The provenance of Middle Jurassic sandstones in the Scotian Basin: petrographic evidence of passive margin tectonics 1 This 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 . 2 Geological Survey of Canada Contribution 20110319.
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 usin...
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crcansciencepubl:10.1139/e2012-061 2023-12-17T10:28:23+01:00 The provenance of Middle Jurassic sandstones in the Scotian Basin: petrographic evidence of passive margin tectonics 1 This 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 . 2 Geological Survey of Canada Contribution 20110319. Li, Gang Pe-Piper, Georgia Piper, David J.W. Dehler, Sonya Deptuck, Mark Karim, Atika 2012 http://dx.doi.org/10.1139/e2012-061 http://www.nrcresearchpress.com/doi/full-xml/10.1139/e2012-061 http://www.nrcresearchpress.com/doi/pdf/10.1139/e2012-061 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 49, issue 12, page 1463-1477 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 2012 crcansciencepubl https://doi.org/10.1139/e2012-061 2023-11-19T13:38:53Z 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. Article in Journal/Newspaper Breton Island Greenland Canadian Science Publishing (via Crossref) Canada Greenland Breton Island ENVELOPE(141.383,141.383,-66.800,-66.800) Canso ENVELOPE(-59.050,-59.050,-63.683,-63.683) Canadian Journal of Earth Sciences 49 12 1463 1477 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Li, Gang Pe-Piper, Georgia Piper, David J.W. The provenance of Middle Jurassic sandstones in the Scotian Basin: petrographic evidence of passive margin tectonics 1 This 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 . 2 Geological Survey of Canada Contribution 20110319. |
topic_facet |
General Earth and Planetary Sciences |
description |
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. |
author2 |
Dehler, Sonya Deptuck, Mark Karim, Atika |
format |
Article in Journal/Newspaper |
author |
Li, Gang Pe-Piper, Georgia Piper, David J.W. |
author_facet |
Li, Gang Pe-Piper, Georgia Piper, David J.W. |
author_sort |
Li, Gang |
title |
The provenance of Middle Jurassic sandstones in the Scotian Basin: petrographic evidence of passive margin tectonics 1 This 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 . 2 Geological Survey of Canada Contribution 20110319. |
title_short |
The provenance of Middle Jurassic sandstones in the Scotian Basin: petrographic evidence of passive margin tectonics 1 This 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 . 2 Geological Survey of Canada Contribution 20110319. |
title_full |
The provenance of Middle Jurassic sandstones in the Scotian Basin: petrographic evidence of passive margin tectonics 1 This 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 . 2 Geological Survey of Canada Contribution 20110319. |
title_fullStr |
The provenance of Middle Jurassic sandstones in the Scotian Basin: petrographic evidence of passive margin tectonics 1 This 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 . 2 Geological Survey of Canada Contribution 20110319. |
title_full_unstemmed |
The provenance of Middle Jurassic sandstones in the Scotian Basin: petrographic evidence of passive margin tectonics 1 This 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 . 2 Geological Survey of Canada Contribution 20110319. |
title_sort |
provenance of middle jurassic sandstones in the scotian basin: petrographic evidence of passive margin tectonics 1 this 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 . 2 geological survey of canada contribution 20110319. |
publisher |
Canadian Science Publishing |
publishDate |
2012 |
url |
http://dx.doi.org/10.1139/e2012-061 http://www.nrcresearchpress.com/doi/full-xml/10.1139/e2012-061 http://www.nrcresearchpress.com/doi/pdf/10.1139/e2012-061 |
long_lat |
ENVELOPE(141.383,141.383,-66.800,-66.800) ENVELOPE(-59.050,-59.050,-63.683,-63.683) |
geographic |
Canada Greenland Breton Island Canso |
geographic_facet |
Canada Greenland Breton Island Canso |
genre |
Breton Island Greenland |
genre_facet |
Breton Island Greenland |
op_source |
Canadian Journal of Earth Sciences volume 49, issue 12, page 1463-1477 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e2012-061 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
49 |
container_issue |
12 |
container_start_page |
1463 |
op_container_end_page |
1477 |
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