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深海沉积物中的稀土资源是一种新发现的、潜在的海底稀土资源.对太平洋中部重力活塞取样获得的90个深海粘土样品的矿物组分、常量和稀土化学分析结果进行了系统分析,并与中北太平洋以及西北太平洋南鸟岛附近海域深海沉积物稀土元素地球化学特征进行了对比.研究结果表明:太平洋中部深海粘土以富含沸石、富P及富REY为特征,其碎屑矿物中含有较多的鱼牙骨,其P2O5与CaO之间、P2O5、CaO与∑REY之间呈良好的正相关关系;其稀土分布模式表现为明显的Ce负异常、一定程度的重稀土元素富集和Y正异常.太平洋中部深海粘土REY富集的主要原因是深海粘土中含有过量的磷酸盐组分,推测过量的磷酸盐组分是由于深海粘土中鱼牙骨碎屑的加入引起的.在北太平洋海域,未受到热液活动影响的条件下,富REY的深海沉积物的稀土元素富集机制具有统一性和普遍性,可以归纳为深海沉积物中高REY磷酸盐的混入作用.
The rare earth resources in deep-sea sediments are a newly discovered and potential submarine rare earth resource.The mineral components, constants and rare earth chemical analysis results of 90 deep-sea clay samples obtained from gravity piston sampling in the central Pacific Ocean were systematically analyzed and analyzed. The results show that the deep-sea clays in the central Pacific Ocean are characterized by the enrichment of zeolite, enrichment of P, and REY-rich REEs in the detrital minerals of the middle Pacific Ocean and the waters around the South Island of the Northwest Pacific Ocean There was a significant positive correlation between P2O5, CaO and ΣREY between the P2O5 and CaO, and the rare earth distribution pattern showed obvious negative Ce anomaly, and a certain degree of heavy rare earth element enrichment And Y. The main reason for REY enrichment in deep-sea clays in the central Pacific Ocean is the excess phosphate component in deep-sea clays, presumably due to the addition of fish bone detritus in deep-sea clays. The REE enrichment mechanism of REE-rich deep-sea sediments is uniform and universal under the conditions of the North Pacific Ocean without being affected by hydrothermal activities. Deep-sea sediments REY mixed effects of high phosphate.