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在森林沼泽水系较不发育区开展土壤测量时,部分区段存在厚度为1~3 m的黏土层,采样困难,大家选用采样介质不一。通过对比研究残积土、腐殖土、黏土的粒级分布特征、元素分布特征及同点采集的样品元素含量的对比研究,认为在大兴安岭中北段森林沼泽丘陵景观区开展1∶5万化探时采用的方法为:采样介质为残坡积土;采样粒级为-10~+60目;采样密度为9点/km~2;野外样品加工方法为水筛。
When carrying out soil measurement in less developed areas of forest and swampy water system, some clay layers with thickness of 1 ~ 3 m exist in some sections and sampling is difficult. We choose different sampling media. By comparing the grain-size distribution characteristics, elemental distribution characteristics and the elemental concentrations of the samples collected from the same area with the comparative study of residual soil, humus soil and clay, it is considered that when 1: 50000 geochemical exploration is carried out in the forest marsh hilly landscape area in the middle and northern section of the Daxinganling Mountains The method used is as follows: the sampling medium is residual soil fill; the sample size is -10 ~ + 60 mesh; the sampling density is 9 points / km ~ 2; and the field sample processing method is water sieve.