水系沉积物测量的两个问题  

TWO ISSUES ON STREAM SEDIMENT SURVEY

作　　者：熊小龙 闫李军 XIONG Xiao-long;YAN Li-jun(School of Resources and Environmental Engineering,Hefei University of Technology,Hefei,Anhui 230009,China)

机构地区：[1]合肥工业大学资源与环境工程学院,安徽合肥230009

出　　处：《安徽地质》2021年第4期365-368,共4页Geology of Anhui

基　　金：中国地质调查局“安徽铜陵大通镇-木镇地区矿产远景调查”(编号:1212011085431)资助。

摘　　要：本文针对1∶50000水系沉积物测量的特点提出两个改进方法,用流域法布点,用色斑图表达测量结果。流域法根据水系流域的实际情况布点,不受网格限制。流域法布点在减少漏控区、减轻采样难度两个方面好于现行的网格法布点。色斑图是在实际采样点位图中绘出每个采样点的控制流域,根据采样点的元素含量值给控制流域赋颜色,以此表示元素含量的分布状况。与等值线图相比,色斑图的异常区直接对应采样点,直接指示矿化岩石的位置,表达更直观;色斑图不进行插值计算,直接使用测量数据成图,漏控区如实地表示为空白,表达更客观。Based on the characteristics of 1:50000 stream sediment survey,two improved methods were proposed in this paper.The drainage basin method was used for design of point locations and the measurement results were expressed by choroplethic map.This method is based on the actual situation of the drainage basin and is not limited by the grid.It is better than the current grid method in reducing the leakage of control area and reducing sampling difficulty.Choroplethic map is to draw the area of drainage controlled by each sampling point in the actual sampling point locations map,and assign color to the controlled area according to the element content value of the sampling point,so as to represent the distribution of element content.Compared with the contour map,the abnormal area of the choroplethic map directly corresponds to the sampling point,which directly indicates the location of the mineralized rock and makes the expression more intuitive.No interpolation calculation is carried out for the choroplethic map,and the measured data is directly used to make the map.The leakage of control area is honestly expressed as blank,and the expression is more objective.

关 键 词：水系沉积物测量 网格法布点 流域法布点 地球化学图 色斑图 

分 类 号：P592[天文地球—地球化学]