爱辉历史地震考     

关玉辉  孟宪森  陈洪洲  王杰  戴忻志  杨成 《中国地震》2002,18(3):277-282

根据对黑龙江河谷地区本世纪以来地震资料的分析和新构造运动的研究，基本认定诗人所描述的地震是存在的。因此认为，此诗给黑龙江省及其邻近地区的地震活动研究提供了非常珍贵的历史地震资料。  相似文献   

地下水诱发的浅层前兆异常及其机理与有关的地震预报问题(2)   总被引：9，自引：2，他引：9  

王吉易  宋贯一  曹志成  郑云贞  张子广  范雪芳  黄辅琼  杨明波 《华北地震科学》2002,20(3):1-13

分析了现有主要地震前兆模式（包括热物质上涌模式）在解释现实观测到的浅层异常时遇到的困难。论证了金种前兆异常与空间环境因子之间具有的密切成因联系。诱发前兆异常具有7个主要的特征，即种类的多样性、与降水及地下水变化关系的非线性、发生的周期性和季节性、变化的层次性、时间分布的成丛性、空间分布的大区域性以及多种手段异常变化的时空关联性等。  相似文献   

Development Plan of East Unity Oil Field, Sudan, Using Reservoir Simulation Study     

Musa Tagwa A  Ibrahim Ahmed A  Guan Zhenliang 《中国地质大学学报(英文版)》2002,13(3)

Simulation study was applied in the development planning of East Unity oil field, Sudan. A grid consisting of 2 000 cells was constructed. A major challenge of the study was to evolve a full field development and future reservoir management strategy that would ensure maximum recovery of oil based on well Un51. Simulation shows that Un51 as injection well in AradiebaC would yield better oil recovery than to be production well.  相似文献   

Environmental emigration stress of slope farmland in the Three Gorges area     

Wang Liming Ph.D.  Guan Qingfeng  Yang Yanfeng 《地理学报(英文版)》2002,12(4):420-426

The project of ‘grain for green’, to restore woodland and grass by retreating from slope farmland, as a fundamental measure of eco-environmental rehabilitation, is being conducted in the reservoir area of the Three Gorges gradually. However, the de-farming of slope farmland will reduce the amount of farmland in de-farmed areas, especially in the areas with concentrated slope farmland, which would cause the problems of environmental emigration. The people who cannot regain enough farmland by relocating farmlands within village after de-farming and have to emigrate to other places are called environmental emigrants or ecological emigrants. In the research, a de-farming stress index model and an environmental emigration model are developed based on GRID data, and the potential amount of environmental emigration caused by de-farming of slope farmland in the reservoir area is simulated aided with GIS. The simulation indicates that the potential emigration amount caused by de-farming is quite large. When the de-farming stress index reaches 40%, the amount is as large as 890,000 people, which is equivalent to the emigrants caused by the submergence of the Three Gorges reservoir. So it should be considered as a big problem during the eco-environmental rehabilitation in this area. Some suggestions are raised to tackle the problem. Firstly, the emigration plan should be included in the de-farming plan. Secondly, some provinces, especially those located in the lower reaches of the Yangtze River, should accommodate part of the environmental emigrants.  相似文献   

Statistical distribution of surface elevation for the fourth order nonlinear random sea waves     

Changlong Guan  Fu Sun 《中国科学D辑(英文版)》1997,40(6):605-612

Based upon the nonlinear model of random sea waves, the statistical distribution of wave surface elevation exact to the fourth order is derived as the truncated Gram-Charlier series,by calculating directly each order moment. The phenomenon found by Huanget al. that the agreement between observed data and investigated series deteriorates much more when the series is kept to λ₈ is explained. The effect of the approximation order on the truncation of series and the determination of coefficients is investigated. For themth order approximation, the derived series is truncated atH _3m-3 with the absence of H_3m-4, and the coefficients ofH _3m-3 andH _3m-6 are connected by a simple algebraic relation. Project supported by the National Natural Science Foundation of China.  相似文献   

Supergene Geochemistry of Gold and Oxidation Zone of the Sain Us Gold Deposit in the Inner Mongolian Arid Region     

Ma Mintao  Guan Guangyue Department of Chemistry  Environment Engineering  Beijing Polytechnic University  Beijing Geological Department  Northeast University of Technology  Shenyang  Liaoning Fei Zhenbi 《《地质学报》英文版》1997,71(1):58-68

The Sain Us gold deposit is a typical auriferous sulphide quartz vein deposit in the InnerMongolian arid steppe climatic region. The oxidation zone has been controlled by the arid cli-mate since the beginning of the Holocene. Gold supergene evolution is characterized by enlarge-ment of gold grains, complication of the gold form, raising of the gold grade and increase of thegold fineness; besides, gold and silver have two enrichment peaks at the same depth, which is insharp contrast to the unimodal enrichment of gold and silver and the occurrence of gold aboveand silver below in a humid climatic region. Sun pumping is the main cause for the bimodalenrichment of gold and silver. Illite 2 M_1 is one of the main causes for the upper enrichment peakof gold and silver.  相似文献   

胶东招掖金矿带控矿断裂演化规律   总被引：15，自引：0，他引：15       下载免费PDF全文

苗来成  罗镇宽  关康  黄佳展 《地质找矿论丛》1997,12(1):26-35

招掖金矿带金矿床受断裂构造控制的特点十分明显，研究表明这些控矿断裂具有复杂的演化历史，经历过至少四期变形作用，但金矿化主要发生在控矿断裂的张性演化阶段。断裂构造不仅控制着金矿化的时间，而且控制着金矿体的空间分布及产状，同时也控制着金矿化类型。  相似文献   

金矿与花岗岩类关系的“同源说”——以豫西外方山地区为例     

卿敏  陈祥  关连绪 《黄金地质》1997,(3)

以豫西外方山地区为例，阐明了金矿床与燕山期花岗岩类密切的时间、空间和成因关系，建立了金矿与花岗岩类关系的深部岩浆同源成因模式（“同源说”），提出了成矿同源花岗岩体的概念、定量判别标志及其在找矿评价中的应用。  相似文献   

亚洲夏季风结构和变动与大气运动的斜压和正压特征:斜压模分析   总被引：9，自引：1，他引：9  

管兆勇  徐建军  郭品文  王川 《气象学报》1997,55(2):146-153

通过定义流场的斜压性度量参量，利用观测资料，对大气运动的斜压特征量与夏季风变动的联系进行了探讨。结果表明：夏季风流场具有较强的斜压性；纬向气流的斜压强弱的时间变动与夏季风进退相吻合；强斜压区的范围可反映夏季风活动的基本范围。经向斜压运动强弱的水平分布及时间－经度剖面上斜压运动动能的纬向传播都与亚洲季风体系中季风子系统有关  相似文献   

倾斜板体磁异常总梯度模反演方法   总被引：12，自引：0，他引：12       下载免费PDF全文

管志宁  姚长利 《地球科学》1997,22(1):81-85

对于二度体磁异常，其总梯度模具有不受磁化方向影响、表达式简单和具有较强分辨叠加异常的特点，针对顶面倾斜板状体提出的梯度模反演方法，能反演倾斜顶面中心的深度、顶斜面的倾角和宽度等参数。  相似文献