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
      24 April 1987, Volume 11 Issue 2 Previous Issue    Next Issue
    For Selected: View Abstracts Toggle Thumbnails
    wutanyuhuatan
    A REVIEW AND ANALYSIS OF ORE-PROSPECTING EFFECT OF GEOCHMICAL METHODS PERFORMED BY MGMR
    Sun Huanzhen, Zhou Qinglai
    Geophysical and Geochemical Exploration. 1987, 11 (2): 81-88.  
    Abstract   HTML   PDF (578KB) ( 481 )

    Based on the statistical data on the practical ore-prospecting effect of geo-chemical methods employed by bureaus of geology and mineral resources ofvarious provinces or autonomous regions under MGMR, the present paper makesa comparison and illustrates the variation of ore-searching effects of geochemi-cal techniques in three different periods, i. e., from 1960 to 1975, from 1976 to1980, and from 1981 to 1985. It also analyses and discusses tbe reason for ob-taining such good ore-prospecting results.

    References | Related Articles | Metrics
    THE APPLICATION OF HIGH-RESOLUTION SEISMIC EXPLORATION TO COALFIELD SURVEY AND ITS EFFECT
    Tang Wenbang
    Geophysical and Geochemical Exploration. 1987, 11 (2): 89-100.  
    Abstract   HTML   PDF (2243KB) ( 873 )

    Taking high-resolution seismic exploration test conducted at the Yongchengcoalfield in Henan Frovince as an example, this paper gives a description of thehigh-resolution seismic method and its effect in coalfield survey. Having raisedobservation frequency of the seismic wave, the researchers have obtained strongreflection waves from thin coal seam 2-5m in thickness or from thin coalmeasures 1-2 m in thickness. This achievement changes to a certain degree thepresent situation of indirect search for coal seams and their structures by rou-tine medium frequency coalfield seismic exploration, thus creating favourable con-ditions for accurate investigation of structural forms of coal seams as well asfor identification of faults with small throw, and providing basis for researchesinto properties and variations of coal seams.

    References | Related Articles | Metrics
    THE APPLICATION OF SOIL △C METHOD IN COMPREHENSIVE GEOCHEMICAL OIL-GAS PROSPECTING
    Zhang Jinlai
    Geophysical and Geochemical Exploration. 1987, 11 (2): 101-105.  
    Abstract   HTML   PDF (362KB) ( 449 )

    The comprehensive geochemical Oil-gas prospecting means the combinedutilization of various geochemical prospecting techniques and varied geocbemicalindicators. It evidently has much more advantages than the mere use of a sin-gle technique or a singe indicator, as is evidenced by our application of thiscomprehensive method in recent years. The soil △C method is a new technique.This paper first gives a discussion on the concentration distribution of △C inrelation to absorbed hydrocarbon and mercury, then describes anomaly charac-teristics of soil △C over the oil field, and finally deals with the application ofsoil △C in comprehensive geochemical oil-gas prospecting. It is proved that thesoil △C method is effective in the comprehensive geochemical oil-gas prospec-ting.

    References | Related Articles | Metrics
    PROPERTIES OF THE SPECTRAL IP ANOMALY IN COEXISTENCE OF IP AND ELECTEOMAGNETIC EFFECTS
    Luo Yanzhong, Xiong Zonghou, Cui Xianwen
    Geophysical and Geochemical Exploration. 1987, 11 (2): 106-114.  
    Abstract   HTML   PDF (650KB) ( 683 )

    According to numerical simulations, the present paper deals with propertiesof the spsctral IP anomaly when IP and electromagnetic effects coexist, indicatesthe spatial distribution shape and frequency characteristics of IP and electroma-gnetic induction on low-resistivity and high-resistivity polarized object, and veri-fies the reasonability of separating IP effect fIom electromagnetic effect byinversion of apparent complex resistivity frequency spectrum according to com-bination of two Kerr-Kerr models. The results of inversion of theoretical frequ-ency spectrum with this technique are utilized to illustrate the anomalous pro-perties of IP apparent frequency spectrum parameters. In addtion, a discussionis given concerning the effects of overburden and nonisotropy on the anomalyof spectral IP method.

    References | Related Articles | Metrics
    AN ATTEMPT OF USING ELECTRIC METHOD TO DETERMINE HYDROGEOLOGICAL PARAMETERS
    Zhang Jian, Wu Zhanchang, Yuan Yueguo
    Geophysical and Geochemical Exploration. 1987, 11 (2): 115-129.  
    Abstract   HTML   PDF (942KB) ( 554 )

    1. Determination of water-conducting coefficient(T) of water-bearing bedUnder the same condition, the thicker water-bearing bed and the coarsergrain are accompanied by higher apparent lateral resistance (Rt),representedby Rt = Q2·h2; moreover, the water-conducting coefficient(T) are also dependenton the thickness and structure of the water-bearing bed, as exprassed by T=K·h. It might therefore be seen that positive correlationship exists between Tand Rt, and that the water-conducting coefficients can be evaluated by drawingthe T-Rt correlation curve.Rt was determined by interpretation of field electrical sounding curves;Water-conducting coefficients of the aquifer were obtained on the basis of datafrom seven known withdrawal holes; Through a comparison between the calcu-lated T values and Rt values, the T-Rt correlation curves (being straight lineshere)of Q3 sand-pebble layer and Q2 argillaceous pebble layer have been estab-lished respectively. Calculation shows that T-Rt correlation coefficient of Q3 layer is y=0.964, suggesting the reliability of the correlation curve. On thebasis of T-Rt correlationship, a map of "distribution of water-conducting coeffi-cients" has been compiled, and some parameters have been figured out:permea-tion coefficient of Q3 layer is 80—120 m/day, Rt/T 2.13—2.66, K of Q2 layer40—50 m/day, and Rt/T 5—8.2. The evaluation of effective porosity(ψ)of water-bearing bedThe formula ρs-mS-nρw has been used for this purpose. In the field, elect-rical sounding technique was adopted to evaluate the resistivity(ρs)of water-be-aring beds in 11 known drill holes. The water samples collected in the field wereanalysed at laboratory. According to the diagram of relationship between strati-graphic water (ρw)and mineralization intensity (c) at 16℃,ρw value for eachdrill hole was determined; taking m=1.5,ψ value for each hole was evaluatedwith the above formula.values of Q3 layer range from 0.1796 to 0.3444,mostly 0.20—0.25, which are in agreement with the ψ value (0.25) obtained inlaboratory, and are also close to the empirical value(0. 23—0. 26) of gravity watersupply.

    Related Articles | Metrics
    A POTENTIAL FIELD VECTOR METHOD FOR DETERMINATION OF CONTACT PLANE
    Liu Hongxue, Zhu Jinlu
    Geophysical and Geochemical Exploration. 1987, 11 (2): 130-137.  
    Abstract   HTML   PDF (534KB) ( 411 )

    A potential field vector method for quantitative determination of parame-ters of contact plane is described in this paper. Based on the frequency spect-rum expression of potential field, this technique first obtains downward conti-nuation expression of gravity and magnetic anomaly function, and then, with thehelp of the normalized overall gradient nonlinear transformation function, ma-kes quantitative calculation for spatial position, buried depth and dip. In orderto overcome the unstability of the potential field function arising in the courseof its downward continuation towards lower half space, this technique adoptssmoothing factor for displacement of radial frequency with increasing depth.This method enables us to obtain stable calculation results with high preci-sion and to figure out directly spatial parameters of contact plane at depth.These merits have been demonstrated in this paper by means of tentative cal-culations with several models and some examples.

    Related Articles | Metrics
    THE APPLICATION OF AEROMAGNETIC SURVEY IN THE SITING OF NUCLE-AR POWER STATION
    Cai Zhenjing
    Geophysical and Geochemical Exploration. 1987, 11 (2): 138-139.  
    Abstract   HTML   PDF (198KB) ( 416 )
    Related Articles | Metrics
    THE APPLICATION OF SEISMIC DATA TO SYLVINITE PROSPECTING
    Qian Guanghua, Zhou Changxiang
    Geophysical and Geochemical Exploration. 1987, 11 (2): 139-143.  
    Abstract   HTML   PDF (725KB) ( 372 )
    References | Related Articles | Metrics
    TIIE REASON FOR TIDE EXIS-TENCE OF NEGATIVE VALUES IN MEASURED SUSCEPTIBILITY OF SPECIMENS
    Sun Lianchi
    Geophysical and Geochemical Exploration. 1987, 11 (2): 143-144.  
    Abstract   HTML   PDF (172KB) ( 588 )
    References | Related Articles | Metrics
    THE EVALUATION OF THE VELOCITY USING THE REFLEC-TION RAVEL TIME FROM A COMMON SHOT POINT
    He Wenneng
    Geophysical and Geochemical Exploration. 1987, 11 (2): 145-147.  
    Abstract   HTML   PDF (224KB) ( 356 )
    Related Articles | Metrics
    ORE-PROSPECTING EFFECT OF GEOPHYSICAL AND GEOCHEMI-CAL METHODS OVER A POLY-METALLIC ORE DEPOSIT
    Liu Kuiren
    Geophysical and Geochemical Exploration. 1987, 11 (2): 147-150.  
    Abstract   HTML   PDF (320KB) ( 376 )
    Related Articles | Metrics
    INDUCED POLARIZATION CHARACTERISTICS OVER HHE WATER-BEARING STRUCTURES
    Xin Yongshui
    Geophysical and Geochemical Exploration. 1987, 11 (2): 151-155.  
    Abstract   HTML   PDF (376KB) ( 405 )
    References | Related Articles | Metrics
    EXAMPLES OF WATER PROSPECTING IN URBAN AREAS USING DWJ-1 MICROCOMPUTER IP INSTRUMENT
    Shi Shenyi, Chen Weifa
    Geophysical and Geochemical Exploration. 1987, 11 (2): 155-157.  
    Abstract   HTML   PDF (251KB) ( 613 )
    Related Articles | Metrics
    SHALLOW AND SUPRASHALLOW REFLECTION SEISMIC TECHNIQUE UNDER STRONG INTERFERENCE AND ITS APPLICATION
    Wang Qinghai, Xu Mingcai, Liu Yongdong
    Geophysical and Geochemical Exploration. 1987, 11 (2): 157-158.  
    Abstract   HTML   PDF (206KB) ( 396 )
    Related Articles | Metrics
    A BRIEF ACCOUNT OF DWD-1 TYPE MICROCOMPUTER IP ME-ASUREMENT METER
    Xia Zhiping
    Geophysical and Geochemical Exploration. 1987, 11 (2): 159-159.  
    Abstract   HTML   PDF (126KB) ( 586 )
    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