Depositional setting of Pearl River Mouth basin in the west of Dongsha Islands is relativelystable and large scale faults are few between uplift and depression.

• 而从东沙群岛西部的珠江口盆地的沉积环境相对比较稳定,位于隆起和坳陷分界处规模较大的活动断层相对比较少,缺乏气体运移通道。