| Autor: |
Kaiqi Yu, Elda Miramontes, Tiago M. Alves, Wei Li, Linlin Liang, Shuang Li, Wenhuan Zhan, Shiguo Wu |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
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| ISSN: |
0094-8276 |
| Popis: |
The genesis of submarine channels is often controlled by gravity flows, but channels can also be \udformed by oceanographic processes. Using multibeam bathymetry and two-dimensional seismic data from the \udwestern South China Sea, this study reveals how pockmarks can ultimately form channels under the effect of \udbottom currents and gravity-driven sedimentary processes. We demonstrate that alongslope and across-slope \udchannels were initiated by pockmark trains on the seafloor. Discrete pockmarks were elongated due to the \uderosion of gravity-driven sedimentary processes and bottom currents, and later coalesced to form immature \udchannels with irregular thalwegs. These gradually evolved into mature channels with continuous overbanks and \udsmooth thalwegs. Submarine channel evolution was significantly influenced by seafloor topography since the \udLate Miocene. The evolutionary model documented here is a key to understanding how channels are formed in \uddeep-water environments. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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