数字地质填图系统的几点改进意见及实用技巧

本文简要介绍了数字地质填图系统的功能及其优点,该系统功能齐全,实用性强。在实际应用过程中,笔者也发现了该系统存在的一些不足:在实测地层剖面过程中,由于方位角、坡度角和坡长的测量存在误差,随着剖面的增长,误差逐渐积累,最终导致剖面终点有时偏离实际终点比较远;在有放射性矿产远景区测量剖面时,需要进行能谱测量,而在数字剖面系统中无法将能谱数据直接融入系统中;在数字剖面系统中,地层厚度计算未考虑特殊剖面的岩层厚度计算问题,例如剖面由于地形、建筑物等影响,出现部分回测现象时,在数字剖面系统中回测部分地层厚度会重复累加;在数字地质罗盘中测量的产状需在平板机中进行数据转换,不能直接显示所测的产状,这样就大大限制了数字地质罗盘的推广使用。文中对上述问题的解决办法进行了详细阐述,并结合野外和室内工作体会,对数字地质填图系统的应用给出了一些简单实用的小技巧。

Some suggestions for the improvement of the regional geological mapping system and practical skills

The Regional Geological Mapping System,well operated in terms of its function and utilization,was briefly discussed in this paper.The authors found in its application that this system has some shortcomings.first,in the process of measuring the regional geological section,the increasing inaccuracy due to the increasing length of the section will finally lead to the remarkable deviation of the end of the section from its actual one because of the inaccuracy in measuring the azimuth angle,grading angle and slope length.Second,before the measurement of the section in a radioactive ore district,we need to measure the γ-ray spectrometry,but the resultant data can’t be involved in the Regional Geological Mapping System.Third,the stratigraphic thickness of the special section will not be included in the calculation of the thickness of the strata in the Regional Geological Mapping System(RGSETION).For example,it’s probable that some lines go backward while most of them continue going in their original direction.If this really happens,the thickness of the strata of these lines that go backward will be calculated again.Fourth,the attitude measured by the digital geological compass should be transformed in the tablet,but the use of the digital geological compass will be greatly limited because it can’t directly display the attitude measured by it itself.For solving these problems,the authors put forward some suggestions in this paper.In combination with the experience obtained in the field and indoor work concering the utilization of the Regional Geological Mapping System,the authors also illustrate some practical skills in this paper.