期刊
NATURE GEOSCIENCE
卷 3, 期 3, 页码 209-213出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NGEO777
关键词
-
资金
- Continental Dynamics programme at NSF [EAR-0506622]
- Directorate For Geosciences
- Division Of Earth Sciences [0851981] Funding Source: National Science Foundation
The onset of rapid exhumation along the high relief margins of orogenic plateaux is often used as a proxy for the timing of surface uplift(1-3). However, processes that inhibit incision by rivers, such as spatially variable rock uplift(4), orographic changes in rainfall(5) and channel damming by glaciers or landslides(6,7) may lead to exhumation that significantly lags surface uplift(8). Here we reconstruct the timing, rate and pattern of fluvial incision along the Yellow River in northeastern Tibet using stratigraphic, geochronologic and geomorphic data from sedimentary basins along the present-day river course. We find that the onset of fluvial incision occurred substantially later than the onset of mountain building, 14-8 million years (Myr) ago(9). Fluvial incision initiated at the plateau margin 1.8 Myr ago(10) and progressed upstream(11) at a rate of approximately 350 km Myr(-1). We conclude that the fluvial incision was a result of a climatically driven expansion of lake systems in the region(12,13) that led to lake spillover and consequently the integration of the modern Yellow River.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据