原子荧光光谱法快速测定锌精矿中汞,砷,锑

研究拟定了不经分离富集,直接测定锌精矿中Ｈｇ、Ａｓ、Ｓｂ的原子荧光光谱法。适用于锌精矿中０￣０．１２５％的Ｈｇ;０￣０．５％的Ａｓ及０￣０．１％的Ｓｂ的测定,方法简便、快速,结果令人满意。     

微晶萘—双十二烷基二硫代乙酰二胺吸附显色连续测定铂和钯

微晶萘－双十二烷基二硫代乙酰二胺（ＤＤＯ）吸附显色剂与铂（Ⅱ）、钯（Ⅱ）卤络合物所形成的有色螯合物沉淀，经分离洗涤后分别溶于氯仿－石油醚混合溶剂中，于５１０ｎｍ和４４５ｎｍ处测定铂和钯螯合物的吸光度，在１０ｍＬ的ＣＨＣｌ３－石油醚中０￣１０μｇＰｔ及Ｐｄ均符合比尔定律。采用在铜镍矿基体中标准加入法检验所拟方法，钯的回收率为９３．３％￣１０６．７％，铂为９０％￣１０６％。     

4l0哌啶树脂分离富集－原子吸收测定化探样品中痕量镉

研究了４１０哌啶树脂对Ｃｄ的吸附行为，在２％～２０％ＨＣＩ介质中［ＣｄＣｌ＿３］￣－被树脂吸附，采用４％～３０／ＨＮＯ＿３溶液可以解脱Ｃｄ，回收率在９６％以上。测定了Ｃｄ在该树脂上的分配系数为５４９０，对含Ｃｄ０．０６７μｇ／ｇ的标样ＧＳＲ－３平行测定６次，相对标准偏差为９．５％。方法用于化探样品中０．０Ｘ×１０￣－６级Ｃｄ的测定，结果满意。     

安徽沙溪斑岩铜矿床成矿流体演化及分布规律

对安徽沙溪斑岩铜矿床流体包裹体进行了详细研究，得到气液包裹体的均一化温度为１００￣５００℃，盐度为２．０ｗｔ％￣６０ｗｔ％ＮａＣｌ，并且流体包裹体的成分和温度随时间、空间变化而呈现出一定的变化规律。对热液脉石英及其流体包裹体中Ｈ２Ｏ、ＣＯ２的氧、氢、碳同位素组成分别进行了测定，得到热液δ＾１８ＯＳＭＯＷ为＋３．５１‰￣＋５．５２‰，δＤＳＭＯＷ为－６０‰￣－８２‰，δ＾１３ＣＰＤＢ为－３．６１‰￣     

湖北宜昌虎亭白土的性质和用途

疏松多孔、固结程度低的虎亭白土，属火山碎屑沉积岩。湿法选矿膨润土的产率为２８％￣３５％，蒙脱石含量８０％左右（二次精矿可达９０％以上），可生产优质膨润土，用作涂料，陶瓷和冶金球团的原料，铸造用砂的胶结剂，污水处理的吸附剂，牲畜饲料添加剂等。     

澜沧铅锌银铜矿床矿物包裹体及成矿物化条件的研究

矿物流体包裹体的研究表明，澜沧铅锌银铜矿床成矿流体的温度为１６０￣３５０℃，压力６９０００ｋＰａ，盐度４．６￣１７．０ＮａＣｌｗｔ％，密度０．８５￣１．０ｇ／ｃｍ＾３，ｆｓ２１０＾－９．３￣１０＾－１１．０Ｐａ，ｆｏ２１０＾－３５￣１０＾－３７Ｐａ，Ｐｈ值５．１￣５．７。成矿元素主要以氯化物络合物的形式迁移、温度降低，ｆｓ２和ｐＨ值的升高是引起矿物质沉淀的主要因素。     

湖南临澧县白土坡膨润土特征及开发应用初探

白土坡膨润土产于第四系下更新统中,矿层稳定、厚度较大,为钙基膨润土,主要矿物成分为蒙脱石,含量３５．７￣４６．８％,其他矿物有石英、高岭石等。矿石中Ｆｅ２Ｏ３含量为５．７２￣６．５１％,白度为２６．５￣３４％。原 工艺技术性能达到铸用膨润土工业指标要求。初步提纯后蒙脱一达５５．２￣６９．３％,钠化处理后湿压强度 为０．１８ｋｇｆ／ｃｍ＾２￣０．２７ｋｇｆ／ｃｍ＾２,热湿拉强 １７．８ｇｆ／ｃｍ＾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％。     

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％。     

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。     

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.     

Late Wuchiapingian (Late Dzhulfian,early Late Permian) limestone olistolites within the Tertiary flysch of Glypia Unit (Mount Parnon,central–eastern Peloponnesus,Greece)

Some olistolites reworked in a Tertiary flysch of Mount Parnon (Peloponnesus, Greece) exhibit a Late Permian assemblage, dominated by Paradunbarula (Shindella) shindensis, Hemigordiopsis cf. luquensis and Colaniella aff. minima. This association corresponds to the Late Wuchiapingian (=Late Dzhulfian), a substage whose algae and foraminifera are generally little known. Contemporaneous limestones crop out in the middle part of the Episkopi Formation in Hydra, but they are rather commonly reworked in Mesozoic and Cainozoic sequences. The palaeobiogeographical affinities shared by the foraminiferal markers of Greece, southeastern Pamir, and southern China, are very strong (up to the specific level), and are congruent with the Pangea B reconstructions. To cite this article: E. Skourtsos et al., C. R. Geoscience 334 (2002) 925–931.     

PALEONTOLOGY

正20141596 Liu Yunhuan(School of Earth Sciences and Resources,Chang’an University,Xi’an 710054,China);Shao Tiequan Early Cambrian Quadrapyrgites Fossils of Xixiang Boita in Southern Shaanxi Province(Journal of Earth Sciences and Environment,ISSN1672-6561,CN61-1423/P,35(3),2013,p.39-43,3 illus.,20 refs.)     

GEOCHEMICAL EXPLORATION

正20141719 Chen Zhijun(State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Wuhan 430074,China);Chen Jianguo Automated Batch Mapping Solution for Serial Maps:A Case Study of Exploration Geochemistry Maps(Journal of Geology,ISSN1674-3636,CN32-1796/P,37(3),2013,p.456-464,2 illus.,2 tables,10 refs.)     

MICROPALAEONTOLOGY

正20140962 Chen Fenning(Xi’an Institute of Geology and Mineral Resources,Xi’an710054,China);Chen Ruiming Late Miocene-Early Pleistocene Ostracoda Fauna of Gyirong Basin,Southern Tibet(Acta Geologica Sinica,ISSN0001-5717,CN11-1951/P,87(6),2013,p.872-886,6illus.,56refs.)     

PETROLOGY

正1.IGNEOUS PETROLOGY20142008Cai Jinhui(Wuhan Center,China Geological Survey,Wuhan 430205,China);Liu Wei Zircon U-Pb Geochronology and Mineralization Significance of Granodiorites from Fuzichong Pb-Zn Deposit,Guangxi,South China(Geology and Mineral Resources of South China,ISSN1007-3701,CN42-1417/P,29(4),2013,p.271-281,7illus.,     

ENVIRONMENTAL GEOLOGY

正20141205Cheng Weiming(State Key Laboratory of Resources and Environmental Information System,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China);Xia Yao Regional Hazard Assessment of Disaster Environment for Debris Flows:Taking Jundu Mountain,Beijing as an     

PROSPECTING EXPLORATION

正20141266Fan Chaoyan(Guangdong Provincial Key Laboratory of Mineral Resources and Geological Processes,Guangzhou 510275,China);Wang Zhenghai On Error Analysis and Correction Method of Measured Strata Section with Wire Projection Method(Journal of