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一、引言通常,地球物理方法用来探测由于矿藏引起的围岩物性的明显变化。由于金的储存量通常较小,它的存在不影响周围岩体的物性,因此,在对这种金属的直接探测中地球物理方法不能被广泛地应用。不过,这种技术一直用来圈定有利于金矿成矿的伴生蚀变地带及其构造特征。一般来说,地球物理测井技术的应用应该考虑到不同岩石类型在测井特性上的急剧变化,还应考虑根据金矿存在的可能性对这些地区划分成若干带并进行描述。测井技术的选择以地质特征为基础,正如过去在所调查地区的勘探工作所观测到的那样,地质特征与成矿作用的演化和空间位置有关。
I. INTRODUCTION Geophysical methods are often used to detect significant changes in the physical properties of a surrounding rock due to a mineral deposit. Because of the generally small reserves of gold, its existence does not affect the physical properties of the surrounding rock mass. Therefore, geophysical methods can not be widely used in the direct detection of such metals. However, this technique has been used to delineate associated alteration zones and their tectonic features that favor gold mineralization. In general, the application of geophysical logging techniques should take into account the sharp changes in well logging characteristics of different rock types. It is also considered that these areas should be divided into zones according to the possibility of gold deposits and described. The selection of logging technology is based on geological features that, as was previously observed in the exploration work in the area surveyed, are related to the evolution and spatial location of metallogenesis.