CAJ | 학술논문

内蒙古区域化探扫面采用水系沉积物测量(或土壤测量),取粗粒级样品,取得了较好的地质找矿效果,但局部景观区找矿效果受到了一些影响.我国南北方水系沉积物中元素含量呈"U"形分布,反映了南北方不同的风化类型,以及所取不同粒级样品的物质成分也不同;取粗粒级和细粒级样品均可能有化探异常显示,采用-5～+20目(0.9 mm≤A＜4 mm)和-120目(A＜-0.125 mm)组合粒级作为采样粒级.为提高工效,取样时可以采用-5目(或-20目)全粒级物质,也能获取更多的找矿信息.这种取样粒级技术,也适宜于全国各种不同的景观区的不同尺度的水系沉积物测量和土壤测量的化探工作.
내몽고구역화탐소면채용수계침적물측량(혹토양측량),취조립급양품,취득료교호적지질조광효과,단국부경관구조광효과수도료일사영향.아국남북방수계침적물중원소함량정"U"형분포,반영료남북방불동적풍화류형,이급소취불동립급양품적물질성분야불동;취조립급화세립급양품균가능유화탐이상현시,채용-5～+20목(0.9 mm≤A＜4 mm)화-120목(A＜-0.125 mm)조합립급작위채양립급.위제고공효,취양시가이채용-5목(혹-20목)전립급물질,야능획취경다적조광신식.저충취양립급기술,야괄의우전국각충불동적경관구적불동척도적수계침적물측량화토양측량적화탐공작.
Stream sediment survey or soil survey was adopted during the 1∶200 000 regional geochemical exploration in Inner Mongolia. The coarse sampling grade has performed well in the geological mineral resource prospecting. However, the prospecting is to some extent affected by local landscape. Geochemical elements in stream sediments from southern China are distributed in a "U"-shaped pattern, which indicates the difference in weathering types and correspondingly the difference in sedimentary materials between northern and southern China. Both the coarse and the fine grade samples can probably reflect the anomalies, and therefore the -5～+20 meshes(-4～+0.9 mm)and the -120 meshes (-0.125 mm) samples should be adopted during exploration. For improving the working efficiency, even the -5 meshes (or -20 meshes) whole grade grains can be adopted. In this way, more exploration information can be acquired. This key sampling technology can also be applied to stream sediment survey or soil survey of different scales for various landscapes in China.