安徽北淮阳典型矿区水系沉积物采样方法

通过在安徽省北淮阳地区开展水系沉积物测量采样方法技术试验研究,选择两种粒级样品在典型矿区开展了1∶5万化探普查试验,发现元素浓集中心与各矿床空间位置吻合较好。结果表明,采集10~60目的沟谷粗粒级样品,能够圈定出清晰的矿化异常,指示意义明确;提出在北淮阳地区开展水系沉积物测量适宜采用截取粒级的采样方法,从而为该地区开展1∶5万化探普查提供了技术依据。

Research on sampling methods for stream sediments survey in the typical ore district of northern Huaiyang area in Anhui Province

This paper puts forward the suitable sampling particle size for the stream sediments survey in the study area through the test of survey method of stream sediments in northern Huaiyang area. 1∶50 000 geochemical survey experiment was carried out in the typical ore district by choosing the sample granularity of two kinds of mesh, and the results indicate that the concentration centers of elements coincide with the ore blocks in the ore district. The test results have shown that taking samples of 10~60 mesh coarse fragment media from the surface of valley within each 1 000 m2 can clearly determine the mineralization anomaly and correctly reflect the shape of the orebody. This result validates the feasibility of sampling granularity and provides guidance for geochemical survey in northern Huaiyang area.