摘要
台湾浅滩位于台湾海峡之南端,地跨东海与南海之间。由于渔场的调查,曾系统地进行了海底沉积物的采样。为了查明现代海洋大陆架沉积物中铁、锰、钛和磷等元素的若干地球化学问题,我们曾对台湾浅滩及其周围43个有代表性的样品进行了化学分析。所用方法均为通用的分光光度法,即磺基水杨酸法测定铁;高碘酸钾法测定锰;过氧化氢法测定钛;钒钼酸铵法测定磷。
The most important conclusions of this study are:(1)The contents of Fe,Mn,Ti and P in the sediments of the Taiwan Bank are lower than those in the East China Sea and South China Sea.This is because the grain size of sediments in the area of study is coarser."The law of grain-size control"of elements is conspicuous,i.e.the average contents of elements increase gradually with the decrease in the grain size of sediments.(2)The distribution patterns of these elements are similar in most respects.The regional distributions of elements are belt-shaped and roughly parallel with the coastline.The distribution of elements is related to that of sediments and minerals.(3)We call the ratio of detrital elemental content to total elemental content in sediments"the detrital index".The index of each element during this study is in the same order of magnitude with that in the East China Sea.The detrital index of elements varies inversely as the chemical activity of elements.For example,the chemical activity of Ti is lower,but the detrital index of Ti is higher.(4)Like other continental shelves,in the area studied close correlations exist among these elements.It must be pointed out that sometimes the authigenic process can interfete with these correlations.
作者
赵一阳
车承惠
杨惠兰
贾凤梅
Zhao Yiyang;Che Chenghui;Yang Huilan;Jia Fengmei(Institute of Oceanology,Academia Sinica)
出处
《地质学报》
1981年第2期118-126,共9页
Acta Geologica Sinica
