栖霞市大河崖金矿地质特征及找矿方向

Geological Characteristics and Prospecting Direction of Daheya Gold Deposit in Qixia City

摘要:

栖霞市大河崖金矿位于台前陡崖断裂南端，目前共发现3条矿体，矿体延伸较为稳定，矿体受F6，F5断裂控制。根据大河崖金矿矿床地质特征、蚀变特征、矿石结构构造等，认为其为岩浆期后中低温热液交代破碎蚀变岩型矿床。该文通过区域对比研究，结合该区地质、物化探特征、成矿特征，研究了矿床成因，总结了找矿标志。认为NW向、NE向次级断裂构造交会部位是成矿的有利部位，岩性接触带附近的黄铁绢英岩化蚀变带是找矿的直接标志，与断裂裂隙构造对应部位是快速定位矿体的有效方法。通过综合研究，预测Ⅰ号矿体深部及F5断裂带下盘部位是有利的找矿地段，为在台前陡崖断裂南端进一步找矿奠定了基础。

Abstract:

Daheya gold deposit is located in the south of TaiqianDouya fault. Now, seven ore bodies have been found. The extension is stable.Ⅰ and Ⅱore bodies are controlled by F6 and F5 faults. Based on geological characteristics, alteration characteristics and ore structures of Daheya gold deposit, it is regarded that this deposit belongs to middle and low temperature hydrothermal metasomatic altered rock deposit during late magmatism. Based on the study of geology, geophysical and geochemical, metallogenic characteristics, its origin and prospecting criteria have been studied. The intersection of NW and NE secondary faults is favorable area of mineralization. The beresitization zone of lithologic contact zone is a direct sign of prospecting. Through comprehensive study, it is predicated that Ⅰ the deep part of ore body and the footwall of F5 fault are favorable prospecting direction. It established a foundation for the next prospecting of TaiqianDouya fault.