Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1130/B31749.1 |
Early Paleozoic rifting and reactivation of a passive-margin rift: Insights from detrital zircon provenance signatures of the Potsdam Group, Ottawa graben | |
Lowe, David G.1; Arnott, R. W. C.1; Chiarenzelli, Jeffrey R.2; Rainbird, Robert H.3 | |
2018-07-01 | |
发表期刊 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN |
ISSN | 0016-7606 |
EISSN | 1943-2674 |
出版年 | 2018 |
卷号 | 130页码:1377-1396 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada; USA |
英文摘要 | The Ottawa graben is a Neoproterozoic intracratonic rift in northeastern North America that was reactivated throughout the Phanerozoic and persists as a modern seismically active zone of lithospheric weakness with extant topography. U-Pb geochronology of detrital zircon grains, paleoflow directions, and stratigraphic data from the Potsdam Group provide evidence of early Paleozoic rifting and reactivation of the passive-margin Ottawa graben. Early to middle Cambrian rifting (ca. 515-505 Ma) coincided with the opening of fault-bounded subbasins that were filled with arkose derived from local rift shoulders consisting mainly of ca. 1176 Ma Grenville sources from the Frontenac terrane. Additionally, the local presence of ca. 1442 Ma zircon grains suggests extensive opening of the Ottawa graben along the modern Ottawa River Valley, which provided a localized conduit for transport of sediment sourced from parts of the Central Gneiss belt, similar to 350-400 km to the west. Early to middle Cambrian rifting of the Ottawa graben coincided with evidence of more widespread rifting across the Laurentian margin, suggesting that the Laurentian passive-margin rift-to-drift transition did not occur until the middle Cambrian. Later, late middle to early late Cambrian reactivation of the Ottawa graben resulted in topographic inversion marked by uplift of the adjacent Adirondack Dome, and radial dispersal of sediment with introduction of ca. 1060-1000 Ma detrital zircon grains throughout the Ottawa graben. A second episode of reactivation and topographic inversion occurred during the earliest Ordovician, marked by subsidence of the Adirondack Dome and uplift of parts of the northern Ottawa graben. This resulted in southeastward drainage and the reintroduction of ca. 1442 Ma zircon grains via reworking of older Potsdam strata and/or direct sourcing from parts of the Central Gneiss belt to the west. These two enigmatic, passive-margin early Paleozoic reactivations are correlated with events along the Laurentian margin, for example, early Furongian shelf erosion, especially near the Saguenay graben, and they are linked to perturbations in the intraplate stress field driven by plate-boundary forces originating from the peri-Laurentian and Iapetan regions. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000437009200020 |
WOS关键词 | CENTRAL METASEDIMENTARY BELT ; U-PB GEOCHRONOLOGY ; NEW-YORK-STATE ; EASTERN NORTH-AMERICA ; BONDY GNEISS COMPLEX ; GRENVILLE PROVINCE ; ADIRONDACK MOUNTAINS ; NEPEAN-FORMATION ; CANADIAN APPALACHIANS ; WESTERN NEWFOUNDLAND |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/24851 |
专题 | 地球科学 |
作者单位 | 1.Univ Ottawa, Dept Earth & Environm Sci, Ottawa, ON K1N 6N5, Canada; 2.St Lawrence Univ, Dept Geol, Canton, NY 13617 USA; 3.Geol Survey Canada, 601 Booth St, Ottawa, ON K1A 0E8, Canada |
推荐引用方式 GB/T 7714 | Lowe, David G.,Arnott, R. W. C.,Chiarenzelli, Jeffrey R.,et al. Early Paleozoic rifting and reactivation of a passive-margin rift: Insights from detrital zircon provenance signatures of the Potsdam Group, Ottawa graben[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2018,130:1377-1396. |
APA | Lowe, David G.,Arnott, R. W. C.,Chiarenzelli, Jeffrey R.,&Rainbird, Robert H..(2018).Early Paleozoic rifting and reactivation of a passive-margin rift: Insights from detrital zircon provenance signatures of the Potsdam Group, Ottawa graben.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,130,1377-1396. |
MLA | Lowe, David G.,et al."Early Paleozoic rifting and reactivation of a passive-margin rift: Insights from detrital zircon provenance signatures of the Potsdam Group, Ottawa graben".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 130(2018):1377-1396. |
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