滇西北沙溪—鸿文谷地的成因研究——金沙江河流袭夺问题的再商榷

不少中外学者曾认为,滇西北金沙江畔的沙溪—鸿文谷地是金沙江袭夺前的古河谷。本文认为,沙溪—鸿文谷地完全受断裂控制。它是一条自上新世以来,沿剑川断裂由南向北发展,直到全新世初才完全形成的断陷谷。它的形成与金沙江完全无关。当然在早、中更新世不可能有金沙江河流袭夺。

A STUDY ON THE GENESIS OF SHAXI -HONGWENVALLEY IN NORTHWEST YUNNAN——AN ONCE MORE DISCUSSION ON THE CAPTUREPROBLEM OF THE JINSHA RIVER

: many scholars thought that the Shaxi-Hongwen valley on the bank of Jinsha river in the northwest of Yunnan province might have been the ancient valley before the Jinsha river was captured. This article shows that the Shaxi-Hongwen valley is controlled completely by faults. The valley, which was developed from south to north along Jianchuan faults since Pliocene Epoch, is a typical fault-subsidence valley and it was formed completely until the early Holocene Epoch, Its formation had nothing to do with neither Jinsha river nor Jinsha river capture.