岩矿体斜断层重力特征点序列灰色反演研究

Grey inverse method used gravity characteristic point sequence for dip fault of rock and mine

迄今为止,由于实测异常的最大值和坐标原点无法准确标定,人们一直不能直接利用某一种重力异常曲线求解岩矿体斜断层的反演问题,一般只能从异常曲线特征上作些定性分析。通过引入辅助坐标原点,提出了V_(xx)归一化异常特征点和差商变换,应用灰色系统关联理论,得到了一种仅利用V_(xx)异常反演倾斜矿体断层的非图解新方法。最后,给出的应用实例说明新方法不仅是正确和有效的,而且还具很强的抗干扰能力。图3,表1,参15。

Up to now, it has been very difficult that the physical and geometrical parameters of dip fault or the inclined step-like buried geological body are obtained by directly a certain kind of the gravity anomaly curves. Generally speaking, the qualitative analysis can be only performed in terms of some feature of a kind of anomaly curve. In this paper, firstly, function of the gravity bivalent derivative anomaly Vxz and its characteristic point sequence of theoretical inclined steps are analyzed particularly, the normalized gravity bivalent derivative anomaly Vxz, normalized characteristic points and their sequences, and differential- ratio transformation for inclined steps are presented in the paper. Secondly, an assistant coordinate origin is presented, on the grounds of the theory of gray system. Thirdly, a new gray relational inverse method is obtained. By this method, all the unknown parameters of dip fault or inclined steps can be computed directly by means of the anomaly Vxz curve. Finally, this new method is successfully proved by means of an instance. 3figs. ,1tab. ,15refs.