| Reference Type | Journal (article/letter/editorial) |
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| Title | Geology and geochemistry of the St. Lawrence peralkaline granite and associated fluorite deposits, southeast Newfoundland |
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| Journal | Canadian Journal of Earth Sciences |
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| Authors | Teng, H. C. | Author |
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| Strong, D. F. | Author |
| Year | 1976 (October 1) | Volume | 13 |
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| Issue | 10 |
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| Publisher | Canadian Science Publishing |
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| DOI | doi:10.1139/e76-142Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 474686 | Long-form Identifier | mindat:1:5:474686:1 |
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| GUID | 0 |
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| Full Reference | Teng, H. C., Strong, D. F. (1976) Geology and geochemistry of the St. Lawrence peralkaline granite and associated fluorite deposits, southeast Newfoundland. Canadian Journal of Earth Sciences, 13 (10) 1374-1385 doi:10.1139/e76-142 |
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| Plain Text | Teng, H. C., Strong, D. F. (1976) Geology and geochemistry of the St. Lawrence peralkaline granite and associated fluorite deposits, southeast Newfoundland. Canadian Journal of Earth Sciences, 13 (10) 1374-1385 doi:10.1139/e76-142 |
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| In | (1976, October) Canadian Journal of Earth Sciences Vol. 13 (10) Canadian Science Publishing |
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| Abstract/Notes | The southern part of the Burin Peninsula of southeast Newfoundland is marked by extensive Carboniferous granite magmatism, intruding Late Precambrian to Middle Cambrian volcanic and sedimentary rocks. The St. Lawrence pluton, representative of this Carboniferous magmatism, ranges from equigranular to porphyritic in texture, displays much evidence of gas brecciation, and contains no pegmatites or schlieren, all features of high-level intrusion. The bulk chemistry corresponds to cotectic compositions in the synthetic Q–Ab–Or–H2O system for 500 bar [Formula: see text], likewise suggesting shallow levels of intrusion and crystallization. The granite is alkaline to peralkaline and of commenditic affinity, with agpaitic indices around 1 and modal aegirine and riebeckite. Its chemical affinity with less silicic alkaline granites of the same age in southeast Newfoundland suggests an origin by differentiation of such granites. A high initial Sr87/Sr86 ratio of 0.722 suggests substantial interaction with or derivation from continental crust. The St. Lawrence fluorite deposits occur as veins confined to and derived from the granite during the final stages of cooling. |
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