The Gejiu Takamatsu Orefield Information Metallogenic Prediction

This paper is one part of the science and technology cooperation item between Yunnan province and university/academy named The Research of Metallogenetic and Mineral Resource Predication in the Deep and Periphery of Gejiu Tin Deposit (2000YK-5), and is emphasized particularly on the mineral resource predication in Gaosong field. In the paper, geological, geochemical and geophysical information is analysed, picked up and synthetized mainly with the methods of information theory, time-space series and fractals. Then synthesis mineral resource information analysis and predication system is set up. With this system, 18 predication zones classed in three grades in Gaosong field are found. Fortunately, one of the predication zones is validated with well effect.Gejiu superlarge Sn-ploymetal deposit is the important tin producing area in our country and world. Up to present, its exploration history has been two thousand years, specially after the massive exploration after Liberation, the resource crisis is very severe. And it is necessary to explore other new resource base. Gaosong field is the only field in which work degree is low, and there is only a No. 10 group being mined. While some geological, geochemical, geopgysical data and a few drill data of Gaosong field having been accumulated after Liberation, and with the work of this time, it can be satisfied to predicate mineral resource in this field. So the research is concentrated in Gaosong field.Just because any single kind of mineral resource information can't indicate the existence of mineral resource exactly while the synthesis of many kinds of mineral resource information can indicate the existence of mineral resource better, it can obtain better effect using synthesis mineral resource information to predicate the existence of mineral resource. Synthesis mineral resource information predication has been attempted in our country, and some obtained some effects. But because of the diversity, indirection and randomicity of mineral resource information, the classical data processing technique is difficulty to get marked effects. Thus the non-deterministic methods such as the information theory, time-space series and complexity are used to analyze, pick up and integrate the geological, geochemical, geopgysical and remote sensing information. At the same time, Synthesis Mineral Resource Information Analysis and Predication System (SMR1APS) has been written.With the example of mineral resource prediction research of Gaosong field, the following results are obtained:Information is the embodiment of existence, and synthesis information should be added with the grade self-similar method.The time-space series analysis method containing randomicity on the base of continuity is formed after the analysis systems of time series, space series and fractals are compared.Geochemical model of Gaosong field is set up. Qualitative geological information of Gaosong field such as fault, stratum, drape, shape of granite and the harmony between granite and drape is analyzed quantificationally. Electricity sound information is managed quantificationally and explained synthetically.Synthesis Mineral Resource Information Analysis and Predication System (SMRIAPS) is set up. In this system, many kinds of information are added with the grade self-similar method. Owing to the method of information theory, different kinds of geological information can be syncretized better, and accord to the practice geological understand and law.With the system, 17 predication zones classed in 3 grades is found, and No. 1 predication zone is validated with the better effect.