【作者】 顾文帅；

【导师】 张寿庭；

【作者基本信息】 中国地质大学(北京) ， 矿产普查与勘探， 2012， 硕士

【摘要】 栾川矿集区位于华北板块和扬子板块的拼合部位，是东秦岭钼成矿带的重要组成部分。矿集区内产出有三个特大型、一个大型钼矿床，均为斑岩-矽卡岩型矿床。该区钼钨资源量巨大，为我国最重要的钼矿产地之一，因此对该区的研究具有十分重要的科研价值和社会经济意义。栾川矿集区基础地质和矿床地质研究程度较高，多年来众多专家学者通过各种地质理论和技术方法的运用，建立了统一的地层和构造格架，为正确认识成矿地质条件提供了可靠的理论基础；同时对典型矿床的地质特征进行了总结，分析了该区成矿作用的时空统一性，建立了找矿标志，阐述了成矿机理，总结了成矿规律。在系统收集已有地质资料的基础上，通过室内研究和野外地质调查相结合，本文以矿集区内斑岩－矽卡岩型钼多金属矿床为研究对象，以南泥湖矿田为重点研究区域，对矿集区内钼多金属矿床共伴生元素富集特征进行系统研究。首先，从构造环境、成矿时代、含矿岩体各方面特征、成矿物理化学条件、矿化特征、围岩性质、蚀变分带等方面对典型矿床进行了对比，总结了矿集区内斑岩－矽卡岩型钼多金属矿床的含矿性差异及主要控矿因素，发现在构造环境和成矿母岩条件大致相同的情况下，围岩性质不同可造成矿床类型、成矿元素组合及矿化强度的差异；其次，通过采集典型矿床岩矿样品并进行共伴生元素测试分析，采用多种数据分析方法，总结出共伴生元素富集贫化与岩体、不同类型矿石及围岩之间的关系，发现In-Sn-TFe₂O₃的富集特征组合可作为寻找矽卡岩或矽卡岩型矿体的找矿标志；同时得出共伴生元素富集贫化与主成矿元素（Mo）矿化强度之间的关系，寻找出具有普遍指示意义的微量元素Re、Cd，同时发现Cd与Mo相关性更为显著，可作为第一指示性元素，从而建立了微量元素地球化学勘查指标，用于指导该区下一步找矿工作。更多还原

【Abstract】 Luanchuan ore concentrated district is situated in the joint of North China Plate andYangtze Plate, which is an important part of East Qinling molybdenum metallogenicbelt. There are three super large molybdenum polymetallic deposits and a largemolybdenum deposit, which all fall into porphyry-skarn deposit. Meanwhile thisdistrict is one of the most important molybdenum occurring areas in China，so studyof the district is of great scientific value and economic significance.Luanchuan ore concentrated district is on a high study level in basic geology andgeology of deposit. Many experts and scholars establish united tectonic andstratigraphic frameworks by applying various geological theories and methods, whichprovides a reliable theoretical basis for gaining a correct view of metallogenicgeological condition. They also summarize the geological features of typical deposits,analyze space-time unity of mineralization and establish ore-hunting indicators,expound metallogenic mechanisms and summarize metallogenic regularities.Under the industrious study on geological information, this paper takesporphyry-skarn molybdenum polymetallic deposits in Nannihu orefield as keyresearch subject, summarizes enrichment characteristics of paragenitic and associatedelements in them by fields investigation and indoor observation. Firstly, throughcomparisons of tectonic setting, mineralization epoch, rock mass features, mineralizedfeatures, country rock condition, alteration zoning, the author summarized ore-bearingdifferences and major ore-controlling factors of typical porphyry-skarn deposit in thisdistrict, found country rock could make differences on deposit-type, associations ofmetallogenetic elements and mineralization intensity under the similar conditions oftectonic setting and parent rock. Secondly, through trace elementary analysis of rockand ore samples collected from typical deposits, the author found enrichmentcharacteristics of In-Sn-TFe₂O₃could be taken as ore guide of prospecting skarn andskarn-type oerbody. Meanwhile the author analyzed the relation of paragenitic andassociated elements enrichment and rock mass, different ore and country rock,identified the relation between paragenitic and associated elements enrichment andmajor metallogenetic element （Mo） and got indicator elements （Re, Mo） to set indexof geochemical exploration, which would be of great help in the future oreprospecting.更多还原