贵州西部峨眉山玄武岩的遥感影像特征

Essentials of Remote Sensing Images of Emeishan Basalts, West Guizhou

贵州西部峨眉山玄武岩无论是在航天影像(TM)上,还是全色航空相片上,均有较高的可识别性。航天影像上,因其空间分辨率低,主要依据成因地貌类别和色调差异识别,且色调是判别玄武岩的重要影像标志,造成玄武岩及其上下岩组色调不同的根本原因是岩组的地下水类型、含水性不同;航空影像上,可据微地貌特征进行辨识,且通常情况下可划分到段。在不同的地貌分区、不同的构造部位、不同岩层倾角玄武岩的遥感影像有差异。

Lied in the west of Guizhou, the Emeishan basalts do appear to the high distinguishability both on the TM images and panchromatic aerophotos. Of the TM images the identification are mostly in accordance with origin, geomorphic types and tonal diversity due to the lower spacial resolution and the tonal diversity is a considerable image indication, fundamentally these differences in petrofabric underground water types and hydrous quality give rise to various tonal of basalts and its up-and-down hydrofabric; of TM photos the identification is based upon the mircogeomorphy, commonly up to the section in classification. The RS maps take on differentiations with the basalts from various landform divisions, structural segments and stratigraphic dip angle.