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通过对ODP184航次 114 6站位海底岩心沉积物中稀土元素含量及其配分模式的研究 ,确立了其分配规律 ,即相对富集轻稀土 ,Eu亏损等 ,并且与东海大陆架及中国黄土的稀土分布模式相似 ,表明本区沉积物物源主要来自陆源 ,是大陆岩石分化过程的产物。对富集因子的研究也证明了沉积物主要来自陆源。δCe的弱负异常值与∑REE和δEu值一样 ,主要受陆源源区气候环境变化控制 ,而与海水关系不大。稀土元素与生物作用基本无关 ,可能主要是赋存于陆源碎屑矿物的晶格中。通过对岩心沉积物间隙水成分的研究 ,表明成岩环境主要为还原环境。6 8m(mcd)以上主要为硫酸盐的还原作用 ,6 8m以下主要为甲烷的生物生成作用
By studying the REE content and its partitioning patterns in core sediments at 1146 stations of ODP184, the distribution pattern of REE, ie relative enrichment of light rare earths, Eu depletion, etc., was established and compared with the distribution of rare earth elements in the continental shelf of the East China Sea and the Chinese loess The patterns are similar, indicating that the source of sediment in this area is mainly from terrestrial sources, which is the product of continental rock differentiation. The study of enrichment factors also proves that the sediments are mainly from terrestrial sources. The weak negative anomaly value of δCe, like ΣREE and δEu, is mainly controlled by the change of climatic environment in the terrestrial source area, but has little to do with the seawater. Rare earth elements and biological role has nothing to do, probably mainly in terrestrial detrital minerals in the lattice. By studying the pore water composition of core sediments, it shows that diagenetic environment is mainly reduced environment. 6 8m (mcd) The above is mainly the reduction of sulfate, and the main generation below 6m is the biogenesis of methane