摘要
用电感耦合等离子体(ICP-MS)测定了海南岛南渡江近岸河口11个站位沉积物中的稀土元素(REEs)以及U,Th,Ti,Sr,Mn等元素的含量,探讨了沉积物中REE分布模式和变化规律,推断沉积物的来源及演化过程。结果表明,研究区沉积物ΣREE平均含量为124.94 mg.kg-1,河口沉积物ΣREE含量低于滨浅海沉积物。虽然各站ΣREE含量存在较大差别,但分布模式相似,均为轻稀土富集型和Eu负异常,为陆壳型沉积。沉积物中REE与U,Th,Ti和Zr有显著的正相关性,与Sr,CaO相关性较弱,表明沉积物主要来源是花岗岩陆源物质,其次是生源碳酸盐物质。
The rare earth elements （REEs） and U, Th, Ti, Sr and Mn elements in eleven locations of sediments sampled from the coast and estuary of Nandu River in Hainan Island were measured by ICP-MS. And the distribution patterns and movement orientations of the rare earth were discussed, and the source and evolvement process was deduced. The results showed the average ∑ REE content in sediment was 124.94 mg·kg^-1 at work place, ∑ REE in estuary sediment was lower than the sediment in the coast. It was found that there was a great difference among the sediments, but their Chondrite-normalized REE distribution pattern had very similar-LREE （light rare earth element） enrichment and Eu negative abnormal, and indicating that the sediments had a similar sourcelandmass. The REE in the sediments had the highest correlation coefficient with U, Th, Ti, Zr, and had a general correlation with Sr and CaO. All the above revealed that the sediment from the coast and estuary of Nandu River in Hainan Island were mainly from landmass, especially from the granite soil, and the biosource also provide a great effect for the sediments.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2010年第1期110-114,共5页
Journal of the Chinese Society of Rare Earths
基金
中国地质调查局全国土壤现状调查及污染防治项目(GZTR20060105)资助
关键词
稀土元素
沉积环境
球粒陨石标准化配分曲线
rare earth elements（REEs）
sedimentary environment
chondrite-normalized distribution curve
