Li, Gang, Pe-Piper, Georgia, Piper, David J.W. (2012) The provenance of Middle Jurassic sandstones in the Scotian Basin: petrographic evidence of passive margin tectonics 1This article is one of a series of papers published in this CJES Special Issue on the theme of Mesozoic–Cenozoic geology of the Scotian Basin. 2Geological Survey of Canada Contribution 20110319. Canadian Journal of Earth Sciences, 49 (12) 1463-1477 doi:10.1139/e2012-061
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | The provenance of Middle Jurassic sandstones in the Scotian Basin: petrographic evidence of passive margin tectonics 1This article is one of a series of papers published in this CJES Special Issue on the theme of Mesozoic–Cenozoic geology of the Scotian Basin. 2Geological Survey of Canada Contribution 20110319. | ||
| Journal | Canadian Journal of Earth Sciences | ||
| Authors | Li, Gang | Author | |
| Pe-Piper, Georgia | Author | ||
| Piper, David J.W. | Author | ||
| Year | 2012 (December) | Volume | 49 |
| Issue | 12 | ||
| Publisher | Canadian Science Publishing | ||
| DOI | doi:10.1139/e2012-061Search in ResearchGate | ||
| Generate Citation Formats | |||
| Mindat Ref. ID | 484792 | Long-form Identifier | mindat:1:5:484792:6 |
| GUID | 0 | ||
| Full Reference | Li, Gang, Pe-Piper, Georgia, Piper, David J.W. (2012) The provenance of Middle Jurassic sandstones in the Scotian Basin: petrographic evidence of passive margin tectonics 1This article is one of a series of papers published in this CJES Special Issue on the theme of Mesozoic–Cenozoic geology of the Scotian Basin. 2Geological Survey of Canada Contribution 20110319. Canadian Journal of Earth Sciences, 49 (12) 1463-1477 doi:10.1139/e2012-061 | ||
| Plain Text | Li, Gang, Pe-Piper, Georgia, Piper, David J.W. (2012) The provenance of Middle Jurassic sandstones in the Scotian Basin: petrographic evidence of passive margin tectonics 1This article is one of a series of papers published in this CJES Special Issue on the theme of Mesozoic–Cenozoic geology of the Scotian Basin. 2Geological Survey of Canada Contribution 20110319. Canadian Journal of Earth Sciences, 49 (12) 1463-1477 doi:10.1139/e2012-061 | ||
| In | (2012, December) Canadian Journal of Earth Sciences Vol. 49 (12) Canadian Science Publishing | ||
| Abstract/Notes | The tectonic and geomorphological evolution of the Scotian margin and its hinterland is poorly known between Late Triassic rifting and the Early Cretaceous progradation of major deltas. This study determined sedimentary provenance of Middle Jurassic Mohican Formation sandstones from three wells using heavy minerals and mineral chemistry. Indicator minerals such as xenotime, altered ilmenite, and varietal types of garnet and tourmaline are similar to those in Hauterivian–Barremian sandstones in the western Scotian Basin, which are almost exclusively derived from the Meguma terrane. The wells adjacent to the Canso Ridge have more zircon and less ilmenite, indicating a greater contribution of polycyclic reworking, but with an ultimate source in the Meguma terrane. Zircon and ilmenite were likely derived in part from Carboniferous sandstones in eastern mainland Nova Scotia and Cape Breton Island. Any river drainage from the inboard terranes of the Appalachians either was diverted through the Fundy Basin or entered the easternmost Scotian Basin, where the Mohican Formation is 5.5 km thick, along the linear continuation of the southwest Grand Banks transform. Such sediment did not reach the Canso Ridge, suggesting that the Cobequid–Chedabucto fault zone in Orpheus graben was not a significant physiographic feature. This tectonically controlled paleogeography in the Middle Jurassic is quite different from that during active rifting in the Late Triassic – Early Jurassic. Middle Jurassic quiescence was followed in the Tithonian – Early Cretaceous by renewed tectonic uplift associated with rifting of Grand Banks from Iberia and Labrador from Greenland. | ||
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