卫星图像处理技术在蒙阴地区金刚石找矿预测中的应用

文章针对研究区内金伯利岩的特征,运用OIF系数确定最佳季相波段,用最小二乘法设计的大气散射校正、比值—分段线性扩展等处理程序,使处理后图像增大了对比度,展宽了与金伯利岩有关的地质体的光谱范围,提取出了与金伯利岩有关地质体的波谱信息。经处理后图像及不同比例尺的遥感图像对应分析,圈定了区内优选靶区,其中在两县色形图像异常内发现的碳酸角砾岩脉,经野外工作和室内重砂、岩石化学、REE、碳氧同位素分析表明,可能是后期碳酸岩化的角砾金伯利岩脉。两县色形异常是寻找金刚石原生矿床的有利靶区。

The Application Of LANDSAT Image Processing Technology To The Prospecting And Prognosis Of Diamond Deposits In Mengyin Area

Characteristics of kimberlites in Mengyin area have been studied with the Landsat image processing technology and images of multispectral scanner (MSS) and thermatic mapper (TM) on different scales; the effectiveness of the Landsat image preprocessing with the atmospheric correction and OIF is also discussed. It is held that the discovery of image anomalies related to kimberlites with Landsat image processing of ratio and ratio-piecewise scale is extremely important. Based on an integrated analysis of geological and geophysical data and Landsat image processing, the authors selected three color and shape image anomalies as targets in Mengyin area, in one of which the authors found three carbonate breccia veins in ell echelon arrangement which exhibited late dextraI activity. Heavy mineral, isotope and REE studies suggest that this sort of carbonate breccia might be a kimberlite which experienced late carbonate alteration.