粤东单竹坑铅锌银矿床地质特征及成因

Geological Characteristics and Genesis of Danzhukeng Lead-zinc-silver deposit in Eastern Guangdong Province

单竹坑铅锌银矿床位于粤东曾公嶂火山盆地外围西北,属于武夷成矿带西南段。通过对区域成矿地质背景、矿区及矿床地质特征进行分析研究,从地层、构造、岩浆岩、围岩蚀变与矿化富集规律等方面初步探讨了矿床成因。研究表明:矿体赋存于硅化角岩化碎裂岩中,受NW—NNW向断裂控制,深部存在隐伏的含矿斑岩体;单竹坑铅锌银矿床属于与岩浆作用有关的热液裂隙充填型脉状铅锌银多金属矿床。在上述分析的基础上,梳理了矿床地质、蚀变、铁帽找矿标志,供矿区后续找矿参考。

Danzhukeng lead-zinc-silver deposit is located in the northwest of the Zenggongzhang volcanic basin in the eastern part of Guangdong Province,and belongs to the southwestern segment of tWuyi metallogenic belt.Through the analysis and study of regional metallogenic geological background,mining area and deposit geological characteristics,genesis of the deposit is preliminarily discussed in terms of stratigraphy,tectonics,magmatic rocks,alteration and mineralization.The study shows that the orebodies occur in silicified and fractured rocks,controlled by NW-NNW faults,and there is concealed ore porphyry body in the deep;the deposit belongs to the hydrothermal fissure-filled vein-like Pb-Zn-Ag polymetallic deposit associated with the magmatic effect.Based on the above discussion results,the prospecting indicators of geological,alteration and iron cap are summarized,so as to provide reliable reference for the further prospecting work of the mining area.