东天山尾亚复式岩株形成时代讨论   总被引：14，自引：1，他引：14  

李嵩龄  李文铅  冯新昌  董富荣 《新疆地质》2002,20(4):357-359

尾亚复式岩株由尾亚超单元（外环）及环形山超单元（内环）组成。由完全不同成分、不同岩浆源的两个独立岩浆作用，沿同一通道就位的产物。外环为碱性辉长岩、石英正长岩、碱长花岗岩，内环为钙碱系列的石英闪长岩－花岗闪长岩－二长花岗岩－钾长花岗岩。北侧侵入于早石炭世卡拉火大山组及白尖山超单元中。依据同位素年龄测定，其生成年龄270.67-267.3Ma，为早二叠世；环形山超单元生成年龄230－250Ma，为晚二叠世。  相似文献   

Response Surface Designs for Scenario Management and Uncertainty Quantification in Reservoir Production   总被引：1，自引：0，他引：1  

Astrid Jourdan  Isabelle Zabalza-Mezghani 《Mathematical Geology》2004,36(8):965-985

Response surface experimental designs provide a framework for evaluating sensitivities and assessing uncertainties in reservoir-production forecasts for continuous parameters (i.e. permeability, flow rate, etc.). In this paper, the method is extended in order to integrate both continuous and discrete parameters (i.e. fault status: open/close, injection scheme: SWAG/WAG, etc.). This paper presents an appropriate experimental designs approach, notably the regression models associated with, and the statistical interpretation (sensitivity study, Monte Carlo simulations, etc.). The method has been successfully applied to a reservoir oil-production simulation problem. The objective was to define the best production scheme by optimizing the well-completion level. This application has highlighted the advantages of this new approach, both in terms of decreasing simulation cost and improving the interpretation quality.  相似文献   

油气化探异常评价的研究   总被引：4，自引：1，他引：4  

汤玉平  魏巍  李尚刚  丁相玉  刘运黎 《物探与化探》2002,26(2):131-134,139

根据油气化探异常评价的研究方法及其有关问题,指出了选择参数既要具有明确的地质、地化意义,又要符合某种数学原理及最优化准则。据此对异常与背景属性及其确定方法进行了讨论。概述了油气异常判识准则。强调了组构异常及变量之间的相关性或关联信息提取的重要性。  相似文献   

复合地基承载特性的数值分析研究          下载免费PDF全文

李小青  薛林华  黄文涛 《探矿工程》2002,(5):7-9

采用三维有限元法进行复合地基承载特性的数值分析研究，首先分析一般单桩和复合地基中单桩的荷载传递特性，然后研究群桩效应中桩侧摩阻力、桩顶应力及桩身附加应力分布规律与特点，为复合地基的定量设计提供理论依据。  相似文献   

组合钢支撑在隧洞塌方处理中的应用     

雷锋  孟华 《四川地质学报》2002,22(Z1):29-30

介绍了组合钢支撑技术在石棉镇龙电站隧洞塌方中的应用情况，同时探索出了该项技术的适用条件和推广前景。  相似文献   

在准两年尺度上ENS0与亚洲季风相互作用的研究   总被引：5，自引：4，他引：5  

邹力  吴爱明  倪允琪 《热带气象学报》2002,18(1):19-28

对ENSO过程中的准两年振荡进行了诊断分析，并在此基础上分析了ENSO与亚洲季风的相互作用，结果表明：在准两年尺度上亚洲季风对ENSO循环有着十分明显的影响，这种影响主要通过亚洲季风爆发南下到热带西太平洋，激发出那里的强对流，进而影响到ENSO循环，这种现象不仅仅反映在准两年模态中，在实际亚洲冬季风的年限变化中也较突出。  相似文献   

CFG桩复合地基承载性状的实验研究   总被引：15，自引：0，他引：15  

潘纪顺  刘志伟等 《地质与勘探》2001,37(4):92-94

通过CFG桩复合地基载荷试验和桩土应力比试验的研究，探讨了CFG桩复合地基承载特性。  相似文献   

Evidence for induced seismicity in the vicinity of Fierza reservoir,Northern Albania   总被引：1，自引：0，他引：1  

Betim Muço 《Pure and Applied Geophysics》1991,136(2-3):265-279

The reservoir of Fierza on the Drini River, Northern Albania, is Albania's largest reservoir and it is one of the world's largest reservoirs of high dams (reservoir volume at maximum water level, 2.8 * 10⁹ m³; dam height, 167 m and dam capacity 8 * 10⁶ m³). We compare pre-and postimpounding seismicity of the area surrounding the Fierza reservoir. An increase of seismic microactivity was observed after the impounding of the reservoir. More than 300 microearthquakes, occurred in the immediate vicinity of the main body of the reservoir, with local magnitude ranging between 1.3 and 3.6. A significant change of theb value in the magnitude-frequency relationship was observed. One swarm of microtremors occurred in the northern part of the reservoir on April 4–5, 1981, where an alteration of the tensor of natural tectonic stresses is revealed. The theoretical additional stress and displacement induced by water-load in the bank of the reservoir were estimated for four cross-profiles of the reservoir area and the maximum values resulted near the location of the above swarm.  相似文献   

Geological - Geophysical - Geochemical Exploration Models of Copper - Iron Deposits in Southeastern Hubei1     

Guo Xuequan 《《地质学报》英文版》1994,7(3):299-309

Abstract This paper discusses geological - geophysical - geochemical models of such typical deposits as the Tieshan - type Fe-Cu deposit, the Tonglushan - type Cu - Fe deposit, the Yehuaxiang - type Cu deposit, the Jiguanzui-type Cu - Au deposit, and the Tongshankou - type Cu(Mo) deposit. The models were established based on practical data of the polymetallic deposits dominated by copper ore in southeastern Hubei. These models, which are graphically illustrated in the paper, systematically summarize the metallogenic geological conditions and the geophysical-geochemical characteristics of copper deposits in this area. The models are of practical significance for studying copper deposits, predicting mineral resources, choosing exploration methods, and searching for ore deposits based on existing ones in the study area.  相似文献   

中国北东部构造活化和金成矿作用     

王木清 《铀矿地质》1987,(4)

中国北东部的金矿床具有多因复成特点。大地构造发展阶段的“活动期”是金成矿的有利时期。后一阶段继承并改造前一阶段的金矿床或矿源层,使之形成新的金矿。这个地区金的成矿期主要有两个:一是晚太古-早元古代(前震旦纪结晶基底层中);一是中新生代(地洼构造层)。金矿床主要分布在地洼区四级单元——地穹或地穹与后地洼交接带或地洼区的更次一级正单元中。  相似文献