Hydrothermal alteration of the graphitized organic matter at the Kansanshi Cu (Au-,U-) deposit, Zambia

摘要: Hydrothermal alteration of greenschist facies metamorposed organic matter in host rocks the Kansanshi vein-type copper (Au-, U-) deposit produced 13C depleted amorphous carbon phase (pyrobitumen) and CO2≫CH4 volatile phase. Compared with graphitized non-altered rocks, FTIR spectra altered rock display significant increase C=O C=C vibrations, C-H deformation vibrations C-O ethers. Depletion hydrothermal carbonates indicates that interaction between fluids was a major source fluids. A large volume bleached carbonaceous schists at suggests decomposition to great extend controlled redox state ore