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.
唯沖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。