云南老君山成矿区找矿信息集成及勘查靶区优选

【作者】 伍伟；

【导师】 秦德先；

【作者基本信息】 昆明理工大学 ， 矿产普查与勘探， 2010， 博士

【摘要】 本博士论文“云南老君山成矿区找矿信息集成及勘查靶区优选”是结合校企合作项目“云南老君山成矿区找矿信息集成、勘查靶区优选和研究”和“马关都龙曼家寨锡锌多金属矿床三维立体可视化数学—经济模型研究”(合同编号：6193)的科研需要而选题的。改革开放以来,随着经济的飞速发展,我国对矿产资源的需求与日俱增,而目前我们国家各主要矿种的资源保证程度相当低,矿产资源的形势非常严峻,严重威胁着国家的经济安全和社会稳定。为了改变这种形势,我们必须依赖于科技进步,积极探索新的、更有效的现代成矿预测理论与高新技术有机结合的矿产资源预测体系,整体提升我国矿产资源勘查评价水平和科学预测能力,寻找和发现新的矿产资源品种和类型,增加矿产资源的储备,为我国经济安全、高效、持续发展提供资源保证。本博士论文结合课题的研究需要,瞄准我国矿业和地质勘探行业发展的前沿,在老君山锡锌多金属成矿区,应用数字矿床的原理和方法,对多元地学找矿信息进行集成,在此基础上,采用综合信息成矿预测理论方法,在计算机及高新技术(GIS和矿业专用软件)支持下,开展了综合信息成矿预测及勘查靶区优选。在充分借鉴和吸收前人研究成果的的前提下,开展了广泛的野外及现场地质调查和室内的综合研究工作,主要包括矿床的宏观地质研究和微观地球化学研究,各种测试资料的综合分析研究、矿床类型的厘定及成因模式的探讨、矿床地物化多源地学信息特征的分析和综合信息找矿模型的研究、控矿因素和找矿标志的分析、基于GIS空间分析的综合信息成矿预测研究、基于数字矿床的矿床深边部成矿预测研究等,通过上述研究主要得到以下成果：1、通过矿床地质研究,结合变质岩的矿物岩石学特征,进行了变质原岩恢复,发现并证实了老君山成矿区变质类岩的原岩为一套海底火山—喷流沉积岩石。并在对老君山成矿区矿床地质及成矿规律研究的基础上,把老君山成矿区内的矿床划分为三大成矿系列十种矿床类型。2、运用地质规律+地、物、化数字空间信息+计算机及其软件的集成技术,对各研究阶段获得的各种成矿信息进行综合研究和有机集成,在此基础上主要运用单元格划分法,采用改良的二态赋值法对老君山成矿区各个变量进行赋值,并运用GIS软件进行属性计算,通过这些步骤完成老君山成矿区综合信息模型的建立,并在此基础上进行综合信息成矿预测。最终得到了整个矿区的综合得分。3、在综合得分的基础上,首次引入了层次分析法进行权重值的计算,然后运用地质异常找矿靶区定量评价的数学模型,对已圈出的成矿有利地段进行筛选及级别划分,此次运用找矿概率对其进行划分。我们分别把曼家寨和南秧田作为参照矿床,通过计算共得到,I级靶区1个,Ⅱ级靶区4个,Ⅲ级靶区6个。4、首次在马关都龙曼家寨矿段建立了数字矿床模型,实现了矿床各有用信息的数字化和可视化。通过变异函数的计算和模拟,建立了矿床的理论变异函数模型,初步讨论了矿体形态的空间变化特征及其影响因素。5、总结了矿体的矿化空间富集规律：通过矿床模型,分别对矿体走向、倾向和垂向,按一定的步长计算了不同边界矿床中锌、锡的品位和吨位,并运用其他辅助计算机软件制作了三个方向的锌、锡品位和吨位的变化图,实现了运用数学和图形的方法来总结矿体的矿化空间富集规律,变传统的定性分析为定量分析。6、在数字矿床的基础上,开展了曼家寨矿段深边部的成矿预测研究,提出了沿矽卡岩走向、F0、F1断裂寻找Sn、Zn矿体边部延伸矿的找矿靶区,这既为地质统计学理论与数字化矿床在成矿预测方面作了全新的尝试,同时也为矿山深部找矿提供了线索。更多还原

【Abstract】 The doctoral dessertation title of The Prospecting information integration and investigation target area optimal in Lao Junshan tin zinc polymetallic minerogenic region is selected based on the School business cooperation project"The Prospecting information integration and investigation target area optimal and research in Lao Junshan tin zinc polymetallic minerogenic region and the three-dimensional visualization mathematics-economic research of tin-zinc polymetallic deposit in Manjiazhai, Dulong, Maguan(contract serial number:6193).Since the reform and opening, with the rapid development of economy, it is growing day by day to our country demand of the mineral resource, but now the resource guarantee degree of main ore kinds of our country is quite low, and the situation of mineral resource is very severe, so it has already severely threatened the economical security and the social stabilization of our country. To change the situation, we must depend on the progress of science and technology, and research actively the new and more effective mineral resource prognosis system of united modern metallogenic prognosis theories and high-tech, to advance whole the level of the mineral resource survey and estimation and the ability of scientific prognosis of our country, to search and find new mineral resource kinds and types, to increase the reserve of mineral resource, to provide the resource guarantee for the secure, highly effective and continual economical development of our country.On the based of the demand of the item, to aim at the front of the mineral industry and the geological survey industry of our country, to applicate the principle and method of digitized deposit,carry on the integration to th multi-dimensional prospecting information. On this foundation,to adopt the method of the comprehensive information matallogenic prognosis and the computer and the high-tech (GIS and the special software of the mineral industry), the doctoral dissertation carried through the research of the comprehensive information matallogenic prognosis and optimal investigation target area in Lao Junshan tin zinc polymetallic minerogenic region.In the premise of the full reference and absorption to the research results, we has developed the widespread field and underground geological investigation and the office synthetic research work, mainly includes:the macroscopic and the microscopic geological features research of deposits, the synthetic research of all kinds of isotope datum, the types of deposits and the discussion of the genetic model of deposits, the analysis of the geological, geophysical and geochemical characters of deposits and the research of the comprehensive information prospecting model, the analysis of the factors of control mineralization and the prospecting criteria, the research of the comprehensive information metallogenic prospecting based on the GIS space analysis, the research of the prospecting of the deposit depth and nearby based on the digitized deposit and so on, mainly obtains the achievement through the above research:1. Through the ore deposit geology research, unioned the mineral petrology character of metamorphic rock,having carried on the metamorphic rock restoration, discovered and proved the metamorphic rock is a set of oceanic volcano-spout deposit rock in Lao Junshan minerogenic region.On the basis of research about ore deposit geology and mineralization rule for Lao Junshan minerogenic region, divided the ore deposit in Lao Junshan minerogenic region into three metallogenic series and ten kinds of the deposit type.2. Using the geological rule and the thing, melts the digital space information and computer and the software integrated technology, each kind of mineralization information obtains which to each research stage conducts the synthetic study and the organic integration, On this foundation main utilization unit standard allocation method, Uses the improvement two condition valuations to carry on the evaluation to Lao Junshan region each variable,And carries on the attribute computation using the GIS software, Completes the Laojun minerogenic region synthesis information model through these steps the establishment, And carries on the synthesis information mineralization forecast in this foundation. Finally obtained the entire mining area synthesis score.3. On the foundation of synthesis score, introduced the analytic hierarchy process to compute the weight value first time, Then utilization the quantitative evaluation mathematical model of geologic anomaly prospecting target area, to the mineralization advantageous land sector which iriss out has carried on screening and the rank division, Carries on the division by using the prospecting probability. We separately Man Jiazhai and Nan Yangtian as the reference ore deposit, After computed,we got oneⅠlevel target,fourⅡlevel target and sixⅢlevel target. 4. Has established the digital ore deposit model in Man Jiazhai ore section first time, and has realized the ore deposit each useful information digitization and the visualization. Has established the ore deposit theory variation function model through variation function computation and simulation. Initially discussed the ore body shape spatial variation characteristic and the influence factor.5. Summarized the mineralization rule of ore body, Through ore deposit model, separately the trend, tendency and vertical of ore body, has calculated the zinc、tin personal status and the tonnage in the different boundary according to certain length of stride, and utilized other computer software to manufacture the zinc、tin personal status and the tonnage change chart at three direction.Has summarized mineralization rule of the ore body by mathematics and the graph, changes traditional the qualitative analysis for the quantitative analysis.6.0n the basis of the digitized deposit, through the analysis of the mineralizing isoline in Man Jiazhai, we carried out the research of the trend of Skarns%theF0、the F1 break seeks Sn、Zn ore body in the border and depth of the deposit, not only is one brand-new exploration of the geological statistics theory and the digitized deposit in metallogenic prognosis aspect, also provided the clue for the prospecting in the mine depth.更多还原