Syme, Eric C., Forester, Richard W. (1977) Petrogenesis of the Boundary intrusions in the Flin Flon area of Saskatchewan and Manitoba. Canadian Journal of Earth Sciences, 14 (3) 444-455 doi:10.1139/e77-044
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | Petrogenesis of the Boundary intrusions in the Flin Flon area of Saskatchewan and Manitoba | ||
| Journal | Canadian Journal of Earth Sciences | ||
| Authors | Syme, Eric C. | Author | |
| Forester, Richard W. | Author | ||
| Year | 1977 (March 1) | Volume | 14 |
| Issue | 3 | ||
| Publisher | Canadian Science Publishing | ||
| DOI | doi:10.1139/e77-044Search in ResearchGate | ||
| Generate Citation Formats | |||
| Mindat Ref. ID | 475261 | Long-form Identifier | mindat:1:5:475261:9 |
| GUID | 0 | ||
| Full Reference | Syme, Eric C., Forester, Richard W. (1977) Petrogenesis of the Boundary intrusions in the Flin Flon area of Saskatchewan and Manitoba. Canadian Journal of Earth Sciences, 14 (3) 444-455 doi:10.1139/e77-044 | ||
| Plain Text | Syme, Eric C., Forester, Richard W. (1977) Petrogenesis of the Boundary intrusions in the Flin Flon area of Saskatchewan and Manitoba. Canadian Journal of Earth Sciences, 14 (3) 444-455 doi:10.1139/e77-044 | ||
| In | (1977, March) Canadian Journal of Earth Sciences Vol. 14 (3) Canadian Science Publishing | ||
| Abstract/Notes | The Aphebian Boundary intrusions are a group of lensoid, ultramafic to felsic rocks which occur in a N–NW trending zone 10 km long by 4 km wide centred on the town of Flin Flon. The intrusions were emplaced into Amisk metavolcanic rocks and Missi metasedimentary rocks. Field relationships, petrography, and chemical characteristics of the Boundary intrusions indicate that they are composed of three compositionally distinct, sequentially emplaced groups. From oldest to youngest, these are (1) a mafic augite- and biotite-bearing mela-dioritic group, (2) a felsic group ranging from leucodiorite to granodiorite, and (3) an olivine-bearing (wehrlite to olivine gabbro) group. The mafic group crystallized at relatively high [Formula: see text] and [Formula: see text], such that successive differentiates have increasing MgO/FeO ratios. Molar ratio diagrams clearly indicate that fractionation of augite, minor magnetite, and possibly subordinate olivine can account for the observed chemical variation of approximately 80% of this group, whereas the olivine-bearing group could only have formed by crystal fractionation of subequal amounts of olivine and clinopyroxene, and minor magnetite. The felsic group is chemically similar to the post-Missi granodioritic plutons and cannot represent SiO2-rich residual liquids produced solely by fractionation of augite and olivine from a basaltic magma. | ||
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