路基边坡坡度设计的新方法

通过力学分析,导出了砂类土边坡坡度取值的解析公式,建立了直接由解析公式确定边坡坡度的新方法--公式法.在与现行规范法对比的基础上,阐明了公式法的实用价值.     

从HgS—NaCl—HCl—H_2O体系的热力学分析探讨辰砂以氯汞络合物运移成矿所需的物理化学条件

通过对HgS—NaCl—HCl—H2O体系的热力学分析,根据J.O.Nriagu和H.C.Helgeson提出的浓氯化钠溶液中重金属硫化物溶解度的近似计算公式,本文进行了25℃到200℃的有关条件下辰砂作为氯汞(Ⅱ)络合物的溶解度的近似计算。同时,根据笔者推导的反映热液Fh和重金属硫化物溶解度关系的类似公式。近似地计算了给定条件下,辰砂溶解度达成矿意义的浓度时的Eh下限。讨论了辰砂作为氯汞(Ⅱ)络合物运移和成矿所需的物理化学条件。进行了有关条件下辰砂溶解作用的初步试验,结果和热力学分析基本一致。     

球面方模板地形改正公式及其应用

在给出球面圆盘重力公式的基础上,导出了便于使用高程数据库和电子计算机的球面方盘重力公式,通过实际算例,证明了该公式高精度和可用性.     

双层越流系统内圆形开采区变流量非稳定流计算公式的探讨

近些年来,关于越流系统内地下水不稳定流计算已引起国内外广大的水文地质工作者和数学工作者的注意。M.S.汉土什、O.E.雅各布,S.W.纽曼与威瑟斯庞等人相继导出第一、第二和第三类单井抽水不稳定流的计算公式。M.S.汉土什1967年导出的在无越流补给系统内,圆形开采区地下水不稳定流的计算公式。而对多层越流系统内圆形开采区地下水不稳定流的计算问题研究得很少。本文导出了:(1)双层越流系统内圆形开采区变流量的一般计算公式,并在这基础上导出了双层越流系统内圆形开采区阶梯流量的公式,推广了M.S.汉土什1967年所得到的无越流补给的计算公式;(2)时间较长时的渐近公式;(3)越流补给量的一般公式;(4)长时期内较简单的越流补给量的计算公式。     

起伏地形上规则二度体复重磁场正演和直接反演

上接119页 9 反演方法推导中的有关公式 为了对复场展开式作简化表示,将会多次用到2个递推公式,这里预先导出.     

两种用于确定磁异常座标原点的公式

利用剖面上磁异常点的座标关系,可以导出用以确定斜磁化规则体磁异常座标原点的公式.下面介绍两种公式. 公式推导由剖面上四个磁异常点的座标x_1,x_2,x_1',     

对绳索取心钻进台月效率及合理孔深问题的探讨

通过对绳索取心钻探台月效率的公式推导,分析了台月效率随打捞间隔、提钻间隔和小时效率的提高而提高的趋势;同时还推导出计算绳索取心钻进合理孔深的理论公式,并有所验证.     

晶体点阵参数最小二乘法计算程序

作者以最小二乘法理法导出了晶体点阵参数计算的公式,并顾及了X射线粉晶衍射图测定所引起的系统误差修正,从而得到点阵参数的最佳估值。以导出的公式为数学模型编制了PC-1500微机的扩展BASIC语言程序,可适用于各晶系点阵参数的计算,使用方便。     

二度规则磁性体的通用解释法

利用二度磁性体复变函数表达式,导出通用的解释公式,为求解各种二度体的反演问题提供一条捷径.     

多孔介质孔隙率与体积模量的关系

用两相等效体的概念,根据Walsh公式和球形孔隙的弹性公式导出了多孔介质的孔隙率和体积模量之间的近似公式和精确公式,近似关系式不适用于较大的孔隙率。精确公式可以较好的适用于较大孔隙率。试验结果表明,精确公式能够很好地表达多孔介质孔隙率与体积模量之间的关系。     

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