王承洋,张紫薇,黄静宜,刘锦荣,孙珍军,刘存辉,张榕.内蒙古双尖子山矿区早三叠世蚀变斑岩的物质迁移特征研究[J].矿产勘查,2023,14(4):553-562 |
内蒙古双尖子山矿区早三叠世蚀变斑岩的物质迁移特征研究 |
Elements mobilization of the Early Triassic altered porphyry in the Shuangjianzishan deposit in Inner Mongolia, China |
投稿时间:2022-11-05 修订日期:2022-11-24 |
DOI:10.20008/j.kckc.202304003 |
中文关键词: 双尖子山矿床 蚀变斑岩 标准化Isocon图解法 物质迁移 成矿流体性质 |
英文关键词: Shuangjianzishan deposit altered porphyry standardized Isocon method migration of elements characteristics of ore-forming fluids |
基金项目:本文受防灾科技学院大学生创新创业训练计划项目(202111775001)、防灾科技学院中央高校基本科研业务费专题项目(ZY20215134)和国家自然科学基金青年科学基金项目(42002093)联合资助。 |
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中文摘要: |
双尖子山银多金属矿床是中国近年来在大兴安岭南段新发现的一个超大型矿床。为了研究该矿床在热液蚀变过程中的物质活化与迁移规律,本文对矿区内早三叠世蚀变斑岩进行全岩主微量元素分析与基于标准化Isocon图解法的物质迁移特征计算。结果表明,双尖子山矿区早三叠世蚀变岩样品中SiO2、K2O、Al2O3、MnO2等组分数据位于Isocon线的上方,表明在热液蚀变过程中Si、K、Al、Mn等造岩元素被带入至岩体,同时Cu、Zn等成矿元素,Li、K、Rb等碱金属元素,以及In、Cd等分散元素也都表现出带入的特征。稀土元素总体表现为带出的特征,重稀土元素的迁移量大于轻稀土元素。热液蚀变过程中的元素迁移特征表明,双尖子山矿区的成矿热液富含成矿金属元素,并且具有碱性、富硅的特征。本文研究的主要结论对于理解矿床的形成过程,以及确定成矿流体的性质有一定的借鉴意义。 |
英文摘要: |
The Shuangjianzishan is a super-large silver polymetallic deposit discovered in the southern Great Xing'an Range in recent years. To identify the element activation and migration characteristics of the Early Triassic near-ore porphyry during hydrothermal alteration, major and trace elements analysis of whole rocks was conducted in this study, and element migration was calculated based on the Standardized Isocon method. The results show that data of SiO2, K2O, Al2O3, MnO2 are located above the Isocon line, indicating that Si, K, Al, Mn and other rock-forming elements moved in during hydrothermal alteration. Ore-fomring elements (Cu and Zn), alkali metal elements (Li, K, Rb), dispersed elements (In, Nb and Cd) also show characteristics of moving in. While most of the trace elements (Ni, Sr, Y, Sc, Mo, Be, Cs, Co) and the rare earth elements show characteristics of moving out, and the migration degrees of the heavy rare earth elements is greater than that of light rare earth elements. The element migration characteristics in the hydrothermal alteration process indicate that the ore-forming fluids are alkaline and silica-rich, and contain a large amount of ore-forming elements. The main conclusions obtained in this paper can help to get a better understanding of the formation process of deposit and the nature of ore-forming fluids.. |
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