东太平洋CC区板块构造和多金属结核资源效应探讨
A approach on the effect of manganese nodule resources associated with plate tectonics in the eastern part of the Pacific
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摘要: 利用东太平洋CC区多波束海底地形测量、结核覆盖率深拖系统探测、结核丰度地质采样和地球物理地震勘探资料,运用板块构造和沉积动力学理论,并与丰度趋势面和神经网络分析结果对比,对东太平洋CC区构造与多金属结核资源效应关系进行了探讨,并认为:(1)富集在研究区约200亿t结核的最主要控制因素是东太平洋海隆、莱恩山脉、克拉里昂-克利伯顿大断裂(Clarion-Clipperton Fracture Zone),东、西、南、北的四个构造单元为结核大量富集起到了框架性的关键作用;(2)本区经历了和遵循着海底扩张的基本过程,这个过程对结核物质来源、成矿作用、结核分布有重大影响,结核丰度、覆盖率与地形变化非常一致,重大相变距离为10～15km,基底自形成以来一直影响着地表结核;(3)地球深部地质作用过程对结核成矿作用也有一定影响,影响因素可能涉及基底岩浆房及其大小等.Abstract: In the western part of the Clarion-Clipperton Fracture Zone in the Pacific, a series of geological and geophysical work has been carried out in the past years.The photograph of the deep-tow television camera has finished and the coverage of the manganese nodules is estimated.The nodule s abundance is obtained by means of the traditional geological sampling.The detailed Seabeam investigation and the seismic reflection are also measured.According to these important data and adopting the principle of the plate tectonics and the sedimentary dynamics, the effect of manganese nodule resources associated with the tectonics has been approached and the significant phenomena have been revealed.(1) The East Pacific Rise, the Clarion transform fault and the Clipperton transform fault, Line Mountains act as the key that has riched about amount of 200×108t manganese nodule resources.(2) The sea floor of the research area has undergone in the process of the spreading based on the high resolution bathymetric data, the process is very important to the nodule distribution and its miner alization, as well as the material source of forming the nodule.(3) The variations of abundance and coverage of the nodules are coincided with the feature of the sea bottom.The change distance of the pronounced phase is about 15 km.Since the base has formed, it has affected manganese nodules.(4) The geological processes in the earth such as the activities of the magma chamber should be factor that has been controlling the for mation and the growth of the manganese nodules in the area.
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Key words:
- the Pacific /
- manganese nodule /
- plate tectonics /
- resource effect
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