The Essence of Techniques and Methodology of Geophysics and Remote Sensingfor Exploration of Sylvinite in China

摘要

Owing to the severe shortage of the potash fertilizer in China great attention has been paid to the study of new methods, including gumma-spectrometric well-logging, airborne gamma-spectrometry, remote sensing andgravimetry, for exploration of potash salt during the past more than 30 years. This paper shortly summarizes the achievements of our efforts dedicated to the research work in this field. The gammaspectrometrie well-logging method and bore-hole gammaspectrometer were proposed and developed by us in 1963, and several times updated up to the eighties. The gammaspectrometric well-logging has been applied in 6 provinces successfully. A bore-hole radioactivity-spectra interactive interpretation software system (HRSIS) was developed in 1995, which consists of 5 groups of functional programs: the preprocess, the quantitative interpretation, the trend analysis, the graphic display and the integrated interpretation. The high sensitivity airborne survey has been conducted since 1984 for investigating chiefly the evaporite-type potash deposits in the western China. 4 parameters are usually recorded: K, Th, U and magnetic field. The airborne multichannel gamma-spectra processing software package (AMGPSP) and the aerogeophysical image processing software package (AGIPSP) were developed in the eighties for preprocessing, spectra-stabilization and image processing of aero-gamma-spectra data. Since the middle eighties the digital image processing techniques have been used for integrated data interpretation, including geophysical and remote-sensed MSS & TM data, in studying the evaporite-type sylvinite-bearing basins in the west China. At the beginning of 1993 a very special software package for 3D imagery of gravitational field (3DIG) was developed by us. It constructs the 3D matrix.