弓长岭富铁矿围岩反射光谱特征及其指示意义浅析

Research on Reflectance Spectroscopy of Wall Rocks in Gongchangling Iron Deposit and Their Significance for Exploration

摘要: 弓长岭铁矿内产出的富铁矿体是我国为数不多的、可工业利用的富铁资源之一，富铁矿体周围发育有强烈的绿泥石化蚀变。本文采用ASD FieldSpec 3地物光谱仪对距富铁矿体不同位置蚀变围岩进行反射光谱测量，并提取2250 nm和2340 nm处光谱吸收特征，结果表明上述光谱吸收特征可以很好地表征富铁矿体围岩的蚀变强度。该研究对今后本区富铁矿的勘查具有一定的指导意义。

Abstract: The rich ore bodies occurred in Gongchangling iron deposit are the few industrial rich iron re-sources in China, and there are strong chloritization around the rich ore bodies. The reflectance spectroscopy of wall-rocks was measured by ASD Fieldpec3 and the characteristic features at wa-velength around 2250 nm and 2340 nm were extracted. The results indicate that the spectroscopic absorption features are well in accordance with wall-rock alteration intensity, which is helpful to the further exploration of rich iron ore.