【作者】 徐述平；

【导师】 邓军；

【作者基本信息】 中国地质大学（北京） ， 矿物学、岩石学、矿床学， 2009， 博士

【摘要】 胶东以约0.3%的国土面积占有中国约25%的黄金储量,是中国最重要的金矿集中区和黄金产区,该区经历了长期的构造—岩浆活动,形成了复杂的构造格架和一系列岩浆岩。近年来,广大地质工作者深入贯彻“理论先导、攻深找盲、瞄准大带、重点突破”的找矿思路,金矿床研究和普查找矿不断取得突破。招平断裂带是胶东地区最重要的金成矿带之一,前人做了大量研究工作,多侧重于矿床尺度的观测和分析,对整个成矿带进行系统研究和总结,进而构建各类金矿类型及深部矿体勘查模型方面还缺乏系统性。勘查实践证明,找矿的成功率越来越依赖于成矿规律研究和成矿预测的开展,而在信息集成基础上建立勘查模型指导找矿已越来越受到重视。本文运用成矿系统的理论和方法,在充分收集、消化前人研究成果和工作资料的基础上,结合科研项目和本职勘查工作,开展金矿调查研究,系统采集各种岩石和矿石样品,开展大量的测试分析工作,总结成矿地质背景及矿床地质-地球化学-地球物理特征,分析招平带成矿系统各要素,解剖典型金矿床,总结控矿规律,建立勘查模型,开展成矿预测。论文总结了招平断裂带分段地质特征、构造控矿型式、成矿规律、找矿方向和成矿模式,金矿带产出石英脉型(玲珑式)、蚀变岩型(焦家式)及过渡型(灵山沟式)三种金矿类型,具有构造-蚀变—矿化的水平分带性,自黄铁绢英岩化碎裂岩→黄铁绢英岩化花岗质碎裂岩→花岗质碎裂岩→碎裂状花岗岩,岩石的破碎程度逐渐降低(碎粒岩到碎裂岩),矿化逐渐减弱(浸染状、密集网脉状到稀疏脉状矿化),蚀变分带明显(黄铁绢英岩化、绢英岩化、硅化到钾化带)。断裂带多期叠加成矿作用明显,至少有金成矿期和银多金属成矿期两期成矿作用复合,两期成矿的成矿元素不同,金成矿期划分4个成矿阶段,银多金属成矿期划分3个成矿阶段。根据断裂带微量元素特征,探讨了成矿物质来源,估算了断裂带资源潜力。在多元信息集成的基础上,构建了招平断裂带六类勘查模型:矿床(体)综合预测模型、矿床(体)定位综合预测模型、焦家式金矿地质-地球物理勘查模型、焦家式金矿地质-地球化学勘查模型、玲珑式金矿地质-地球物理勘查模型、深部矿体定位预测模型。开展了成矿预测,圈定成矿预测区11处,经工程验证,取得了较满意的找矿效果。更多还原

【Abstract】 The Jiaodong peninsula, accounting for 0.3% of China’s land area and hosting 25% of the nation’s gold reserve, is one of the most important gold mine concentrating and gold production area. This area underwent a long tectonic-magmatic evolution, and formed a complex geological structural framework and a series of magmatic rocks. Putting into practice the prospecting idea of“Theory direct, exploring depth and blind, focusing on huge belts, breakthrough in key areas”, gold deposit research and preliminary geological survey and prospecting have made important progress in recent years.The Zhao-Ping fault zone is the most important gold metallogenic belts in Jiaodong. Lots of research focusing on the deposit-scale observation and analysis were done. While systematic research and summaries of the whole gold belt are weak, and lack of systematic build of deep gold ore body’s exploration models of different gold deposit types. It has been proved by the prospecting practice that the successes of mineral deposit prospecting rely on the prediction based on metallogenic regularity studies. Hence, more importance has been attached on the prediction of exploration model building based on geological information integration. Field observations were done, and collected samples of rocks and ores were tested and analyzed. Directed by the metallogenic theory, and in combination of scientific research projects and exploration work, I collected and analyzed systematically the existing data and research results. Summaries were done to geological settings, mineral deposit geology, and regional geochemical and geophysical characters. Analyses were done to factors of gold metallogenic system of the Zhaoping fault zone. Gold mtallogenic prediction was done according to the established exploration model based on summaries of metallogenic regularities and detailed analyses of typical gold deposits.This paper summarized the segment geological features of the Zhaoping fault, Ore-Control Structures, metallogenic regularities, gold prospecting area and metallogenic model. There are three types of gold deposits, the quartz vein type (the Linglong type), the structural altered rock type (the Jiaojia type), and the intermediate type (the Lingshangou type), in the Zhaoping fault zone, which show clear lateral structural, alteration and mineralization zones from proximal phyllic alteration bearing pyrite, phyllic alteration, to distal siliconization and potassic feldspar alteration. From proximal to distal, the degree of crushing decrease from crush rocks to fractured rocks, and the mineralization degree decrease from disseminated and dense stockwork to sparse stockwork. There exist at least two events of mineralization in the Zhaoping fault zone, the former gold mineralization and the later silver and base metal mineralization. The gold mineralization event contains four stages, and the silver and base metal mineralization contains three stages. The sources of ore materials were discussed base on the trace elements analysis. The resources potential of the Zhaoping fault belt was estimated. Based on multi-geology information integration, six exploration models were built in the Zhaoping fault zone. They are gold ore deposit (bodies) integrated forecasting model, gold ore deposit (bodies) location prediction integrated model, geological-geophysical exploration model for Jiaojia type gold deposits, geological-geochemical exploration model for Jiaojia type gold deposits, geological-geophysical exploration model for Linglong type gold deposits, geological-geochemical exploration model for Linglong type gold deposits, deep ore bodies location prediction model. Based on these models, gold prediction was made, and 11 prospecting area were delineated. Satisfactory exploration results were achieved by engineering validation according to the prediction.更多还原