TY  - JOUR
A1  - Wang, Yongbo
A1  - Herzschuh, Ulrike
A1  - Liu, Xingqi
A1  - Korup, Oliver
A1  - Diekmann, Bernhard
T1  - A high-resolution sedimentary archive from landslide-dammed Lake Mengda, north-eastern Tibetan Plateau
JF  - Journal of paleolimnolog
N2  - Lacustrine sediments have been widely used to investigate past climatic and environmental changes on millennial to seasonal time scales. Sedimentary archives of lakes in mountainous regions may also record non-climatic events such as earthquakes. We argue herein that a set of 64 annual laminae couplets reconciles a stratigraphically inconsistent accelerator mass spectrometry (AMS) C-14 chronology in a similar to 4-m-long sediment core from Lake Mengda, in the north-eastern Tibetan Plateau. The laminations suggest the lake was formed by a large landslide, triggered by the 1927 Gulang earthquake (M = 8.0). The lake sediment sequence can be separated into three units based on lithologic, sedimentary, and isotopic characteristics. Starting from the bottom of the sequence, these are: (1) unweathered, coarse, sandy valley-floor deposits or landslide debris that pre-date the lake, (2) landslide-induced, fine-grained soil or reworked landslide debris with a high organic content, and (3) lacustrine sediments with low organic content and laminations. These annual laminations provide a high-resolution record of anthropogenic and environmental changes during the twentieth century, recording enhanced sediment input associated with two phases of construction activities. The high mean sedimentation rates of up to 4.8 mm year(-1) underscore the potential for reconstructing such distinct sediment pulses in remote, forested, and seemingly undisturbed mountain catchments.
KW  - Earthquake
KW  - Landslide
KW  - Natural dam
KW  - Tibetan Plateau
Y1  - 2014
U6  - https://doi.org/10.1007/s10933-012-9666-6
SN  - 0921-2728
SN  - 1573-0417
VL  - 51
IS  - 2
SP  - 303
EP  - 312
PB  - Springer
CY  - Dordrecht
ER  -