西昆仑东段1∶5万水系沉积物测量粒度试验

Granularity test in 1 ∶ 50 000 scale stream sediment survey in the eastern part of western Kunlun area

为了更好地在西昆仑和田东三县一带开展1∶5万水系沉积物测量工作,并使其取得明显的找矿效果,课题组在塔木其铜锌矿点附近选择一条剖面做了粒度试验工作。通过采样路线选择、步长确定、水系沉积物介质采集、样品预处理、5个粒级过筛、样品分析、结果研究等方法完成了该项试验工作。结果显示,-4^+20目的水系沉积物粒级更能反映该区的找矿信息。因此,以后在西昆仑地区开展水系沉积物测量工作时将-4^+20目的水系介质作为采样的首选粒级。

In order to conduct the 1 ： 50 000 stream sediment survey effectively in the eastern part of western Kunlun area and obtain the good prospecting result, the granularity test was conducted near Tamuqi copper zinc mineral occurrence by selecting a section profile. The test was completed by sampling route selection, sampling distance determination, stream sediment medium collection, sam- ple pretreatment, five particle size sieving, sample analysis, results statistics etc.. Results show that stream sediment granularity be- tween -4 to ＋20 mesh can provide effective prospecting information in this area. Therefore, it is recommended that stream sediment with granularity medium from -4 mesh to ＋20 mesh is the first choice for stream sediment survey in the eastern part of western Kunlun area.