Reef-controlled Mineral Deposits in Southern China

Reef-controlled mineral deposits in southern China are divided into three types in this paper based on the relative importance of organic reefs in the ore-forming processes; they are: the direct type, indirect type, and passive type. The case histories of several typical deposits are discussed. In studying reef-controlled deposits, more attention should be paid to the function of synsedimentary faults in reef construction and mineralization and the importance of oil-gas palaeoreservoirs in reef rocks for the formation of sulfide deposits, in addition to analysing the favourable sedimentary facies of mineralization.     

PC—1500A型微型计算机在金的光谱分析中的应用

本文阐明BASIC语言编写程序,将光谱分析法测定金所得的分析数据输入计算机,可由计算机打印出样品的分析线黑度、内标线黑度、金的含量等分析结果和数据,方法经实际应用,证明简便、快速,而且十分可靠。     

On the generation and maintenance of atmospheric disturbances

Blocking is one of the intensive atmospheric disturbances which can maintain for a long time. In this paprer we investigate the general conditions favorable for the generation and maintenance of the intensive disturbances. First, the evolutional process of disturbances superimposed on a jet-like zonal flow is studied by using the wave-packet representation and the WKBJ method. Second, the mechanism for generation and maintenance of disturbances is investigated by using the nonlinear equations and the general physical laws. Finally, some numerical experiments are given for illustration, showing the rapid absorption of disturbances by the jet-like zonal flow in one case and the maintenance of disturbances for a long time in the other case.     

新疆库木库里盆地沉积特征及其找矿远景

在1：25万区域地质调查和矿产资源评价工作中，通过对新疆库木库里盆地地层层序、岩石、沉积物粒度分布、沉积构造、古生物特征的研究，识别出冲积扇、三角洲、湖泊三种沉积相。认为本区是寻找砂(砾)岩型铜矿、油气、岩盐、石膏等与沉积有关矿产的远景地区。     

PRELIMINARY DISCUSSION ON METALLOGENESIS OF LANCANGJIANG RIVER TRANSITIONAL FIELD TECTONIC ZONE IN WESTERN YUNNAN

1 Concept of transitional field tectono-metallogenesis On the basis of preliminary systemical elucidating the concept of crustobody, while making ahistoristic-dynamic integrated metallogenetic analysis of the relation of the mantle creep-flow andgeothermal energy coacervation-diffusion alternation as the deep dynamic source and mechanismto the evolution and movement of crustobodies (including intrabody and interbody), Chen Guodaproposed the technical terms of transitional field tectono-met…     

南方夏秋干旱期间的天气气候特征

对40多年来南方的天气气候特征进行了分析,提出了7～9月夏秋干旱期形成干旱的主要天气系统为西太平洋副热带高压.从干燥度和降水的空间分布综合分析,得出了南方最旱区位于湖南、江西中部.广西、贵州、湖南西北和东南山区、江西南部山区、安徽南部山区、福建-浙江沿海交界山区和苏北沿海为湿润区,人工增雨潜力较大.特殊地形所形成的焚风效应是形成湘中干旱不可忽略的原因.为南方夏秋期间对流云降水潜力研究和科学实施人工增雨作业提供一定依据.     

1：25万地图数据库更新中遥感影像的处理方法

卫星遥感影像已成为快速补充与更新地理信息的主要方法，以对1：25万地图数据库的更新为例，研究遥感影像选择预处理与变换定位的方法。     

GIS与Oracle数据库空间数据格式的转换

MAPGIS软件支持多种GIS数据交换，且其明码数据格式较全面、清晰，易于读写。本文以MAPGIS明码数据格式和Oracle数据库为例，研究通过编程实现ASCII码格式的空间数据上载Oracle Spatial数据库的方法，探讨各类GIS软件与Oracle Spatial进行空间数据交换的基本过程。     

业务流程个性化和可视化的实现

引入面向对象设计的思想，提出了业务流程组件的概念，通过通用的业务流程组件的建模，并将其参数化而使得业务流程平台成为根据用户权限而可以自由进行可视化组装的工作平台。设计了新的会商流程，实现了天气预报会商的多媒体化，同时输出多媒体的天气预报幻灯片，作为台站之间交流的信息产品。     

40Ar/39Ar and Rb-Sr isochron dating of the gold deposits on northern margin of the Jiaolai Basin, Shandong, China

The Pengjiakuang, Dazhuangzi and Fayunkuang gold deposits, located on the northern margin of the Mesozoic Jiaolai Basin, east of Shandong Province, are controlled by a low-angle normal fault. Gold ores are typically brecciated, veinlet and disseminated. The Ar-Ar and Rb-Sr isochron dating methods were adopted to date ores and lamprophyre dike. The results indicate that the age of the Pengjiakuang gold deposit is 117.33–118.42 Ma, that of the Dazhuangzi gold deposit is 117.39 Ma, and that of the Fayunkuang gold deposit is (128.49±7.2) Ma. The consistency in metallogenic age between the gold deposits on the margin of the Jiaolai Basin and the gold deposits (115–126 Ma) of the northern uplift area suggests that both were formed in the same metallogenic period. That is to say, the large-scale metallogeny of the Jiaodong region took place in late-Yanshannian ((120±10) Ma).