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大陆架上沉积物的分布,对解释古地理、古环境来说是一种必不可少的基础资料.Emery(1968)曾认为全世界大陆架表面有(?)0%分布着与现代沉积环境全无直接关系的残存沉积物.因此在研究现代沉积物时,就要求在明确沉积盆地的形成史的同时,还要从综合的观点出发对沉积物的来源、搬运通路、沉积时代、沉积盆地中水文环境、生态环境的底质等作一定的调查研究.尤其沉积物的沉积速度是评价现代沉积物时不可缺的因素.现对喷火湾及其周围大陆架的沉积速度作下列四点研究:1.使用声波探测可以求出现代沉积物的层厚
The distribution of sediments on the continental shelf is an indispensable basic data for the interpretation of palaeogeography and paleoenvironment.Emery (1968) once considered that the surface of the continental shelf has a distribution of 0% with the absence of modern depositional environment Therefore, in the study of modern sediments, it is necessary to clarify the formation history of sedimentary basins, but also from a comprehensive point of view of the source of sediment, handling pathways, sedimentary age, hydrological sedimentary basin Environment and ecological environment, etc. In particular, the deposition rate of sediments is an indispensable factor in the evaluation of modern sediments, and the deposition rate of Spitfire Bay and the surrounding continental shelf are as follows: 1 Use sonic detection to find the layer thickness of modern sediments