| 长江第一湾成因新探 |
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| 引用本文： | 史正涛,明庆忠,董铭.长江第一湾成因新探[J].云南地理环境研究,2006,18(3):1-6. |
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| 作者姓名： | 史正涛 明庆忠 董铭 |
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| 作者单位： | 1. 云南师范大学,旅游与地理科学学院,云南,昆明,650092;中国科学院地球环境研究所,黄土与第四纪地质国家重点实验室,陕西,西安,710075
2. 云南师范大学,旅游与地理科学学院,云南,昆明,650092 |
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| 基金项目： | 中国科学院资助项目;云南省科技攻关项目;云南省自然科学基金 |
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| 摘 要： | 长江第一湾成因是一个复杂而重大的科学问题,近百年来已经进行了大量的研究工作,但至今还悬而未决.根据前人的研究资料和该区有关的地质、地貌、湖泊沉积等研究的最新成果,在分析滇西北晚新生代以来水系演化和金沙江河谷发育的基础上提出：石鼓附近的长江第一湾是古金沙江支流水洛河汇入古金沙江的河汉;早更新世末期老君山一带东西向隆起的阻挡作用,使古金沙江沿其支流水洛河下游段逆向北流,在三江口与已袭夺了水洛河的川江汇合,至此,现代意义上的金沙江形成了,石鼓附近的古金沙江与其支流汇合处也成为名副其实的“长江第一湾”,而三江口附近的“长江第二湾”则是川江袭夺古金沙江支流水洛河形成的袭夺湾.
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| 关 键 词： | 长江第一湾 古金沙江 水洛河 河流袭夺 |
| 文章编号： | 1001-7852(2006)03-0001-06 |
| 收稿时间： | 2005-07-03 |
| 修稿时间： | 2005-09-16 |
A NEW DISCUSSION ON THE ORIGIN OF THE FIRST TURN OF YANGTZE RIVER |
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| SHI Zheng-tao,MING Qing-zhong,DONG Ming.A NEW DISCUSSION ON THE ORIGIN OF THE FIRST TURN OF YANGTZE RIVER[J].Yunnan Geographic Environment Research,2006,18(3):1-6. |
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| Authors: | SHI Zheng-tao MING Qing-zhong DONG Ming |
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| Abstract: | The great turn near Shigu in the Jingsha River is named for the first turn of Yangtse River.Close attention has been kept giving the cause of that phenomenal formation from the home country to the outside in hundred years past.It is still a suspense though lots of scholars in geology and geography have done research for this question.According to researching data and last achievements in geology,physiognomy and lake sediments,and based on the research of the development of water system and valleys in late-Cainozoic in north-west Yunnan Province,we put forward such three following opinions :(1)The first turn of Yangtse River is the branch formed by the Shuiluo River gathering with old Jingsha River.(2)At the end of early-Pleistocene,because of the block of Laojun mountain,the old Jingsha River flowed northward along with the watercourse of Shuiluo River and converged with Chuan River at the three Rivers intersection,till that time formed the modern Jingsha River and the worthy first turn of Yangtze River.(3)The second turn near the three Rivers intersection is the capturing fork formed by Chuan River capturing Shuiluo River,the latter is a branch of old Jingsha River. |
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| Keywords: | the First Turn of Yangtze River old Jingsha River Shuiluo River river capture |
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