Abstract:

The styles of depositional system in marine sequence have been studied in South China. As a result, there are three styles of depositional systems: the depositional systems of continent, the depositional systems of transition between marine and continent, the depositional systems of marine. They can been further divided into fourteen systems and several sub-facies and delicate facies in South China. The relationship between the depositional systems and source rocks of the marine sequences in South China is very close. The favorable facies for source rock development is basin or open sea terrace. There are favorable conditions for hydrocarbon generation and higher content of TOC in the marsh facies which is between the marine facies and continental facies , and middle to better conditions for hydrocarbon generation in those facies such as open sea terrace, shallow sea terrace , terrace margin, slop, and shelf.

Key words: depositional system, source rock, marine sequence, South China