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Insight into skywave theory and breakthrough applications in resource exploration

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National Science Review 2021年第12期8卷 55-62页

作者： Qingyun Di Changmin Fu Guoqiang Xue Miaoyue Wang Zhiguo An Ruo Wang Zhongxing Wang Da Lei xianjun zhuo CAS Engineering Laboratory for Deep Resources Equipment and Technology Institute of Geology and GeophysicsChinese Academy of Sciences Key Laboratory of Shale Gas and Geoengineering Institute of Geology and GeophysicsChinese Academy of Sciences Innovation Academy for Earth Science Chinese Academy of Sciences College of Earth and Planetary Sciences University of Chinese Academy of Sciences Key Laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of Sciences China Ship Research and Development Academy

Skywave refers to the electromagnetic wave reflected or refracted from the ionosphere and propagated in the form of a guided wave between the ionosphere and the Earth’s *** the skywave can propagate over large distances,it has been widely used in long-distance *** paper explores and demonstrates the feasibility of skywave for deep resource and energy exploration at depths of up to 10 *** and technical advancements were accomplished in furthering skywave applications.A new solution method based on Green’s function has been developed to study skywave propagation in a fully coupled lithosphere-air-ionosphere full space *** the first time,the model allows one to study skywave distribution characteristics in the lithosphere containing inhomogeneity such as ore deposits or oil and gas *** model also lays a foundation for skywave data processing and *** a parallel line,we have developed a multi-channel,broadband,low-noise,portable data acquisition system suitable for receiving skywave *** the skywave field excited by a high-power fixed source located in central China,actual field surveys have been carried out in some areas in China including the Biyang depression of Henan *** initial results appear encouraging—the interpreted resistivity models prove to be consistent with those of seismic exploration and known geological information,and the exploration cost is only～1/4 to 1/10 that of seismic *** initial successful applications of the skywave theory lay a solid foundation for further verification of the new method.

关键词： skywave theory instrument development electromagnetic exploration deep resources

Relation between electricity structure of the crust and deformation of crustal blocks on the northeastern margin of Qinghai-Tibet Plateau

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Science China Earth Sciences 2005年第10期48卷 1613-1626页

作者： ZHAO Guoze TANG Ji ZHAN Yan CHEN Xiaobin zhuo xianjun WANG Jijun XUAN Fei DENG Qianhui ZHAO Junmeng Institute of Geology China Earthquake AdministrationBeijing 100029China

Study on the electricity structure along a magnetotelluric(MT)sounding profile on the northeastern margin of Qinghai-Tibet Plateau indicates that four crustal blocks can be de-termined from southwest to northeast,namely Bayan Har block(BH),Qin-Qi block(QQ),Hai-yuan block(HY)or the North-South seismotectonic belt and Ordos block(OD).The BH,QQ and OD blocks display a similar electricity structure of the *** upper crust represents a high-resistivity layer and the upper part of lower crust represents a low-resistivity layer with the resis-tivity increasing gradually with depth from the lower part of lower crust to the upper *** electricity structure of the crust in these three blocks is similar to that in the complete blocks on the southern and eastern margins of the Qinghai-Tibet Plateau and belongs to normal electricity layering of the crust in slightly deformed or complete intracontinental *** crust in HY block as a boundary zone has been significantly deformed,hence its electricity layering was de-stroyed and the structure was complex and the block became a recent tectonically active and great seismo-active *** contact belts between the blocks on the northeastern margin of Qinghai-Tibet Plateau exhibit both upthrusting outward and strike-slip movement different from those on the southern and eastern margins of the *** genesis of the low-resistivity layer in the crust is analyzed and the thickness of the lithosphere is estimated in the paper.

关键词： Qinghai-Tibet Plateau crustal block electricity structure of crust tectonic deformation.

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极低频探地工程海洋资源勘探应用探索

中国造船 2019年第A1期60卷 21-27页

作者：刘勇孔亚丽丁葵卓贤军中船重工第七二二研究所低频电磁通信技术实验室武汉430079 中船重工第七研究院北京100192

论文概述了海洋资源电磁勘探发展状况,介绍了极低频探地工程组成,论述了极低频信号随距离传播特性,计算极低频穿透海水深度;通过实际试验进行了初步验证,证明极低频探地工程覆盖范围大,覆盖我国领土和近海,并总结归纳了极低频探地工程... 详细信息

论文概述了海洋资源电磁勘探发展状况,介绍了极低频探地工程组成,论述了极低频信号随距离传播特性,计算极低频穿透海水深度;通过实际试验进行了初步验证,证明极低频探地工程覆盖范围大,覆盖我国领土和近海,并总结归纳了极低频探地工程应用于海洋资源的特点。极低频探地工程为我国海洋石油矿产等资源的勘探开发提供了一种新手段,将推动我国海洋电磁勘探技术的发展。

关键词：极低频海洋资源电磁勘探

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多粒子多空穴能态密度的谐振子模型计算

高能物理与核物理 1989年第12期13卷 1102-1110页

作者：杨显俊张竞上卓益忠中国原子能科学研究院

在严格考虑了泡利不相容原理的前提下,导出了任意单粒子哈密顿量下多粒子多空穴态的能态密度的一般性精确公式;并应用(?)经典的Thomas-Fermi近似,计算了三维线性谐振子下的能态密度;计算了g_(1ρ),至g_(10ρ),g_(1h)至g_(7h)以及g_(1ρ-... 详细信息

在严格考虑了泡利不相容原理的前提下,导出了任意单粒子哈密顿量下多粒子多空穴态的能态密度的一般性精确公式;并应用(?)经典的Thomas-Fermi近似,计算了三维线性谐振子下的能态密度;计算了g_(1ρ),至g_(10ρ),g_(1h)至g_(7h)以及g_(1ρ-1h)至g_(6ρ-6h)能态密度;讨论了泡利不相容原理的影响,与激子模型中通用的等间隔模型的能态密度进行了比较.由计算结果看出,激子模型中通用的等间隔单粒子能级密度模式在由核子诱发的核反应中,是一很好的近似.

关键词：能态密度谐振子模型计算

Geoelectrical Structure of the Crust and Upper Mantle in the Qinling and Adjacent Regions

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Continental Dynamics 1999年第1期 70-77页

作者： LI Li, JIN Guoyuan, YANG Piyuan, LIU Yuhua Institute of Geophysical and Geochemical Exploration, Ministry of Geology and Mineral Resources, Langfang, Hebei 065000, China zhuo xianjun Department of Petroleum Exploration of Zhejiang Province, Yuha

Based on the results of 216 points of magnetotelluric sounding carried out in the Qinling and its adjacent region, we established a 3 D electrical structure model of the crust and upper mantle. The axes of electric resistivity anomalies are mainly east west trending at the depths of 30 km and 90 km, and nearly north south at the depth of 150 km. The low resistivity layers in the upper mantle (LRLIUM) of the North China massif are shallow and about 60 80 km deep. The Yangtze massif was a downwarping region of LRLIUM, which is generally deeper than 120 km. As a whole, the Qinling orogen is situated above the depth transition zone of LRLIUM. Within the zone there are some local uplifts and depressions. In the study area, there are a series of uplift zones of LRLIUM, which may be the passages of the upwelling mantle material. Endogenetic ore deposits since the Mesozoic are mostly distributed above the salient of LRLIUM or above its two sides where the gradient is steep. Molybdenum and wolfram deposits are distributed above the ridge of the salient of LRLIUM, and copper, lead, zinc and gold deposits are distributed above the gradient zones beside the salient of LRLIUM. Deposits are fewer above the depression of LRLIUM. So, the relationship between deposit distribution and LRLIUM’s shape can provide information for prognostication of endogenetic ore deposits.

关键词： Qinling orogen axis of electrical anomaly LRLIUM 3 D geoelectrical structure endogenetic ore de posits

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地震预测中的电磁卫星

大地测量与地球动力学 2005年第2期25卷 1-5页

作者：卓贤军赵国泽王继军汤吉詹艳中国地震局地质研究所北京100029

地震孕育和发生过程中往往会产生低频电磁波(300kHz以下),监测低频电磁信号异常,已成为一种重要的地震短临预测方法。简要介绍了卫星观测到的震前电磁信号异常现象,分析了在地面进行电磁观测存在的局限性和通过地震电磁卫星进行电磁观... 详细信息

地震孕育和发生过程中往往会产生低频电磁波(300kHz以下),监测低频电磁信号异常,已成为一种重要的地震短临预测方法。简要介绍了卫星观测到的震前电磁信号异常现象,分析了在地面进行电磁观测存在的局限性和通过地震电磁卫星进行电磁观测的优势。同时,通过比较已有的电磁卫星,提出了发展中国地震电磁卫星的一些基本设想。

关键词：地震前兆电磁波电离层扰动地震电磁卫星电磁信号