DISTRIBUTION PATTERN OF MARINE UPPER STRUCTURAL LAYER AND FAULT SYSTEM ON THE CENTRAL UPLIFT OF THE SOUTH YELLOW SEA BASIN

There are two marine structural layers on the Central Uplift of the South Yellow Sea Basin. They are separated by a mudstone detachment zone of Lower Silurian, the Gaojiabian Formation. The upper structural layer is relatively complex, where develop thrust folds and imbricate thrust faults. Multi-channel seismic data on the Central Uplift shows that the marine structural layer is widely developed, and its thickness varies in a pattern of thick -thin-thick from west to east. Faults are developed along the strike of E-W direction, dominated by the tectonic stress of compression and strike-slip. Three structural styles of compression, extension-twisting and compression-twisting have been discovered.