东太平洋海盆一短柱状沉积物的分析与研究

本文利用＂海洋四号＂调查船,ＨＹ４－８７１航次在东太平洋海盆ＣＣ２９站取得的短柱状样,研究了沉积物岸性变化特征,分析讨论了元素在沉积物固液两相间的迁移变化及其影响因素．结果表明,在短暂的地史时期内,ＣＣ２９站沉积环境和物质来源都有变化．沉积物由过去的以陆源和火山源为主演变到现在的以陆源和生物源为主．沉积物物质来源的变化是引起ＣＣ２９站沉积物主要化学组分变化的重要原因;间隙水元素浓度的变化除与沉积环境有关外,还主要受沉积物早期成岩作用的影响．

The Transformation of Elements Between Solid Phase of Sediment and Interstitial Water and its Controlling Factors in Eastern Pacific Basin

Sediment and interstitial water samples were collected from CC29 station in the Eastern Pacific Basin by the R/V "Haiyang-4" during the HY4-871 cruise. The lithological characteristic of the sediment was studied. The transformation of major and minor elements between solid phase of the sediment and niterstitial water and its controlling facotrs were discussed. It was found that during a short geological period, both the sedimentary environment of CC29 and material source had chansed. The edments which were mainly material of terrigenous and volcanic origin previously changed mainly into material of terrisenous and biogenic derivation. The variation of the material source of sediments was an boportant cause for the changes in the major chemical components of the sediments of CC29 and the change in the concentrations of the major and minor elements of the interstitial water was mainly influenced by early diagenesis of sediments besides being related to sedimentary environment.