河东金矿床位于望儿山断裂中段.河东金矿床岩石化学分析显示,郭家岭型花岗闪长岩和玲珑型花岗岩在钾化蚀变过程中均有K、Na、C等元素的显著带入及Fe、Ca、Mg等元素的显著带出;黄铁绢英岩化蚀变过程中有K、Fe、Mg等元素的明显带入和Na、Ca等元素的显著带出;黏土化蚀变过程有Si、Na等元素的显著带出和Mg、Al等元素的带入;钾化花岗闪长岩和花岗岩中ΣREE和LREE/HREE比值均显著降低.钾化带、黄铁绢英岩化带及黏土化带之间有明显的物质交换.河东金矿床成矿作用和水岩反应可以概括为动态成矿与相应的水岩反应机制,热液对流过程中物理化学条件的动态变化是制约水岩反应和成矿物质活化—迁移—聚集的关键,水的电离反应是蚀变矿化过程的重要环节之一.
Hedong Gold Deposit was located in the middle part of Wang'ershan fault zone.According to the litho-chemistry testing,K,Na and C were carried in significantly and Fe,Ca and Mg were brought out obviously during pot-ash feldspathization of Guojialing granodiorite and Linglong granite; K, Fe, Mg were carried in and Na, Ca were brought out during beresitization;Si,Na were brought out and Mg,Al were carried in during clayization.ΣREE and LREE/HREE ratio decreased in potash feldspathization of granodiorite and granite.Matter exchange was obvious with-in potash feldspathization zone,beresitization zone and clayization zone.The mineralization and water-rock interaction in Hedong Gold Deposit were generalized as dynamic mineralization and correlative water-rock interaction mecha-nism.The dynamic change of physical and chemical conditions was the key of controlling the water-rock interactions and the activation, migration and accumulation of ore-forming materials.Ionization reaction of water was one of the most important parts in the alteration and mineralization process.
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