The origin and evolution of the Temi paleolandslide-dammed lake in the upper Jinsha River

被引：0

作者：

Chen J. ^{[1
]}

Cui Z. ^{[2
]}

Chen R. ^{[1
]}

Zheng X. ^{[1
]}

机构：

[1] School of Engineering and Technology, China University of Geosciences (Beijing), Beijing

[2] College of Urban and Environmental Sciences, Peking University, Beijing

来源：

Earth Science Frontiers | 2021年 / 28卷 / 02期

关键词：

Evolution; Lacustrine deposits; Landslide-dammed lake; Outburst deposits; The upper Jinsha River;

D O I：

10.13745/j.esf.sf.2020.9.9

中图分类号：

学科分类号：

摘要：

In the Batang-Zhongza segment of the upper Jinsha River on the southeastern margin of the Tibetan Plateau, major plaeolandslides were widely developed along either bank of the river, some had blocked the river flow to form dammed lakes. The large scale Temi paleolandslide-dammed lake is one of them, however, its origin and evolution have not yet been reported. In this study, we investigated the geomorphology and sedimentology of the Temi paleolandslide-dammed lake through field investigation, remote sensing interpretation and optical stimulated luminescence dating, and analyzed its origin and evolutionary processes. The study results indicated that the Teimi paleolandslide-dammed lake was caused by a major landslide blocking the Jinsha River, triggered by the intensive paleoearthquakes in this area. The maximum lake area and volume were about 1.42×107 m2 and 1.46×109 m3, respectively. The formation time of this paleolake was ~1.8 ka BP, and the time of its breaching was ~1.4 ka BP, with a peak discharging of 55858 m3/s, implying that the Temi paleolandslide-dammed lake were stable for about 400 years. © 2021, Editorial Office of Earth Science Frontiers. All right reserved.

引用

页码：85 / 93

页数：8

共 26 条

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