Detrital mineralogy and petrology of deep-water continental margin sediments off Newfoundland
Seventeen long piston cores have been examined from the continental slope and rise off the Grand Banks and from nearby seamounts. Most cores penetrate Holocene and late Wisconsinan sediment. Four main facies groups are distinguished: A — red terrigenous sediment; B — gray terrigenous sediment (inclu...
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Canadian Science Publishing
1981
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crcansciencepubl:10.1139/e81-123 2023-12-17T10:26:17+01:00 Detrital mineralogy and petrology of deep-water continental margin sediments off Newfoundland Alam, Mahmood Piper, David J. W. 1981 http://dx.doi.org/10.1139/e81-123 http://www.nrcresearchpress.com/doi/pdf/10.1139/e81-123 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 18, issue 8, page 1336-1345 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1981 crcansciencepubl https://doi.org/10.1139/e81-123 2023-11-19T13:38:46Z Seventeen long piston cores have been examined from the continental slope and rise off the Grand Banks and from nearby seamounts. Most cores penetrate Holocene and late Wisconsinan sediment. Four main facies groups are distinguished: A — red terrigenous sediment; B — gray terrigenous sediment (including turbidite sands); C — calcareous (mostly biogenic) sediment; and D — diatomaceous sediment. Facies C and D characterize the Holocene and interstadials; facies A and B were developed during stadials.Three suites of ice-rafted debris are distinguished: (i) a metamorphic-dominated suite, derived either from Greenland and Baffin Island or from local Labrador and Newfoundland ice; (ii) a carbonate-dominated suite, derived from the Arctic Islands; and (iii) a red sandstone – siltstone suite, derived from the Gulf of St. Lawrence and its environs.Three heavy mineral assemblages are recognized: on the Grand Banks slope — pyroxene, opaques, amphiboles, and garnet; in Flemish Pass — opaques, pyroxene, garnet, and tourmaline; and on the western Grand Banks rise — opaques, pyroxene, tourmaline, and garnet.In the biogenic facies C and D, which have slower rates of sedimentation and more ice-rafting corresponding to high stands of sea level, there is little geographic variation in clay mineral assemblage, with montmorillonitic minerals dominant. In the terrigenous facies A and B, which accumulated during glacio-eustatic lower sea-level stands, there is considerable geographic variation, suggesting derivation from local sources on the shelf through wave or glacial erosion. Article in Journal/Newspaper Arctic Baffin Island Baffin Greenland Newfoundland Canadian Science Publishing (via Crossref) Arctic Newfoundland Baffin Island Greenland Banks Slope ENVELOPE(-128.000,-128.000,74.500,74.500) Banks Rise ENVELOPE(-132.000,-132.000,75.500,75.500) Canadian Journal of Earth Sciences 18 8 1336 1345 |
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Open Polar |
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Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Alam, Mahmood Piper, David J. W. Detrital mineralogy and petrology of deep-water continental margin sediments off Newfoundland |
topic_facet |
General Earth and Planetary Sciences |
description |
Seventeen long piston cores have been examined from the continental slope and rise off the Grand Banks and from nearby seamounts. Most cores penetrate Holocene and late Wisconsinan sediment. Four main facies groups are distinguished: A — red terrigenous sediment; B — gray terrigenous sediment (including turbidite sands); C — calcareous (mostly biogenic) sediment; and D — diatomaceous sediment. Facies C and D characterize the Holocene and interstadials; facies A and B were developed during stadials.Three suites of ice-rafted debris are distinguished: (i) a metamorphic-dominated suite, derived either from Greenland and Baffin Island or from local Labrador and Newfoundland ice; (ii) a carbonate-dominated suite, derived from the Arctic Islands; and (iii) a red sandstone – siltstone suite, derived from the Gulf of St. Lawrence and its environs.Three heavy mineral assemblages are recognized: on the Grand Banks slope — pyroxene, opaques, amphiboles, and garnet; in Flemish Pass — opaques, pyroxene, garnet, and tourmaline; and on the western Grand Banks rise — opaques, pyroxene, tourmaline, and garnet.In the biogenic facies C and D, which have slower rates of sedimentation and more ice-rafting corresponding to high stands of sea level, there is little geographic variation in clay mineral assemblage, with montmorillonitic minerals dominant. In the terrigenous facies A and B, which accumulated during glacio-eustatic lower sea-level stands, there is considerable geographic variation, suggesting derivation from local sources on the shelf through wave or glacial erosion. |
format |
Article in Journal/Newspaper |
author |
Alam, Mahmood Piper, David J. W. |
author_facet |
Alam, Mahmood Piper, David J. W. |
author_sort |
Alam, Mahmood |
title |
Detrital mineralogy and petrology of deep-water continental margin sediments off Newfoundland |
title_short |
Detrital mineralogy and petrology of deep-water continental margin sediments off Newfoundland |
title_full |
Detrital mineralogy and petrology of deep-water continental margin sediments off Newfoundland |
title_fullStr |
Detrital mineralogy and petrology of deep-water continental margin sediments off Newfoundland |
title_full_unstemmed |
Detrital mineralogy and petrology of deep-water continental margin sediments off Newfoundland |
title_sort |
detrital mineralogy and petrology of deep-water continental margin sediments off newfoundland |
publisher |
Canadian Science Publishing |
publishDate |
1981 |
url |
http://dx.doi.org/10.1139/e81-123 http://www.nrcresearchpress.com/doi/pdf/10.1139/e81-123 |
long_lat |
ENVELOPE(-128.000,-128.000,74.500,74.500) ENVELOPE(-132.000,-132.000,75.500,75.500) |
geographic |
Arctic Newfoundland Baffin Island Greenland Banks Slope Banks Rise |
geographic_facet |
Arctic Newfoundland Baffin Island Greenland Banks Slope Banks Rise |
genre |
Arctic Baffin Island Baffin Greenland Newfoundland |
genre_facet |
Arctic Baffin Island Baffin Greenland Newfoundland |
op_source |
Canadian Journal of Earth Sciences volume 18, issue 8, page 1336-1345 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e81-123 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
18 |
container_issue |
8 |
container_start_page |
1336 |
op_container_end_page |
1345 |
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1785578000002056192 |