西秦岭土壤和岩石光谱在风化作用中的演化

Evolution of Soil and Rock Spectrum Under the Weathering in the Western Qinling Area

岩石与土壤的物质成分，以及反映物质成分的光谱特征，无疑存在着重要的依存关系。对西秦岭地区土壤及其母岩在０．４～２．５μｍ的实验室反射光谱进行分析，探讨了母岩在风化成壤过程中光谱特征的演化；不同成壤阶段，不同土壤层光谱的变异，以及有机质及铁氧化矿物成分增减对光谱的影响。了解这种光谱的演化过程，对于遥感岩性识别和遥感地质找矿应用，都具有重要的意义。

It is undoubted there are some interdependent relationships between rock and soil,on either their compositions or spectrum.The paper analysis lab.reflectance spectrum(0.4～ 2.5μm ) of soils and their parent rocks from the Western Qinling area.In the respects of spectral evolution of parent rocks and soils,during different weathering period and between different soil layers,also the effect of organic and ferric oxide matter to spectrum are discussed.It is important for remote sensing to identify the underlying rock and alteration,through spectrum of their soils.