The present paper deals with the techniques and effects of applying the high-precision aerogeophysical integrated survey to searching for gold,potash salt and groundwater and conducting lithostructural mapping,with the emphasis placed on the following aspects:the application of Fparameter and gray systematic theory to the prognosis of gold deposits;the utilization of linear regression combined with principal component analysis to eliminating K₂O interference and delineating potash prospecting targets, the use of airborne electromagnetic -45° phase method to dividing water qualities,estimating water quantity and prospecting for groundwater;the employment of aeromagnetic,gravity and gamma spectral integrated information to conducting lithostructual mapping.

The sea surface heights determined by satellite radar altimetry are easily converted into gravity anomalies. Satellite altimetric data from closely spaced Geodetic Missions of both GEOSATand ERS-1 were combined to achieve the highest resolution gravity coverage over the South China Sea region. Many interesting and previously uncharted features are revealed in this new gravity map including spreading ridge, transform faults, elastic plate thick ness of lithosphere, behaviors of continental margins, and new sedimentary basins.

The present paper describes theτ-p transformation,t he“adjustable t hreshold value”and“target cir-cling”techniques,which are utilized in processing shallow seismic prospecting data to abstract Rayleigh waves,re-flected p-waves and refracted p-waves simultaneously.Results of calculation for models indicate that these techniques can be satisfactorily employed for multiwave prospecting as well as for conventional single-type-wave prospecting.

The application of nuclear magnetic resonance to direct water exporation is a new technique.The present paper deals with the principle and instrumental equipment of this technique and,with the test result of NUMISsystem in a certain area of Henan Province as an example,illustrates the availability of this technique in water exploration.

This paper describes briefly the Rough Set(RS) theory, a new theory in intelligent data processing, discusses the method of decision analysis based on RS, advances an optimization idea and method for continuous attributes discretization, and probes into the problem of geochemical sample classification with this method.

Impedance inversion is an important method in processing seismic lithologic inversion. The key of the inversion lies in the demarcation of the high-precision reflection coefficient amplitude and the acquisition of high-precision impedance initial value.In processing impedance inversion,the choice of impedance initial value is very important, because different impedance values will be acquired when different impedance initial values are used, and this will affect the precision of lithologic interpretation precision. In this paper the author first advances the impedance scanning technique and proves it to be a method for acquiring higher precision impedance initial value by logs data and seismic data inversion result. The coincidance ratio of impedance initial value obtained by using impedance scanning to impedance initial value of the logs is about 99%.The impedance scanning technique provides a practical way and lays a foundation for high precision impedance and seismic lithologic inversion.

Regional geochemical survey for Pt,Pd and Au in the western Bushveld Complex,South Africa,has been under way for a number of years using Pt,Pd and Au analyses of the stream sediment and residual soil samples from Rustenburg area.The exploraion has led to the discovery of many unknown platinum mineralisation horizons in Bushveld Complex.It is worth while to note that at the boundary between the Main and Upper Zone a new Pt,Pd and Au anomalous zone has been discovered.

Using regional geochemical exploration data, the authors figured out moving window contrast values through window moving average operation,delineated single-element anomalies and multi-element accumulative (multiplicative) anomalies according to contrast values,and drew single element and multi-element background diagrams,accumulative (multiplicative) multi-element contrast anomalies and background diagrams,which make up the locating prognostic chart for the ore-prospecting target. The effects of its application in Xinjiang and a certain ore belt in Qinba area are described in this paper.

Based on “planar” rock survey and “multi daughter sample” sectional rock survey, the authors conducted evaluating of prospecting potential for Sunjiazhuang intermediate acid complex body and made follow-up survey for mineralization in neighboring areas. The main indicator elements and associated elements were determined, and the Cu-dominant multi-element composite anomaly from porphyry mineralizastion was delineated, with porphyry mineralization discovered at the concentration center of the Cu anomaly. Around Sunjiazhuang complex body there exists a zonal distribution pattern of porphyry mineralization contact metasomatic mineralization hydrothermal polymetalic mineralization.

Integrated geologic,seismic sounding,gravity and magnetic field and paleomagnetic studies show that the Alxa Dunhuang landmass is a rigid block with a complete,unified Precambrian crystalline basement.Bordered by Ruoqiang-Xingxingxia fault on the west and Helan Mountain on the east,and wedging itself beneath Qinghai-Tibet plateau on the south and Xingmeng Paleozoic fold system on the north,it occupies a rather large area(91°E～106°E,38°N～42°N).Being an important component part of the North China platform,the Alxa-Dunhuang landmass not only hindered the northward transmission of compressive principal stress of the Indian plate but also caused the close connection of the Tarim platform with the North China platform to form the greater Chinese platform.

In this paper,the field of magnetic dipole in the conducting horizontal cylinder is decomposed into 1stdegree field and 2nd degree field of single magnetic pole,field inside the cylinder and field outside the cylinder.Then the fields of the two single magnetic poles are superimposed upon each other to form the field of magnetic dipole.With programs compiled,the 2nd degree magnetic fields of imaginary and real components of the frequency response function for the general field are calculated separately.