Tectonic signals documented in gravel and silt beds: A comprehensive review of the eastern Tibetan plateau

Abstract

Extracting tectonic signals from sediments in tectonically active areas is important for revealing the history of regional tectonic activity. However, in previous studies, tectonic and climatic signals have often been confused. In this study, we discuss the tectonic signals recorded in Quaternary sediments on the eastern Tibetan Plateau, combined with the geological, geomorphic, regional climate and geographical settings, and summarize six aspects of the sedimentary characteristics of tectonically generated gravels related to seismic landslides, providing an effective reference for other tectonically active areas. In addition, earthquakes commonly cause intermittent changes in the availability of fine particles in provenance areas, which is the rationale for revealing seismic events through a high-resolution sedimentary sequence from which hydrological fluctuations can not be easily identified. The tectonic control of Quaternary sedimentation on the eastern Tibetan Plateau has improved the previous crude understanding of water flow genesis and is of considerable significance for extending research on tectonic activity and assessing seismic hazards.