重磁异常解释断裂构造的处理方法及图示技术

利用重磁异常解释断裂是地质构造研究的主要手段之一.重磁异常解释断裂通常是在等值线图或剖面平面图上进行的,而重磁异常在进行等值线网格化成图时会造成微弱信息丢失,这些原因造成重磁异常解释断裂的多解性.本文对重磁异常数据在化极、曲面延拓处理的基础上,采用水平梯度法提取延拓曲面上的重磁异常梯度带,之后对断裂带进行窄化处理,通过图示技术将重磁异常数据转换成灰度值,图像的灰度值以变密度显示,形成彩色的变密度图像,这样就提高了数据图像识别断裂的视觉效果.该方法应用在鄂尔多斯盆地不同层次(时间序列)的断裂研究中,提取和识别重磁异常特征所反映的断裂信息,效果较好.

Magnetic and gravity data processing method and imaging techniques for faulted structure interpretation

Using magnetic and gravity anomaly to interpret faulted structure is a main method for sdutying geological structure.Usually,multi-conclusion is got on isoline map of magnetic and gravity anomaly for interpreting faulted structure,because weak information of magnetic and gravity anomaly is lost in isoline netting.After extracting the gradient zones of magnetic and gravity anomaly on different upward continuation curved plane by horizontal gradient method,and faulted structure zones are narrowly processing,the processing result of magnetic and gravity data is translated into gray shade scale and variance density by using imaging techniques.It is good effcet to extract and recognise faulted structure on variance density image of magnetic and gravity anomaly.This method is applied for recognising differential sediment strata(time series)in Ordos basin.