淮河形成时代探析  

Formation age of the modern Huaihe River

作　　者：李宗盟 高红山[3] 刘芬良 王帅 武茹丽 张辰光 LI Zongmeng;GAO Hongshan;LIU Fenliang;WANG Shuai;WU Ruli;ZHANG Chenguang(School of Geographic Sciences,Xinyang Normal University,Xinyang 464000,Henan,China;Henan Key Laboratory for Synergistic Prevention of Water and Soil Environmental Pollution,Xinyang 464000,Henan,China;College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730000,China;School of Municipal and Surveying Engineering,Hunan City University,Yiyang 413000,Hunan,China)

机构地区：[1]信阳师范学院地理科学学院,河南信阳464000 [2]河南省水土环境污染协同防治重点实验室,河南信阳464000 [3]兰州大学资源环境学院,兰州730000 [4]湖南城市学院市政与测绘工程学院,湖南益阳413000

出　　处：《地理科学进展》2020年第10期1708-1716,共9页Progress in Geography

基　　金：国家自然科学基金项目(41901007,41801032);信阳师范学院南湖学者奖励计划青年项目。

摘　　要：淮河作为中国7大江河之一,有关其形成时代的研究相对匮乏且存在较大的争议。论文通过梳理淮河流域内已有的研究工作,综合层状地貌面和沉积地层记录探讨了淮河不同河段的形成时代。新生代期间,淮河流域内的水系曾经历2次较大的调整,分别发生在古近纪末和上新世末。古近纪和新近纪期间,淮河流域曾广泛发育湖泊沉积,以河湖相沉积环境为主。而第四纪期间,流域内古地理环境逐渐过渡为以河流相沉积环境为主。现代淮河河湖体系的形成发生在早至中更新世,其后经历不断的演变至今。构造活动和气候变化是驱动淮河流域水系演变的主因。上新世末至早更新世初的青藏运动导致了淮河流域内新近纪水文体系的解体,而晚新生代以来气候的转冷可能是湖泊萎缩、河流作用增强的诱因。Development and evolution of large rivers is a classic subject of geomorphology. As one of the seven large rivers in China, the Huaihe River locates in China’s north-south transitional zone. However, there is much controversy about its formation and development. In this study, we explored and discussed the formation of different sections of the Huaihe River based on the analysis of topography and sedimentary stratigraphy. The results show that there were two major adjustments of the river system in the Huaihe River Basin during the Cenozoic period, which occurred at the end of the Paleogene and the end of the Pliocene, respectively. During the Paleogene and Neogene periods, lacustrine sediments were extensively developed in the Huaihe River Basin,with the sedimentary environment dominated by rivers and lakes. However, during the Quaternary period, the sedimentary environment in the basin gradually changed to a river-dominated system. The formation of the modern river-lake system in the Huaihe River Basin occurred in the early-to mid-Pleistocene. Tectonic activities and climate change were the main drivers of the evolution of the Huaihe River system. The Qingzang Movement from the late Pliocene to the early Pleistocene led to the disintegration of the Neogene hydrological system in the Huaihe River Basin. In addition, the cooling climate in the Late Cenozoic may be the cause of decreasing lake developments and increasing river activites.

关 键 词：形成时代 层状地貌面 沉积地层 淮河 

分 类 号：P343.1[天文地球—水文科学]