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广东省大宝山斑岩型铜矿床勘查突破及其区域找矿意义
Received:October 20, 2019  Revised:December 16, 2019  点此下载全文
Cite This Paper:ZHAO Ruyi,WANG Denghong,WANG Yaowu,CHEN Yuchuan,LIU Wusheng,ZHANG Xiong,JIANG Jinchang,LIU Zhanqing,LI Tingjie,WANG Langen,YING Lijuan.2020.A prospecting breakthrough and progress in the Dabaoshan porphyry copper deposit in Guangdong Province[J].Acta Geologica Sinica,94(1):204-216
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Author NameAffiliationE-mail
ZHAO Ruyi 1) State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013
2) MNR Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing, 100037 
93236749@qq.com 
WANG Denghong 2) MNR Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing, 100037 wangdenghong@vip.sina.com 
WANG Yaowu 3) Guangdong Province Dabaoshan Mining Co., Ltd., Shaoguan, Guangdong, 512127  
CHEN Yuchuan 2) MNR Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing, 100037  
LIU Wusheng 3) Guangdong Province Dabaoshan Mining Co., Ltd., Shaoguan, Guangdong, 512127  
ZHANG Xiong 3) Guangdong Province Dabaoshan Mining Co., Ltd., Shaoguan, Guangdong, 512127  
JIANG Jinchang 3) Guangdong Province Dabaoshan Mining Co., Ltd., Shaoguan, Guangdong, 512127  
LIU Zhanqing 4) College of Earth Sciences, Guilin University of Technology, Guilin, Guangxi, 541004  
LI Tingjie 3) Guangdong Province Dabaoshan Mining Co., Ltd., Shaoguan, Guangdong, 512127  
WANG Langen 3) Guangdong Province Dabaoshan Mining Co., Ltd., Shaoguan, Guangdong, 512127  
YING Lijuan 2) MNR Key Laboratory of Metallogeny and Mineral Resource Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing, 100037  
基金项目:本文为中央级公益性科研院所基本科研业务费项目(编号 JYYWF20183701、JYYWF20183704),中国地质调查局中国矿产地质志项目(编号 DD20160346、DD20190379)和大宝山矿床外围(深部)找矿方向研究(HE1806、HE1909)联合资助成果。
中文摘要:接替资源勘查是广东省大宝山铜多金属矿近十五年的主题之一。本文在介绍矿床地质的基础上,回顾了大宝山英安斑岩中斑岩型铜矿的发现过程。陡倾细脉状石英硫化物是大宝山斑岩型铜矿的主要矿化形式,脉体倾向290°~310°,倾角65°~75°,脉幅主要为0. 5~10mm,脉频平均约22条/m。通过查明英安斑岩与铜多金属矿化之间的关系,将勘探线方向调整为120°,钻孔尽可能大角度穿切石英硫化物脉体,成为斑岩型铜矿勘查取得突破的关键。大宝山英安斑岩墙是早侏罗世晚期(175Ma前后)沿大宝山逆冲推覆构造侵位的浅成岩,铜硫多金属矿化与之相关。铜矿化强度与(黄铁)绢英岩化、绢云母化和绿泥石化关系十分密切,蚀变分带较为发育,是特殊类型的斑岩铜矿。铜矿化品位主要为0. 10%~0. 60%,平均品位0. 43%。250m高程以上的大宝山英安斑岩墙中,初步估算新增铜资源量可达大型规模,深部依然是其找矿主攻方向。在粤北—赣南地区,加强与英安斑岩相关的铜、铅、锌、金、银等多金属找矿勘查工作,有望在该区落实一个北东向斑岩型铜多金属成矿带。
中文关键词:大宝山矿床  逆冲推覆构造  斑岩型铜矿  突破与进展  绢英岩化  燕山期
 
A prospecting breakthrough and progress in the Dabaoshan porphyry copper deposit in Guangdong Province
Abstract:One of the major themes in the past 15 years is the succeeding resources prospecting in the Dabaoshan copper polymetallic mine in Guangdong Province. The geology, discovery, and prospecting history of the Dabaoshan porphyry copper deposits are reviewed in this paper. Steeply dipping fine veined quartz sulfide is the main ore controlling factor of Dabaoshan porphyry copper deposit. The vein body inclinations are 290°~310°, the dip angles are 65°~75°, the width of the veins is 0.5~10mm, and the average vein frequency is 22 pieces/m. A breakthrough in porphyry copper prospecting was achieved by adjusting the exploration line to 120° and drilling through the quartz sulfide vein at the greatest possible angle. The Dabaoshan dacite porphyry wall is an ultra- shallow magmatic rock which was emplaced along the Dabaoshan thrust nappe structure in the late early Jurassic (around 175 Ma). Copper mineralization intensity is closely related to beresitization of the phyllic zone, sericitization and chloritization of the porphyry copper deposit. Copper mineralization grade is 0.10%~0.60%, with an average grade of 0. 43%. The copper resource can reach a large scale deposit in the Dabaoshan dacite wall at 250m elevation. In the area fromnorth Guangdong Province tosouth Jiangxi Province a NE trending porphyry copper pollymetallic metallogenic belt related to the dacite porphyrycould beexpected where the Cu, Pb, Zn, Au, and Ag polymetallic prospecting can beundertaken.
keywords:Dabaoshan deposit  thrust nappe structure  porphyry copper deposit  breakthrough and progress  phyllic  Yanshanian
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