This paper researches the geochemical and spectral information related to the "Red-fading"

"Clay-mineralization" and "Carbonization" induced hydrocarbon micro-seepage in Jianghan Basin.Three content factors are extracted on the basis of researching the soil composition; three TM band reflectance ratio factors are extracted on the basis of researching the soil spectral characteristics

and the hydrocarbon microseepage alteration information are extracted successfully in laboratory from the soil spectral data.