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中部秘鲁大陆边缘沉积物的微结构表明,在快速沉积的半深海环境中,有机物质的分解作用对岩土工程的性质有着重要的影响。在权其多孔的表层沉积物中,类似粪粒残余的颗粒外似乎裹着一层细菌“外壳”,但友受埋之后,由于日趋均一且具封闭结构的有机矿物集合体的发育,外壳逐渐消失。间隙水营养物质和固相碳、氮及磷的分布支持着这一解释,即,该发育过程与分解作用及代谢物因微生物硫酸盐的还原作用而从不稳定的有机物质中再生的过程是一致的。据认为,早期的集合体有着一种加强效应,其再结合以近表沉积的低密度,便产生了低于实验确定的固结前压力的有效盖层压力。为了验证大陆边缘环境中有机物质聚集与沉积物稳定性之间的关系,需要有关有机矿物集合体生存期,以及总体和局部的微结构对于成岩作用速率和产生物的影响等方面的更基础的知识。
The microstructure of the sediments on the margin of the central Peruvian continent indicates that the decomposition of organic matter has an important influence on the geotechnical properties in the rapidly sedimentary semi-deep sea environment. In its porous surface sediments, particles resembling fecal pellets appear to be surrounded by a bacterial “shell” outside of them, but after being buried, due to the development of increasingly homogeneous and closed-structure organic mineral assemblages, disappear. The distribution of interstitial water nutrients and solid-phase carbon, nitrogen and phosphorus support this explanation that the process of development and degradation and the regeneration of metabolites from labile organic matter by the reduction of microbial sulfate are Consistent. It is believed that the early assemblages had a reinforcing effect which, combined with the low density of near-surface deposition, resulted in effective cap pressure below the experimentally determined pre-consolidation pressure. In order to verify the relationship between organic matter accumulation and sediment stability in the marginal environment of the continent, more information on the survival of organic mineral assemblages and the overall and local microstructures impact on diagenesis rates and production know how.