Dispersal of the Zhujiang River (Pearl River) derived sediment in the Holocene |
| |
| Authors: | GE Qian LIU J P XUE Zuo and CHU Fengyou |
| |
| Institution: | 1.Key Laboratory of Submarine Geosciences, State Oceanic Administration, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China2.Department of Marine, Earth and Atmospheric Sciences, North Carolina State University, Raleigh, NC 27695, USA |
| |
| Abstract: | High-resolution Chirp profiling and coring reveals an elongated (ca. 400 km) Holocene Zhujiang River (Pearl River)-derived mud area (maximum thickness>20 m) extending from the Zhujiang River Delta, southwestward off the Guangdong coast, to the Leizhou Peninsula. Two depo-centers, one proximal and one distal, are identified. On the continental shelf off the west Guangdong Province, the mud is deposited in water depth shallower than 50 m; while to the southeast of the Zhujiang River Estuary, the mud area can extend to the -120 m isobath. A combined analysis with the stratigraphic sequences of other muddy deposits in the Western Pacific marginal seas (mainly Changjiang (Yangtze) and Huanghe (Yellow) Rivers derived) indicates that the initiation of the Zhujiang River muddy deposit can be further divided into two stages: Stage 1 is before the mid-Holocene sea-level highstand (ca. 7.0 cal. ka BP), the proximal mud was mostly deposited after 9.0 cal. ka BP, when the sea-level rose slowly after the Meltwater Pulse -1C; Stage 2, after the mid-Holocene sealevel highstand, clinoform developed on the continental shelf off the west Guangdong Province, extending ca. 400 km from the Zhujiang River Estuary. The proximal clinoform thins offshore, from ca. 10 m thickness around 5-10 m water depth to less than 1-2 m around 20-30 m water depth. In addition, we also find a developed distal clinoform in the east of the Leizhou Peninsula. |
| |
| Keywords: | South China Sea Zhujiang River mud clinoform |
| 本文献已被 CNKI 维普 SpringerLink 等数据库收录！ |
| 点击此处可从《海洋学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《海洋学报(英文版)》下载免费的PDF全文 |
|
