物探方法在探测隐伏断层中的应用   总被引：7，自引：0，他引：7  

金东淳  崔天日 《世界地质》2003,22(1):82-85

在地震安全性评价和工程场地勘探中，探明活动断层是一项必做的工作；而探明活动断层的方法选择要因地制宜，经济科学。笔者运用电剖面法、地震反射法、地质雷达法以及断层气测量方法，对珲春地震小区内含煤盆地中的发震断裂构造进行了研究，断层气测量法是一种探测(除水域、稻田以外的地区)隐伏断层的简捷、快速、可靠、经济的方法。  相似文献   

软弱夹层特性对地震波强度影响的模拟研究   总被引：7，自引：2，他引：7  

黄润秋  余嘉顺 《工程地质学报》2003,11(3):312-317

模拟了隐伏软弱夹层的弹塑性参数对其地震波放大效应的影响,发现当软弱层波速不大于上下围岩的 30 %时,就会在特定的频率上产生相当显著的地震动放大作用。研究结果表明,夹层放大作用的强度主要与其波速有关,而与密度及品质因素关系不大。研究还发现,这种放大作用的强度受软弱层波速与厚度之间的某种关系制约。这种关系的规律尚待通过进一步的理论分析或大量模拟研究去揭示。  相似文献   

Holocene climate phases from buried soils in Tigray (northern Ethiopia): comparison with lake level fluctuations in the Main Ethiopian Rift     

Francesco Dramis  Mohammed Umer  Gilberto Calderoni  Mitiku Haile 《Quaternary Research》2003,60(3):274-283

Stratigraphic analysis of alluvial/colluvial sequences and ¹⁴C dating have been used as proxies for Holocene climate changes in the highlands of Tigray (northern Ethiopia). The studied records show alternations of buried soils and peaty–clayey sediments, pointing to wet, stabilization phases, and organic-free colluvium layers resulting from the abrupt occurrence of dry-climate episodes. The ¹⁴C dates, mostly unpublished, cluster in the 11,090–9915, 9465–9135, 8450–7330, 6720–3635, 2710–2345, and 1265–790 cal yr B.P. time spans. Evidence of subsequent pedogenesis is lacking in the area, apart from a buried humified horizon dated at 300 ± 60 ¹⁴C yr B.P. (460–295 cal yr B.P.). Both the timing and the pattern of Tigray paleoclimatic events fit the corresponding framework, based on lake level changes, previously implemented for the Main Rift Valley. These findings give further support for arguing that the forcing mechanisms of the wet/dry fluctuations during the Holocene were effective over a large scale.  相似文献   

应用遥感在中国西北部荒漠覆盖区寻找隐伏构造的方法探索   总被引：6，自引：0，他引：6  

谭青 《国土资源遥感》1998,9(4):55-58

西北地区沙漠、戈壁广布,许多地方荒无人烟,但能源和矿产资源丰富,辽阔的地域是充分发挥遥感优势的有利用武之地。本文总结了在西北地区应用遥感寻找隐伏构造的方法,并提出遥感与其它非地震勘探方法相配合,可在油气资源勘查中发挥更大的作用。  相似文献   

Seismic response of natural gas and water pipelines in the Ji-Ji earthquake   总被引：3，自引：0，他引：3  

Walter W. Chen  Ban-jwu Shih  Yi-Chih Chen  Jui-Huang Hung  Howard H. Hwang 《Soil Dynamics and Earthquake Engineering》2002,22(9-12):1209-1214

In order to study the damage patterns of natural gas and water pipelines in the Ji-Ji earthquake, a GIS database and analysis procedures were established. Repair statistics was obtained from major natural gas companies and the Taiwan Water Supply Corporation (TWSC), and entered into the system. Then, repair rates (RR) were calculated. Previously, damage was analyzed without considering the corresponding pipeline material and diameters. In this study, new attempts were made to collect more data including those related to the composition of pipelines to provide a more detailed analysis of the relationship between earthquake forces and the resulting damage. Statistical analysis was also conducted to understand the correlation between RR and seismic parameters such as the peak ground acceleration, peak ground velocity, and spectrum intensity.  相似文献   

上海两条隐伏经四纪断裂的研究   总被引：1，自引：1，他引：1       下载免费PDF全文

章振铨  刘昌森 《地震地质》2001,23(4):545-555

以浅层地震勘探为主要方法，研究了上海两条主要断裂（太仑－奉贤断裂和枫泾－川沙断裂）的第四纪活动性，结果表明，断裂的最新活动一般在早更新世－中更新世，个别区段的活动可延续至晚更新世。  相似文献   

上海饮用天然矿泉水   总被引：2，自引：0，他引：2  

孙永福  邱桢安 《上海国土资源》1989,(4)

上海市区西部发现饮用天然矿泉水,这是上海市民的福音。文中论述了矿泉水的地质、水文地质条件,分析了矿泉水的水质特征,以及形成的地球化学环境,并展望了上海开发矿泉水的远景。  相似文献   

Identification of hydrogeochemical zones in postglacial buried valley aquifer (Wielkopolska Buried Valley aquifer,Poland)   总被引：3，自引：0，他引：3  

Krzysztof Dragon  Józef Górski 《Environmental Geology》2009,58(4):859-866

This article presents the difficulty in identifying the hydrochemical zoning of a semi-confined aquifer, characterised by a relative small spatial differentiation of groundwater chemistry. It is shown that multivariate statistical methods can be used for the recognition and interpretation of the groundwater chemistry distribution in an aquifer. The hydrochemical zonation caused by both natural and anthropogenic processes was identified using factor analyses in combination with a classical interpretation of the hydrogeological material. The interpretation of the groundwater chemistry allows both identification of the aquifer recharge mechanism and verification of the groundwater-flow system.  相似文献   

隐伏矿床勘查哲学探讨          下载免费PDF全文

吴富强  黄均权  桂长杰  鞠昌荣 《江苏地质》2009,33(3):251-255

矿产勘查哲学是在进入20世纪70年代以后,地表易发现、易识别矿床的日趋减少,矿床发现率不断下降,导致部分矿产勘查工作者出现悲观思潮的背景下诞生的;阐述了矿产勘查哲学的主要研究内容是指导矿产勘查工作的一整套基本原理和原则;介绍了不同学者对矿产勘查哲学的认识,论述了矿产勘查哲学在矿产百年找矿史中的应用,提出了隐伏矿床勘查的突破更需要矿产勘查哲学的指导。  相似文献   

Distribution of potential geological hazards and control factors in Qingdao offshore,China     

《China Geology》2019,2(1):40-48

Engineering construction actively occurs in coastal zones, and these areas have numerous potential geological hazard factors. Since 2009, the development of geological surveys in sea areas has promoted extensive geophysical surveys in Qingdao offshore. In the present study, the types and distribution of potential geological hazard factors were systematically revealed using sub-bottom profile data, side-scan sonar data, and single-channel seismic data, among others. Based on previous research findings, the potential geological hazard factors are classified, and control factors in Qingdao offshore are discussed. The research results show that the primary potential geological hazards include active faults, buried paleo channels, shallow gas, irregular bedrock, eroded gullies, estuary deltas, tidal sand ridges, and seawater intrusion. In addition, neotectonic movement, sea level changes and sedimentary dynamic processes were the main factors that affected the distribution of geological hazards in Qingdao offshore.©2019 China Geology Editorial Office.  相似文献