摘要
对黄海沉积物中B,F,Rb,Sr地球化学研究表明,B,F,Rb,Sr含量受沉积物粒度控制。B,F,Rb随沉积物粒度变小含量增高,富集于粘土矿物中;Sr则相反,富集于碳酸盐中。R型聚类分析表明,黄海沉积物元素基本可分为两大类,即与陆源碎屑有关的B,F,Rb等元素及与自生生物作用有关的Sr,Ca,Mn等元素。Q型聚类分析表明,黄海沉积物可分为三大类,一是现代细粒沉积物,二是残留粗粒沉积物,三为现代粗粒沉积物。
The abundance of the elements B, F, Rb, their distributional characteristics and the correlative relationships, and other geochemical characteristics were studied. (1) The element contents are controlled by sediment grain size. The contents of B, F, and Rb increase with the decrease in sediment grain size. On the contrary, Sr contents decrease as sediment grain size decreases. (2) B, F and Rb are mainly related to clay minerals. Contents of B and F in heavy minerals are much higher than those in light minerals. B and Rb have a close rela-tionship with Al and F with siderophile elements. Sr has a close relationship with Ca and enriches in carbonates. (3) R-Cluster analysis showed that the 19 analysed elements in the Yellow Sea sediments can basically be divided into two groups. One of them comes mainly from terrigenous materials and the other group comes mainly from aufhigenic and biogenic accumulation. (4) Q-Cluster analysis suggests that the Yellow Sea sediments can basically be divided into three types. The first one is mainly composed of fine and current sediments and enriches B, F, Rb and other philo-clay elements. This type sediments are mainly formed in a weakly hydrodynamic and reduction environment. The second type sediments basically consist of large grain sized and residual sediments. They enrich Sr and Ca and form in a strongly hydrodynamic and residual sedimentary environment. The rest are mainly composed of large grain sized and current sediments and have a characteristic of low contents of Sr, Ca, B, F, Rb and other elements. This type sediments are mainly formed in a strongly hydrodynamic and temporal sedimentary environment. The main factors controlling geochemical characteristics of the elements in the Yellow Sea sediments are elemental properties, their material sources, the sediment types and the hydrodynamic condition as well as the physicoche-mical conditions.
出处
《海洋与湖沼》
CAS
CSCD
北大核心
1989年第6期517-527,共11页
Oceanologia Et Limnologia Sinica
