可见～近红外波段矿物和岩石光谱特征——以新疆北疆部分地区岩石为例

MINERAL AND ROCK SPECTRAL FEATURES FROM VISIBLE TO INFRARED BANDS IN THE NORTHERN PART OF XINJIANG

分析新疆北疆部分地区若干种矿物、岩石在可见～近红外波段内光谱曲线,结合其化学成份、矿物成份、结构构造等特点,总结了0.4μm～2.4μm间火成岩、变质岩的光谱变化特征,并从其化学成份上对这些变化特征予以分析,得出火成岩光谱特征与化学成份相关、变质岩光谱特征与母岩关系密切的结论。

It is well known that each kind of minerals is consisted with different chemical elements, and each type of rocks is composed of several minerala also. The characteristics mentioned above are given the spectral features as absorbance and reflectance of geobodies. That is why we often study the spectral features of mineral and rock in detail with chemical composition and mineral composition.It is showen not only the spectral features of igneous rocks and metamorphic rock, but also the influencn fron chemical composition and mineral composition based on analyzing reflectance diagrams between 0.4—2.4μm. The diagrams of sample were collected from northern part of xinjiang.The varieties of reflectance in the series of igneous rock are followed:Ultrabasic magma<basic magma<intemedate magma<acidic magma. It is as the same order as litholosical classification system based on chemical composition. The spectral features of metamorphic rock are concerted with the original rock.