This paper presents brief ioformation on the background of the establishment of the Cninase Academy of Geooxploration as well as its nature, tasks and composition, with an emphatic description given on the abundant achievements gained in the aspect of geophysical and geochemical exploration since its establishment, which has been promoting the edvance of exploration technology. In the end, it is pointed out that, for the purpose of building up the Chinese Academy of Geoexploration into the center of exploration technology, arduous efforts should be made in the aspects of scientific research, exploration and perpersonnel training.

Based on the regularity of the influence of foundation parameters upon the surface wave dispersion curve, this paper presents the surface wave spectral analytical method in which the dispersion curve of the measured surface wave velocitias is used to make inverse analysis of stratigraphic shear wave velocities of the foundation. The method has some remarkable advantages:it is rapid in speed and good in convergence, and the parameters obtained can reflect the character of actual fondation soil mass. Therefore, it is of practival value in foundation treatment and quality evaluation of expressway surface.

In the case that the signal-to-noise ratio and the number of times of superimposition are both rather low, the routine processing is not effective, and frequency division processing may be used. Seismic refleceted wave periods of different frequency bands show remarkable differences, and hence the separate automatic residkual statics and cross correlation statics could accurately evaluate residual time difference, the teverse Qcompensation and the superimposition of edaptive oblique plane elements could perform frequency compensation and phase compensation in a better way, increase the number of times of superimposition and raise the processing quality. On the basis of the above-described processing, the seismic reflection energies of various frequency bands are added to each other to obtain the final superimposition profile and raise the processing effect.

The utilization of well logging in the in-situ dotermination of ore bed grade is expected to be a research field with broad prospects, especially in places where coring is difficult to conduct. Techniques corrently used in China for grade determination by means of well logging can be grouped into two types. i. e. nuclear log and regression analysis. The former technique has been used to determine fluorite grade with the help of neutron-activation log, and the latter technuique has been applied to the glauberite and uraniferous phophorite exploration by using gamma-ray log.Both techniques have been carried out with success,and, as a result, a set of effective working procedures have been summarized.The determination of ore bed grade by means of well logging proves to be superior to the conventional method which basically consists of drilling and coring, visaal sampling and core assay. The edvantages of well logging lie in the following aspects: it conducts continuous measurement to obtain complete information on ore beds; the detedion radius of well logging can be much larger than that of coring; well logging can get rid of the errrors that exist in chemical analysis due to poor core recovery and random sampling. Therefore,well logging yields more reliable data for grade determination, as is clearly demonstrated by practical examples of three ore districts in China. Well logging may serve as a guide for reasonble sampliny and can be used effusively to work cot a program for further exploration. When core recovery is low or when certain ore beds are not intersected by drilling,well logging can be used. The result obtained by well logging is are the same as that obtained by core analysis because they are two different techiques that work independently,using different sampling methods and determine differeknt types of samples. Thus, the credibility of grade determination depends not only on measurement accuracy, but also on the actual grade of ore bed that the determination by each technique can represent, which suggests that the result of core assay can not be regarded as the only standard for grade of ore beds.

Using the V_zz extreme value distance of two upward continuation heights and the V_zzz zero value point for one of the heights, the present paper has obtained the solutions of such inverse problems as the position, buried depth, displacement, aip and dip angle of the inclined fault and the normal or reverse nature of the fault.

The present paper deals with some problems concerning the detection of coalfield depressed pillars with the high-density electrical method. The boundary element method was used to simulate the influence caused by variation in various factors of the depressed pillar upon the geoelectric anomalies, and the method for delimiting the depressed pillar is given.In view of the grave geoelectric interference that exists in the ore district, the paper suggests some technical measures for data collecting and processing. The results of the application show that the high-sensity electrical method can be used effectively to detect coalfield depressed Pillars.

The transient state characteristics of the electronic conductor are closely related to the properties of the electronic conductor. The observational parameter of the differential induced polarization method, namely the IPdifference △P, can reflect such characteristics.Using the theory of polarization transient state characteristics, the present paper makes a preliminary interpretation on the phenomenon that the basic shapes of IPdifference △P anomalies on three sorts of models (graphite plate, copper plate and iron plate)are different from each other. It is pointed out that on the basis of the basic shapes of IPdifference △P anomalies, one may distinguish anode-insoluble, weakly irreversible and strongly irreversible ore-wall rock solution systems and can eliminate interference of carbon matters. Field test results and application examples are also given in this paper. Information reflected by characteristics of polarization transient state is very abundant, and hence further research can help to distinguish IPanomalies and differentiate properties of field sources.

Based on distribution and association of trace elements in various sorts of media related to the Caijiaying leAd-zinc-silver deposit, the present paper has determined the indicator elements for this deposit and described characteristics of primary anomalies as well as regularity of their zoning in the deposit. In combination with geological characteristics of the ore deposit, the authors established its geochemical primary anomaly pattern, which has yielded fairly obvious results in the prospecting for blind deposits.