"Hydrothermal alteration and fluid inclusion geochemistry of auriferous" by Bulent. Bas

Date of Award

1992

Publication Type

Master Thesis

Degree Name

M.Sc.

Department

Civil and Environmental Engineering

Keywords

Geology.

Supervisor

Samson, Iain M.,

Rights

info:eu-repo/semantics/openAccess

Abstract

Three stages of hydrothermal alteration have been identified at Wawa: (1) an early, pre- to syn-deformation alteration, represented by quartz-chlorite-Fe-dolomite-muscovite schists and chlorite-Fe-dolomite $\pm$ biotite schists (developed in felsic and mafic protoliths, respectively); (2) fenitization (biotite and riebeckite alteration) related to carbonatite-lamprophyre intrusives; and (3) late, fracture-related ankeritic and nematitic alteration. Events 1 and 3 are related to vein sets 1 and 3, respectively. Three generations of fluids have been recognized from fluid inclusion studies. The first fluid is an immiscible mixture of (1) high-salinity (18-23 wt. % NaCl), aqueous fluids, (2) low-salinity (4 to 7 wt. % NaCl), aqueous-carbonic fluids (XCO$\sb2\leq$ 20), and (3) CO$\sb2$-CH$\sb4$-N$\sb2$ fluids. This fluid is restricted to vein set 1 in the Surluga Mine and may have caused the early alteration in the Jubilee shear zone. The second fluid is a low- to moderate-salinity (5 to 16 Wt. % NaCl), aqueous fluid which may contain up to 10 mole % CO$\sb2$. The third fluid is a low-salinity (2 to 10 equiv. Wt. % NaCl) aqueous-carbonic fluid with significant amounts of CO$\sb2$ (XCO$\sb2$ = 0.23-0.35). (Abstract shortened by UMI.)Dept. of Geology and Geological Engineering. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis1992 .B383. Source: Masters Abstracts International, Volume: 31-03, page: 1171. Supervisor: Iain M. Samson. Thesis (M.Sc.)--University of Windsor (Canada), 1992.

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