广西大厂锌铜矿方解石稀土元素地球化学特征
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广西大学资源环境与材料学院

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P618.7

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国家自然科学基金项目(面上项目,重点项目,重大项目)


REE Geochemical Characteristics of Calcite in Dachang, Guangxi
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College of resources, environment and materials, guangxi university

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The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    方解石是大厂矿区常见的脉石矿物。前人对区内上部锡多金属矿的方解石研究已较为详细,但是对下部锌铜矿并未开展研究;本次研究补充测试了拉么矽卡岩型锌铜矿和铜坑矿床深部矽卡岩型锌铜矿方解石稀土含量,锌铜矿的稀土元素总含量普遍较低,ΣREE=11.15×10-6~16.17×10-6,都具有明显的有铕正异常,δEu=1.46~2.80,且轻重稀土分馏明显,LREE/HREE=2.63~6.84,配分模式为具有铕正异常的轻稀土富集右倾型模式,这样的配分模式与锡多金属矿方解石稀土元素配分模式相似,暗示两者之间可能为同源不同阶段产物;且研究表明成矿流体来源为龙箱盖岩体岩浆结晶期后分异出的岩浆热液,成矿环境为还原环境过渡向氧化环境。

    Abstract:

    Calcite is a common gangue mineral in dachang mining area. Previous studies on calcite of tin polymetallic ore in the upper part of the region are detailed, but the research on zinc copper ore in the lower part has not been carried out. This study added test the pull yao skarn type zinc copper and copper pit deep zinc skarn type copper deposit calcite content of rare earth, total content of the rare-earth element in zinc copper mine are generally lower, ΣREE = 11.15 x 10-6-16.17 x 10-6, europium has positive anomaly, the delta Eu = 1.46 ~ 2.80, and light and heavy rare earth obvious fractionation, LREE/HREE = 2.63 ~ 6.84, distribution patterns with europium is abnormal enrichment of light rare earth right model, the distribution patterns and tin polymetallic calcite distribution patterns of rare earth elements are similar, which implies that they may be products of different stages of the same origin. The results show that the mineralization fluid is derived from magmatic hydrothermal fluid of longbulid magmatic crystallization period, and the mineralization environment is the transition from reduction environment to oxidation environment.

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刘嘉兴,蔡明海. 广西大厂锌铜矿方解石稀土元素地球化学特征[J]. 科学技术与工程, 2019, 19(14): 57-67.
刘嘉兴 and. REE Geochemical Characteristics of Calcite in Dachang, Guangxi[J]. Science Technology and Engineering,2019,19(14):57-67.

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  • 收稿日期:2018-11-08
  • 最后修改日期:2019-03-22
  • 录用日期:2019-03-13
  • 在线发布日期: 2019-06-10
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