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The origin and hydrothermal mobilization of carbonaceous matter associated with Paleoproterozoic orogenic-type gold deposits of West Africa
- 1.0451099 - ÚSMH 2016 RIV NL eng J - Journal Article
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
Institutional support: RVO:67985891
Keywords : carbonaceous matter * gold deposits * graphite
Subject RIV: DB - Geology ; Mineralogy
Impact factor: 4.037, year: 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.
Permanent Link: http://hdl.handle.net/11104/0252504
Number of the records: 1