Plan of the heishi river domal structure .

黑石河上游北穹窿构造群平面图。

The authors used gravity gradient anomalies to interpret the southwest sea basin of the south china sea and obtained the domal structure plane with the ne-trending spreading axis of the sea basin as the symmetric axis .

本文利用重力梯度异常对南海西南海盆进行了解释，得到大致以西南海盆北东向扩张轴为对称轴的穹隆状构造面。