<p> A gabbroic intrusion within the Wabigoon Greenstone Belt,
southeast of Dryden Ontario, was studied and mapped. Petrographic
examination of the sill was carried out and geochemical whole rock
data was obtained using X.R.F. methods. </p> The Gabbro Lake Sill was injected into a mafic pile and
subsequently underwent fractional crystallization and differentiation.
The sill exhibits good phase layering resulting in its division
into six basic units: Chilled Margin Gabbro
Diabasic Gabbro
Leucocratic Gabbro
Pyroxenitic Gabbro
Pegmatitic Gabbro
Sheared Gabbro </p> <p> These units are evident in thin section and are distinguishable
both modally and textUrally. In most cases, variations in the
chemistry and norms reflect the units mapped in the field. </p> <p> Many features of the sill are analogous to other intrusions,
and comparisons have been drawn and theories incorporated to explain
these features in the Gabbro Lake Sill. </p> / Thesis / Bachelor of Science (BSc)
| Identifer | oai:union.ndltd.org:mcmaster.ca/oai:macsphere.mcmaster.ca:11375/19833 |
| Date | 04 1900 |
| Creators | McMaster, Glenn |
| Contributors | McNutt, R. H., Geology |
| Source Sets | McMaster University |
| Language | English |
| Detected Language | English |
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