英安流纹质岩浆的熔离实验

该实验用江西相山英安流纹岩加一定量的氟化物作为初始材料。在温度达875～900℃、压力0.5×10~8～1.0×10~8Pa时,含F和H_2O的英安流纹质岩浆的淬火产物中,有两种玻璃生成。其中一种玻璃呈小球出现,其成分相对富FeO、MgO、TiO_2。另一种玻璃,分布于小球之间,相对富SiO_2和Al_2O_3。实验表明,富含挥发分的酸性火山岩浆是比较容易熔离的。在流纹质火山岩中常见的长英质条带大多数不是浆屑,而是流纹质岩浆熔离的产物。     

An SIMS Study on the Fingerprint Characteristics of Minerais with Special Reference to Minerais from the Jinningian Granites in the Yunnan Sector of the Xikang-Yunnan Axis

Abstract In this paper such minerais as apatite, zircon and biotite from granites were determined and analyzed by secondary ion mass spectrometry (SIMS) for their isotopic ages, REE composition, trace elements and volatile components with an attempt to shed light on the origin and formation environments of the Jinningian granites in the Yunnan sector of the Kangdian (Xikang- Yunnan) earth's axis. The results show that the apatites, zircons and biotites of different geneses possess different fingerprint characteristics. Some correlations have been found between trace elements and volatile components contained in the minerais from granties.     

资源最优空间配置的系统经济理论研究

本文不仅研究了包括生产、消费、资源的空间配置和空间位置差异的一般经济均衡条件,而且还以大系统多级递阶控制原理,建立了统一协调的系统经济数学模型。该模型深刻地揭示了生产、消费、资源的空间配置与空间位置差异之间的相互关系,同时也是区位论的一种理论模式。     

海原断层系的分形研究

本文根据Okubo等人测量圣安德烈斯断层系所用的复盖维数法,对海原断层系进行了分形测量,求出海原断层系的整体维数D_0=1.137,其景泰段D_0=1.109,海原段D_0=1.182。计算中未得到邵家水段和李使堡段的分维数。此外,文中还着重探讨了断层几何与地震活动性及其力学环境的关系,进一步证明了自相似断层的几何复杂性与地震活动密切相关,剪切断裂带具较低分维数(1.1—1.3),而在张性环境中形成的断裂体系具较高的分维数(1.5—1.6)。最后本文讨论了断层迹线图等因素对分形测量精度的影响。     

灵台-阿木去乎剖面地壳速度结构

在Ⅰ测线观测资料的基础上,本文结合测区特点给出了高程校正及沉积层校正方法,利用反射波与莫霍面折射波运动学特性进行一维、二维地壳结构的正、反演计算,获得了自甘肃夏河至灵台460公里范围内的分层地壳结构,认为西部地壳厚度约51公里,东部仅为44公里,已属鄂尔多斯地台区结构,与地槽区的分界线大致对应地表陇县固关镇。武山与张家川之间在15-20公里深处存在低速层。结合地震波的动力学特性,可判定本测线通过的超壳断层有鄂尔多斯西缘-六盘山断裂、西秦岭北缘断裂和武山南北向断裂。     

多元正态总体假设检验在矿化带识别中的应用

根据北瓦地区岩心样品的地球化学数据处理结果,介绍多元正态总体假设检验方法与对应分析相结合在该区铅锌矿化带识别中的应用。从全体数据的对应分析结果出发,将见矿钻孔的样品得分值经稳健处理后作为铅锌矿化带的已知样本,并以马氏距离为统计量对未见矿钻孔的样品进行识别,在一定信度下作出了该区已知铅锌矿化带在深部存在较有意义延伸的统计推断。     

黔南桂北下三叠统碳酸盐海岸—陆架沉积总体的沉积构成及沉积过程分析

在黔南桂北下三叠统进行沉积过程和沉积构成分析的基础上,识别出了构成碳酸盐海岸—陆架沉积总体的4种成因单位和7种沉积相。同时本文还对碳酸盐海岸—陆架沉积总体的演化过程及其与其它沉积总体的空间组合关系进行了讨论。     

EFFECTS OF ANOMALOUS HEATING ON SUMMER MONSOON OVER ASIA*

Based on a zonally non-uniform mean circulation in summer simulated by numerical modelling,perturbation heatings ever South Asia and a perturbation cooling over Northwest Australia were incorporated in a numerical model to discuss their effects on summer monsoon over Asia and the structure of flow disturbance.     

An observational study of the 30–50 day atmospheric oscillations part II: Temporal evolution and hemispheric interaction across the equator

In this part, the temporal evolution and interaction across the equator of 30-50 day oscillation in the atmosphere are investigated further. The annual variation of 30-50 day oscillation is quite obvious in the mid-high latitudes. In the tropical atmosphere, the obvious interannual variation is an important property for temporal evolution of 30-50 day oscillation. The low-frequency wavetrain across the equator over the central Pacific and central Atlantic area, the movement of the long-lived low-frequency system across the equator and the meridional wind component across the equator will obviously show the interaction of 30-50 day oscillation in the atmosphere across the equator.