１０ｇ／ｍｌ，测定范围Ｍｎ＾２＋浓度为０￣１．５μｇ／ｍｌ，用于测定人发，自来水，茶叶中痕量锰，结果满意。     

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。     

二溴羟基苯基荧光酮与铝显色反应的研究及应用

在ｐＨ为６．５的ＨＡｃ－ＮａＡｃ介质中，ＣＰＢ存在且经６０～７０℃加热，Ａｌ￣３＋与二溴羟基苯基荧光酮（ＤＢＨ－ＰＦ）４ｍｉｎ即完成显色反应，形成１：２紫红色络合物，吸光度至少稳定２４ｈ，最大吸收峰位于５６８ｎｍ处，摩尔吸光系数为１．１８×１０￣５，Ａｌ量在０～０．２μｇ／ｍｌ范围内符合比不定律。方法已应用于岩矿中微量Ａｌ的直接测定，其结果与标准值吻合较好，ＲＳＤ（ｎ＝５）均＜３％。     

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。     

腐殖酸中硼的快速分光光度法测定

用ＨＣｌ和Ｈ２Ｏ２分解经５７０℃灰化后的腐殖酸样品，在ＰＨ４－６的条件下，样品中的Ｂ与水杨醛－Ｈ酸钠盐混合显色液形成可溶性棕黄色络合物，其最大吸收峰在４１０ｎｍ－４２０ｎｍ处，Ｂ量在０－１６μｇ／ｍｌ服从比尔定律，方法用于腐殖酸中Ｂ的测定。     

勘查地球化学找矿中重要指示元素的野外快速分析法（二）银的分析方法

发展了一种可在野外快速测定０．０１０—５０μｇ／ｇ银量的新方法。此法由两个各自独立而又配套的部分组成。一是直接测定０．２５—５０μｇ／ｇ银量的Ａｇ－ＴＭＫ－ＳＤＳ三元络合物光导比色测定法；二是测定０．０１０—０．２５μｇ／ｇ银量的巯基棉分离富集微珠析出比色法。可在同一份试液中依次完成。前者检出限为０．００６μｇ／ｍｌ（Ｋ＝３）；测定铜、铅和锌矿石标样ＧＳＯ－Ｃｕ－１（含银３．８７μｇ／ｇ）、ＧＳＯ－Ｐｈ－１（含银１４．７μｇ／ｇ）和ＧＳＯ－Ｚｎ－１（含银１３．５μｇ／ｇ）中的银，ＲＤＳ（ｎ＝１１）分别为１．６％、３．７％和３．４％；后法可检出５ｎｇ／ｇ银；测定地球化学标样ＧＳＤ－３（含银０．５９μｇ／ｇ）中的银，ＲＳＤ（ｎ＝１１）为６．ｔ％。方法较为简便、快速、准确和灵敏。用光导比色计测定，结果准确度、精度均有较大改善，且与室内原子吸收法相当。故所定方法具有广阔的应用前景。     

混合增溶剂多元配合物体系光度法测定铌

研究了在聚乙烯醇和阿拉伯胶混合增溶剂存在下，铌钼酸根与结晶紫形成的缔合物直接在水相中光度法测定Ｎｂ。该方法线性范围０～０．４μｇ／ｍｌＮｂ，ε＿６４４为３．７×ｌ０；大多数共存离子不干扰测定，在增溶体系下提高了Ｔａ的允许量；有色体系稳定时间为２ｈ，是目前测定Ｎｂ的灵敏度高、选择性较好、线性范围较宽的水相光度法之一。对于含Ｎ６量在１０￣－４～１０￣－３级的试样测定６次，其ＲＳＤ在１．９％～３．２％；经标样分析验证，其结果与标准值相符。     

钪－对氟偶氮氯膦－TritonX－100显色反应及其应用

当ＴｒｉｔｏｎＸ－１００存在时，Ｓｃ与对氟偶氮氯膦（ＣＰＡ－ｐＦ）在常温下反应形成ｐ型络合物，表现摩尔吸光系数为６．Ｉ×Ｉ０￣４Ｌ·ｍｏｌ￣－１·ｃｍ￣－１，ＴｒｉｔｏｎＸ－１００可提高络合物的稳定性使之至少稳定２４ｈ，Ｓｃ（Ⅲ）浓度在０．０～０．μｇ／ｍｌ符合比尔定律。方法可用于合金中痕量Ｓｃ的测定。     

二溴羟基苯基荧光酮荧光熄灭法测定铝的研究及应用

在ｐＨ６．５的ＨＡｃ－ＮａＡｓ介质中,Ｔｒｉｔｏｎ－Ｘ－１００存在下,铝与二溴羟基羟基苯基荧光酮形成１：３的紫色络合物使二溴羟基苯基荧光酮的荧光熄灭。络合物的λｅｘ＝６２ｎｍ,λｅｍ＝６５２ｎｍ,铝含量在０－１２０μｇ／Ｌ范围内与ΔＦ呈线性关系,相关系数λ＝０．９９９６,检测限０．４μｇ／Ｌ,以此建立了测定微量铝的新方法,方法用于岩石矿物以及茶叶,人发和水样中微量铝的测定,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.     

Définition d'une limite multicritère ; stratigraphie du passage Campanien–Maastrichtien du site géologique de Tercis (Landes,SW France)Definition of a multi-criteria boundary; stratigraphy of the Campanian–Maastrichtian interval of the geological site at Tercis (Landes,SW France)

Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414.     

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).     

NONMETALS DEPOSITS

正20141520 Bo Ying(Key Laboratory of Metallogeny and Mineral Assessment,MLR,Beijing 100037,China);Liu Chenglin Saline Spring Hydrochemical Characteristics and Indicators for Potassium Exploration in Southwestern and Northern Tarim Basin,Xinjiang(Acta Geoscientica Sinica,ISSN1006-3021,CN11-3474/P,34(5),2013,p.594-602,5 illus.,3 tables,28 refs.)     

MATHEMATICAL GEOLOGY

正20141243Chen Ge(Hangzhou Research Institute of Petroleum Geology,PetroChina,Hangzhou 310023,China);Si Chunsong Study on Sedimentary Numerical Simulation Method of Fan Delta Sand Body(Journal of Geology,     

PROSPECTING EXPLORATION

正20142599Chen Sanming(Guangxi Key Laboratory of Concealed Deposits Exploration,Guilin University of Technology,Guilin541004,China);He Yuzhou Block Model and Reserves Estimation of Panzhihua Iron Deposit Based on 3D Geological Modeling(Journal of Guilin University of Technology,ISSN1674-9057,CN45-1375/N,33(4),2013,p.610-615,9illus.,1table,15refs.)     

STRUCTURAL GEOLOGY

正20140594 Bai Daoyuan(Hunan Institute of Geology Survey,Changsha 410016,China);Zhong Xiang Faults in the Jingzhou Basin and Their Tectonic Settings(Geotectonica et Metallogenia,ISSN1001-1552,CN44-1595/P,37(2),2013,p.173-183,6illus.,59refs.)Key words:basin evolution,tectonic setting,South China In the Upper Paleozoic and Jurassic se-     

STRUCTURAL GEOLOGY

正20141912Cao Hui(State Key Laboratory for Continental Tectonics and Dynamics,Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China)Gravitational Collapse and Folding during Orogenesis:A Comparative Study of FIA Trends and Fold Axial Plane Traces(Geology in China,ISSN1000-3657,CN11-1167/P,40(6),2013,p.1818-1828,9illus.,35refs.,with