含金流体层次性循环系统探讨—以吉林和山东地区金矿为例

根据成矿流体组成和形成条件，提出含金流体层次性循环系统，并划分三个亚类；地幔富Ｃ－Ｈ－Ｏ流体循环系统；中－下部地壳富硅流体循环系统；浅－表部地壳富硫流体循环系统。板块构造作用使富硅流体与地幔和浅－表部地壳流体得以沟通，流体循环系统规模变大。该系统强调金质来源不具有岩石专属性，而是多层次流体循环的结果，这将为金矿化富集机制和建模增补新的内容。

A Preliminary Study on Au bearing Fluid Circulation in Different Lithospheric Levels

A circulatory system of Au bearing fluid in different lithospheric levels is proposed according to the metallogenic fluid components and formation condition. The system is divided into three hypo types of circulatory systems, which include C H O rich fluid circulatory system in the mantle, Si rich fluid circulatory system in the middle below earth crust and Si rich fluid circulatory system in the shallow surface earth crust. When Si rich fluid is mixed up with the mantle fluid and the shallow supercrust fluid through the plate tectonic process, the system gets larger. Metallogenic elements and the useful elements extracted from country rocks are distinctly increased in quantity, providing a lot of materials for formation of large and super large sized gold deposits. The circulatory system indicates that sources of Au are not of special rocks whereas those are as a result of fluid circulation, extraction and concentration in different lithospheric levels, which shall bring new content for gold deposit model.