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中国大型、超大型铜矿床密集区综合信息定量预测
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  • 英文题名:The Quantitative Prediction of Large and Super Large Copper Mineral Deposits Concentration Area Based on the Comprehensive Information in China
  • 作者:李钟山
  • 论文级别:博士
  • 学科专业名称:地球探测与信息技术
  • 学位年度:2005
  • 导师:范继璋
  • 学科代码:081802
  • 学位授予单位:吉林大学
  • 论文提交日期:2005-04-01
摘要
本文在综合信息理论和方法的指导下,选择大型、超大型铜矿床密集区和异常密集区为研究对象,系统地总结了中国铜矿床的类型及时空分布规律、大型、超大型矿床的基本特点以及综合信息解译的原理和方法。以地质为先验前提,把地质、地球物理、地球化学、遥感和矿产等信息进行关联,对控制大型、超大型矿集区的控矿因素进行了深入的探讨,总结了一套操作性极强的综合信息预测大型、超大型矿床密集区的思路和方法,首次运用BP神经网络和特征分析分析方法结合运用在资源定量预测中,共预测超大型矿集区13个,资源总量7887万吨、资源潜力7136万吨。
The issue of large and super large mineral deposits(L&SLMD)has been a popular subject on the geo-sciences in the world since 1970s. Academician Tu Guangshi pioneered in the systematically theoretical research, which expanded the study fields of large and super-large deposits.The theoretical research of the large and super large mineral deposits, always took the mineral deposit as the research object in the past, emphasizing summaries of the geology characteristic and geology metallogenic background of the large and super large mineral deposit. This thesis combines with the research accomplishment of last few years national and several research Institute , takes the concentration area of large and super large copper mineral deposits as the research object, under the leading of the comprehensive information theories , thoroughly predicts the large and super large copper mineral deposit of concentration area and abnormal concentration area using the way of quantitative prediction. The main results of the report are as follows:1. By researching the characteristics and regularities of Chinese copper deposits distribution, we have discovered that there is a relation of "Cranes standing among crowds of chickens " between large & super large and medium & small copper mineral deposit." Crane" here means large and super large copper mineral deposits;" Chicken" means medium and small copper mineral deposits correlative with large and super large copper mineral deposit.2. Basing on national copper element abnormal surplus, combining the base and structures, especially the distribution characteristics of the potential base and structures, under the leading idea of "Cranes standing among crowds of chickens ", we have divided them into 47 model units of large and super large copper mineral deposit concentration area, and 60 prediction units.3. Taking geology as the premise first, correlating the information's, such as geology, geophysics, geochemistry, RS and mineral etc. By thoroughly researching on the ore control
    factor of large and super large copper mineral deposits, we have established a mineral prospecting model based on comprehensive information for large and super large copper mineral deposits.4. Through the research, we have detailed the principles and methods of the comprehensive information translation, carried on the systemic research on the Metallogenic specialization of the old basal and Metallogenic specialization of neutral & acidity magmatic rock or Metallogenic specialization of cap rock etc.5. We have worked out a set of operative ways of thinking and methods of predicting large and super large copper mineral deposits of concentration area.6. We have divided into 107 units of large and $uper large copper mineral deposit concentration areas in our country. Bp nerve network and characteristic analysis are combined in the first time and carried out a contrast analysis and using the qualitative evaluation of large and super large copper mineral deposit concentration areas. It is scientific and reasonable to select variables that control the large and super large copper mineral deposit concentration area becoming bigger and richer. The 107 model units and forecast units are arranged into a line according the category and we have carried out the quantity forecast, deciding upon 13 super large copper mineral deposit concentration areas and forecasting resources of 78870000 tons and potential resources of 71360000 tons.7. Using GIS as a platform, we have preliminarily drawn up the forecast map for the deposits of large and super large copper mineral concentrations and put forward, together with our tutor, the proposal of using GIS in mineral resource estimate and the key to really attain the policy-making analysis purpose is to establish an intellectual database, independent and dependent variables map-layer, prediction map-layer, and then finish the semi-automatic, the automation and the intellectualized system in minerals resource appraisement.8. logic design(LD)It means the logic model of structure and describes the minimum space entity correlation. It includes the following contents:A. Space data coordinates systemIt is required that the geological geophysical exploration and geo-chemical exploration and remote sensing data have the same coordinates system, the same coordinates units should use the geography coordinates instead of the various assumption coordinates on blueprint.B. The piling structure of data on special subjectsTo expresses the correlation in the different data of special subject, such as projection of
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