论文部分内容阅读
据历史记载,两千多年来,黄河决口1500多次,重要的改道26次,其中大改道9次.公元1194年,黄河曾夺淮南注黄海,至1855年,黄河抢夺徙驻河再次调头北去.在1194～1855年的661年间,古黄河以填海造陆的巨匠身份,塑造了一个大型的三角洲,而旧黄河水下三角洲的研究过去并未见有专门报导.1973年—1979年期间,海洋地质调查局曾在旧黄河水下三角洲海区开展过比例尺为1:50万的海洋地质综合概查和旧黄河口的浅滩地质路线性调查.沉积物取样网距为5×6到10×10公里,连续测深的线距为10公里.比较系统地取得了海水、海底地形、表层和沉积物柱状样的地质、生物、化学等方面的系统资料.在分析研究上述资料的基础上),本文就旧黄河水下三角洲的沉积物和沉积相进行初步的探讨.
According to historical records, the two thousand years, the Yellow River burst more than 1,500 times, the important diversion 26 times, of which the large diversion 9. AD 1194, the Yellow River had captured the Yellow Sea in Huainan, to 1855, the Yellow River to rob the resettlement in the river again North to the north .In 661 years from 1194 to 1855, the ancient Yellow River created a large delta by reclamation, and the past Yellow River delta has never been reported in the past. During that period, the Marine Geological Survey conducted a general survey of marine geology with a scale of 1: 500000 and a geological survey of shallow beaches on the old Yellow River estuary in the Yellow River submarine delta area, with sediment sampling grids ranging from 5 × 6 to 10 × 10 km and the line distance of continuous sounding is 10 km.The system data of geology, biology and chemistry of seawater, seafloor topography, surface layer and sediment column are systematically obtained.On the basis of analyzing and studying the above data ), This paper discusses the sediments and sedimentary facies of the old Yellow River subaqueous delta.