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Tectonic controls for transverse drainage and timing of the Xin-Ding paleolake breach in the upper reach of the Hutuo River, North China

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  • The upper reach of the Hutuo River flows along the Xin-Ding basin and cuts a transverse drainage through Xizhou Mountain and Taihang Range into the North China Plain. Previous studies showed that the Xin-Ding basin was occupied by a lake during the Early-Middle Pleistocene. However, the timing of the paleolake breach and the mechanism for the creation of the transverse drainage are unknown. We constructed the fluvial terrace sequence in the upper reach of the Hutuo drainage combined with thermoluminescence (TL) and optically stimulated luminescence (OSL) dating, as well as the timescale of the overlying loess-paleosol units. Our results reveal that (1) five terraces (T5-T1) are developed along the upper reach of the Hutuo River, amongst which terraces T4-T1 were formed synchronously at ~600 ka, ~120-130 ka, ~21-26 ka and ~6-7 ka, respectively; (2) the creation of the transverse drainage and breach of the Xin-Ding paleolake occurred between ~600 ka and ~130 ka; (3) the mechanism for the creation of the transverse drainage is via river piracy of paleostreams on both sides of the drainage divide. Localized differential uplift and associated tilting of the Xizhou Mountain block during the Middle Pleistocene result in the formation of the transverse drainage and breach of the Xin-Ding paleolake.
  • Keywords: Hutuo River, River piracy, Tectonic uplift, Loess-paleosol sequence, Transverse drainage, Xin-Ding paleolake, Fluvial terrace
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  • Ren, J., Zhang, S., Meigs, A. J., Yeats, R. S., Ding, R., & Shen, X. (2014). Tectonic controls for transverse drainage and timing of the Xin-Ding paleolake breach in the upper reach of the Hutuo River, north China. Geomorphology, 206, 452-467. doi:10.1016/j.geomorph.2013.10.016
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  • 206
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  • This work was supported by the National Science Foundation of China (grant No. 40972143) and Institute of Crustal Dynamics, China Earthquake Administration Research Fund (grant No. ZDJ2013-23).
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