结合现代大地测量成果探讨中国东部构造运动的力源问题

Use Modern Geodetic Result to Discuss the Tectonic Power of Eastern China

对中国东部所处的构造环境进行了分析和研究 ,结合现代大地测量成果 ,指出中国东部地壳运动主要是受陆陆碰撞 ,大洋板块俯冲及由二者引起的地幔对流三种主要因素控制 ,其中以印度板块与欧亚大陆的碰撞和菲律宾海板块向欧亚大陆的俯冲对中国东部的水平地壳运动及地幔对流对中国东部地壳垂直运动的影响占主导地位。在水平方向上 ,中国东部地壳的主应力方向为近东西向的压应力 ,但总体上是向东推移的。在垂直方向上 ,表现为南部隆升 ,北部沉陷。

Tectonic environment of eastern China is studied in this paper with the modern geodetic results. Three main factors work on the crustal movement in eastern China which are collision between continents, subduction of ocean and mantle convection resulting from the above two factors. In the three factors,the collision between Eurasian plate and India plate and the subduction from Philippine Sea plate to Eurasian plate are the main factors affecting the horizontal crustal movement, mantle convection vertical crustal movement. The main horizontal stress in eastern China is the pressure near EW direction, but as a whole, the crust is moving east. On vertical movement the south rises and the north falls.