海洋锰结核中微量铀的测定

样品用王水溶矿，制成１０％ＨＮＯ３溶液，通过Ｐ－３５０色谱柱，富集铀分离干扰元素，而后用０．２％ＮａＦ解脱铀，衔接５－Ｂｒ－ＰＡＤＡＰ光度法测定铀。     

TritonX-100－5-Br-PADAP光度法测定铜和镍

研究了非离子型表面活性剂Ｔｒｉｔｏｎ Ｘ－ １００ 存在下,用５ － Ｂｒ － ＰＡＤＡＰ 光度法测定铜、镍的方法。结果表明：在ｐＨ９ ．０ 的硼砂缓冲介质中,５ － Ｂｒ － ＰＡＤＡＰ 与铜和镍生成紫红色络合物,λＣｕｍ ａｘ ＝ ５７５ ｎｍ ,εＣｕ ＝ １ ．０４ ×１０５ Ｌ·ｍｏｌ－ １·ｃｍ － １ ;λＮｉｍ ａｘ ＝ ５７５ ｎｍ ,εＮｉ ＝ １ ．１４ ×１０５ Ｌ·ｍｏｌ－ １·ｃｍ － １ 。铜和镍的质量浓度分别在０ ～５６０ μｇ／ Ｌ和０ ～４４０ μｇ／ Ｌ符合比尔定律。加入六偏磷酸钠后,由于偏磷酸镍的形成,镍不再与５ － Ｂｒ － ＰＡＤＡＰ 显色,可通过铜及铜镍总量的测定,计算出镍的含量。用该方法实测了钢样中铜和镍的含量,结果与推荐值相符,对铜和镍５ 次测定的ＲＳＤ均小于５ ％ 。     

GEOLOGICAL EVIDENCE OF MU US DESERT EVO-LUTION SINCE 0.5MAB.P.

ＧＥＯＬＯＧＩＣＡＬＥＶＩＤＥＮＣＥＯＦＭＵＵＳＤＥＳＥＲＴＶＯ－ＬＵＴＩＯＮＳＩＮＣＥ０．５ＭＡＢ．Ｐ．TXＧＥＯＬＯＧＩＣＡＬＥＶＩＤＥＮＣＥＯＦＭＵＵＳＤＥＳＥＲＴＥＶＯ┐ＬＵＴＩＯＮＳＩＮＣＥ０．５ＭＡＢ．Ｐ．ＳｕｎＪｉｍｉｎ，ＤｉｎｇＺｈｏｎ...     

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％。     

2—（5—溴—2—吡啶偶氮）—5—二甲氨基苯胺与铂显色反应的研究及应用

研究了显色剂２（５溴２吡啶偶氮）５二甲氨基苯胺（５ＢｒＰＡＤＭＡ）与Ｐｔ（Ⅱ）的显色反应。结果表明,在乙醇存在下,１０～３２ｍｏｌ／ＬＨ３ＰＯ４介质中,试剂与Ｐｔ（Ⅱ）１５ｍｉｎ即形成稳定的紫蓝色配合物,并至少稳定２４ｈ。该配合物的最大吸收波长位于６２８ｎｍ处,表观摩尔吸光系数为８７３×１０４Ｌ·ｍｏｌ－１·ｃｍ－１,其组成为ｎＰｔ（Ⅱ）∶ｎ５ＢｒＰＡＤＭＡ＝１∶１,Ｐｔ（Ⅱ）的质量浓度在０～１０ｍｇ／Ｌ符合比尔定律。所拟方法用于二次合金管理样及催化剂中铂的直接测定,结果与推荐值相符,精密度好,ＲＳＤ＜０．５％（ｎ＝６）。     

松辽盆地嫩江组白云岩结核的成因及其环境意义

松辽白垩纪陆相盆地嫩江组泥质铁白云岩结核主要呈顺层状产于灰绿色粉砂质泥岩、页岩与介形虫层的互层层序中。其同位素组成δ１３Ｃ（ＰＤＢ）＝１．１０５±２．４，δ１８Ｏ（ＰＤＢ）＝－５．１７４±３．５，８７Ｓｒ／８６Ｓｒ＝０．７０７８±０．０００５。结核多不切割层理，结核内部具水平纹理。该类结核形成于湖平面快速波动过程中的浅水期，属沉积结核和早期成岩结核，椭圆状外形是碳酸盐同生胶结过程中始终受到上覆泥质沉积物持续压实作用的结果。白云岩为海水－淡水混合成因     

TritonX—100—5—Br—PADAP光度法测定铜和镍

研究了非离子型表面活性剂ＴｒｉｔｏｎＸ－１００存在下,用５－Ｂｒ－ＰＡＤＡＰ光度法测定铜镍的方法。结果表明：在ＰＨ９．０的硼砂缓冲介质中,５－Ｂｒ－ＰＡＤＡＰ与铜和镍生成紫红色络合物,λｍａｘ＾Ｃｕ＝５７５ｎｍ,εＣｕ＝１．０４×１０＾５Ｌ·ｍｏｌ＾－１·ｃｍ＾－１,λｍａｘ＾Ｎｉ＝５７５ｎｍ,εＮｉ＝１．１４×１０＾５Ｌ·ｍｏｌ＾－１·ｎｍ＾－１。铜和镍的质量浓度分别在０￣５６０μｇ／Ｌ和０￣５     

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％。     

钪－4，5－二溴苯基荧光酮－CTMAB－吐温－60多元配合物的分光光度法研究

研究结果表明，在混合表面活性剂ＣＴＭＡＢ－吐温－６０存在下的ｐＨ５．７～６．５的缓冲介质中，Ｓｃ（Ⅲ）与４，５－二溴苯基荧光酮（ＤＢＰＦ）形成高灵敏的多元配合物，其ε＿（５９０）＝２．２６×１０￣５Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１），组成比为：Ｓｃ：ＤＢＰＦ：ＣＴＭＡＢ＝１：２：４。采用混合表面活性剂使增溶增敏作用更为显著，并加速了显色反应，增强了配合物的稳定性。而Ｎａ＿２ＳＯ＿４的加入能显著地提高体系的灵敏度。Ｓｃ量在０～０．３６ｕｇ／ｍｌ范围内遵守比尔定律。方法可直接测定合成混合稀土中的Ｓｃ，回收率在９８％～１０５％；结合沉淀分离和ＰＭＢＰ萃取分离，实现了地质试样中痕量Ｓｃ的测定。     

5—Br—PADAP分光光度法测定多金属结核中的铌

报道了用单宁＿硅酸钠＿动物胶沉淀分离多金属结核中的Ｍｎ、Ｃｏ、Ｆｅ、Ｓｉ等干扰组分，然后用５＿Ｂｒ＿ＰＡＤＡＰ分光光度法在水相中测定Ｎｂ；讨论和解决了Ｎｂ的结果偏低问题。方法应用于新研制的大洋多金属结核ＧＳＰＮ＿２和ＧＳＰＮ＿３中Ｎｂ的定值测定，结果与初定值相符，其ＲＳＤ（ｎ＝７）分别为２０１％和３２２％。     

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