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《地质科技情报》1986,(1)
文章根据激电法理论、国内外二十多年的应用经验和方法近十来年的新进展,总结出激电法的三大优点:1.能寻找各种结构的金属矿;2.干扰因素较少且有可能识别和去除;3.具有较大的探测深度和克服低阻覆盖层影响的能力.文章简述了频域激电法近十来年的几项重大进展:1.相位激电法的广泛应用;2.多频激电测量去耦技术的发展;3.谱激电法的提出及其在理论和实验研究方面的新成就;4.视复电阻率近似公式的发展和面极化体视复电阻率物理模拟不可行性的提出.文章根据激电法的优点、方法的新进展又潜力认为,在寻找深埋金属矿的普查和详查阶段,它可以而且必须作为一种主要电法勘探方法投入使用.但是,应当改变我国以时域纵向中梯装置激电测量为主的传统工作方法与技术.普查时应主要投入频域偶极装置激电法.对发现的激电异常可应用谱激电法识别其性质.在对有意义的异常进行详查时可视情况选用普通的激电法.文章认为,频域激电法今后应着重研究以下五个方面问题:1.岩(矿)石低频特性;2.谱激电法的方法理论;3.视复电阻率的数值模拟;4.视复电阻率谱的自动反演;5.用面极化体进行视复电阻率物理模拟的可行性. 相似文献
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经过在测区进行双频中梯测量,圈定了4个激电异常,综合测区岩石的电性、物性特征,对异常进行了推断和解释。根据所测量的视幅频率和视电阻率结果分析,双频激电法完适应于云南地形起伏较大的地区,并能取得良好的地质效果。 相似文献
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通过频率域激电法在已知矿区实际观测结果,发现在第四系覆盖厚度较大的地区视频散率和激电相位参数存在严重的电磁耦合现象,电磁耦合的干扰湮没了激电效应异常。通过多项式法的视频散率校正和双频相位法的激电相位校正,分离出激电效应异常,且异常范围和形态特征与地下隐伏矿体对应的较好,取得了明显的应用效果。同时根据实际电磁耦合校正工作体会,指出频率域激电法中电磁耦合校正应注意的一些关键技术问题。 相似文献
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以时间域中梯装置激发极化、偶极—偶极装置相位激电测深和可控源音频大地电磁测深在内蒙古乌尼克吐铅锌矿试验结果为例,验证综合电法在寻找矽卡岩型铅锌矿床中的作用及找矿效果。试验结果表明,在激发极化普查测量中应注意供电电极与异常体之间相互关系,否则会产生虚假异常;在勘查区岩矿石电性条件较好的情况下,激发极化面积测量基本能够反映出异常源平面分布情况。在矿(体)与围岩之间的电阻率差异不明显的条件下,较相位激电测深,可控源音频大地电磁测深基本能够推断出矿体的空间赋存位置。所以,时间域中梯装置激发极化与可控源音频大地电磁测深的电法组合在有色金属矿产勘查中可以发挥更大作用。 相似文献
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Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414. 相似文献
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Muriel Rocher Stéphane Baize Stéphane Jaillet Edward Marc Cushing Yannick Lozach Francis Lemeille 《Comptes Rendus Geoscience》2003,335(8):701-708
Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ1 roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003). 相似文献
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正20141756 Chen Ruige(Mathematical College,China University of Geosciences,Beijing100083,China);Zhou Xun Numerical Simulation of Groundwater Level Fluctuation in a Coastal Confined Aquifer with Sloping Initial Groundwater Level Induced by the Tide(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(7),2013,p.1099-1104,6 illus.,16 refs.) Key words:confined water,groundwater level 相似文献
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正20141408 Cai Jia(Institute of Geology,Chinese Academy of Geological Sciences,Beijing100037,China);Liu Fulai Petrogenesis and Metamorphic P-T Conditions of Garnet-Spinel-Biotitebearing Paragneiss in Danangou Area,Daqingshan-Wulashan Metamorphic Complex Belt(Acta Petrologica Sinica,ISSN1000-0569,CN11-1922/P,29(7), 相似文献
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正20142386An Guoying(China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,China)Application of Satellite Remote Sensing in Regional Hydrogeological Investigation:Taking Cenozoic Strata in Wenquan Sheet(1∶250 000)of Karakoram Range as an Example(Geosci- 相似文献
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正20141016An Chengbang(Key Laboratory of Western China’s Environmental Systems,Ministry of Education,Lanzhou University,Lanzhou 730000,China);Zhao Yongtao Lake Records during the Last Glacial Maximum from Xinjiang,NW China and Their Climatic Impli- 相似文献
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正20141538 Cao Qing(School of Earth Sciences and Engineering,Xi’an Petroleum University,Xi’an 710065,China);Zhao Jingzhou Characteristics and Significance of Fluid Inclusions from Majiagou Formation,Yichuan Huangling Area,Ordos Basin(Advances in Earth Science,ISSN1001-8166,CN62-1091/P,28(7),2013,p.819-828,7 illus.,3 tables,43 refs.) 相似文献
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正20142002 Wei Hualing(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang065000,China);Zhou Guohua Element Content and Mineral Compositions in Different Sizes of Soil in Tongling Area,Anhui Province(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(11),2013,p.1861 相似文献
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正20141768 An Shaopeng(Institute of Rock and Soil Mechannics,Chinese Academy of Sciences,Wuhan 430071,China);Wei Lide Experimental Study on Mechanical Behavior of Xigeda Formation Siltstone and Structure Interface(Journal of Engineering Geology,ISSN1004-9665,CN11-3249/P,21(5),2013,p.702-708,9illus.,1 table,16 refs.) 相似文献