Doig, Ronald, Murphy, J. Brendan, Nance, R. Damian (1993) Tectonic significance of the Late Proterozoic Economy River gneiss, Cobequid Highlands, Avalon Composite Terrane, Nova Scotia. Canadian Journal of Earth Sciences, 30 (3) 474-479 doi:10.1139/e93-035
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | Tectonic significance of the Late Proterozoic Economy River gneiss, Cobequid Highlands, Avalon Composite Terrane, Nova Scotia | ||
| Journal | Canadian Journal of Earth Sciences | ||
| Authors | Doig, Ronald | Author | |
| Murphy, J. Brendan | Author | ||
| Nance, R. Damian | Author | ||
| Year | 1993 (March 1) | Volume | 30 |
| Issue | 3 | ||
| Publisher | Canadian Science Publishing | ||
| DOI | doi:10.1139/e93-035Search in ResearchGate | ||
| Generate Citation Formats | |||
| Mindat Ref. ID | 482064 | Long-form Identifier | mindat:1:5:482064:6 |
| GUID | 0 | ||
| Full Reference | Doig, Ronald, Murphy, J. Brendan, Nance, R. Damian (1993) Tectonic significance of the Late Proterozoic Economy River gneiss, Cobequid Highlands, Avalon Composite Terrane, Nova Scotia. Canadian Journal of Earth Sciences, 30 (3) 474-479 doi:10.1139/e93-035 | ||
| Plain Text | Doig, Ronald, Murphy, J. Brendan, Nance, R. Damian (1993) Tectonic significance of the Late Proterozoic Economy River gneiss, Cobequid Highlands, Avalon Composite Terrane, Nova Scotia. Canadian Journal of Earth Sciences, 30 (3) 474-479 doi:10.1139/e93-035 | ||
| In | (1993, March) Canadian Journal of Earth Sciences Vol. 30 (3) Canadian Science Publishing | ||
| Abstract/Notes | A 734 ± 2 Ma U–Pb (zircon) age for the Economy River orthogneiss, Coboquid Highlands, Nova Scotia, is interpreted as being representative of a regionally extensive ca. 820–660 Ma event that is recorded in many parts of the Late Proterozoic – Early Cambrian Avalon Composite Terrane and the Gondwanan margin. The geochemistry of the gneiss is consistent with an arc environment. Although the gneiss may represent part of the sialic basement to the terrane, field relationships indicate that some of the basement is significantly older. The date may provide a minimum age for the platformal sedimentary rocks (Gamble Brook Formation) that the orthogneiss intruded and thus help constrain the Late Proterozoic paleogeographic position of Avalon relative to Gondwanaland. | ||
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