STUDY ON DYNAMIC EVOLUTION FEATURES OF GRAVITY FIELD IN SOUTHERN TIANSHAN AREA,XINJIANG
The difference between two adjacent period of mobile gravity value are calculated using mobile gravity measurement data of last 10 times from 2010 to 2013 in Southern Tianshan area,the spatial and temporal dynamic characteristics of gravity field in this area are studied,and the relationship between gravity field variation and seismic activity are discussed. The result shows that the gravity field variation trend presents the characteristics of enhancement in the west and decrease in the east by the boundary of Bachu and Maigaiti area. Extreme value areas of gravity variation appeared mostly in the intersection area of Southern Tianshan and Western Kunlun,and gravity field variation gradient is larger than other area. The gravity field variation gradient is smaller and more stable in the Tarim basin.