首页|期刊导航|中国地球化学学报(英文版)|Characteristics of rare-earth elements (REE), strontium and neodymium isotopes in hydrothermal fluorites from the Bailashui tin deposit in the Furong ore field, southern Hunan Province, China
Characteristics of rare-earth elements (REE), strontium and neodymium isotopes in hydrothermal fluorites from the Bailashui tin deposit in the Furong ore field, southern Hunan Province, China
YUAN Shunda PENG Jiantang HU Ruizhong BI Xianwu QI Liang LI Zhaoli LI Xiaomin SHUANG Yan
中国地球化学学报(英文版)2008，Vol.27Issue(4)：342-350,9.
中国地球化学学报(英文版)2008，Vol.27Issue(4)：342-350,9.DOI:10.1007/s11631-008-0342-5
Characteristics of rare-earth elements (REE), strontium and neodymium isotopes in hydrothermal fluorites from the Bailashui tin deposit in the Furong ore field, southern Hunan Province, China
Characteristics of rare-earth elements (REE), strontium and neodymium isotopes in hydrothermal fluorites from the Bailashui tin deposit in the Furong ore field, southern Hunan Province, China
摘要
Abstract
In this paper the authors present the REE concentrations and Sr and Nd isotopic compositions of fluorites from the Bailashui tin deposit of the Furong ore field, southern Hunan Province. The results showed that the total amount of REE in fluorites is usually low, ranging from 0.705 to 8.785 μg/g with the chondrite-normalized REE distribution patterns similar to those of the Qitianling granites in the study area, characterized by LREE-enrichment patterns with pronounced negative Eu anomalies. The fluorites vary in Sr isotopic composition within the range of 0.7083-0.7091, the values are lower than those of the granites and higher than those of the host carbonate rocks in this area. The εNd(t) values of fluorites vary between -9.4 and +10.3, revealing that both the crust- and mantle-source materials were involved in the ore-forming hydrothermal fluids. Combined with previous studies on this ore deposit, the Bailashui tin deposit is temporally and spatially closely related with granitic magmatism in this area. The hydrothermal fluorites are the product of fluid/rock interactions between granitic magmatic hydrothermal fluid and marine carbonate rocks. The REE and F in the ore-forming fluid were derived from the granites, whereas Sr in the ore-forming fluid came mainly from the granitic magmatic hydrothermal fluid and marine carbonate rocks, although variations in Sr isotopic composition cannot be explained by a simple mixture of these two end-members. Evidence demonstrated that the ore-forming fluids are of crustal-mantle mixing origin, but that the fluids were probably incompletely homogenized and this may be caused by inhomogeneous mixing of the fluids of different sources.关键词
Bailashui tin deposit/fluorite/REE/Sr and Nd isotopesKey words
Bailashui tin deposit/fluorite/REE/Sr and Nd isotopes分类
天文与地球科学引用本文复制引用
YUAN Shunda,PENG Jiantang,HU Ruizhong,BI Xianwu,QI Liang,LI Zhaoli,LI Xiaomin,SHUANG Yan..Characteristics of rare-earth elements (REE), strontium and neodymium isotopes in hydrothermal fluorites from the Bailashui tin deposit in the Furong ore field, southern Hunan Province, China[J].中国地球化学学报(英文版),2008,27(4):342-350,9.基金项目
This research project was financially supported jointly by the Key Program of Knowledge Innovation from the Chinese Academy of Sciences (Grant KZCX-3-SW-125), the National Natural Science Foundation of China (Grant Nos. 40472053 and 40673021) and Special Foundation on Fundamental Scientific Research as Operating Expenses among Commonweal Scientific Research Institutes at National Level (Grant K2007-1-12). （Grant KZCX-3-SW-125）
