Mechanics of the giant radiating Mackenzie dyke swarm: A paleostress field modeling
The 1.27 Ga Mackenzie dyke swarm of the Canadian Shield is a giant radiating dyke swarm that gradually swings in orientation from N-S in the focal area to NW-SE trends in peripheral areas. In this paper, we propose a new model (the "Plug'' model) that accounts for the paleostress cont...
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ftpekinguniv:oai:localhost:20.500.11897/155888 2023-05-15T15:56:43+02:00 Mechanics of the giant radiating Mackenzie dyke swarm: A paleostress field modeling Hou, Guiting Kusky, T. M. Wang, Chuancheng Wang, Yanxin Hou, GT (reprint author), Peking Univ, Sch Earth & Space Sci, Key Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China. Peking Univ, Sch Earth & Space Sci, Key Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China. China Univ Geosci, Gorges Geohazards Res Ctr 3, Wuhan 430074, Peoples R China. China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China. 2010 https://hdl.handle.net/20.500.11897/155888 https://doi.org/10.1029/2007JB005475 en eng journal of geophysical research solid earth JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH.2010,115. 935734 0148-0227 http://hdl.handle.net/20.500.11897/155888 doi:10.1029/2007JB005475 WOS:000274359300001 SCI INTRAPLATE STRESS-FIELD ELASTIC THICKNESS TECTONIC IMPLICATIONS CANADIAN SHIELD LABRADOR SEA EMPLACEMENT PROVINCE RECONSTRUCTION LAURENTIA PLATE Journal 2010 ftpekinguniv https://doi.org/20.500.11897/155888 https://doi.org/10.1029/2007JB005475 2021-08-01T08:02:58Z The 1.27 Ga Mackenzie dyke swarm of the Canadian Shield is a giant radiating dyke swarm that gradually swings in orientation from N-S in the focal area to NW-SE trends in peripheral areas. In this paper, we propose a new model (the "Plug'' model) that accounts for the paleostress contribution to the mechanism of emplacement for the Mackenzie dyke swarm in the Canadian Shield. The 1.27 Ga stress field on the Canadian Shield calculated by the "Plug'' model explains the radiating nature of the Mackenzie dyke swarm around the Coppermine River lava field by local stress concentrations. The parallel nature of the dyke swarm at distance (more than 1000 km) from the focal source can be explained by the existence of a regional tectonic stress field created by ridge push acting on the southeast margin of the Canadian Shield from the Grenville Ocean. The thin elastic plate and two-dimensional cross-section modeling suggest that the interaction between stresses from a mantle upwelling and the Grenville Ocean spreading play an important role in the intrusion mechanism of the Mackenzie dyke swarm. The change in dyke orientation from N-S trending to NW-SE trending is caused by coupling between resistance from the focal area (Plug area) and a Grenville Ocean ridge push. http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000274359300001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 Geochemistry & Geophysics SCI(E) 8 ARTICLE null 115 Journal/Newspaper Coppermine River Labrador Sea Peking University Institutional Repository (PKU IR) Journal of Geophysical Research 115 B2 |
institution |
Open Polar |
collection |
Peking University Institutional Repository (PKU IR) |
op_collection_id |
ftpekinguniv |
language |
English |
topic |
INTRAPLATE STRESS-FIELD ELASTIC THICKNESS TECTONIC IMPLICATIONS CANADIAN SHIELD LABRADOR SEA EMPLACEMENT PROVINCE RECONSTRUCTION LAURENTIA PLATE |
spellingShingle |
INTRAPLATE STRESS-FIELD ELASTIC THICKNESS TECTONIC IMPLICATIONS CANADIAN SHIELD LABRADOR SEA EMPLACEMENT PROVINCE RECONSTRUCTION LAURENTIA PLATE Hou, Guiting Kusky, T. M. Wang, Chuancheng Wang, Yanxin Mechanics of the giant radiating Mackenzie dyke swarm: A paleostress field modeling |
topic_facet |
INTRAPLATE STRESS-FIELD ELASTIC THICKNESS TECTONIC IMPLICATIONS CANADIAN SHIELD LABRADOR SEA EMPLACEMENT PROVINCE RECONSTRUCTION LAURENTIA PLATE |
description |
The 1.27 Ga Mackenzie dyke swarm of the Canadian Shield is a giant radiating dyke swarm that gradually swings in orientation from N-S in the focal area to NW-SE trends in peripheral areas. In this paper, we propose a new model (the "Plug'' model) that accounts for the paleostress contribution to the mechanism of emplacement for the Mackenzie dyke swarm in the Canadian Shield. The 1.27 Ga stress field on the Canadian Shield calculated by the "Plug'' model explains the radiating nature of the Mackenzie dyke swarm around the Coppermine River lava field by local stress concentrations. The parallel nature of the dyke swarm at distance (more than 1000 km) from the focal source can be explained by the existence of a regional tectonic stress field created by ridge push acting on the southeast margin of the Canadian Shield from the Grenville Ocean. The thin elastic plate and two-dimensional cross-section modeling suggest that the interaction between stresses from a mantle upwelling and the Grenville Ocean spreading play an important role in the intrusion mechanism of the Mackenzie dyke swarm. The change in dyke orientation from N-S trending to NW-SE trending is caused by coupling between resistance from the focal area (Plug area) and a Grenville Ocean ridge push. http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000274359300001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 Geochemistry & Geophysics SCI(E) 8 ARTICLE null 115 |
author2 |
Hou, GT (reprint author), Peking Univ, Sch Earth & Space Sci, Key Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China. Peking Univ, Sch Earth & Space Sci, Key Lab Orogen Belts & Crustal Evolut, Beijing 100871, Peoples R China. China Univ Geosci, Gorges Geohazards Res Ctr 3, Wuhan 430074, Peoples R China. China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China. |
format |
Journal/Newspaper |
author |
Hou, Guiting Kusky, T. M. Wang, Chuancheng Wang, Yanxin |
author_facet |
Hou, Guiting Kusky, T. M. Wang, Chuancheng Wang, Yanxin |
author_sort |
Hou, Guiting |
title |
Mechanics of the giant radiating Mackenzie dyke swarm: A paleostress field modeling |
title_short |
Mechanics of the giant radiating Mackenzie dyke swarm: A paleostress field modeling |
title_full |
Mechanics of the giant radiating Mackenzie dyke swarm: A paleostress field modeling |
title_fullStr |
Mechanics of the giant radiating Mackenzie dyke swarm: A paleostress field modeling |
title_full_unstemmed |
Mechanics of the giant radiating Mackenzie dyke swarm: A paleostress field modeling |
title_sort |
mechanics of the giant radiating mackenzie dyke swarm: a paleostress field modeling |
publisher |
journal of geophysical research solid earth |
publishDate |
2010 |
url |
https://hdl.handle.net/20.500.11897/155888 https://doi.org/10.1029/2007JB005475 |
genre |
Coppermine River Labrador Sea |
genre_facet |
Coppermine River Labrador Sea |
op_source |
SCI |
op_relation |
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH.2010,115. 935734 0148-0227 http://hdl.handle.net/20.500.11897/155888 doi:10.1029/2007JB005475 WOS:000274359300001 |
op_doi |
https://doi.org/20.500.11897/155888 https://doi.org/10.1029/2007JB005475 |
container_title |
Journal of Geophysical Research |
container_volume |
115 |
container_issue |
B2 |
_version_ |
1766392100987863040 |