化探观测值Z可视为观测点坐标X,Y的函数:Z=T(X,Y)趋势分析“把观测值划分为两部分:趋势部分和偏差部分”[1,—11]:Z= +e其中—趋势值;e—偏差,也称剩余,包括局部异常和误差[2,—2]。目前,区域化探中较为普遍应用的多项式拟合趋势分析,其应用目的往往在于“以 The geochemical observation Z can be regarded as a function of the coordinates X, Y of the observation point: Z = T (X, Y) Trend Analysis “The observation is divided into two parts: the trend part and the deviation part [1, -11] = + e where - trend value; e-bias, also called residual, including local anomalies and errors [2, -2]. At present, the trend analysis of polynomial fit commonly used in regional geochemical exploration is often aimed at ”