Feature of gravity flow deposit of the Zhuhai and Zhujiang Formations of Cenozoic in Huizhou area，Pearl River Mouth Basin
Qiao Bo1 Zhang Changmin1 Li Shaohua1 Du Jiayuan2 Zhu Rui1
1 Key Laboratory of Oil and Gas Resources and Exploration of the Ministry of Education, Yangtze University, Jingzhou 434023, Hubei; 2 Shenzhen Branch, CNOOC, Guangzhou 510240, Guangdong
Abstract：Gravity flow deposits were identified from the cores of Zhuhai and Zhujiang Formations of Cenozoic in Huizhou area, Pearl River Mouth Basin.Three types of the gravity flow deposits are classified in the study area，including slump deposits，liquefaction deposits and turbidity flow.Slump deposit is the most important one；water-escape structures are abundant in liquefaction deposits；turbidity flow deposit is characterized by incomplete Bouma sequences.The gravity flow deposits in Huizhou area are formed by slumping，transporting and depositing of the sandbody in delta front.Meanwhile，tidal influenced sediments are also presented in the gravity flow deposits.Tidal deposits are associated with gravity flow sediments.It is realized that there are some misunderstanding about gravity flow，such as equal the gravity flow to the turbidity flow simply，limit gravity flow in deep water area，abuse the Bouma sequence，and so on.So a new understanding about gravity flow is needed.
Qiao Bo,Zhang Changmin,Li Shaohua et al. Feature of gravity flow deposit of the Zhuhai and Zhujiang Formations of Cenozoic in Huizhou area，Pearl River Mouth Basin[J]. JOPC, 2013, 15(1): 69-76.
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