煤系高岭土合成4沸石试验研究

本试验所用原料为大同怀仁和徐州夹河煤系高岭土,这两种原料的ＳｉＯ２和Ａｌ２Ｏ３分子比均接近于２,其成分能满足合成４Ａ沸石的要求。本试验首先进行了原料的焙烧活化及漂白的试验研究,解决了原料的白度问题。分析探讨了合成４Ａ沸石过程中成分、碱度、温度、时间及搅拌等对合成试验的影响,并通过对比试验获得了最佳合成条件,得到了合格的４Ａ沸石产品。     

“偏高岭石—碱—水”体系中4A沸石晶体生长规律及其机理探讨

煅烧高岭土与氢氧化钠的水热反应体系中，偏高岭石不仅为４Ａ沸石的形成提供了物质基础，而且为晶核的形成提供了有利界面。４Ａ沸石的晶核总是优先形成于发生了溶解的偏高岭石表面，而晶体生长的方式则受偏高岭石颗粒大小的影响。随着晶体的大量生长，偏高岭石逐渐消失，与此同时，产生了二次成核作用，晶体在先成的４Ａ沸石晶体表面生长，形成双晶。在整个反应过程中，液相中的［Ａｌ２Ｏ３］及［ＳｉＯ２］浓度的变化与４Ａ沸石晶体生成具有一定对应关系。这表明，偏高岭石不断溶解，固相的Ａｌ２Ｏ３·２ＳｉＯ２不断转化为液相的Ａｌ２Ｏ３和ＳｉＯ２。沸石晶体的生成是以液相各组分浓度的过饱和为动力的，为液相生成机理     

明矾石合成4A沸石的试验研究

以明矾石矿为原料,成功地合成了物理化学性能较好的４Ａ沸石。通过对４Ａ沸石合成的基本原理、工艺条件和主要工作参数的研究,提供了合成４Ａ沸石的新途径,丰富了明矾石矿综合利用的新内容。     

用矿物原料合成4A沸石的工艺条件研究

通过对实验用原料矿物结构的分析，侧重于合成工艺及合成条件等方面的探索，生产出高性能低成本的４Ａ沸石。主要性能指标：钙离子交换率３１５ＣａＣＯ３ｍｇ／ｇ干沸石；相对白度９５；平均粒径３μｍ。     

利用煤矸石合成4A分子筛初探

利用煤矸石经煅烧后在强碱作用下制备成４Ａ分子筛，这一实验室成果对综合利用煤矸石、生产适于洗涤剂配方用的合成沸石分子筛，具有积极的意义。     

用矿物原料合成4A沸石的工艺条件研究

通过对实验用原料矿物结构的分析，侧重于合成工艺及合成条件等方面的探索，生产出高性能低成本的４沸石。主要性能指标：钙离子交换率３１５ＣａＣＯ＿３ｍｇ／ｇ干沸石；相对白度９５；平均粒径３μｍ。     

沸石分子筛合成的X射线衍射研究

采用Ｘ射线粉末衍射物相分析方法,对沸石分子筛的合成工艺进行研究,通过原料来源、焙烧时间、碱浓度、结晶时间等诸多对合成的影响的研究,确定最佳的合成条件。     

皖西霞石正长岩合成沸石分子筛及提钾的实验研究

合成沸石因具有优异的吸附及离子交换性能而备受关注。本实验以皖西地区霞石正长岩为主要原料 ,成功地合成了 13 X型沸石分子筛 ,母液经蒸发、分离 ,制得了白炭黑及碳酸钾 ,表明霞石正长岩具有巨大的潜在综合利用价值。合成沸石、白炭黑和碳酸钾的成分、结构及性能分析表明 ,3种产品均达到了国家或化工行业标准。基于此 ,对工艺技术可行性作了分析评价     

粤西北煤矸石制备4 A。沸石分子筛的工艺实验研究

粤西北煤矸石制备４Ａ。沸石分子筛的工艺实验研究曹俊臣彭金莲冉红彦李本超（中国科学院广州地球化学研究所，广州５１０６４０）关键词煤矸石４Ａ。沸石分子筛工艺实验粤西北采用煤矸石合成４Ａ。分子筛，既可清除污染，又能变废为宝。我们以广东粤西北煤矸石为原料，初...     

广西资源红辉沸石合成4A沸石的工艺研究

初步研究表明，经适当预处理，广西资源红辉沸石可作为合成4A沸石的优质源。通过反复实验，探索出了经济有效的原料预处理与4A沸石合成工艺流程及相关技术参数，既为该地红辉沸石的高层次开发利用开创了新途径，又为4A沸石合成提供了一种来源丰富的新原料。     

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).     

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.)