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现代地质 ›› 2011, Vol. 25 ›› Issue (3): 545-552.

• 岩石.矿物.矿床 • 上一篇    下一篇

河北省沙河市白涧铁矿床稀土元素地球化学特征

 郝俊杰, 莘建宏, 赵新卫, 冯东东   

  1. 河北省地质矿产勘查开发局 第十一地质大队,河北 邢台054000
  • 出版日期:2011-06-22 发布日期:2011-06-23
  • 作者简介:郝俊杰,男,高级工程师,1967年出生,地质学专业,主要从事邯邢式铁矿地质勘查与科研工作
  • 基金资助:

    河北省国土资源厅科学研究项目“邯邢式铁矿成矿规律与深部找矿方法研究”(2010056371)

REE Geochemistry of Baijian Iron Deposit in Shahe City, Hebei Province

   Hao-Dun-Jie, SHEN  Jian-Hong, DIAO  Xin-Wei, FENG  Dong-Dong   

  • Online:2011-06-22 Published:2011-06-23

摘要:

通过对河北省沙河市白涧铁矿床稀土元素的研究,判定矽卡岩、矿石与地层(灰岩)具有类似的稀土元素特征,矿石与岩浆岩(闪长岩)也有着密切的关系。矽卡岩、矿石的稀土元素分布模式表现出了承袭围岩的分布模式,造成这一现象的原因可能是由于含矿岩浆形成后经过了较长距离的运移,需要经过断裂等通道到达现在的沉淀位置,并与围岩发生接触交代作用,而在交代过程中,热液萃取了大量地层的成矿物质所造成。矽卡岩、矿石均呈现较强的Eu负异常和较弱的Ce异常,表明它们是由一种低温、Eu强烈富集的岩浆流体在还原环境下形成的。

关键词: 稀土元素地球化学, 邯邢式铁矿, 沙河白涧铁矿, 河北省

Abstract:

 Based on the study of REE geochemistry of Baijian iron deposit in Shahe, Hebei Province, REE in skarns, ores and strata limestone have the similar characteristics, and ores are closely related to magmatic rocks (diorites). REE pattern of ores show the same distribution pattern of limestones of wallrocks. A probable reason of the phenomenon is infered that oreforming fluids or magma experienced long distance transportation after forming, went through structures such as faults to the deposition place, and then acted metasomatism with wallrocks, and that during metasomatism, oreforming fluids extracted oreforming materials from wallrocks. The skarns and ores have similar chondritenormalized REE distribution patterns and are enriched in LREE, with an obvious Eu negative anomaly and a moderate Ce anomaly, implaing that they were formed by magmatic fluids in reductive environment characterized by low temperature and strong enrichment of Eu.

Key words: REE geochemistry, HanXing type iron deposit, Baijian iron deposit in Shahe, Hebei Province