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大兴安岭北部各砂金矿区积累了大量粒度分析资料,多年来这些资料仅停留在原始数据状态,没有应用于成矿研究方面。本文试图通过对这些粒度资料的分析研究,为含金沉积物的形成条件和搬运方式的研究提供点信息。 1.粒度组成 以往,在兴隆沟、达拉罕和富克山砂金矿普查勘探时,沉积物粒度分析样品皆采自浅井中。样品的采集是连续进行的。区内含金沉积物充填在现代河谷谷底,厚4—7m。由四层组成,自下而上为:1)碎石层,厚0.2—1.0m,为主要含金层;2)下砂砾层,厚
Large amounts of grain size analysis data have been accumulated in each gold deposit area in the northern part of Daxinganling Mountains. For many years these data only stayed in the original state of the data and were not used in metallogenetic research. This paper tries to provide some information for the research on the formation conditions and handling modes of gold-bearing sediment by analyzing and analyzing these granularity data. 1. Particle size composition In the past, Xinglonggou, Dalahan and Fushan sand gold exploration survey, the sediment particle size analysis samples were collected from shallow wells. Sample collection is continuous. Gold deposits in the area filled the valley in the modern valley, 4-7m thick. Consists of four layers, bottom-up as follows: 1) gravel layer, thickness 0.2-1.0m, as the main gold layer; 2) the lower gravel layer, thick