用窗口平均法进行重力异常划分的可行性  

FEASIBILITY OF DIVIDING GRAVITY ANAMOLIES WITH WINDOW-AVERAGING METHOD

作　　者：孟军海[1] 陈文义[1] 霍成胜[1] 

机构地区：[1]青海省地质调查院,西宁810012

出　　处：《青海地质》2001年第B12期48-52,共5页

摘　　要：在进行重力异常解释时,根据测区重力地壳模型分析结果,为了分离出由不同深度的地质因素引起的重力异常,根据测区重力地壳模型分析结果,主要采用七种不同边长的正方形窗口平均法进行了重力场的划分试验。结果表明:使用不同边长的窗口平均法可以将布格重力异常分解为由深部场源引起的一级区域异常、中深部场源引起的二级区域异常及浅部场源引起的二级剩余异常等三部分,达到了分离布格重力异常的目的。在深部资料很少的青藏高原地区进行重力异常推断解释时,本文所示划分重力异常方法极具参考价值。In order to separate gravity anomalies caused by geological action in different depth,a square window averaging method with seven side-lengths was adopted in the gravity field dividing teston the basis of analysis result of gravity crust model. The result show that Bouguer gravity anomalies canbe divided into three parts with the window - averaging method, i. e., the first class regional anomaliescaused by deep field, the second class regional anomalies caused by middle - deep field and the secondresidual anomalies caused by shallow field. The method has a important reference value to theinterpretation of gravity anomaly, especially in Qinghai-Xizang Plateau where data of the depth is lack.

关 键 词：重力异常 划分 窗口平均法 区域异常 剩余异常 重力勘探 

分 类 号：P312[天文地球—固体地球物理学]