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胶东玲珑金矿床成矿地质特征及矿床成因

  • 作者:
  • 张振|于超|吴志栋|王海屹|徐增田|梁亚运
  • 作者单位:
  • 山东黄金矿业(玲珑)有限公司|山东黄金矿业(玲珑)有限公司|山东黄金矿业(玲珑)有限公司|北京科技大学土木与资源工程学院|山东黄金矿业(玲珑)有限公司|北京科技大学土木与资源工程学院
  • 基金项目:

  • 第八届中国科协青年人才托举工程项目(YESS20220661);国家自然科学基金面上项目(42273063)
  • 详细信息:

  • 作者简介:
  • 张振(1989—),男,工程师,从事矿山地质工作;E-mail:414235189@qq.com
  • 通讯作者:
  • 王海屹(2000—),男,硕士研究生,研究方向为岩石学与矿床学;E-mail:1434383299@qq.com
  • PDF下载

Geological characteristics and genesis of Linglong Gold Deposit in Jiaodong

  • English Author:
  • Shandong Gold Mining (Linglong) Co.,Ltd.|Shandong Gold Mining (Linglong) Co.,Ltd.|Shandong Gold Mining (Linglong) Co.,Ltd.|School of Civil and Resource Engineering,University of Science and Technology Beijing|Shandong Gold Mining (Linglong) Co.,Ltd.|School of Civil and Resource Engineering,University of Science and Technology Beijing
  • Unit:
  • 摘要
  • 在线预览
  • 参考文献

摘要:

玲珑金矿床位于华北克拉通东部胶东大型金矿集区西北部,是全球典型石英脉型金矿床之一,金资源总量超过1 000 t,但对于其矿床成因一直存在争议。通过系统总结玲珑金矿床地质特征、地质年代学、成矿流体特征及同位素数据,详细探讨了成矿地质特征和矿床成因。玲珑金矿床形成年龄集中在120~125 Ma,成矿流体整体属于中低温、低盐度、低密度热液流体,主要源自岩浆流体,并混有少量大气降水。C-H-O-S-Pb同位素指示,玲珑金矿床成矿流体主要来自地幔来源岩浆流体,并伴有壳源流体加入。早白垩世,华北克拉通东部岩石圈拆沉减薄引发软流圈上涌,进而不断底侵岩石圈地幔,发生部分熔融形成基性岩脉岩浆。基性岩脉岩浆上涌至地壳浅部时,温度、压力急速下降,脱气形成流体,沿着次级断裂沉淀形成金矿床,具有典型胶东型金矿床特征。

关键词:

胶东型;玲珑金矿床;石英脉型金矿床;成矿流体;矿床成因;成矿年龄

Abstract:

Linglong Gold Deposit,located in the northwestern part of the Jiaodong large-scale gold province in the eastern North China Craton,is one of the worlds typical quartz vein-type gold deposits,with total gold resources exceeding 1 000 t.However,there has been ongoing debate regarding its genesis.By systematically summarizing the geological characteristics,geochronology,characteristics of ore-forming fluids,and isotope data of Linglong Gold Deposit,this study thoroughly discusses its geological characteristics and genesis.The formation age of Linglong Gold Deposit is concentrated 120-125 Ma.The ore-forming fluids are generally medium-to-low-temperature,low-salinity,and low-density hydrothermal fluids,primarily derived from magmatic fluids with a minor contribution from meteoric water.C-H-O-S-Pb isotopes indicate that the ore-forming fluids of Linglong Gold Deposit mainly originated from mantle-derived magmatic fluids,with some contribution from crustal fluids.During the Early Cretaceous,lithospheric delamination and thinning in the eastern North China Craton triggered asthenospheric upwelling,leading to continuous underplating of the lithospheric mantle,which partially melted to form mafic dyke magma.As the mafic dyke magma ascended to the shallow crust,rapid decreases in temperature and pressure caused degassing and fluid formation,which precipitated along secondary faults to form the gold deposit,exhibiting the typical characteristics of Jiaodong-type gold deposits.

Keywords:

Jiaodong-type;Linglong Gold Deposit;quartz vein-type gold deposit;ore-forming fluids;deposit genesis;mineralization age