Advertisement
Published in:
2005 | OriginalPaper | Chapter
Hydrothermal alteration of the graphitized organic matter at the Kansanshi Cu (Au-,U-) deposit, Zambia
Authors : B. Kríbek, I. Kneésl, J. Pasava, K. Malý, H. Caruthers, I. Sykorová, J. Jehlicka
Published in: Mineral Deposit Research: Meeting the Global Challenge
Publisher: Springer Berlin Heidelberg
Activate our intelligent search to find suitable subject content or patents.
Select sections of text to find matching patents with Artificial Intelligence. powered by
Select sections of text to find additional relevant content using AI-assisted search. powered by
Hydrothermal alteration of greenschist facies metamorposed organic matter in host rocks of the Kansanshi vein-type copper (Au-, U-) deposit produced
13
C depleted amorphous carbon phase (pyrobitumen) and CO
2
≫CH
4
volatile phase. Compared with graphitized organic matter in non-altered rocks, FTIR spectra of amorphous carbon phase in altered rock display significant increase of C=O and C=C vibrations, C-H deformation vibrations and C-O vibrations of ethers. Depletion of hydrothermal carbonates with
13
C indicates that the interaction between graphitized organic matter and hydrothermal fluids was a major source of carbon in the fluids. A large volume of bleached carbonaceous schists at the Kansanshi deposit suggests that the hydrothermal decomposition of graphitized organic matter to a great extend controlled the redox state of the ore fluids.