共查询到18条相似文献，搜索用时 156 毫秒
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以安徽铜陵凤凰山矿田为例.通过综合地质研究,构建了矿体定位预测概念模型.在地质勘探数据和物化探数据集成的基础上,采用三维地质建模技术,对地层、构造、岩浆岩、矿体等地质体进行了推断和圈定,构建了地质体的线框模型与块体模型.基于定位预测概念模型和地质体三维块体模型,通过地质空间定义和立体单元划分,建立了岩体及其表面形态起伏、接触带、地层、褶皱、断层等控矿地质因素的三维栅格场模型.在定量分析控矿地质因素与矿化分布的关系的基础上,建立了反应这种关联关系的矿体立体定量预测模型.预测模型提供矿田深部(-1000m标高以上)所有50m×50m×50m立体单元的铜品位、铜金属量和含矿概率的预测结果.基于预测结果圈定了4个深部找矿立体靶区,为深部找矿工程的设计、布置提供尚未发现的臆伏矿体的位置、品位、金属量等信息的指导. 相似文献
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以安徽铜陵凤凰山矿田为例,通过综合地质研究,构建了矿体定位预测概念模型。在地质勘探数据和物化探数据集成的基础上,采用三维地质建模技术,对地层、构造、岩浆岩、矿体等地质体进行了推断和圈定,构建了地质体的线框模型与块体模型。基于定位预测概念模型和地质体三维块体模型,通过地质空间定义和立体单元划分,建立了岩体及其表面形态起伏、接触带、地层、褶皱、断层等控矿地质因素的三维栅格场模型。在定量分析控矿地质因素与矿化分布的关系的基础上,建立了反应这种关联关系的矿体立体定量预测模型。预测模型提供矿田深部(-1000m标高以上)所有50m×50m×50m立体单元的铜品位、铜金属量和含矿概率的预测结果。基于预测结果圈定了4个深部找矿立体靶区,为深部找矿工程的设计、布置提供尚未发现的隐伏矿体的位置、品位、金属量等信息的指导。 相似文献
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甘肃文县阳山金矿田地质特征及控矿地质因素分析 总被引：12，自引：1，他引：11
甘肃文县阳山金矿田是中国最大的金矿床,最近发现于西秦岭的勉略缝合带附近,它是由赋存于泥盆系三河口群地层中的受文县弧形构造带控制的类卡林型金矿系统。对阳山矿田安坝矿段钻探和坑探工程资料的统计表明,所有金矿体均受安昌河-观音坝断裂系统(含主干断裂和次级断裂)控制,多数金矿体定位于断裂构造与泥质、粉砂质千枚岩的复合部位,少数定位于花岗斑岩脉及其接触带,说明印支期花岗岩浆活动并不是前人认为的主导金矿化的地质条件。结合区域地质分析,本文认为三河口群及其下伏碧口群等地层在早侏罗世造山事件为阳山金成矿系统提供了成矿流体和物质,三河口群泥质、粉砂质千枚岩是成矿流体聚集和成矿金属卸载的有利空间。沿安昌河-观音坝断裂系统侵位的矿前花岗斑岩脉,尽管数量较少,但也是成矿流体聚集、圈蔽和成矿的有利场所。更为重要的是,花岗斑岩脉与地层之间的能干性具有显著差异,使接触带在后期碰撞造山过程中演化为韧-脆性变形带,进而成为十分理想的成矿流体循环、聚集和金矿化空间。 相似文献
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湖南古丈凉亭坳重晶石矿床产于古丈逆断层南东侧之北东向次级断裂破碎带中,赋矿围岩主要为上震旦统陡山沱组黑色页岩、泥质白云岩.矿体呈脉状、透镜状产出,主矿体延伸稳定,矿石质量好.围岩蚀变主要为重晶石化、硅化、碳酸盐化和黄铁矿化.通过对本区矿床地质特征、矿床成因的分析,认为本区重晶石矿为低温热液型矿床,Ⅰ号矿体深部及南东桐木... 相似文献
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叙述了粤东地区各期火山活动的地质特征，指出火山岩富含成矿元素，可给银多金属矿床带来成矿物质。依据矿床的成因-工业类型分类原则，将该区火山-次火山岩型银多金属矿床划分为两大类6亚类。并对各类矿床的赋矿围岩、控矿构造、与成矿有关的火山岩、矿体形态产状、近矿围岩蚀变、矿石矿物组合等主要地质特征进行描述。阐述了控制矿田、矿床(体)的构造条件、以及火山作用的控矿地质条件。 相似文献
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基于对地质体抽象化、三维可视化、TIN模型、布尔运算方法研究基础上,使用澳大利亚Micro-mine软件平台,建立个旧锡矿芦塘坝东矿区三维地质模型,包括地质体表面和地质体实体模型,可为该区矿体进行定位、定量分析和预测提供依据。 相似文献
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This paper discusses the strategy for successfully predicting the location of potential hidden ore bodies in aged ore field,and presents the result of location prediction of hidden ore bodies in Fenghuangshan ore field,Tongling.Innovative conceptual targeting procedures based on a genetic understanding of mineralization systems,carefully geological investigation and correct deduction,together with new geochemical and geophysical technology and integrating of comprehensive information are all very important for the successful prediction.In the aged Fenghuangshan ore field,through researching by application of the metallogenic theory of polygenetic compound ore deposits and triple-frequency induced polarization method and exploration tectono-geochemical method,we predicted location and quality of hidden ore bodies.According to the prediction,hidden high quality Cu-Au ore bodies of skarn type and porphyry type have been discovered. 相似文献
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安徽铜陵凤凰山铜矿是铜陵矿集区内最典型的矽卡岩型铜矿床之一,也是凤凰山矿田内规模最大的铜矿床。矿区内新屋里岩体属于高钾钙碱性系列,主要岩性为石英二长闪长岩和花岗闪长岩。岩石地球化学特征表明凤凰山中酸性侵入岩岩浆属于壳幔混合型,原始岩浆来源于上地幔碱性玄武岩区并有地壳物质混染,在岩浆不断演化过程中有外来物质的加入,成岩过程以混合作用为主。凤凰山铜矿体分布于岩体与大理岩的内矽卡岩带上,岩体中铜含量较高。铜矿体是岩浆期后热液交代碳酸盐地层形成的。矿体的空间分布受构造变形-岩浆侵入高温高压作用的双重控制。矿化经历了从高温矽卡岩阶段到中低温热液阶段的多期次复合成矿作用。 相似文献
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Although the Tongling district is one of the most important Cu districts in China, exploration strategies need to be urgently updated to achieve a more predictive method for discovering hidden ore bodies. This paper presents a case study showing how new exploration strategies were developed and successfully used to discover a hidden ore body in the Fenghuangshan ore field of the Tongling district. All previously discovered ore bodies in the Fenghuangshan ore field were Cu skarn deposits located where dilational fault zones cut the contact zone of the Xingwuli granitoid complex. The features of the ores and the related magmatic rocks and hydrothermal alteration suggest that porphyry copper deposits are also likely to be present in the ore field. After assessing spatial controls on ore formation, ore-related indicators numerical simulating the coupled thermal–hydrological–mechanical processes during syn-deformation cooling of the Xingwuli Intrusion were used to choose a target area to the south of the Fenfhuangshan mine. In this target area, we have carried out an exploration program involving mapping, rock chip sampling for Cu in the fractured and altered rocks, and pesu-random triple frequency induced polarization (IP) and the controlled source audio-frequency magnetotellurics (CSAMT) surveys. Synthesis of the data obtained in this program identified a target that was subsequently drilled. This test hole demonstrated the presence of high grade Cu ores typical of both skarn and porphyry copper deposits. 相似文献
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Abstract. Facilitating more predictive ore discovery is becoming an increasingly challenging task for the resources geology research and exploration industry. The numerical geodynamic modeling, which uses numerical code to reproduce feedback coupling of geodynamic processes in the computer, is one of endeavors for forming sound predictive exploration strategy by thoroughly understanding the mineralization system and its controlling factors. The FLAC (Fast Lagrangian Analysis of Continua) is a two-dimensional finite-difference code for studying the mechano-thermo-hydrological behavior of a continuous porous medium after it reached equilibrium or steady plastic flow. We used the FLAC to simulate the syn-deformation cooling and fluid flowing after the intrusion was emplaced and solidified in the Fenghuangshan ore field, Tongling Cu district for guiding analysis of ore-controlling factors and selection of the exploration target area. The results of numerical computation demonstrate that the dilatant deformation zones along the contact of the intrusion control the fluid focus and the location and scale of ore bodies. Further more, the simulation results suggest a most prospective exploration area in the south high dilation zone, where the subsequent exploration supported the prediction and the test bore hole disclosed the high quality copper ore bodies in the target. This example has demonstrated the positive role of the numerical geodynamic modeling in facilitating predictive ore discovery. 相似文献
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铜陵凤凰山岩体SHRIMP锆石U-Pb年龄与构造变形及其对岩体侵位动力学背景的制约 总被引：31，自引：0，他引：31
地球动力环境对岩浆来源和侵位机制具有重要的控制作用.铜陵矿集区中生代中酸性侵入岩和大规模成矿作用有密切关系.凤凰山岩体为凤凰山矿田的主要组成部分, 主要岩石类型为花岗闪长岩、石英二长闪长岩.根据精确锆石SHRIMP测年结果, 凤凰山岩体206Pb/238U年龄为(144.2±2.3) Ma, 是晚侏罗世形成的一个典型岩体, 和铜陵矿集区主要成矿岩体的形成时代一致.接触带构造变形特征显示岩体侵位受控于区域左旋剪切应力场作用.内部构造变形特征表明凤凰山岩体在深部主要为左旋螺旋式强力上升, 浅部为气球膨胀式主动侵位.岩体形成时代及构造变形特征表现出晚侏罗世铜陵矿集区和成矿有关的侵入岩系列的形成可能和古太平洋板块的向北斜向俯冲所导致的左旋剪切应力场有关. 相似文献
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如何有效地对储量危急矿山的深边部的潜在隐伏矿体进行预测和勘查是现在矿山找矿勘查面临的一个难题.本文从理论上论证了综合信息论的重要意义,提出储量危急矿山深边部找矿预测的4条重要原则:以先进的成矿理论为指导,开展细致地质观测和准确的地质推断,采用先进的地球物理和地球化学技术探测间接的找矿信息和利用计算机进行高效的多元信息集成.运用这些原则在铜陵凤凰山铜矿深边部开展了综合找矿研究,其预测已被钻探和坑探验证,并首次在该区找到了优质的斑岩型铜金矿体. 相似文献
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The metallogenic theory of polygenetic compound ore deposit is the Important basis for location prediction of hidden ore deposits in diwa regions.It can play an important role in each step of prediction research,targeting procedure,acquiring information and integrating information.In this paper,the authors discusses how to construct geological concept by using of the metallogenic theory of polygenetic ore deposits for predicting targeting area,to arrange investigation and detection for getting enough useful information,and to analyze and integrate information for reaching a trustful prediction conclusion.According to these strategies,we conduct a successful prediction of location of hidden ore bodies in the outer of the Fenghuangshan copper mine,a principal producing mine in Tongling Cu-Au district. 相似文献