| Reference Type | Journal (article/letter/editorial) |
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| Title | Anorthosite and associated plutons, southern Nain complex, Labrador |
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| Journal | Canadian Journal of Earth Sciences |
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| Authors | Wiebe, Robert A. | Author |
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| Year | 1978 (August 1) | Volume | 15 |
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| Issue | 8 |
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| Publisher | Canadian Science Publishing |
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| DOI | doi:10.1139/e78-138Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 475970 | Long-form Identifier | mindat:1:5:475970:0 |
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| GUID | 0 |
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| Full Reference | Wiebe, Robert A. (1978) Anorthosite and associated plutons, southern Nain complex, Labrador. Canadian Journal of Earth Sciences, 15 (8) 1326-1340 doi:10.1139/e78-138 |
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| Plain Text | Wiebe, Robert A. (1978) Anorthosite and associated plutons, southern Nain complex, Labrador. Canadian Journal of Earth Sciences, 15 (8) 1326-1340 doi:10.1139/e78-138 |
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| In | (1978, August) Canadian Journal of Earth Sciences Vol. 15 (8) Canadian Science Publishing |
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| Abstract/Notes | Plutonic rocks in a southern area of the Nain anorthosite complex consist of leuconorite, anorthosite, granite, and subordinate diorite. An older anorthosite intrusion (CI < 10) has been invaded and broken up by an extensive leuconorite intrusion (CI = 15). Ferrodiorite occurs as small bodies within or adjacent to the leuconorite and is a late stage differentiate of leuconorite, Large granitic plutons of separate crustal origin were emplaced prior to complete solidification of the leuconorite. Where these intrusions invaded leuconorite a marginal hybrid (diorite–granite) zone of heterogeneous matrix developed with chilled pillows of residual magma (mainly ferrodiorite) filter-pressed from the leuconorite. Chilled leuconorite dikes indicate that the parent magma of one leuconorite intrusion was approximately equivalent to its average composition. The older anorthosite body most probably represents a concentration of plagioclase crystals from a different magma; deformation of plagioclase crystals suggest that the mechanism of concentration was filter pressing. |
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