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中国的海岸线北起鸭绿江口南至北仑河口,漫长而曲折,全程约32000公里(包括岛屿岸线).沿海除辽河平原、华北平原、长江下游平原三大平原外,还有许多狭长的小块沿海平原,它们与中国坦荡的大陆架相连,伸向太平洋.在第四纪期间,这些地区有海相及海陆交互相沉积,如台湾西部云林县北港地区第四系海相沉积厚达686米;华北平原第四系海陆交互相沉积也厚达400—500米左右.这些海相地层中有孔虫动物群的研究,对中国及其沿岸地区第四纪地层的划分和对比、古气候、古地理变迁的解释、新构造运动的判别,都有很大意义.近年来作者对辽宁、河北、浙江和福建等省区45个钻孔(图 1)的微体动物群的时空分布进行了初步研究.为了配合对这些有孔虫动物群的研究,还对我国24个现代陆上水域进行了有孔虫概略调查,同时参考了兄弟单位大量资料,对中国第四纪有孔虫动物群的古生态、古气候、古地理及上新世与更新世的界线进行初步讨论.
China’s coast stretches from the Yalu River estuary to the Beilun estuary in the north from long and tortuous, with a total length of about 32,000 kilometers (including the coastline of the island). Along the Liaohe Plain, the North China Plain and the lower reaches of the Yangtze River, there are many long and narrow The coastal plains, which are connected to the magnificent continental shelf in China and extend into the Pacific Ocean, have marine and intercontinental sediments during the Quaternary period. For example, the Quaternary marine sediments in North Harbor, Yunlin County, western Taiwan, are as thick as 686 meters ; Quaternary sedimentary facies in the North China Plain is also about 400-500 meters thick.The study of foraminiferal fauna in these marine strata shows the division and contrast of Quaternary strata in China and its coastal areas, paleoclimate, Interpretation of palaeogeographic changes and discrimination of neotectonic movement are of great significance.In recent years, the author conducted a study on the temporal and spatial distribution of the microflora in 45 boreholes (Figure 1) in Liaoning, Hebei, Zhejiang and Fujian provinces In order to cooperate with the investigation of these foraminiferal fauna, a survey of foraminifera was carried out in 24 modern terrestrial waters in China. At the same time, referring to a large amount of data from fraternal units, Paleoecology group, paleoclimate, ancient geography and boundaries of the Pliocene and Pleistocene preliminary discussions.