The Analysis of the Sedimentary Character of the Microfossils and the Material Resource in the Surface Sediments from the South Yellow Sea

Key words: 
• microfossils /
• sedimentary character /
• type /
• material sources

Abstract: The area of the Yellow Sea is about 417 thousands square kilometres and is divided into north and South two parts according to the boundary line between the Chengshantou of Shandong Province and the Bailing Islands of Korea. Of which the North Yellow Sea is about 100 thousands square kilometres. The South Yellow Sea is three times as much as the North Yellow Sea. China began to study the sediments of the Yellow Sea from the 1950s and have got much scientific achievement. After 1970s,Institute of Oceanology,the Chinese Academy of Sciences the Tongji University First Institute of Oceanography,state Oceanic Administration had investigated and studied the surface and core samples from the Yellow Sea in varying degrees early or late. After the late 1980s,the previous Institute of Marine Geology,Ministry of Geology and Mineral Resources had made a study of the sequence of bedding and the stratigraphic correlation in the Quaternary.Above-mentioned study laid a foundation for the study of the South Yellow Sea. In this paper,the numbers of different microfossils and the distribution character of associations the sedimentary character the relationship among the microfossils planktonic foraminifera、calcareous nanoplank-fossils and Black Stream、the warm current of the Yellow Sea、the cold water mass、the coastal current of the Yellow Sea have been studied by means of the analysis of microfossils in the surface sediments from the South Yellow Sea. At same time,according to the data of size,the types of the surface sediments have been divided as follows:in the middle-west areas of the South Yellow Sea,1. clay 2. silt clay 3. fine-sand and silt 4. sand-gravel and mixtum,and in the east area,the sediments are arranged for inturn sand 、mud sand、sand mud and mud from the north to the south. In addition,the material resource in the surface sediments from the South Yellow Sea might be summed up following:1. the material cources of the Yellow River 2. the material sources of the Changjiang 3. the material sources of the remnant sand 4. the material sources of the Hanjiang and ]in- jiang etc. (Korean). 5. the material sources of eolian depos.