成矿系统中成矿流体演化与成矿- - - - 以内蒙赤峰边家三种类型多金属矿床为例

The Linxi district of Chifeng in Inner Mongolia is an important ore concentration area in southern of the Da Hinggan Mountain, existing the Huanggangliang iron-tin deposit,the Dajing copper-silver deposit and the Baiyinnuoer copper-lead-tin deposit, etc. In recent years there is a new discovery, three types of ore deposits are discovered between only 2 square kilometers at Bianjia, those are the hot liquid filling type lead-zinc deposit at the east, concealed explosive breccia type lead-zinc deposit at the central and porphyry copper tin deposit at the west. This variety of ore types coexistence, shows a different ore-forming geological activity in the different style space of of ore deposits formed, it might be a well-preserved metallogenic system. The applicant is going to research the metallogenic system focusing on the evolution of ore-forming fluid, and the ore-forming fluid migration and ore-forming process which dominated by the unified structure, magmatic rocks multiple controlling factors and the unity of a of magma-fluid-metallogenic system. The macroscopic geological observation focuses on the geological setting,include to mineralization structure to anatomy its space structure, analyzing its composition structure and time structure. The microscopic research includes fluid inclusions, S，C，H-O isotopes analysis and zinc isotope analysis, to determine the relationship between thses three types deposits. It has important theoretical significance and actual meaning in guiding the mineral exploration and development to lauch the research of metallogenic system in Chifeng of Inner Mongolia, to discuss the fine evolution process and mineralization process of ore-forming fluid and to establish its characteristic metallogenic models.

内蒙古赤峰林西地区是大兴安岭南段重要的矿集区,区内有黄岗梁铁锡矿、大井银铜矿和白音诺尔铅锌银矿等。近年在林西边家仅2平方公里范围内发现3种类型矿床，即东区的热液充填脉型铅锌矿、中区的隐爆角砾岩型铅锌矿和西区的斑岩型铜锡矿。这一多种矿床类型共存、集中出现，显示了一次地质活动在不同成矿空间中形成的不同类型矿床，可能是一个保存完好的成矿系统。申请人从成矿系统中成矿流体演化入手，研究受统一构造、岩浆岩等多重圈闭因素制约而构成的统一的岩浆-流体系统之中，成矿流体的运移与成矿。宏观上研究成矿地质背景,从矿化结构入手剖析其空间结构、成分结构和时间结构；微观上研究流体包裹体、硫、碳、氢、氧同位素分析和锌同位素分析，从而确定三种矿床的关系。综合开展内蒙赤峰边家多金属矿床的成矿系统的研究,探讨成矿流体精细演化过程及成矿过程，建立其颇具特色的成矿模式,具有重要的理论意义和指导该区矿产勘查的实际意义。

华南是世界重要的锡矿产地之一，有业界皆知的南岭成矿带，而北方一直没有大规模的可利用的锡矿发现。近年，新发现的维拉斯托、边家大院锡矿均为单矿物锡石，易于选冶，这一发现打破了“北方一直没有大规模可利用锡矿”的僵局。本研究集中在仅2平方公里范围内发现3种类型矿床的边家，该区东边部分为热液充填脉型铅锌矿、中间为隐爆角砾岩型铅锌矿和西边部分为斑岩型铜锡矿。这一多种矿床类型共存、集中出现，显示了一次地质活动在不同成矿空间中形成的不同类型矿床，可能是一个保存完好的成矿系统。本研究从成矿系统中成矿流体演化入手，研究受统一构造、岩浆岩等多重圈闭因素制约而构成的统一的岩浆-流体系统之中，成矿流体的运移与成矿。宏观上研究成矿地质背景,从矿化结构入手剖析其空间结构、成分结构和时间结构；微观上研究流体包裹体、硫、碳、氢、氧同位素分析和锌同位素分析，从而确定三种矿床的关系。综合开展内蒙赤峰边家多金属矿床的成矿系统的研究,探讨成矿流体精细演化过程及成矿过程，建立其颇具特色的成矿模式,具有重要的理论意义和指导该区矿产勘查的实际意义。