【摘要】 <正> 前言 东海大陆架是世界上最宽的大陆架之一,它以辽阔的海域、丰富的资源吸引着国内外海洋学、地质学、地球物理学等各个领域的学者,但有关东海大陆架海洋地球化学方面的论文却为数不多,特别是海底沉积物的稀土元素地球化学研究,尚未见报导。更多还原

【Abstract】 REE geochemistry has been studied with respect to sea-floor sediments in the continental shelf of East China Sea. The average content of RE2O3 is derived as 175 ppm based on 68 samples of the continental shelf sediments. The absolute concentrations of Y and La-Lu in the abovementioned sediments are shown in Table 3. The BEE distribution patterns of the sediments demonstrate a distinct depletion in Eu and a negative slope. It is considered that the fragments of Mesozoie intermediate-acid igneous rocks widely distributed in southeastern China are the main source of REE in sea-floor sediments of the continental shelf.更多还原