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本文介绍了采用古地磁法和放射性法分别测定的太平洋结核区的沉积速率和铁锰结核的生长速度。提出陆源搬运物、风力破坏、火山活动、海洋深度、气候、海底地貌、水力条件和生物含量是影响沉积速率的因素。这些因素决定了海底沉积物形成的区域性和局部性的分带特征。沉积速率低是结核形成的有利条件,结核的物质成分与其形成速度有关,结核“富矿”生长速度最慢则高度富集Co、Ni、Cu等元素。沉积速率和铁锰结核的生长速度的明显差别为定量评价最近0.4Ma的沉积过程和二者之间的联系提供了依据,使我们更好地了解海底不同构造位置的沉积环境和铁锰结核的成矿作用。
This paper presents the sedimentation rate and the growth rate of Fe-Mn nodules in the Pacific nodules measured by paleomagnetic method and radioactive method respectively. Proposed land-based transport, wind damage, volcanic activity, ocean depth, climate, seabed topography, hydraulic conditions and biological content are the factors that affect the deposition rate. These factors determine the regional and local zonation characteristics of seafloor sediments. The low deposition rate is favorable for the formation of tuberculosis. The composition of tuberculosis is related to its formation speed. The slowest growth rate of tuberculosis “rich ore” is highly enriched in elements such as Co, Ni and Cu. The significant difference between the sedimentation rate and the growth rate of Fe-Mn nodules provides a basis for the quantitative evaluation of the recent 0.4 Ma sedimentation process and the relationship between them, so that we can better understand the sedimentary environment of different structural positions of the seafloor and the relationship between Fe-Mn nodules Mineralization.