Loading...
E-mail Alert Rss
 
Office Online
News
gfff
More>>
Information
Sponsored by:
China Aero Geophysical Survey and Remote Sensing Center for Natural Resources
Edited by:
Editorial Office of Geophysical and Geochemical Exploration
Add:
29 Xueyuan Road, Beijing 100083,China
Tel: 86-010-62060192/62060193
Fax: 86-010-62060193
Email: whtbjb@sina.com
Web: http://www.wutanyuhuatan.com
Editor in Chief: XIONG ShengQing
Published by:
The Geological Publishing House (31 Xueyuan Road,Beijing 100083,China)
Printer:
Beijing Changning Printing Co. Ltd.
Distributor: Beijing Post Office
Abroad Distributor:
China International Book Trading〖DW〗Corporation
Subscription Hander:
Local Post Offices of China
Links
More>>
  • Table of Content
      10 February 2010, Volume 34 Issue 1 Previous Issue    Next Issue
    For Selected: View Abstracts Toggle Thumbnails
    wutanyuhuatan
    A NEW DEVELOPMENT PERIOD OF THE GRAVITY AND MAGNETIC EXPLORATION
    ZHANG Chang-Da, DONG Hao-Bin
    Geophysical and Geochemical Exploration. 2010, 34 (1): 1-7.  
    Abstract   HTML   PDF (431KB) ( 3505 )

    A review on the airborne gravity survey and airborne magnetic survey are given in this paper. The

    authors hold that these techniques have entered into a new development period, as evidenced by the

    emergence of such technologic indicators as airborne vector magnetometry, magnetic fulltensor LTSSQUID

    and HTSSQUID gradiometry, airborne gravimetry, gravity gradiometry and geophysical survey by UAV.

    Related Articles | Metrics
    LOCAL AEROMAGNETIC ANOMALY RELATED TO STRUCTURAL TRAP
    OF HYDROCARBON RESOURCES IN THE ZHUJIANG RIVER MOUTH BASIN
    ZHANG Yong-Jun, LIU Zhen-Jun, ZHOU Jian-Xin
    Geophysical and Geochemical Exploration. 2010, 34 (1): 8-13.  
    Abstract   HTML   PDF (1597KB) ( 739 )

    There are abundant hydrocarbon resources in the Zhujiang River mouth basin, whose hydrocarbon

    exploration potential has attracted more and more interest among scientists. Local magnetic anomaly is always

    bound up with local structural trap of hydrocarbon resources. Based on processing and analysis of largescale

    and highresolution aeromagnetic data, the authors distinguished five kinds of local aeromagnetic anomalies

    related to structural trap. They have to do with basement rocks, basic intrusive rocks, intermediateacid

    intrusive rocks, volcanic rocks or sedimentary rocks. The characteristics of each kind of local aeromagnetic

    anomalies related to structural trap are described in detail in this paper. Combined with seismic, gravity and

    drilling data, the authors have made geological interpretation of some typical anomalies,thus providing the

    basis for oil and gas exploration.

    Related Articles | Metrics
    THE ACTIVITIES OF THE CONCEALED FAULTS AND THEIR CONTROL
    OVER THE FLUIDS IN SHIFANG AREA, WESTERN SICHUAN
    PANG He-Qing, WANG Duo-Yi, CAI Zuo-Hua, CHENG Jian, HUANG Yao-Zong, DENG Zu-Lin, LI Xing-Yun, TANG Rong, JIANG Zeng-Ping
    Geophysical and Geochemical Exploration. 2010, 34 (1): 14-18.  
    Abstract   HTML   PDF (1314KB) ( 804 )

     Using quite a few methods such as the interpretation of the remote sensing geology, the analysis of the trace elements in soil, the survey of the gas radon in soil and the observation of the field outcrop, the authors identified 22 concealed faults in Jiandi area of Shifang. These faults can be classified into three groups, striking NNW, NEE and approximately EW respectively. Influenced by nappe rising of Guankou fault, most of the concealed faults show obvious tensoshear activities, and zones of waterbearing fractures are well developed. In this paper, hydrogeochemistry of oil and gas and regularity of groundwater activities were used to investigate the configuration relationship between the fractures, cap rocks and groundwater in this area. The authors hold that there exists some potential in search for gas reservoirs of the hydrodynamic trap in some areas of the monoclinic belt and in exploring deep gas reservoirs in the YunxiXujiachang noseshaped anticline, in spite of the fact that the overall conditions of the oil and gas preservation in this area are poor.

    Related Articles | Metrics
    GEOLOGICALGEOCHEMICAL PROSPECTING MODEL
    FOR THE REXIANG COPPER DEPOSIT IN WESTERN SICHUAN
    FEI Guang-Chun, LI You-Guo, WEN Chun-Qi, CHEN Xu, DUAN Qiong
    Geophysical and Geochemical Exploration. 2010, 34 (1): 19-23.  
    Abstract   HTML   PDF (563KB) ( 677 )

    The Rexiang copper deposit is located in the secondary syncline core of Niangyongfu syncline on the hanging wall of Xiangcheng fault and occurs in granodiorite dikes. According to researches on the ore body, ores and content of major and trace elements, the authors preliminarily hold that the Rexiang ore deposit is a hydrothermal copper deposit formed by magmatic intrusion in faults resulting from intracontinental strikeslip. On the basis of a comprehensive analysis, the authors have constructed a geologicalgeochemical oreprospecting model for the Rexiang copper deposit.

    Related Articles | Metrics
    GEOCHEMICAL CHARACTERISTICS OF THE FOZICHONG LEADZINC
    OREFIELD IN GUANGXI
    ZHAO Wu-Qiang, SONG Ci-An
    Geophysical and Geochemical Exploration. 2010, 34 (1): 24-29.  
    Abstract   HTML   PDF (825KB) ( 644 )

     Based on an analysis and summarization of the geochemical characteristics of elements in strata and magmatic rocks within the Fozichong leadzinc orefield of Guangxi, this paper deals with the relationship, modes of occurrence, horizontal zoning and cluster characteristics of various elements in this orefield.

    Related Articles | Metrics
    SURFACE GEOCHEMISTRY OF SOIL IN THE DEERBUER PbZn DEPOSIT
    WANG Ge, SUN Zhong-Jun, WU Rong-Gao, YANG Shao-Ping, KONG Mu, LIU Hua-Zhong
    Geophysical and Geochemical Exploration. 2010, 34 (1): 30-31.  
    Abstract   HTML   PDF (425KB) ( 738 )

    The Deerbuer PbZn deposit is located in a forest and swamp area. Element geochemistry of soil in the low temperature and rich organic matter environment was studied. It is shown that element geochemistry is influenced by rock, soil granularity, ironmanganese oxides, organic matter and acid precipitation, and that modes of occurrence of elements in eluvial and humus layers are mainly ironmanganese oxides which play a significant role in element enrichment. The adsorption of organic matter is affected by soil granularity, horizon, and organic matter content.

    Related Articles | Metrics
    ISOTOPE GEOCHEMICAL CHARACTERISTICS OF THE LENGSHUIBEIGOU
    LEADZINCSILVER ORE DISTRICT IN EAST QINLING
    FU Zhi-Guo, WENG Ji-Chang, YAN Chang-Hai, GAO Sheng-Huai
    Geophysical and Geochemical Exploration. 2010, 34 (1): 34-39.  
    Abstract   HTML   PDF (1158KB) ( 896 )

    Based on a series of analytical data, this paper studied the isotopic geochemical characteristics of the Lengshuibeigou leadzincsilver ore deposit in Luanchuan County, Henan Province, so as to probe into the variation regularity of elements in the East Qinling leadzincsilver metallogenic system. The oreforming material source, the composition of oreforming hydrothermal fluids and the metallogenic environment of the ore deposit were analyzed. 40Ar39Ar dating of quartz was made, and the result shows that the silverleadzinc bearing quartz veins are products of Late Yanshanian metallogenic process. The achievements obtained are valuable in oreprospecting practice.

    Related Articles | Metrics
    THE APPLICATION OF INTEGRATED ELECTRIC METHODS
    TO THE EXPLORATION OF DEEP CONCEALED ORE BODIES
    ZHANG Jian-Jin, YANG Jin
    Geophysical and Geochemical Exploration. 2010, 34 (1): 40-43.  
    Abstract   HTML   PDF (811KB) ( 1742 )

     An integrated application of such means of the intermediate gradient installment as the timedomain IP method, controlled source audiofrequency magnetotelluric sounding method and phase IP method was tested in the exploration of metallic ore deposits in the Deerbugan polymetallic ore belt in northeastern Inner Mongolia, with excellent result obtained. This test shows that the application of multiple parameters to the integrated analysis is characterized by mutual supplement and mutual verification, has abundant information, reduces the multisolution possibility in geophysical exploration and improves the reliability of geological integration.

    Related Articles | Metrics
    GEOLOGICAL AND HYDROGEOCHEMICAL CHARACTERISTICS
     GEOTHERMAL PAIRED WELLS IN DONGLI LAKE AREA TIANJIN
    WANG Wei-Xing, SUN Yu-Dong, YANG Yong-Jiang, WANG Guang-Hui, ZHAO Na
    Geophysical and Geochemical Exploration. 2010, 34 (1): 44-48.  
    Abstract   HTML   PDF (500KB) ( 838 )

    The SR28 and SR29 geothermal paired wells are located in Dongli District of Tianjin, lying on the western fringe of bigsmall Dongzhuang doming in Cangxian uplift, near the Cangdong fault and at the center of the Shanlingzi geothermal anomaly area. The SR28 and SR29 geothermal paired wells use the geothermal reservoir of Wumishan Formation of Mesoproterozoic Jixian System as the target layer of exploitation and recharge. This paper analyzed the hydrogeochemical characteristics of geothermal water according to chemical analysis, and the result shows that SR28 and SR29 geothermal water belongs to continental sedimentary water formed in the strata with dissolved salt brine, that carbonate strata of Wumishan Formation constitute the storage layer of geothermal water, and that the geothermal water is likely to come from the supplement of outside sources which go through upper limestone strata. Being unpolluted and microcorrosion type water, SR28 and SR29 geothermal water does not form CaCO3 or CaSO4·2H2O scales, but sometimes may generate SiO2 scales.

    Related Articles | Metrics
    EQUENCE STRATIGRAPHY AND SEDIMENTARY FACIES OF  SHAHEJIE FORMATION IN TANGZHUANG AREA OF HUIMIN DEPRESSION
    WANG Ming-Jian, GUO Jing-Xing, XI Zhu-Gang
    Geophysical and Geochemical Exploration. 2010, 34 (1): 49-53.  
    Abstract   HTML   PDF (2546KB) ( 562 )

    Microfacies is of great significance in oil field exploitation, because it determines the distribution of reservoirs and barriers of the flow and also controls the fluid flow difference of the reservoir sand. Researches on sedimentary facies are based on the accurate and precise stratigraphic framework model. According to geological characteristics and results of previous studies, the authors used seismic and logging data to identify the thirdgrade sequence boundaries and divided the sequence into systems tracts. On such a basis, the sequence stratigraphic framework of the study area was established, the sedimentary microfacies were divided, and the accurate sedimentary facies model of the study area was constructed through a comprehensive analysis of the single well and logging data.

    Related Articles | Metrics
    SEVERAL PROBLEMS CONCERNING RESERVOIR PREDICTION
    OF FLUVIAL SANDSTONE
    CUI Yong-Qian, SHAO Long-Yi, XIE Jian-Rong, HU Jian-Ling, DU Wei-Liang, FENG Xiao-Ying
    Geophysical and Geochemical Exploration. 2010, 34 (1): 54-58.  
    Abstract   HTML   PDF (4995KB) ( 1437 )

    Fluvial sandstone commonly constitutes a reservoir in the continental depression. Frequent river diversion, growth of interbedded sandstone and mudstone and fast lateral variation have resulted in interrupted seismic reflection. The reservoir prediction is therefore very difficult. In this paper, precise interpretation of stratigraphic position and isochronous parallelism of strata was made according to actual data. Optimized seismic attributes were extracted, frequency division of thin layers was studied, and river channel distribution in plan was predicted by using the result of frequency division. Simulated sonic inversion using optimized parameters yielded the high precision prediction result. Drilling verification shows that the technology used is very effective.

    Related Articles | Metrics
    THE EFFECT OF INTEGRATED GEOPHYSICAL EXPLORATION
    IN THE YAOGANXIAN WOLFRAMITE ORE DEPOSIT
    YAN Yue-Ping, DAI Qian-Wei, GAN Xian-Ping
    Geophysical and Geochemical Exploration. 2010, 34 (1): 59-62.  
    Abstract   HTML   PDF (881KB) ( 946 )

    Based on a study of gravity and aeromagnetic anomalies detected in the Yaogangxian wolframite ore deposit in combination with ground magnetic and induced polarization survey, this paper summed up the characteristics of geophysical anomalies in this ore district and made an ore prognosis. Through further geophysical work, the verification drill holes were suggested in the prognostic area. Drilling results of the geophysical field have not only proved the existence of the geophysical source body but also discovered new sources of ores and minerals. Thus the crisis mine exploration has gained a great breakthrough in one of the mining areas. All this has provided a good basis for the mine planning and development.

    Related Articles | Metrics
    THE COLLECTION AND APPLICATION OF SOIL GAS HYDROCARBON IN OIL
     AND GAS EXPLORATION
    REN Chun, SUN Chang-Qing, TANG Yu-Ping, LI Ji-Peng
    Geophysical and Geochemical Exploration. 2010, 34 (1): 63-65.  
    Abstract   HTML   PDF (488KB) ( 573 )

    Gas geochemistry has been widely used in search for ore deposits and concealed faults. The collection of qualified soil gas samples suitable for different soil conditions constitutes one of the key factors for the success of the gas geochemical method. Every soil gas collector used in China and abroad can only be suitable for a specific soil environment. Effective methods are lacking for wet clay and soil layers likely to accumulate water. The "soil gas collection twist drill" invented by the authors can solve this problem. With this drill, we can easily collect qualified soil gas samples. Case studies over different types of oil and gas accumulations show that the utilization of soil gas to hydrocarbon analysis can effectively predict underlying oil and gas accumulations.

    Related Articles | Metrics
    THE TEST RESULT OF THE CONTROLLED SOURCE AUDIOFREQUECY
    MAGNETOTELLURIC METHOD IN THE PROSPECTING FOR DEEP ORE DEPOSITS
    ZHANG Guo-Hong, LI Ren-He
    Geophysical and Geochemical Exploration. 2010, 34 (1): 66-70.  
    Abstract   HTML   PDF (1623KB) ( 1576 )

    To examine the actual result of the electricmagnetic method in detecting deep metallic ore deposits and structures,

    the authors conducted two tests in two known buried iron and copper ore deposits by using Controlled Source Audiofrequency

    Magnetotelluric Method (CSAMT). The two known ore bodies have the buried depths of about 500 m and 1 100 m, respectively. The

    results of the tests show that the geoelectrical anomalies can indicate the distribution of ore bodies, faults and lithologic

    contact zones. When the buried depth of the ore body is less than 500 m and the ore bed is relatively thick, the geoelectrical

    anomaly is very obvious. When the buried depth of the ore body is more than 1 000 m, the geoelectrical anomaly mainly reflects

    the orecontrolling and orehosting structure.

    Related Articles | Metrics
    THE INFLUENCE OF THE SPACE OF SEARCHING LINES
    ON THE MARINE MAGENTIC SEARCH FOR UNDERWATER OBJECTS
    KE Ze-Xian, ZHAO Jun-Sheng, REN Lai-Ping, LIU Yan-Chun
    Geophysical and Geochemical Exploration. 2010, 34 (1): 71-73.  
    Abstract   HTML   PDF (551KB) ( 975 )

    The analysis of the influencing factors constitutes the basis of designing the precise line interval in magnetic

    searching. Taking the underwater small object as a magnetic dipole, the authors found the law of the magnetic force attenuation

    of the magnetic object. A formula for defining searching line space was put forward based on an organic analysis of the influence

    caused by such factors as the magnetic force, signaltonoise of the instrument, geomagnetic change, geomagnetic diurnal

    variation, and dynamic working condition.

    Related Articles | Metrics
    A COMPARISON OF DIGITAL LOWPASS FIRFILTERS IN AIRBORNE GRAVIMETRY
    CAI Shao-Kun, WU Mei-Ping, ZHANG Kai-Dong
    Geophysical and Geochemical Exploration. 2010, 34 (1): 74-78.  
    Abstract   HTML   PDF (1055KB) ( 964 )

    There is a lot of noise in the data observed by airborne gravimeter. Digital lowpass FIRfilter is needed to extract the factual gravity field information from such data. Based on a set of real data of airborne gravimetry, the authors dealt with the determination of the cutoff frequency

    and filter length of the digital lowpass FIRfilter, and studied the method for deleting ineffectual data. Based on a comparison

    of the capabilities of filters designed by different window functions, it is concluded that, in airborne gravimetry, the digital

    lowpass FIRfilter designed by Hanning window and Hamming window can meet the requirement of extracting the gravity field

    information.

    Related Articles | Metrics
    AN EVALUATION OF NATURAL RADIATION ENVIRONMENTAL GEOLOGY
    OF CHENGDU ECONOMIC AREA
    ZENG Bing, GE Liang-Quan, LIU He-Fan, ZHANG Jin-Zhao
    Geophysical and Geochemical Exploration. 2010, 34 (1): 79-84.  
    Abstract   HTML   PDF (1309KB) ( 805 )

    Using geochemical prospecting data obtained in previous geological investigation and soil U, Th and K content data

    obtained from 1∶250 000 geochemical exploration in Chengdu Economic Area, this paper predicted the natural radioactivity on the

    groundair interface. The results show that the specific activity of the radioactive nuclide  40K is higher than its average

    values of China and the world, 238U  is much lower than its average values of China and the world, and 232Th  is equivalent to

    its average value of China but much higher than its average value of the world. Except for small areas in Longmenshan folded belt

    and EmeishanWashan faulted fold belt, the radiation level of Chengdu Economic Area is within the national limits of radioactive

    nuclides in building materials. This paper provides support for the reasonable and effective use of land and resources in Chengdu

    Economic Area and also supplies the necessary reference for speeding up economic integration and sustainable development of

    cities.

    Related Articles | Metrics
    THE SHALLOW SEISMIC REFLECTION SURVEY
    IN THE PREDICTION OF THE COLLAPSE
    ZHANG Kai, WANG Qing-Song
    Geophysical and Geochemical Exploration. 2010, 34 (1): 85-88.  
    Abstract   HTML   PDF (2127KB) ( 729 )

    To solve the problem of sudden collapse in the salt mining area, the authors used twodimensional shallow seismic reflection

    method to conduct a comprehensive exploration in the surrounding pit collapse area. The causes of the collapse were detected, the

    safety area was delineated, and a potential collapse area was predicted successfully 73 days before the collapsing. All this has

    yielded very good social and economic benefits.

    Related Articles | Metrics
    THE APPLICATION OF THE GROUND MAGNETIC METHOD TO THE EXPLORATION OF FIRE AREA BOUNDARY OF THE COAL FIELD
    CHEN Min, SHAO Wei
    Geophysical and Geochemical Exploration. 2010, 34 (1): 89-92.  
    Abstract   HTML   PDF (975KB) ( 1047 )

    Aimed at determining the boundary of the coal seam selfcombustion area, the authors made a comparative analysis of

    surveyed ground highprecision magnetic field characteristics and drilling results. On such a basis, it is held that the

    adoption of ΔT vertical first derivative method can effectively delineate the selfcombustion boundary of the coal seam.

    Related Articles | Metrics
    THE CHOICE OF GRIDDING METHODS FOR GEOPHYSICAL DATA
    LIU Zhao-Ping, YANG Jin, WU Wei
    Geophysical and Geochemical Exploration. 2010, 34 (1): 93-97.  
    Abstract   HTML   PDF (1939KB) ( 2597 )

    In drawing the contour map of geophysical data, suitable gridding methods should be chosen according to objective

    environment characteristics and characteristics of data themselves. With practical examples, this paper deals with some common

    gridding methods such as inverse distance to a power, Kriging, Minimum Curvatrue, Nearest Neighbor, Polynomial Regression, Radial

    Basis Function, and Triangulation/Liner Interpolation, probing into their choosing means, applicable fields and parameter

    installment.

    Related Articles | Metrics
    THE APPLICATION OF Von Karman TYPE AUTOCORRELATION FUNCTION TO MODELING RANDOM MEDIA
    LI Can-Ping, WANG Nan-Ping, LI Zhi-Hong
    Geophysical and Geochemical Exploration. 2010, 34 (1): 98-102.  
    Abstract   HTML   PDF (2345KB) ( 743 )

    This paper constructed random media models using the Von Karman type autocorrelation function, discussed the model

    characteristics by two model parameters of autocorrelation length and spectrum exponent and analyzed the distribution and

    variation of velocities in the models under the conditions of different variances. The results show that the variations of random

    media models of heterogeneity scales in lateral and longitudinal directions are all produced by changing autocorrelation length

    and lateral and longitudinal spectrum exponent. The disturbance range of the random perturbation is different if the disturbance

    variance is different, and such a difference results in fluctuation of velocities in models around the background velocity. The

    modeling figures demonstrate that random medium models can vividly describe real media.

    Related Articles | Metrics
    ELASTIC WAVE FIELD SEPARATION NUMERICAL MODELING SCHEME BASED ON DIVERGENCE AND CURL
    CHEN Ke-Yang, WU Qing-Ling, YANG Wei, LI Lai-Lin, FAN Xing-Cai
    Geophysical and Geochemical Exploration. 2010, 34 (1): 103-107.  
    Abstract   HTML   PDF (2221KB) ( 1469 )

    Elastic wave field separation numerical modeling has been an important means to study the propagating rule of pure

    compress wave and pure shear wave of the hybrid elastic wave field. The general method is achieved by the operator separation,

    which not only increase the computed memory, but also waste a lot of computed time. Thus we put forward a new elastic wave field

    separation numerical modeling scheme base on divergence and curl, which is only depended on staggered grid to compute the

    divergence field (compress wave) and curl field (shear wave), so the computed efficiency is greatly improved. Perfect Matched

    Layer (PML) absorbing boundary condition is used to weaken the reflection wave from the boundary. The numerical result shows that

    this method can correctly and quickly separate pure compress wave and pure shear wave from hybrid wave field with high precision,

    good boundary absorption, and the numerical process is stable, so it can be used to guide multiwave multicomponents seismic

    datum processing, and also point out that the method has difficulty to separate the coupled wave type such as surface wave.

    Related Articles | Metrics
    THE CONSTRUCTION AND APPLICATION OF DATA WAREHOUSE
    FOR OIL EXPLORATION AND DEVELOPMENT
    ZHAO Gui-Ju, WANG Yan-Chun, CUI Qi-Shan, CUI Shu-Hong
    Geophysical and Geochemical Exploration. 2010, 34 (1): 108-110.  
    Abstract   HTML   PDF (787KB) ( 750 )

    With the increase of data information on oil exploration and development, some departments have set up databases.

    Nevertheless, as exploration and development belong to different branches, two isolated big information islands have come into

    being. Therefore, a solution must be put forward which combines the exploration with development. This plan can not only

    implement the data share but also provide technical support for the application and research. Through an analysis of database and

    a study of data mining technology, the authors put forward a designing scheme based on the exploration and development of data

    warehouse, which is in connection with the requirement of production flow. A typical software has been designed, which is based

    on the model. The result obtained shows that the incorporated data warehouse is feasible and reasonable.

    Related Articles | Metrics
    DATA PROCESSING IN THE MULTIELECTRODE
    INDUCED POLARIZATION METHOD
    WANG Chun-Sheng, YU Ai-Jun, FAN Zhan-Jun, MA De-Xi, CHAO Yin-Yin
    Geophysical and Geochemical Exploration. 2010, 34 (1): 111-114.  
    Abstract   HTML   PDF (1013KB) ( 1216 )

    Break points or negative values often appear in the data of charging rate during the performance of the multi

    electrode induced polarization method in the field, which causes great difficulty in data interpretation. Based on an analysis of

    the causes of break points and negative values, this paper gives prominence to the useful anomaly by using interpolation of cubic

    spline to process the data. Threepoints slurring filtering is conducted to reduce random interference effectively.

    Related Articles | Metrics
    THE APPLICATION OF GROUND PENETRATING RADAR AND HIGH
    DENSITY RESISTIVITY METHOD TO THE DETECTION OF INNING DAM
    WEI Yong-Qiang, DENG Ju-Zhi, DING Chang-He
    Geophysical and Geochemical Exploration. 2010, 34 (1): 115-118.  
    Abstract   HTML   PDF (831KB) ( 1046 )

    In view of the electrical difference between the riprap layer and the argillaceous clay layer, the authors used

    synthetic methods of ground penetrating radar and highdensity resistivity to detect the riprap layer in an inning dam. The

    result shows that the limits and thickness of the riprap detected by the synthetic methods are quite coincident with those

    detected by the drilling. This indicates that synthetic use of ground penetrating radar and high density resistivity method is

    very effective in riprap layer detection.

    Related Articles | Metrics
    ADVANCED GEOLOGICAL FORECAST OF APPLICATION OF GPR IN ROAD TUNNEL
    FAN Zhan-Feng, LI Tian-Bin, MENG Liu-Bo
    Geophysical and Geochemical Exploration. 2010, 34 (1): 119-122.  
    Abstract   HTML   PDF (1392KB) ( 893 )

     As an instrument of advanced geological forecast method in road tunnel, GPR(Ground Penetrating Radar)plays an

    important role to predict remote structure in the front of facing frontage and can be the further realization and supplement of

    tunnel prospect at the same time.On the basis of simply introducing the principle of electromagnetic wave of GPR in paper, it is

    successful to forecast the the faulted zone and ground water which exist in Xinzhagou tunnel using SIR20 GPR and engineering

    geology technique. The paper simply make a research on the characteristics of frequency spectra of GPR' reflective wave to these

    harmful geological bodies and it will contribute to interpret the future detecting data.

    Related Articles | Metrics
    FITTING PARAMETERS FOR DETERMINING BEARING CAPACITY OF
    THE PREFABRICATED PILE BY USING THE HIGH STRAIN METHOD
    GAO Bing-Xin, CHEN Chong, SHI Jian
    Geophysical and Geochemical Exploration. 2010, 34 (1): 123-126.  
    Abstract   HTML   PDF (1848KB) ( 1186 )

     The bearing capacity of the prefabricated pile obtained by the high strain method is not entirely correct. In

    obtaining accurate bearing capacity, fitting parameters are not necessarily confined in the provided range. The high strain curve

    should be explained on the basis of the fitting parameters determined by such factors as the parameters of the prefabricated

    pile, the construction technology and the engineering properties of soil. Only in this way can real bearing capacity be obtained.

    Related Articles | Metrics
京ICP备05055290号-3
Copyright © 2021 Geophysical and Geochemical Exploration, All Rights Reserved.
Tel:(8610)62301569   Email:wt@caict.ac.cn