<P> The Faymar Gold Property, near Timmins Ontario,
is cross-cut by two quartz-carbonate veins. Isotopic
measurements of carbon species in fluid inclusions
in these quartz-carbonate veins, reveal the presence
of CO2 and other light carbon species (eg. CH4). The
inclusion contents were liberated using thermal
decrepitation. The results obtained are found to vary
quite significantly with various periods and temperatures
of heating. The most useful results were
obtained from samples heated for 5 minutes at 550 °C.
The short heating period reduces fractionation and
reaction effects. Mass spectrometer measurements
of the carbon isotopes reveal that the CO2 and total
carbon in the inclusions are characterized by a
δ13c of -3.O and -4.7 respectively. A magmatic
source for the fluids most easily explains these
values. Petrographic observations indicate that
secondary inclusions dominate. Thus, the isotopic
measurements are of fluids which post-date the
deposition of the quartz-carbonate or at least
represent a late stage of this process. Since the
mineralization in the veins also appears to be
secondary to the quartz-carbonate (ie. in fractures),
it is possible that the carbon species in the inclusions
are distinct of the mineralizing fluids. </p> / Thesis / Bachelor of Science (BSc)
| Identifer | oai:union.ndltd.org:mcmaster.ca/oai:macsphere.mcmaster.ca:11375/19223 |
| Date | 04 1900 |
| Creators | Bodrin, Dominico |
| Contributors | Schwarcz, H. P., Geology |
| Source Sets | McMaster University |
| Language | English |
| Detected Language | English |
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