【摘要】 利用2005—2009年流动重力观测资料,分析新疆南天山地区重力场动态变化特征,并给出一年尺度的重力场变化图像,结合重力段差时序图以及GPS计算资料分析2008年10月5日乌恰西6.8级地震与重力场、应变场的关系,并综合分析区域重力场与动力构造环境的响应关系。结果表明:重力场变化与区域应力-应变场微动态活动有关,重力场变化反映出应力场引起的重力源兆变化特征。更多还原

【Abstract】 Using the mobilely gravimetric data from 2005 to 2009,the dynamic changes of the gravity field in the South Tianshan Mountain area of Xinjiang is analyzed,and its patterns by year are given.Furthermore,combined with time series of gravity difference value and computed GPS data the intrinsic relations between the gravity and strain fields and the Ms6.8 earthquake on Oct.5,2008 in the west to Wuqia are analyzed.At last,the response of local gravity field to tectonic conditions is analyzed as well.It is shown that the change of gravity field is related to the minidynamic activity of local stress-strain field,i.e.the change of gravity reflects the precusory change feature of the gravity source caused by the strain field change.更多还原