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中国大陆1°×1°空间重力异常和布格重力异常大体以东经104°线为界分为东、西绝然不同的两部分,东部异常变化平缓,线性异常的走向以北北东向为主,西部异常变化急剧,线性异常的走向以北西西向为主,进而还可分成异常特征明显不同的东部、中部、新疆、青藏四大区。文章初步讨论了中国大陆区域重力场与大地构造,地壳均衡和地震活动的关系,认为中国东部线性异常主要反映了北北东向新华夏构造体系,中国西部线性异常主要反映了北西西向西域构造体系,布格重力异常梯度带大都对应断块间的断裂带;布格重力异常和地形高程基本上呈负相关, 中国大陆地壳在大范围内基本处于均衡状态;地震大都发生在重力梯度带上。
The 1 ° × 1 ° space gravity anomaly in China and the Bouguer gravity anomaly are generally divided into east and west by two distinct parts by the East 104 ° line. The anomalous change in the east is gentle and the linear anomaly is mainly north-north-eastward , The anomalous changes in the west are steep and the linear anomalies are mainly in the northwestern and western directions, which in turn can be further divided into four major areas of eastern, central, Xinjiang and Qinghai provinces with significantly different anomalies. The paper preliminarily discussed the relationship between the gravitational field and tectonics, crustal equilibria and seismicity in the Chinese mainland. It is concluded that the linear anomalies in the eastern China mainly reflect the NW-trending Neo-Cathaysia tectonic system, and the linear anomalies in the western China mainly reflect the NW-West structural system The Bouguer gravity anomaly gradient belts mostly correspond to the fault zones between the fault blocks. The Bouguer gravity anomalies are basically negatively correlated with the terrain elevation. The crust in China is basically in an equilibrium state over a large area. Most of the earthquakes occur on the gravity gradient belt.