滇西北老君山地区岩浆活动与 长江第一弯形成的关系
收稿日期: 2001-06-04
修回日期: 2001-09-26
网络出版日期: 2002-05-25
基金资助
国土资源部资源与环境科技攻关项目(95-02-001-02)部分资助
Relationship between the Formation of the First Bent of Changjiang River and the Magmatic Activity in Laojunshan District
Received date: 2001-06-04
Revised date: 2001-09-26
Online published: 2002-05-25
Supported by
Project of the Ministry of Land and Resources, No.95-02-001-02
曾普胜 . 滇西北老君山地区岩浆活动与 长江第一弯形成的关系[J]. 地理学报, 2002 , 57(3) : 319 -326 . DOI: 10.11821/xb200203008
Based on field observations, the author proposes a new understanding on the formation of the First Bent of the Changjiang River. It is the first time to study the relationship between the formation of the First Bent of the Changjiang River and Eocene magmatic activity, suggesting that the First Bent of the Changjiang River is the result from choking of the strong magma activity in Eocene. As a result, the upstream of the river became a natural reservoir, with channel bursting into breach between Mt. Yulong and Mt. Haba, making Jinshajiang River run eastward. At the same time, the plateau uplift and the drastic dissection of river channel led to the formation of the Tiger Leaping Gorge. Taking Mt. Yulong as a base, the magnitude of uplifting in the study area (located in the eastern of the Tibetan Plateau) is calculated, with the magnitude being 3300 m from Eocene to Pliocene, adding 700 m since Pleistocene, totaling 4000 m or so.
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