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胶西北新东庄金矿床蚀变岩岩石地球化学特征与成矿作用

  • 作者:
  • 宋志勇|向胤合|刘占坤|杨斌|周鑫|邹艳红
  • 作者单位:
  • 招远市新东庄金矿有限公司|湖南五维地质科技有限公司|中南大学有色金属成矿预测与地质环境监测教育部重点实验室&中南大学地球科学与信息物理学院|中南大学有色金属成矿预测与地质环境监测教育部重点实验室&中南大学地球科学与信息物理学院|中南大学有色金属成矿预测与地质环境监测教育部重点实验室&中南大学地球科学与信息物理学院|中南大学有色金属成矿预测与地质环境监测教育部重点实验室&中南大学地球科学与信息物理学院
  • 基金项目:

  • 国家自然科学基金项目(42372346,41872249)
  • 详细信息:

  • 作者简介:
  • 宋志勇(1982—),男,工程师,从事矿山地质及采矿工作;E-mail:songzhiyong462@163.com
  • 通讯作者:
  • 向胤合(1991—),男,工程师,硕士,研究方向为矿产地质勘查;E-mail:429428197@qq.com
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Lithogeochemistry of altered rocks and mineralization in Xindongzhuang Gold Deposit,northwest Jiaodong peninsula

  • English Author:
  • Zhaoyuan Xindongzhuang Gold Mine Co.,Ltd.|Hunan 5D Geophyson Co.,Ltd.|Geosciences and Info-physics & Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring,Central South University&School of Geosciences and Info-Physics,Central South University|Geosciences and Info-physics & Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring,Central South University&School of Geosciences and Info-Physics,Central South University|Geosciences and Info-physics & Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring,Central South University&School of Geosciences and Info-Physics,Central South University|Geosciences and Info-physics & Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitoring,Central South University&School of Geosciences and Info-Physics,Central South University
  • Unit:
  • 摘要
  • 在线预览
  • 参考文献

摘要:

新东庄金矿床位于招平断裂中段,矿体主要沿中生代玲珑型花岗岩与胶东群变质岩接触带展布。黄铁绢英岩是主要矿化岩石,矿体下盘玲珑型花岗岩主要发育红化蚀变,上盘胶东群变质岩发育青磐岩化蚀变。主量元素分析结果显示,红化花岗岩、黄铁绢英岩、绢英岩中K2O、SiO2、SO3含量及LOI较原岩玲珑型花岗岩普遍增加,为带入成分,且在黄铁绢英岩、绢英岩等与矿化密切相关的岩石中增幅更大。在微量元素中,Rb、U在红化花岗岩和黄铁绢英岩、绢英岩中普遍带入。新东庄金矿床的金成矿与氧逸度、酸碱性条件的变化密切相关,金富集主要发生在还原性和偏酸性条件。

关键词:

岩石地球化学;蚀变岩;成矿作用;新东庄金矿床;招平断裂;玲珑型花岗岩

Abstract:

Xindongzhuang Gold Deposit is located in the middle section of the Zhaoping fault zone,and its ore bodies are mainly distributed along the contact zone between the Mesozoic Linglong granite and Archean Jiaodong Group metamorphic rocks.Beresite is the main mineralized rock.The Linglong granite at the footwall of ore bodies is mainly characterized by red alteration,while the metamorphic rocks in the Jiaodong Group at the hanging wall are marked by propylitization.The main elements analysis reveals the increased contents of K2O,SiO2,SO3,and LOI,which are carried components,in the granite with red alteration,beresite,and sericitolite relative to Linglong granite,in particular for the beresite,and sericitolite that are closely related to mineralization.Among microelements,Rb and U are also commonly carried in the granite with red alteration,beresite,and sericitolite.Gold mineralization at Xindongzhuang Gold Deposit is closely related to changes in oxygen fugacity and acid and alkali conditions,and the enrichment of gold mainly occurs under reductive and slightly acidic conditions.

Keywords:

lithogeochemistry;altered rocks;mineralization;Xindongzhuang Gold Deposit;Zhaoping fault;Linglong granite