粤东单竹坑铅锌银矿床地质特征及成因
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摘要
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.
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.
引文
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[6] 高凤颖.广东紫金桃子窝火山岩锡矿蚀变特征及找矿方向[J].矿业快报,2007(4):79-81.
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[8] 张轩国,李明君.综合物探方法在单竹坑多金属矿区的找矿应用[J].工程地球物理学报,2018,15(1):98-103.
[9] 邱辉,李朋.广东省紫金县单竹坑铅矿普查报告[R].广东:广东省地球物理探矿大队,2016.
[10] 孙骥.冈底斯中段纳如松多铅锌矿床成因研究[D].武汉:中国地质大学(武汉),2013.
[11] 郑蕾.钦杭结合带南段澳通与佛子冲铅锌矿床地质地球化学特征对比研究[D].广州:中山大学,2014.
[12] 周永章,李兴远,郑义,等.钦杭结合带成矿地质背景及成矿规律[J].岩石学报,2017,33(3):667-681.
[13] 王登红,应立娟,唐菊兴,等.与角岩有关的矿床主要类型及其对深部找矿的意义[J].地球科学与环境学报,2011(3):221-229.
[14] 陆小平,陆孝赞,龚名文,等.广西姑婆山锡矿田矿床地质特征及矿床成因[J].华南地质与矿产,2005(2):53-60.
[15] 李金刚,陈植文,李自卫.云浮高枨银多金属矿特征及成因[J].西部探矿工程,2006(9):124-126.
[16] 路远发,马丽艳,徐坤华,等.广东苏石坑铅锌矿床地质地球化学特征与矿床成因[J].华南地质与矿产,1997(1):18-26.