Burial Metamorphism of Late Precambrian Sediments near St. John's, Newfoundland
The lowest member of the Late Precambrian Signal Hill Formation (a massive, gray, lithic sandstone), exposed at the eastern extremity of the Avalon Peninsula near St. John's, Newfoundland, is cut by a system of thin veins containing quartz, calcite, and whitish prehnite. The veins, confined to...
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Canadian Science Publishing
1972
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Online Access: | http://dx.doi.org/10.1139/e72-139 http://www.nrcresearchpress.com/doi/pdf/10.1139/e72-139 |
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crcansciencepubl:10.1139/e72-139 2023-12-17T10:44:24+01:00 Burial Metamorphism of Late Precambrian Sediments near St. John's, Newfoundland Papezik, V. S. 1972 http://dx.doi.org/10.1139/e72-139 http://www.nrcresearchpress.com/doi/pdf/10.1139/e72-139 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 9, issue 11, page 1568-1572 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1972 crcansciencepubl https://doi.org/10.1139/e72-139 2023-11-19T13:38:46Z The lowest member of the Late Precambrian Signal Hill Formation (a massive, gray, lithic sandstone), exposed at the eastern extremity of the Avalon Peninsula near St. John's, Newfoundland, is cut by a system of thin veins containing quartz, calcite, and whitish prehnite. The veins, confined to a narrow stratigraphic horizon, have been found, so far, along a strike distance of 4 km. Prehnite also forms small diffuse patches in the rock, producing a distinctive mottling effect; it is associated with authigenic quartz, sericite, chlorite, and small amounts of possibly metasomatic calcite.The prehnite-bearing mineral assemblage is consistent with mineral characteristics of the prehnite–pumpellyite facies, usually considered to be the result of burial metamorphism. The patchy interstitial prehnite is believed to have been formed by a reaction between authigenic laumontite and calcite. The prehnite-bearing assemblage may have been formed under a lithostatic load not greatly exceeding the present maximum thickness of the overlying part of the Cabot Group – about 4.5 km. The formation of both the interstitial prehnite and the prehnite-bearing veins was contemporaneous with the tectonic stresses responsible for the open folding of the Cabot Group. Article in Journal/Newspaper Newfoundland Canadian Science Publishing (via Crossref) Cabot ENVELOPE(-54.600,-54.600,-63.383,-63.383) Canadian Journal of Earth Sciences 9 11 1568 1572 |
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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 Papezik, V. S. Burial Metamorphism of Late Precambrian Sediments near St. John's, Newfoundland |
topic_facet |
General Earth and Planetary Sciences |
description |
The lowest member of the Late Precambrian Signal Hill Formation (a massive, gray, lithic sandstone), exposed at the eastern extremity of the Avalon Peninsula near St. John's, Newfoundland, is cut by a system of thin veins containing quartz, calcite, and whitish prehnite. The veins, confined to a narrow stratigraphic horizon, have been found, so far, along a strike distance of 4 km. Prehnite also forms small diffuse patches in the rock, producing a distinctive mottling effect; it is associated with authigenic quartz, sericite, chlorite, and small amounts of possibly metasomatic calcite.The prehnite-bearing mineral assemblage is consistent with mineral characteristics of the prehnite–pumpellyite facies, usually considered to be the result of burial metamorphism. The patchy interstitial prehnite is believed to have been formed by a reaction between authigenic laumontite and calcite. The prehnite-bearing assemblage may have been formed under a lithostatic load not greatly exceeding the present maximum thickness of the overlying part of the Cabot Group – about 4.5 km. The formation of both the interstitial prehnite and the prehnite-bearing veins was contemporaneous with the tectonic stresses responsible for the open folding of the Cabot Group. |
format |
Article in Journal/Newspaper |
author |
Papezik, V. S. |
author_facet |
Papezik, V. S. |
author_sort |
Papezik, V. S. |
title |
Burial Metamorphism of Late Precambrian Sediments near St. John's, Newfoundland |
title_short |
Burial Metamorphism of Late Precambrian Sediments near St. John's, Newfoundland |
title_full |
Burial Metamorphism of Late Precambrian Sediments near St. John's, Newfoundland |
title_fullStr |
Burial Metamorphism of Late Precambrian Sediments near St. John's, Newfoundland |
title_full_unstemmed |
Burial Metamorphism of Late Precambrian Sediments near St. John's, Newfoundland |
title_sort |
burial metamorphism of late precambrian sediments near st. john's, newfoundland |
publisher |
Canadian Science Publishing |
publishDate |
1972 |
url |
http://dx.doi.org/10.1139/e72-139 http://www.nrcresearchpress.com/doi/pdf/10.1139/e72-139 |
long_lat |
ENVELOPE(-54.600,-54.600,-63.383,-63.383) |
geographic |
Cabot |
geographic_facet |
Cabot |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Canadian Journal of Earth Sciences volume 9, issue 11, page 1568-1572 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e72-139 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
9 |
container_issue |
11 |
container_start_page |
1568 |
op_container_end_page |
1572 |
_version_ |
1785562217929768960 |