<p>Samples from the Whitefish Falls Area were examined
petrographically and chemically to determine the regional
grade of metamorphism. Mineralogy from the Lorrain formation
(quartzities) and Gowganda Formation (argillites) were
apparently incongrous. The resolution of this problem formed
the major part of the study.</p>
<p>Mineralogically the quartzites contained a kyanitequartz
paragenesis with a subordinate kyanite-chloritoidquartz
paragenesis. The argillites showed a chlorite-biotite
-plagioclase-calcite-quartz paragenesis with only minor
epidote present. From textural evidence possible reactions
were deduced which were used to set the upper and lower limits
for pressure and temperature. These boundaries were 470°C
and 3.9 kb., lower limit and 550°C with a variable pressure
for the upper limit.</p>
Chemically, whole rock analysis was used to determine
the parameters for various chemographic diagrams. AFM, ACF
and AKF plots for the argillites showed a very restrictive
composition which excluded the almandine field and promoted
the biotite field. The bulk composition of the argillites
was cited as the main reason for the inhibition of high
grade index minerals, thus appearing to be lower grade than
their quartzite counterparts. AFM and AKF diagrams for the
quartzites verified their mineralogy and proved their high
grade nature. / Thesis / Bachelor of Science (BSc)
| Identifer | oai:union.ndltd.org:mcmaster.ca/oai:macsphere.mcmaster.ca:11375/15382 |
| Date | 04 1900 |
| Creators | Berger, Ben R. |
| Contributors | Schwarcz, H.P., Geology |
| Source Sets | McMaster University |
| Language | English |
| Detected Language | English |
| Type | Thesis |
Page generated in 0.0018 seconds