全反射X射线荧光光谱法同时测定天然水中多种元素

利用自行研制的有３个反射体的全反射Ｘ射线荧光分析仪,以Ｓｅ作内标,同时测定天然水中的痕量Ｎｉ、Ｃｕ、Ｚｎ、Ｐｂ、Ｒｂ和Ｓｒ。对纳克级元素,方法的检出限为１０－１０～１０－１１ｇ,水样分析结果与无火焰原子吸收法和ＩＣＰＭＳ法相符,精密度好,对纳克级痕量元素测定的ＲＳＤ（ｎ＝５）小于７２％。     

塞曼原子吸收法测定大洋多金属结核中的铜钴镍

报道以ＨＮＯ３－ＨＦ－ＨＣｌＯ４分解多金属结核样品，用日立１８０－８０偏振塞曼原子吸收分光光度计测定Ｃｕ、Ｃｏ和Ｎｉ的方法。试验了介质及共存元素对测定的影响，选择了最佳测定条件。用该法测定了大洋锰结核标准物质中的Ｃｕ、Ｃｏ、Ｎｉ，结果与标准值符合，且方法已应用于大批量样品分析中。对这些标样６次测定的ＲＳＤ分别是Ｃｕ０．４９％￣１．９９％，Ｃｏ１．８６％￣２．６６％，Ｎｉ０．４６％￣１．９６％。     

等离子体发射光谱法测定重晶石中钡铁和硅

重晶石经Ｎａ２ＣＯ３熔融,水浸取,过滤。沉淀经ＨＣｌ溶解后,用电感耦合等离子体发射光谱法同时测定主成分ＢａＳＯ４和次量成分Ｆｅ２Ｏ３以及滤液中的ＳｉＯ２,结果与部颁标准方法符合。方法精密度好,主量组分ＢａＳＯ４测定的ＲＳＤ（ｎ＝６）为０．２４％,次量组分Ｆｅ２Ｏ３和ＳｉＯ２的ＲＳＤ（ｎ＝６）分别是３．６９％和１．４５％。     

X射线荧光光谱法测定大洋多金属结核中多种元素

采用粉末压片和熔融法制样,理论α系数和散射线内标法校正元素间的吸收增强效应,在３０８０Ｅ２型Ｘ射线荧光光谱仪上测定多金属结核中的Ｎａ２Ｏ、ＭｇＯ、Ａｌ２Ｏ３、ＳｉＯ２、Ｐ２Ｏ５、Ｓ、Ｃｌ、Ｋ２Ｏ、ＣａＯ、ＴｉＯ２、Ｖ、Ｃｒ、Ｍｎ、Ｆｅ、Ｃｏ、Ｎｉ、Ｃｕ、Ｚｎ、Ｇａ、Ａｓ、Ｓｅ、Ｂｒ、Ｎｂ、Ｚｒ、Ｙ、Ｒｂ、Ｓｒ、Ｐｂ、Ｂａ、Ｍｏ、Ｔｌ、Ｌａ、Ｃｅ、Ｎｄ、Ｔｈ、Ｕ和Ｗ等３７种组分。方法经大洋多金属结核标准物质分析验证,其分析结果与标准值符合,具有较好的准确度。经１０次重复测定同一样品,方法的精度（ＲＳＤ,ｎ＝１０）：对大多数主、次组分小于１％;其余痕量元素除Ａｓ（９％）、Ｃｒ（６％）和Ｌａ（９％）外,均小于５％。     

电感耦合等离子体发射光谱分析商代原始瓷样

采用Ｌｉ２ＣＯ３－Ｈ３ＢＯ３熔融和ＨＦ－ＨＮＯ３－ＨＣｌＯ４酸分解样品,电感耦合等离子体原子发射光谱法同时测定古陶瓷样品中１８种主,次量元素,讨论了前处理过程中的一些问题,并造反了最佳实验条件。方法经国家一级标准物质验证,测定结果与标准值吻合,大多数元素的ＲＳＤ（ｎ＝１０）〈５％。     

等离子体质谱法快速测定地质样品中的痕量铂族元素和金

１￣５ｇ试样于刚玉坩埚经Ｎａ２Ｏ２熔融分解,王水浸取后蒸发脱水除ＳｉＯ２,碲共常常富集铂族元素和金,用同位素稀释－等离子体质谱法测定Ｒｕ、Ｐｄ、Ｉｆ和Ｐｔ,内标法测定Ｒｈ和Ａｕ。按取样５ｇ计算,方法的测定限小于０．３５ｎｇ／ｇ,经ＣＣＲＭＰ６个铂族元素标样分析验证,其结果与标准值基本吻合,５次平行测定的ＲＳＤ在１．５￣６．５％     

激光采样电感耦合等离子体原子发射光谱法在地质样品测定中的应用

使用ＣＯ２激光器与ＩＣＰ－ＡＥＳ联接，实现了地质样品的固体采样分析，加入一定量的聚三氟氯乙烯，可基本消除样品组成及元素赋存状态的影响，改善了分析结果的准确度。测定了地质样品中的Ｂａ，Ｃｅ，Ｃｕ，Ｃｒ，Ｌａ，Ｍｎ，Ｎｂ，Ｓｃ，Ｓｒ，Ｔｉ，Ｙ，Ｙｂ和Ｚｒ等１４种元素，检出限０．１×１０＾－６至１０×１０＾－６，ＲＳＤ一般在３％－７％，最大为１０％，。     

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。     

色层分离－端视电感耦合等离子体发射光谱法测定高纯氧化铕中稀土杂质元素

对Ｐ５０７萃淋树脂分离稀土元素的条件进行了实验，拟定了以Ｐ５０７萃淋树脂为固定相，ＨＣｌ为流动相分离４Ｎ级荧光材料Ｅｕ＿２Ｏ＿３中１４种稀土杂质元素的流程，使被测杂质与基体Ｅｕ＿２Ｏ＿３达到了较好的分离；再用阳离子交换树脂分离被测液中非稀土杂质元素。选择了端视ＩＣＰ－ＡＥＳ测量稀土杂质元素的最佳条件。称样量５０ｍｇ时各杂质组分的测定下限（ｕｇ／ｇ）为：ＣｅＯ＿２、Ｐｒ＿６Ｏ＿（１１）、Ｎｄ＿２Ｏ＿３、Ｓｍ＿２Ｏ＿３、Ｔｂ＿４Ｏ＿７、Ｈｏ＿２Ｏ＿３、Ｅｒ＿２Ｏ＿３，Ｔｍ＿２Ｏ＿３、Ｌｕ＿２Ｏ＿３０．４，Ｌａ＿２Ｏ＿３、Ｇｄ＿２Ｏ＿３、０．２，Ｄｙ＿２Ｏ＿３、Ｙ＿２Ｏ＿３０．０４，Ｙｂ＿２Ｏ＿３０．０２。６次取样分析，各杂质组分加入量为１０ｕｇ／ｇ（ＣｅＯ＿２为２ｕｇ／ｇ），加入回收率在８４％～１１２％；ＲＳＤ＜１３％。方法可用于纯度在９９．９９％～９９．９９９５％Ｅｕ＿２Ｏ＿３中１４种稀土杂质元素的测定。     

原子吸收法测定大洋沉积物中多种金属元素

应用火焰原子吸收法对大洋沉积物中的Ｆｅ、Ｍｎ、Ｃｕ、Ｃｏ、Ｎｉ、Ｐｂ、Ｚｎ、Ｃａ、Ｍｇ、Ｋ、Ｎａ、Ｃｒ和Ｒｂ１３个元素进行直接测定，对测试工作条件、介质、酸度和共存元素干扰等方面进行了综合考察。各元素测定的ＲＳＤ（ｎ＝１０）≤１２％，经标准物质分析验证，结果与标准值相符，应用此法为待定值大洋沉积物标样ＧＳＭＳ＿２和ＧＳＭＳ＿３提供了定值数据，结果与初定值相符     

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.     

Inter-regional correlation of transgressions and regressions in the Cretaceous period

Well investigated platforms have been selected in each continent, and the history of Cretaceous transgressions and regressions there is concisely reviewed from the available evidence. The factual records have been summarized into a diagram and the timing of the events correlated between distant as well as adjoining areas.On a global scale, major transgressions were stepwise enlarged in space and time from the Neocomian, via Aptian-Albian, to the Late Cretaceous, and the post-Cretaceous regression was very remarkable. Minor cycles of transgression-regression were not always synchronous between different areas. Some of them were, however, nearly synchronous between the areas facing the same ocean.Tectono-eustasy may have been the main cause of the phenomena of transgression-regression, but certain kinds of other tectonic movements which affected even the so-called stable platforms were also responsible for the phenomena. The combined effects of various causes may have been unusual in the Cretaceous, since it was a period of global tectonic activity. The slowing down of this activity followed by readjustments may have been the cause of the global regression at the end of the Cretaceous.     

The lamprophyres of Afyon stratovolcano,western Anatolia,Turkey: description and genesis

The Afyon stratovolcano exhibits lamprophyric rocks, emplaced as hydrovolcanic products, aphanitic lava flows and dyke intrusions, during the final stages of volcanic activity. Most of the Afyon volcanics belong to the silica-saturated alkaline suite, as potassic trachyandesites and trachytes, while the products of the latest activity are lamproitic lamprophyres (jumillite, orendite, verite, fitztroyite) and alkaline lamprophyres (campto-sannaite, sannaite, hyalo-monchiquite, analcime–monchiquite). Afyon lamprophyres exhibit LILE and Zr enrichments, related to mantle metasomatism.     

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.     

NONMETALS DEPOSITS

正20140876 Gao Junbo(College of Resources and Environmental Engineering,Guizhou University,Guiyang 550025,China);Yang Ruidong Study on the Strontium Isotopic Composition of Large Devonian Barite Deposits from Zhenning,Guizhou Province(Geochimica,     

METALS DEPOSITS

正20141470 Chai Lu(Shenyang Institute of Geology and Mineral Resources,CGS,Shenyang110034,China);Zhu Qun Distribution of Significant Metal Mineral Resources the in Adjacent Areas of China,Russia and Mongolia(Geology and Resources,ISSN1671-1947,CN21-1458/P,22(5),2013,p.397-402,2 illus.,3 tables,20 refs.)Key words:metal ores,China,Russia,Mongolia     

GEOPHYSICS

正20141944Bao Hanyong(Research Institute of Exploration and Development,Jianghan Oilfield,SINOPEC,Wuhan 430223,China);Guo Zhanfeng Tectonic-Thermal Evolution of the Subei Basin since the Late Cretaceous(Geological Journal of China Universities,ISSN1006-7493,CN32-1440/P,19(4),     

GEOCHEMISTRY

正20140692 Duo Tianhui(No.402 Geological Team,Exploration of Geology and Mineral Resources of Sichuan Authority,Chengdu611730,China);Wang Yongli Computer Simulation of Neptunium Existing Forms in the Groundwater(Computing Techniques for Geophysical and Geochemical Exploration,ISSN1001-1749,CN51-1242/P,35(3),     

ENVIRONMENTAL GEOLOGY

正20142512Chen Xiaoan(Jiangxi Provincial Research Institute of Soil and Water Conservation,Nanchang 330029,China);Yang Jie Distribution Characteristics and Causes of Collapse Erosion(Journal of Mountain Research,ISSN1008-2786,CN51-1516/P,31(6),2013,p.716-722,2illus.,7tables,14refs.)     

SEISMIC GEOLOGY

正20140644Cao Ying(Earthquake Administration of Yunnan Province,Kunming 650224,China);Wu Xiaoping Research on Structural Stress Field Basing on Focal Mechanism Solutions Data in Sichuan-Yunan Area(Journal of Seismological Research,ISSN1000-0666,CN53-1062/P,36(2),2013,p.165-172,6illus.,2tables,16refs.)