CHARACTERISTICS AND ORIGIN OF THE TIDAL SAND RIDGES OFF THE MINJIANG RIVER ESTUARY, SOUTHEASTERN CHINA

LU Huiquan; WU Chengqiang; XU Yan

doi:10.3724/SP.J.1140.2014.02027

2014 Vol. 34, No. 2

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Article navigation > Marine Geology & Quaternary Geology > 2014 > 34(2): 27-36

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LU Huiquan, WU Chengqiang, XU Yan. CHARACTERISTICS AND ORIGIN OF THE TIDAL SAND RIDGES OFF THE MINJIANG RIVER ESTUARY, SOUTHEASTERN CHINA[J]. Marine Geology & Quaternary Geology, 2014, 34(2): 27-36. doi: 10.3724/SP.J.1140.2014.02027

Citation:

LU Huiquan, WU Chengqiang, XU Yan. CHARACTERISTICS AND ORIGIN OF THE TIDAL SAND RIDGES OFF THE MINJIANG RIVER ESTUARY, SOUTHEASTERN CHINA[J]. Marine Geology & Quaternary Geology, 2014, 34(2): 27-36. doi: 10.3724/SP.J.1140.2014.02027

CHARACTERISTICS AND ORIGIN OF THE TIDAL SAND RIDGES OFF THE MINJIANG RIVER ESTUARY, SOUTHEASTERN CHINA

1. College of Marine Geosciences, Ocean University of China, Qingdao 266100, China;
2. Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China

Received Date: 11 July 2013

Revised Date: 25 September 2013

Abstract

Abstract

Tidal currents dominate great part of China's continental shelves. And the tidal depositional morphology, such as sand ridges, sand sheets and sand waves (sand dunes) are widely distributed. However, tidal sand ridges have not been discovered off the Minjiang River Estuary before. This time we found a group of linear sand bodies in different sizes distributed off the Estuary in SW-NE direction. Some of them may join together becoming shallow banks, but there are erosional channels between most of the sand ridges. The southeast flank of the sand ridge is steeper than the northwest, indicating that sand ridges are migrating southeastward. According to the analysis of the topography and geomorphology, sediments and tidal current field of the area, it is concluded that the materials come from the ancient Minjiang River delta, that was formed in the inshore estuaries bay during the Holocene transgression. The current tidal system is the main factor to form the tidal ridge group.
- tidal sands ridges /
- topography and geomorphology /
- tide current /
- Minjiang River Estuary

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References

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