The origin and hydrothermal mobilization of carbonaceous matter associated with Paleoproterozoic orogenic-type gold deposits of West Africa

0451099 - ÚSMH 2016 RIV NL eng J - Článek v odborném periodiku
Kříbek, B. - Sýkorová, Ivana - Machovič, V. - Knésl, I. - Laufek, F. - Zachariáš, J.
The origin and hydrothermal mobilization of carbonaceous matter associated with Paleoproterozoic orogenic-type gold deposits of West Africa.
Precambrian Research. Roč. 270, November 01 (2015), s. 300-317. ISSN 0301-9268. E-ISSN 1872-7433
Institucionální podpora: RVO:67985891
Klíčová slova: carbonaceous matter * gold deposits * graphite
Kód oboru RIV: DB - Geologie a mineralogie
Impakt faktor: 4.037, rok: 2015

Two types of carbonaceous matter (CM) are present at all studied deposits: metamorphosed and hydrothermal. Hydrothermal CM is commonly associated with gold mineralization. It forms veinlets in hydrothermally altered rocks and quartz veins, or irregular accumulations parallel or subparallel to C-type cleavage within shear zones. The isotopic composition of carbon in metamorphosed as well as hydrothermal CM (-26.2 to -33.1>; PDB) indicates their biogenic origin. Optical properties, XRD and Raman spectra of metamorphosed and hydrothermal CM within a single deposit are similar.
Trvalý link: http://hdl.handle.net/11104/0252504