The study of deep-water gravity flow deposits has a history of a hundred years.The latest research includes the genesis mechanism,type,and sedimentary phase model for gravity flow.Considering the rheological characteristics of fluids and the sediment support mechanism,some scholars classified sediment gravity flow in-to five categories:turbidity flow,fluidized flow,liquefied flow,granular flow,and viscous debris flow.Later,some scholars proposed a three-terminal classification to divide gravity flow into four types:muddy debris flow,sandy debris flow,turbidity flow,and granular flow,in which the accuracy and practicality of the classification are greatly improved.There are currently three mechanisms for the genesis of deep-water gravity flow,includ-ing sediment re-transportation under multiple triggering mechanisms,continuous sediment replenishment,and unloading and sedimentation of floating fluid.The main sedimentary models are the Walker integrated fan mod-el and the Shanmugam deep-water slope fan model.Deep-water gravity flow deposits play an important role in oil and gas geology as a good reservoir and transport channel,and they can interact with other sedimenta-ry systems to form multiple types of traps.The research on deep-water gravity flow deposits still faces issues such as a lack of unified terminology,shallow research on gravity flow state transformation,and sampling diffi culties.In the future,the application of high-precision exploration technology should be further applied to ob-serve and sample deep-water deposits more accurately;guided by the"source-sink"concept,the application of physical simulation and numerical simulation to the deep-water gravity flow research should be strengthened;global comparative research on deep-water gravity flow deposits should be carried out,and an international data sharing platform should be established.
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