Northern Continental Slope Palaeogeomorphology and Deep-water Fan System Response of Pearl River Since 13.8Ma, South China Sea
- Received Date: 2005-08-16
- Rev Recd Date: 2005-12-10
- Publish Date: 2006-08-10
-
Key words:
- Baiyun sag of Pearl River Mouth Basin /
- palaeo-pearl river submarine fan systems of South China Sea /
- sequence stratigraphy /
- geophysical method /
- Palaeogeomorphology
Abstract: Implied integrated sequence stratigraphy and geophysical method to analyze the 13.8Ma palaeogeomorphology of Baiyun sag, Pearl River Mouth Basin(PRMB). Submarine fan systems distribution,deposit characteristics and sequence stratigraphy filling evolvement analysis on sequence development from 13.8Ma implied that Baiyun sag lies in wide-slow continental shelf's slope area and develop two types canyons/channels on the north shelf margin , that Baiyun sag became to flat and open, and that submarine fan deposition are mainly controlled by palaeogeomorphology、sediment supply and fluctuation of climate. At the same time, north of South China Sea continental slope deepwater area’s depositional topography has been similar characteristic from 13.8Ma to today, and today’s submarine valley topography by and large implicated depositional paleo-geomorphology environment. It is concluded that deepwater deposition, which are mainly controlled by paleo-topography and evolvement rather than sea level changes, had been similar depositional topography character with today.
| Citation: | Northern Continental Slope Palaeogeomorphology and Deep-water Fan System Response of Pearl River Since 13.8Ma, South China Sea[J]. Acta Sedimentologica Sinica, 2006, 24(4): 476-482.
|
DownLoad: