Contrast of gravity flows between shallow water and deep water in Pearl River Mouth Basin
Online published: 2011-04-20
Based on core observation, the structural features of the gravity flows in shallow water and deep water are analyzed in the aspects of bedding, biological activity, special structure and Bouma sequence. The external features are contrasted in the aspects of gravity flow type, sedimentary dynamics mechanism and facies model, and the formation mechanisms of the two types of gravity flows are analyzed. The result shows that in the shallow water, there are many beddings, frequent biological activities and tide beddings, the gravity flow type is full and the influences of fluvial, waveness and tide processes are apparent;While in the deep water, there are simple bedding, scarce biological activity and obvious Bouma sequence, the gravity flowtype is simple, and entire fan model and trough model are formed. Based on the formation mechanismanalysis of these two types of gravity flows，it is believed that the main influencing factor for the gravity flows in deep water is slope gradient，and the influencing factor for the gravity flows in shallow water is sediment supply.
WANG Fang , ZHANG Chunsheng , XIAO Menghua , LI Li , ZHAO Enzhang . Contrast of gravity flows between shallow water and deep water in Pearl River Mouth Basin[J]. Lithologic Reservoirs, 2011 , 23(2) : 59 -63 . DOI: 10.3969/j.issn.1673-8926.2011.02.011
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