REE Geochemical Characteristics and Geological Significance of Dongjianian Silver Deposit, Henan Province

被引：0
|
作者：
Bai D. [1 ]
Zong R. [1 ]
Zhang K. [1 ]
Dong X. [1 ]
Yang R. [1 ]
机构：
[1] No.2 Institute of Geological and Mineral Resources Survey of Henan, Zhengzhou
来源：
Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society | 2021年 / 39卷 / 05期
关键词：
Dongjianian; Geochemical characteristics; Geological significance; Henan Province; Rare earth elements;
D O I：
10.11785/S1000-4343.20210515
中图分类号：
学科分类号：
摘要：
In order to study the REE composition characteristics and geological significance of Dongjianian silver deposit, the rare earth elements of magmatic rocks, strata, tectonic breccia, altered rocks and silver ore were analyzed by ICP-MS. From sedimentary rock series→gneiss→tectonicbreccia→Xiaohegranite→silverore→altered granitic cataclasticrock→diorite and diabase, the ΣREE increases gradually, which indicates that the ore-forming hydrothermal solution has leached and reformed the magmatic rock mass and stratum. The Y/Ho ratios of all kinds of rocks and ores are close to that of chondrite, and they are nearly horizontally distributed on the La/Ho-Y/Ho diagram, indicating that they have homology and certain genetic connection. The REE of silver ores can be divided into two groups: one group shows positive Eu anomaly and negative Ce anomaly, which reflects the REE characteristics of the original ore-forming hydrothermal fluid, indicating that the ore-forming fluid has the characteristics of relatively high temperature and relative reduction, and seawater may participates in the mineralization process, the other group shows both negative Eu and Ce anomaly, reflecting the superimposition and transformation of magmatic hydrothermal solution. Comprehensive analysis shows that Dongjianian silver deposit belongs to medium high temperature fracture filling type deposit. © 2021, Editorial Office of Journal of the Chinese Society of Rare Earths. All right reserved.
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页码：816 / 826
页数：10
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