粤北连平县大尖山铅锌矿区地质特征、富集规律与找矿方向
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摘要
大尖山铅锌矿位于粤北山字型前弧东翼,贵东—大东山东西向构造带东段南缘,大尖山岩体北缘,属南岭成矿带的南带。矿体顶板围岩为印支期英安斑岩,底板为早石炭世大塘阶忠信组砂、页岩。矿体呈脉状产出,严格受断裂构造控制,向南西方向侧伏规律明显,倾向延深大于走向延长。近东西向及北东东向构造是成矿最有利的导矿构造,矿床形成与燕山期花岗岩侵入作用所产生的岩浆热液有关,是成矿的有利母岩,矿床成因类型为中温热液充填破碎带型脉状铅锌矿床。初步揭示大尖山矿区铅锌矿的矿化富集规律,认为在V_1矿体的深部及F_2西延方向葫芦洞矿点及横坑矿点找矿远景较好,对下一步找矿有一定的参考意义。
Dajianshan lead-zinc mine is located in the eastern part of the e-type tectonic,southeast margin of the eastwest Guidong-Dadongshan tectonic belt,and in the northern margin of the Dajianshan rocks. It belongs to the south belt of Nanling metallogenic belt. The top and bottom rocks are the dacite-porphyry of Indosinian and the sand,shale of early Carboniferous Datang order Zhongxin Formation. The ore-body are vein,and strictly controlled by the fault structure F_2.Lateral plunging regularity is obvious,and its depth is longer than the length extension. the east-west and north-east-east tectonics are most favorable to the mineralization,the formation of the deposit is related to the magmatic hydrothermal fluid produced by the invasion of the granite in the Yanshanian period. It is the favorable parent rock of the mineralization.The genetic type of the deposit is a medium-temperature hydrothermal filling fractured pulsed lead-zinc deposit. In this paper,the authors reveal the mineralization and enrichment of lead-zinc deposit in Dajingshan mining area,and think that the prospecting direction is the deep part of V_1 ore body and F_2 west extension direction,Huludong and Hengkeng mine.It may can provide a certain reference significance for the next stage of ore prospecting.
Dajianshan lead-zinc mine is located in the eastern part of the e-type tectonic,southeast margin of the eastwest Guidong-Dadongshan tectonic belt,and in the northern margin of the Dajianshan rocks. It belongs to the south belt of Nanling metallogenic belt. The top and bottom rocks are the dacite-porphyry of Indosinian and the sand,shale of early Carboniferous Datang order Zhongxin Formation. The ore-body are vein,and strictly controlled by the fault structure F_2.Lateral plunging regularity is obvious,and its depth is longer than the length extension. the east-west and north-east-east tectonics are most favorable to the mineralization,the formation of the deposit is related to the magmatic hydrothermal fluid produced by the invasion of the granite in the Yanshanian period. It is the favorable parent rock of the mineralization.The genetic type of the deposit is a medium-temperature hydrothermal filling fractured pulsed lead-zinc deposit. In this paper,the authors reveal the mineralization and enrichment of lead-zinc deposit in Dajingshan mining area,and think that the prospecting direction is the deep part of V_1 ore body and F_2 west extension direction,Huludong and Hengkeng mine.It may can provide a certain reference significance for the next stage of ore prospecting.
引文
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[3]游宏昌,戴茂瑞,简松春,等.广东省连平县大尖山矿区(4~15线)铅锌矿详细勘探地质报告[R].惠州:广东省地质矿产局756地质大队,1985.
[4]王瑞峰,蔡会生,李观新.广东连平县大尖山铅锌矿区成矿构造初步研究[J].广东地质,2004,19(3):14-18.
[5]陈冬梅,高凤颖,黎飞.粤北大尖山铅锌矿床成因及围岩含矿性[J].广东地质,2004,19(3):1-7.
[6]易金春,童继初,孟建峰,广东省大尖山铅锌矿床地质特征及找矿前景分析[J].低碳世界,2016(26):126-128.
[7]徐接标,张术根,左亚飞,等.湘南粤北铅锌矿床闪锌矿的标型特征及指示意义[J].岩石矿物学杂志,2016,35(2):283-296.
[8]李艺,梁有彬.广东大尖山铅锌矿伴生银的赋存状态及其利用前景评价[J].广东有色金属地质,1992(1):36-41.
[9]罗福如.广东省连平大尖山铅锌矿地质特征及成因初探[J].地球,2013(8):92-93.