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The Prediction Of Large And Superlarge Cu Mineral Resouces In The China With Comprehensive Information

Posted on:2004-09-11Degree:DoctorType:Dissertation
Country:ChinaCandidate:J C LiFull Text:PDF
GTID:1100360092996484Subject:Structural geology
Abstract/Summary:PDF Full Text Request
The great profits of large and super-large deposits have effected the continueous development to a country or regions, and become a hotly important subject since 1970s. The formation of super-large deposits have specical geological backgroud and enviroment. Its element association, mineral association, space-time distribution, metallogenic factors, formation functions and metallogenic medols show diversity, complexity and particularity. Up to now, the possibility to find out super-large deposits seems smaller and smaller in the surface. The comprehensive and reasonal deciphering of geological, geo-physical, geo-chemical and remote imagery data has turned to a effective way to prospect concealed super-large deposits by association of different subjects, points of view, method and thinking.With the national position extremely lacking cupper mineral resources, a set of methods to predict large and superlarge deposits is put forward in the paper on the basis of their distribution, metallogenic functions and associated problems, using the system of metallogenic prognosis on comprehensive information. It can be easily operated by the practise of large, super-large copper mineral resources prediction, showing good result.There are some primary conclusions in the paper, as follows:1. The space-time distributions of large, super-large deposits show clusterity, asymmetry and discontinuity. Super-large and large deposits, with medium and small deposits, make up a organic whole. The deposit clusters are our research objects. From the total distribution, controlling regularity of metallogenic factor association, and each other restricting functions between them can be studied. Deposits concentrated regions and anamoly concentrated regions can be sort out by comprehensive deciphering of goelogical, geo-chemical and geo-physical informations. Deposits concentrated regions existing large and super-large deposits are model units, in contrast, deposits concentrated regions with medium and small deposits are extendedmodel units, anomaly concentrated regions are assessment units. Our aim is the prediction of large and super-large deposits, and optimization of strategic targets.2. Geological observation data have the disunity and uncertainty characterastics. Original data are the objective signs based on present understanding of geological phenomena. The pridiction of mineral resources is a comprehensive explaining with exclusive theory and method. Usually the original data can' t satisfy their demand. We should build up intellectual database for the purpose of mineral resource prediction by analysing and judging the rich information from original data. On the basis of their retionales of geological, geo-physical and geo-chemical information, intellectual database based on comprehensive information for copper mineral resources have been built up in thepaper. We implement the pridiction of copper mineral resources with direct information and indirect information within it.3. The understanding of metallogenic regularity is deepened by comprehensive deciphering. The old basement' s strike is E-W, and the present direction of schistosity is the result of later reformation. The basement have metallogenic exclusiveness. The material components affect the metallogensis and evolution of later rock bodies and covers. The distribution of basement controls the distribution patterns of rock bodies and covers. Large and super-large deposits usually lie in the margins of basement, ie, margin controlling deposits. The structure also control the formation of large and super-large deposits, which commonly lie in the cross of different directions fractures or contacting belts of different tectonic units.4. As a whole, gradient belts of moho discontinuity correspond to rock bodies, the flat area correspond to basement. The large and super-large deposits offen lie in the gradient belts.5. The igneous bodies are mainly metasomatic type in China. Through Zhongtiao circle to Yantsi circle, himalaya circle, the...
Keywords/Search Tags:large and super-large depoisits, comprehensive information, characteristic analysis, metallogenic series, intellectual database.
PDF Full Text Request
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