海洋科学2012，Vol.36Issue(1)：81-86,6.
东太平洋海隆（EPR）130N附近含金属沉积物孔隙率研究
Study on the porosity of a metalliferous sediment core from the East Pacific Rise 13°N
摘要
Abstract
The porosity of a metalliferous sediment core E272 collected from 13°N East Pacific Rise （EPR 13°N） was studied. The porosity of this core monotonically decreases with increasing depth rangeing from 70.0%-85.2% with difference of about 14% between its top layer and its bottom and an average decreasing gradient of about -0.31%/cm. The red-brown color of the upper layers and yellow-green color of the lower layers of this core indicate early chemical diagenesis has exerted significant influence on this core. A combined analysis of reported geochemical, grain-size and chronological data of this core suggests that the porosity of this core might be controlled by steady-state-compaction process. The profile of its porosity versus depth fits well with the steady state compaction model. Exchanging mechanism of dissolved materials between bottom sea water and the sediment at the water-sediment interface is dominated by molecular diffusion, while under that interface, the mechanism controlling the transportation of dissolved materials is the directed flow of the interstitial water from the bottom up, and this is consistent with the profiles of labile elements versus depth of this sediment core. This study is instructive for further study on the chemical diagenesis of this sediment core.关键词
成岩作用/含金属沉积物/孔隙率/稳态压缩模型/EPR/13°NKey words
diagenesis process/metalliferous sediment/porosity/steady-state compaction model/EPR 13°N分类
海洋科学引用本文复制引用
武力,曾志刚,殷学博,王晓媛,陈帅..东太平洋海隆（EPR）130N附近含金属沉积物孔隙率研究[J].海洋科学,2012,36(1):81-86,6.基金项目
基金项目：国家自然科学基金项目 （）
山东省自然科学杰出青年基金项目 （）
中国科学院海洋地质与环境重点实验室开放基金项目 （）
