Use and Calibration of portable X-Ray fluorescence analysers:case studies from komatiite-hosted nickel-sulphide deposits of the Yilgarn Craton,Western Australia
Portable X-Ray Fluorescence (pXRF) analysers represent very powerful tools for the exploration and mining industry.This simple,inexpensive and fast way of analysing cuttings and drill core has become widely used.However,it is essential to consider whether the precision and the accuracy of the method are sufficient for specific applications.The aim of our project is the definition of geochemical haloes,which demands a quality of data higher than that for simple rock-type identification or delineation of ore grade shells.Consequently,we have developed a strict standardisation process,as well as important data quality checks,which are part of a study focusing on the use of pXRF to underline subtle changes in selected metal contents around magmatic nickel sulphide systems.Twenty-eight standards,representing a range of rock types have been used to determine calibration curves for the following elements: Si,Fe,Ti,Ca,S,Mn,Cr,K,Co,Zn,Cu,Ni,Sr,As,Sn and Zr.We obtained particularly good results for Si,Ti,Ca,Fe,S,Ni,Cr and Sr.These results validate the use of pXRF in determining element ratios such as Ni/Cr and Ni/Ti that have application as vectors to ore.These outcomes are of interest to explorers for magmatic nickel-sulphides.
M.Le Vaillant M.L.Fiorentini L.Fisher S.J.Barnes S.Caruso
Centre for Exploration Targeting,University of Western Australia,Perth,Western Australia CSIRO / Earth Science and Resource Engineering,Kensington,Perth,Western Australia Dipartimento di Scienze della Terra ‘A.Desio,Università degli Studi di Milano,Italy
国际会议
贵阳
英文
50-53
2012-06-16（万方平台首次上网日期，不代表论文的发表时间）