Sea Level Change Controlled the Sedimentary Processes at the Makran Continental Margin Over the Past 13,000 yr

Abstract

Climate change, sea level fluctuations, and tectonic uplift play key roles in the evolution of sedimentary systems on continental margins. In the Arabian Sea, the Makran continental margin is suitable for studying these processes during the Holocene due to its high sedimentation rate and continuous sequence of Holocene sediments. Here, high‐resolution clay mineral and grain size analyses have been conducted to better understand the sedimentary process and controlling factors over the past 13,000 yr. The results show that the influence of Indus‐derived sediments on the Makran continent margin is negligible. Holocene relative sea level fluctuations can strongly control the shelf accommodation space due to the narrow shelf, which in turn affects the deposition process at the Makran continental margin. The sediment records at the central Makran continental margin are more suitable for studying ancient earthquakes or tsunamis.

The Numerical Investigation of Solid–Liquid Two-Phase Flow Characteristics Inside and Outside a Newly Designed 3D Sediment Trap

“…where v is the dynamic viscosity coefficient of water; at 10 • C, v ≈ 0.01 cm/s 2 . According to Equations ( 17) and (18), to mobilize all particles with a diameter ≤ 0.5 mm, the environmental flow velocity needs to reach 30.72 cm/s. Therefore, to ensure that all particles can be mobilized, the range of the sea current inlet velocity (velocity of face 1) is set to 0.3 m/s-3 m/s, with a set of velocities set every 0.3 m/s, totaling 10 sets of velocity conditions.…”

“…By studying the processes of sediment suspension and transportation and accurately capturing sediment particles, we can gain a deeper understanding of the process of sediment transformation from a "source" to a "sink". This can help us reasonably explain the characteristics of sediment suspension and transportation and the geomorphological evolution of the coastal zone under different sea states and spatial conditions [15][16][17][18][19][20][21][22][23].…”