【摘要】 利用重力、地震层析成像等多种资料 ,并利用场分离、正反演以及阻尼最小二乘法、约束最小二乘法等数学方法 ,对重力异常进行分离 ,用地震层析成像的结果作为约束进行反演 ,得到地壳上地幔不同深度的密度分布和莫霍面深度等结果。更多还原

【Abstract】 The authors inverted density anomalies on the different layer in the depth range of 10～100 km in Sanjiang Region,using gravity field that is treated by separation and adjustment.The results of combining other geophysical data to analyse the density data show that:1) The material in Sanjiang Region possibly comes from the extension of the Qinghai_Tibet Plateau;2) Low velocity layer exits in the crust of Sanjian Region;3) The earthquake easily occurred at the inflection points of density and gravity anomalies in lithosphere,especially at the complex inflection.更多还原