地学“开合律”及其在造山带研究中的意义   总被引：14，自引：2，他引：12  

杨巍然 《地质科技情报》1992,11(3):5-9

“开合律”是地学辩证法基本规律之一。本文概述了它的内容与特点,阐明它在造山带研究中的意义及运用它指导造山带研究的步骤,并根据目前已总结的5种“开”、“合”类型相应地提出了5种造山带类型。  相似文献   

Atténuation de l'intensité macrosismique pour la France métropolitaine : importance de l'intensité épicentrale     

Pierre Arroucau  Antoine Mocquet  Pierre Vacher 《Comptes Rendus Geoscience》2006,338(9):596-605

The main result of this work is to show that macroseismic intensity decay with distance strongly depends on the epicentral intensity. An attenuation law that takes this parameter into account is proposed for Metropolitan France, from the analysis of SISFRANCE macroseismic database. Such a model significantly reduces the difference between observed and theoretical intensities. A map of the attenuation variations is also set up for Metropolitan France. No major site effects are observed, but at a broad scale, young Alpine regions display a stronger attenuation than old Hercynian regions. To cite this article: P. Arroucau et al., C. R. Geoscience 338 (2006).  相似文献   

Early Estimation of Seismic Hazard for Strong Earthquakes in Taiwan   总被引：1，自引：0，他引：1  

Wen-Yu Jean  Yu-Wen Chang  Kuo-Liang Wen  Chin-Hsiung Loh 《Natural Hazards》2006,37(1-2):39-53

A shakemap system providing rapid estimates of strong ground shaking could be useful for emergency response providers in a damaging earthquake. A hybrid procedure, which combines site-dependent ground motion prediction models and the limited observations of the Real-Time Digital stream output system (RTD system operated by Central Weather Bureau, CWB), was set up to provide a high-resolution shakemap in a near-real-time manner after damaging earthquakes in Taiwan. One of the main factors that affect the result of ground motion prediction analysis is the existence of site effects. The purpose of this paper is to investigate the local site effects and their influence in the ground shaking and then establish an early estimation procedure of potential hazard for damaging earthquakes. Based on the attenuation law, the site effects of each TSMIP station are discussed in terms of a bias function that is site and intensity-level dependent function. The standard deviation of the site-dependent ground motion prediction model can be significantly reduced. The nonlinear behavior of ground soil is automatically taken into account in the intensity-level dependent bias function. Both the PGA and the spectral acceleration are studied in this study. Based on the RTD data, event correctors are calculated and applied to precisely estimate the shakemap of damaging earthquakes for emergency response.  相似文献   

渤海湾盆地北部奥陶纪岩相古地理   总被引：8，自引：0，他引：8  

金振奎  邹元荣  由伟丰  蒋春雷 《沉积学报》2002,20(1):13-19

渤海湾盆地北部主要包括黄骅坳陷、沧县隆起、冀中坳陷和下辽河坳陷,区内奥陶系厚 6 0 0～ 80 0m,主要由石灰岩和白云岩组成。下奥陶统分为冶里组和亮甲山组,中奥陶统分为下马家沟组、上马家沟组和峰峰组,上统缺失。其中下马家沟组、上马家沟组和峰峰组又进一步划分为下段和上段。早奥陶世冶里期和亮甲山期,本区以局限海环境为主,其内散布着一些潮坪和滩。中奥陶世,本区岩相古地理面貌变化旋回极为明显,下马家沟期早期潮坪广布,晚期以局限海为主;上马家沟期早期又是潮坪广布,晚期以开阔海为主;峰峰期早期潮坪广布,晚期又以开阔海为主。在奥陶纪,本区经历了 4个大的海侵-海退旋回,其中上马家沟期晚期是本区乃至整个华北地台的最大海侵期。  相似文献   

多矿物岩石流变规律的研究进展及存在问题   总被引：4，自引：2，他引：4  

江燕  臧绍先 《地球物理学进展》2002,17(3):456-463

总结了近年来由多种矿物组成的岩石的流变规律的研究，阐述了多矿物岩石流变性质研究的意义和进展，再从实验和理论两个方面，详细论述了目前最具代表性的三种理论模型，算术平均方法、几何平均方法和能量极小方法，最后，指出这方面研究仍然存在的问题和进一步研究的方向。  相似文献   

Seismic moment distribution revisited: II. Moment conservation principle   总被引：3，自引：0，他引：3  

Yan Y. Kagan 《Geophysical Journal International》2002,149(3):731-754

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Statistic forecast of typhoons going over the Chinese coasts     

FENG Lihua  WU Zhanghua 《地理学报》2003,13(3):305-308

According to the measured data of typhoons going over the Chinese coasts in 1949-2002, a statistic relative equation showing the relation between the central atmospheric pressure of typhoons in a certain region at a certain period of time and their accumulation of frequency is established, and the concept of recurrence interval of typhoons is put forward, which is of actual significance for typhoon disaster reduction along the coastal area.  相似文献   

双鸭山矿区矿井充水规律研究   总被引：2，自引：0，他引：2  

闰孝林  孟凡军 《中国煤田地质》2003,15(2):31-34

根据双鸭山矿区的水文地质条件及多年生产实践资料(矿井涌水量与其相关因素——地貌、采掘深度、回采面积、巷道长度、岩性、构造、降雨的关系),阐述了矿区充水的一般规律,提出了含水砂层覆盖下采区进行水文地质勘探的重点及开采含水砂层覆盖下煤炭资源的主要防治水措施,对同类水文地质条件矿井开采煤炭资源具有可借鉴意义。  相似文献   

地下水中铜元素的迁移富集及其控制因素     

曾昭华张志良  詹春酶 《城市地质》2003,15(4):13-17

研究了地下水中铜元素迁移富集的主要控制因素及其分布规律。结果表明，地下水铜元素的迁移富集与含水介质及其上覆土层中的铜元素含量、地下水的酸碱度、地下水的径流条件和氧化还原环境等有密切的关系。  相似文献   

依法行政做好防震减灾工作--纪念《中华人民共和国防震减灾法》实施5周年     

阎正萃  张跃平  郄晓芸 《山西地震》2003,(2):1-3

从立法、法制宣传、建立健全规章制度和科学规范的管理程序、公正严格执法、执法监督和法制工作队伍建设等6个方面，论述了做好防震减灾依法行政工作的重要性，指出。只有依法行政，才能保障防震减灾工作的顺利发展。  相似文献