空间因子分析与沉积地球化学旋回元素组合的确定

１９９５年５月，引用地矿部“七五”东北太平洋ＣＣＡ１２１柱状沉积物的８个元素地球化学分析数据，利用空间因子分析方法确定两种周期度（Ｄ１＝６５ｃｍ，Ｄ２＝１０５ｃｍ）内的沉积地球化学旋回元素组合，并据此探讨多金属结核成矿与物源环境的关系，研究表明，与小尺度周期（Ｄ１＝６５ｃｍ）对应的元素组合：Ｕｄ１（Ｍｎ，Ｃｏ，Ｃｕ，Ａｌ２Ｏ３，ＳｉＯ２和Ｕｄ２（Ｆｅ，Ｃａ，Ｃｏ，Ｃｕ）与大尺度周期对应的元素组合为

SPATIAL FACTOR ANALYSIS AND DETERMINATION OF ELEMENT ASSOCIATIONS RELATING TO SEDIMENTARY GEOCHEMISTRY CYCLES

In mp, 1995, using geochemcal data of the CCA121 sediment core collected byMGMR and the method of spectrum decomposition for multivariate time series-spactial factor analysis,element associations in association with geochedrical cycles were identified on two spatial scales (i. e.D1= 65cm, D2=105cm). The elements associations cormsponding to the smaller scale (D1=65cm)were Ud1(Mn, Co,Cu,Al2O3,SiO2) and Ud3 (Fe, Ca, Co, Cu) those corresponding to the larger scale (D2=105cm) were Ud1(Co) and Ud2(Mn,Fe, Al2O3). Periodic environmntal changes relating to thesmaller scale were occompanied by cyclic changes in terrestrial, authigenic and biogenic inputs,reducing the remobilization, migration and deposition of metallogenetic elements Mn, Co, Cu, and Fein the form of oscillation; these elements were involved in the metallogenitic process of polymetallicnodules. on the other hand, periodic enviromntal changes relating to the larges scale wereaccompanied by cyclic changes in authigenic and vocanogenic (hydrothermal) inputs, reducing theremoblization, migration and deposition of metallogenetic elements Co, Fe and Mn in the same wayduring the formation of polymetallic nodules. Such oscillatory metallogenetic processes for eash ofthe metallogenetic elements were controlled by soarce composition of sediments which variesperiodically on different scales.