摘要
本文对东海沉积物稀土和某些微量元素的地球化学特征进行了系统的讨论,研究结果表明,东海陆架区沉积物的稀土和微量元素含量随样品的粒度由粗到细呈规律性变化。唯冲绳海槽区沉积物的稀土元素含量例外,具体表现为海槽西坡到东坡,随沉积物粒度由粗→细→粗,稀土元素含量因受沉积物矿物成分控制而逐渐降低。东海沉积物的稀土元素分布模式类似页岩,表明其物质来源主体仍是陆源的。
The geochemical characteristics of rare-earth and trace elements in the East China Sea sediments are systematically discussed on the basis of previous studies. It is shown that the contents of rare-earth and trace elements in the East China Sea sediments vary regularly with the grain size of sediments, with the exception of the Okinawa Trough sediments. The REE contents of the Okinawa Trough sediments tend to decrease progressively with changing grain size from coarse to fine and then from fine to coarse as well as from western slope to eastern slope. This is because the REE contents are controlled by the mineral composition of the sediments. The fact that the chondrite-normalized REE distribution patterns are similar to those of shales suggests that the material sources of the East China Sea sediments be basically terrigenous.
出处
《地球化学》
CAS
CSCD
北大核心
1991年第1期40-46,共7页
Geochimica
