丁家山古楼山金矿床成矿流体储运规律

Storage and Moving of Ore-forming Fluid of Dingjiashan-Gulushan Gold Deposit

丁家山古楼山金矿区含金矿源层为上泥盆统南羊山组和下石炭统袁家沟组。组成含金矿源层岩石为高频互层的细碎屑岩碳酸盐岩,其中细砂岩、粉砂岩、碳酸盐岩含成矿流体物性较好,页岩、板岩含成矿流体物性较差。在成矿过程中,构造变形与成矿流体的形成、运移及储集密切相关。其规律为:原生构造导致成矿流体的初次聚集;第一期构造变形导致成矿流体的聚集;第二期构造变形导致成矿流体运移及金矿床形成,该期变形是金的主要成矿期;第三期构造变形使成矿流体进一步聚集和金矿体的富集;第四期构造变形是石英方解石脉的形成时期。

The upper Devonian Nanyangshan Formation and lower Carboniferous Yuanjiagou Formation layers are the source rocks of the Jinlongshan-Qiuling gold mine. The source rocks are frequent interbedding of fine-grained clastic rocks and carbonate rocks. Fine-grained sandstones, siltstones and carbonate rocks are better than shales and slates in the sense of physical nature for ore-forming fluid. In the metallogenic course, fracturing deformations closely correspond to the formation, storage and moving of the ore-forming fluid. The process is： ①primary structures result in the first collection of the ore-forming fluid; ② the first fracturing deformation results in the collection of the ore-forming fluid; ③ the second fracturing deformation results in the moving and gold deposition of the ore-forming fluid; ④ the third fracturing deformation results in the further collection of the ore-forming fluid and the enrichment of the gold deposits; ⑤ the fourth fracturing deformation corresponds to the quartz-calciate vein.