Grain size characteristics of surface sediments and the response to sedimentary environment in Fuzhou Bay, Dalian

Abstract

Abstract: Marine surface sediments from the Fuzhou Bay, the western Liaodong Peninsula, were obtained for sedimentary analysis. The characteristics of grain size are corresponding to the sedimentary environment. The grain size parameters show a significant difference among samples from various positions, as the average grain sizes range from 1.2Φ to 6.5Φ. The grain sizes are all poor sorted (1.4~2.6) with fine to coarse skewness, and display a spatial change as fine to coarse to fine from the estuary to the shallow sea. The 5 m and 10 m isobaths mark the edge of these boundaries, probably resulting from sediment transport and submarine topography. Most of river sediments can be transported to the 5 m isobath, and sediments in the area between 5 m to 10 m isobaths are mainly from river and outer sea, while little river sediments can get to west of 10 m isobaths. With the evidence of both Weibull function and mineralogy, most of the sediments in Fuzhou Bay are from the erosion of Liaodong Bay and Fuzhou Bay.

Key words: grain size analysis, surface sediment, material transport, Fuzhou Bay

CLC Number:

P736.21

LI Yan, HU Ke, WANG Ping, WANG Xue-mu, YI Liang, DONG Yong-shi. Grain size characteristics of surface sediments and the response to sedimentary environment in Fuzhou Bay, Dalian[J]. Journal of Marine Sciences, 2013, 31(3): 41-48.

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