Sedimentary Characteristics of the Hyperpycnal Flow in the Modern Yellow River Delta

Abstract

<span style="font-size:11.0pt;font-family: " times="" new="" roman","serif";mso-fareast-font-family:simsun;mso-bidi-font-family:="" mangal;mso-ansi-language:en-gb;mso-fareast-language:en-us;mso-bidi-language:="" hi"="" lang="EN-GB">Based on the analysis of 3,372 sediment samples and 108 km stratigraphy profiles from the modern Yellow River delta, the results show that fine granule sediments is primary, clay silt and silt is its main sediment types. It mainly consists of two parts: saltation load and suspension load, leaking of bed load. With the decreasing of turbulence intensity seaward, it could be divided into two different hydrodynamic sedimentary environment, one is a strong hydrodynamic conditions represented by sedimentary of river bed and river mouth bar, the other one is represented by prodelta and lateral margin sediments, it is a week hydrodynamic sedimentary condition. Hyperpycnal flow belongs to the category of gravity flow and the modern Yellow river delta is a gravity flow controlled sedimentary system. Hyperpycnal flow deposits of modern Yellow River delta is an elliptic sedimentary body which typically characterized by thin on both sides with thick in the middle and the long axis parallel to the coastline.</span>