Pre-Miocene birth of the Yangtze River

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Abstract

The development of fluvial systems in East Asia is closely linked to the evolving topography following India-Eurasia collision. Despite this, the age of the Yangtze River system has been strongly debated, with estimates ranging from 40 to 45 Ma, to a more recent initiation around 2 Ma. Here, we present 40Ar/39Ar ages frombasalts interbedded with fluvial sediments from the lower reaches of the Yangtze together with detrital zircon U-Pb ages from sand grains within these sediments. We show that a river containing sediments indistinguishable from the modern river was established before ~23 Ma. We argue that the connection through the Three Gorges must postdate 36.5 Ma because of evaporite and lacustrine sedimentation in the Jianghan Basin before that time. We propose that the present Yangtze River system formed in response to regional extension throughout eastern China, synchronous with the start of strike-slip tectonismand surface uplift in eastern Tibet and fed by strengthened rains caused by the newly intensified summer monsoon.

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APA

Zheng, H., Clift, P. D., Wang, P., Tada, R., Jia, J., He, M., & Jourdan, F. (2013). Pre-Miocene birth of the Yangtze River. Proceedings of the National Academy of Sciences of the United States of America, 110(19), 7556–7561. https://doi.org/10.1073/pnas.1216241110

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