Quick Search:       Advanced Search
姜赟赟,来雅文,段太成,石厚礼.长白山地区火山岩中稀土元素特征及赋存状态初探[J].岩矿测试,2013,32(5):825-831
View Full Text   查看/发表评论   EndNote   BibTeX   下载PDF阅读器
Characteristics of Rare Earth Elements in Volcanic Rocks from Changbai Mountain
投稿时间:2013-03-10  修订日期:2013-06-21
DOI:
Key words: Changbai Mountain volcanic rocks  trachybasalt  trachyte  rare earth elements  existing phases
作者单位E-mail
姜赟赟 吉林大学地球探测科学与技术学院, 吉林 长春 130026
中国科学院长春应用化学研究所, 国家电化学和光谱研究分析中心, 吉林 长春 130022 
 
来雅文 吉林大学地球探测科学与技术学院, 吉林 长春 130026  
段太成 中国科学院长春应用化学研究所, 国家电化学和光谱研究分析中心, 吉林 长春 130022 tcduan@ciac.jl.cn 
石厚礼 吉林大学地球探测科学与技术学院, 吉林 长春 130026  
摘要点击次数: 4681
全文下载次数: 9439
Abstract:
      Changbai Mountain is located in the circum-pacific Cenozoic volcanic region, where basalt is widely distributed over nearly 20000 km2, and in which, high contents of rare earth elements (REEs) have been reported. As it is known, the value for utilization of such REE resources depends not only on their contents but also on their existing characteristics, however, no related reports have been made in this respect about the REEs in the Changbai Mountain area so far. In this work, using Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES) and Inductively Coupled Plasma-Mass Spectrometry (ICP-MS), the main component elements and rare earth elements in the volcanic rocks from Changbai Mountain were both accurately determined, the results revealing that the composition of the rocks is similar to lithofacies of basalt and trachyte, and the amount of the REEs was as high as 211-893 μg/g, with REEs enrichment being more easily found in the latter. Furthermore, negative europium anomalies (δEu) of 0.06-0.69 were observed, and the ratios of light rare earth elements and heavy rare earth elements (∑LREEs/∑HREEs) had a range of 3.80-5.61, which meant that the LREEs were prone to be more enriched. Finally, a grade extraction procedure was carried out to study the REEs existing phases, the results show that the REEs mainly exist as phosphate phase (52.9%-88.5%), carbonate phase (14.6%-43.8%) and oxides (6.04%-18.4%), while those of silicate phase and ion adsorption phase were the least. The grade extraction procedure was proven to be accurate, with recovery yields of 91.1%-108%, providing a feasible strategy for similar analytical purposes.