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![(a) Map of the Ottawa-Bonnechere Graben at the boundary between Quebec and Ontario Province. Major fault features (extracted from Lamontagne et al. 2003) and seismicity with earthquake magnitude from 2 to 5 (red dots = M4–5, purple dots = M3–4) (International Seismological Centre 2021) in the OBG plotted on a 30 m ASTER global digital elevation model (https://doi.org/10.5067/ASTER/ASTGTM.003). The blue semiparallel east–west polygon indicates the location of Fig. 5. Numbers in white boxes represent faults investigated in this study: 1, Mattawa River Fault; 2, Coulonge Fault; 3, Eardley Fault; 4, Gatineau Fault; 5, Lachute fault; 6, New-Glasgow Fault; 7, Sainte-Julienne Fault; 8, Saint-Maurice Fault. (b) Photograph looking to the northeast showing the typical morphology of a northwest–southeast-oriented bedrock escarpment (goalpost as a scale approximately 2.5 m).]()
![Seismicity in the Ottawa-Bonnechere Graben. (a) Earthquake epicentral plot from the eastern Canada earthquake bulletin from 1930–2022 with earthquake magnitude from 3 to 6 (red dots = M5–6, orange dots = M4–4.9, and green dots = M3–3.9) (https://earthquakescanada.nrcan.gc.ca/index-en.php) plotted on a 30 m ASTER global digital elevation model (https://doi.org/10.5067/ASTER/ASTGTM.003). Black lines are fault lines from Lamontagne et al. (2020). (b) Earthquake focal mechanisms plotted with red and white beachball and labelled with year and magnitude. Focal mechanism solutions are from Bent et al. (2002, 2003, 2015); Du et al. (2003); Ma et al. (2008).]()
![(a) Generalized geological map of Ottawa-Bonnechere Graben (OBG) modified from Geological Map of Canada Map D1860A (1996) (http://geoscan.nrcan.gc.ca/) and overlaid by faults from Lamontagne et al. (2020) and geologic cross sections of (b) the western section A′–A, (c) middle section B′–B, and (d) eastern section of OBG C′–C.]()
![(a) Swath profiles along west–east Ottawa-Bonnechere Graben along major fault features in black lines from Lamontagne et al. (2020) plotted on a 30 m ASTER global digital elevation model (https://doi.org/10.5067/ASTER/ASTGTM.003). (b) Drainage basins with black polygons and blue lines as rivers distributed along fault lines in the northern arm of the OBG (represented by black lines). Black arrows indicated the drainage section divide and fault borders. Drainage basins numbering can be seen on Fig. S1 in Supplementary Material.]()
![Compiled channel steepness analysis (ksn) in Ottawa-Bonnechere Graben (refer to Fig. 1 for location). Full result of ksn is available in Fig. S2. (a) The structural distribution map shows faults in this study, interpreted lineaments, and other faults (Lamontagne et al. 2020) overlaid on local relief displayed using a 2.5 km sampling radius. (b) Map of the spatial distribution of ksn with the red-coloured channel lines with indicated high ksn value; high local relief in represented with black; note the overriding high ksn and high local relief highlighted in the light blue box while dark blue box indicated the zoom-in of Figs. 6c and 6d. (c) The western segment of OBG included the Mattawa River Fault and Coulonge Fault. (d) The eastern segment of OBG covered Saint-Maurice Fault.]()
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Ottawa-Bonnechere Graben
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Journal Article
Tectonic geomorphology of the Ottawa-Bonnechere Graben, Eastern Canada: implications for regional uplift and intraplate seismicity Available to Purchase
Journal: Canadian Journal of Earth Sciences
Publisher: Canadian Science Publishing
Published: 15 February 2023
Canadian Journal of Earth Sciences (2023) 60 (6): 635–652.
... earthquake distribution, and long earthquake recurrence intervals. The cause(s) of seismicity in eastern Canada remains unresolved. This is partially because surface expressions of faults have been eroded during glacial and deglacial periods and in the Ottawa-Bonnechere Graben (OBG) are undetectable until...
FIGURES
Includes: Supplemental Content
Journal Article
Upper Ordovician (Sandbian–Katian) carbonate outliers in the northern Ottawa–Bonnechere graben (central Canada): records of transgressions and sedimentation patterns in the Laurentian platform interior Available to Purchase
Journal: Canadian Journal of Earth Sciences
Publisher: Canadian Science Publishing
Published: 08 June 2020
Canadian Journal of Earth Sciences (2021) 58 (1): 1–20.
...He Kang; George R. Dix Small Ordovician sedimentary outliers, including Brent Crater, within the northern Ottawa–Bonnechere graben are remnants of a once expansive Upper Ordovician sedimentary cover extending across the southern Canadian Shield. Facies successions along with updated macrofossil...
FIGURES
Journal Article
The 5.2 magnitude earthquake near Ladysmith, Quebec, 17 May 2013: implications for the seismotectonics of the Ottawa–Bonnechere Graben Available to Purchase
Journal: Canadian Journal of Earth Sciences
Publisher: Canadian Science Publishing
Published: 20 March 2014
Canadian Journal of Earth Sciences (2014) 51 (5): 439–451.
... the southwest margin of the WQSZ since 1935, and provides important seismotectonic constraints of the intra-cratonic Ottawa–Bonnechere Graben (OBG). We performed a number of analyses of the main shock and aftershocks to determine source properties and obtain structural information. First, a moment tensor...
FIGURES
Journal Article
Ottawa-Bonnechere graben and Lake Ontario homocline Available to Purchase
Journal: GSA Bulletin
Publisher: Geological Society of America
Published: 01 April 1942
GSA Bulletin (1942) 53 (4): 585–646.
...G. MARSHALL KAY Abstract The northwest-trending Ottawa-Bonnechere graben is separated from the Lake Ontario homocline, the northern border of the Allegheny synclinorium, by the block-faulted Madawaska Highlands of central Ontario. Ordovician sediments are preserved as infaulted outliers...
Image
( a ) Map of the Ottawa-Bonnechere Graben at the boundary between Quebec an... Available to Purchase
in Tectonic geomorphology of the Ottawa-Bonnechere Graben, Eastern Canada: implications for regional uplift and intraplate seismicity
> Canadian Journal of Earth Sciences
Published: 15 February 2023
Fig. 1. ( a ) Map of the Ottawa-Bonnechere Graben at the boundary between Quebec and Ontario Province. Major fault features (extracted from Lamontagne et al. 2003 ) and seismicity with earthquake magnitude from 2 to 5 (red dots = M4–5, purple dots = M3–4) ( International Seismological Centre
Image
Seismicity in the Ottawa-Bonnechere Graben. ( a ) Earthquake epicentral plo... Available to Purchase
in Tectonic geomorphology of the Ottawa-Bonnechere Graben, Eastern Canada: implications for regional uplift and intraplate seismicity
> Canadian Journal of Earth Sciences
Published: 15 February 2023
Fig. 2. Seismicity in the Ottawa-Bonnechere Graben. ( a ) Earthquake epicentral plot from the eastern Canada earthquake bulletin from 1930–2022 with earthquake magnitude from 3 to 6 (red dots = M5–6, orange dots = M4–4.9, and green dots = M3–3.9) ( https://earthquakescanada.nrcan.gc.ca/index
Image
( a ) Generalized geological map of Ottawa-Bonnechere Graben (OBG) modified... Available to Purchase
in Tectonic geomorphology of the Ottawa-Bonnechere Graben, Eastern Canada: implications for regional uplift and intraplate seismicity
> Canadian Journal of Earth Sciences
Published: 15 February 2023
Fig. 3. ( a ) Generalized geological map of Ottawa-Bonnechere Graben (OBG) modified from Geological Map of Canada Map D1860A (1996) ( http://geoscan.nrcan.gc.ca/ ) and overlaid by faults from Lamontagne et al. (2020) and geologic cross sections of ( b ) the western section A′–A, ( c ) middle
Image
( a ) Swath profiles along west–east Ottawa-Bonnechere Graben along major f... Available to Purchase
in Tectonic geomorphology of the Ottawa-Bonnechere Graben, Eastern Canada: implications for regional uplift and intraplate seismicity
> Canadian Journal of Earth Sciences
Published: 15 February 2023
Fig. 5. ( a ) Swath profiles along west–east Ottawa-Bonnechere Graben along major fault features in black lines from Lamontagne et al. (2020) plotted on a 30 m ASTER global digital elevation model ( https://doi.org/10.5067/ASTER/ASTGTM.003 ). ( b ) Drainage basins with black polygons and blue
Image
Compiled channel steepness analysis ( k sn ) in Ottawa-Bonnechere Graben (... Available to Purchase
in Tectonic geomorphology of the Ottawa-Bonnechere Graben, Eastern Canada: implications for regional uplift and intraplate seismicity
> Canadian Journal of Earth Sciences
Published: 15 February 2023
Fig. 7. Compiled channel steepness analysis ( k sn ) in Ottawa-Bonnechere Graben (refer to Fig. 1 for location). Full result of k sn is available in Fig. S2. ( a ) The structural distribution map shows faults in this study, interpreted lineaments, and other faults ( Lamontagne et al. 2020
Journal Article
Crustal Shear‐Wave Velocity Models Retrieved from Rayleigh‐Wave Dispersion Data in Northeastern North America Available to Purchase
Publisher: Seismological Society of America
Published: 01 August 2013
Bulletin of the Seismological Society of America (2013) 103 (4): 2266–2276.
... all 14 models and found that there are low‐velocity layers in the top 10 km on the north side of the Ottawa–Bonnechere graben. Based on model similarity, we formed one model for the north side by averaging the north‐side models and another model for the south side by averaging the south‐side models...
FIGURES
Journal Article
The post-orogenic history of the Adirondack Mountain region: A review Available to Purchase
Journal: GSA Bulletin
Publisher: Geological Society of America
Published: 01 February 1980
GSA Bulletin (1980) 91 (2): 120–124.
...BRUCE W. SELLECK Abstract A number of episodes in the post-orogenic history of the Adirondack Mountains and adjacent Paleozoic Lowlands are recognized. A late Hadrynian—early Cambrian tensional episode is suggested by the presence of nonmarine graben facies and extrusive volcanics. The Ottawa...
Journal Article
A new geological framework for the Middle Ordovician Carillon Formation (uppermost Beekmantown Group, Ottawa Embayment): onset of Taconic foreland deposition and tectonism within the Laurentian platform interior Available to Purchase
Journal: Canadian Journal of Earth Sciences
Publisher: Canadian Science Publishing
Published: 28 November 2006
Canadian Journal of Earth Sciences (2006) 43 (9): 1367–1387.
...George R. Dix; Zuhor Al Rodhan Abstract The Carillon Formation underlies the Ottawa Embayment, a craton-interior extension of the regional Laurentian paleoshelf, defined today by the Ottawa–Bonnechere Graben. Facies within the embayment during the Middle Or dovician identify a mixed-sediment...
FIGURES
Journal Article
Late Ordovician (Chatfieldian) catastrophic volcanism and abrupt carbonate platform-interior subsidence: A tectonic link across a Taconian foreland basin (Québec Embayment) due to inherited crustal weakness Available to Purchase
Journal: GSA Bulletin
Publisher: Geological Society of America
Published: 01 September 2011
GSA Bulletin (2011) 123 (9-10): 1988–2004.
... in this region, in response to distal tectonism, may have been predicated by inherited weakness of a shallowly buried intracratonic (>400km) Precambrian fault system, manifest today by the Ottawa-Bonnechère Graben. The resulting thin (<10- to 30-m) stratigraphic record of the tectonomagmatic event...
FIGURES
Journal Article
THERMAL MATURATION, BURIAL HISTORY AND HOTSPOT DEVELOPMENT, PALEOZOIC STRATA OF SOUTHERN ONTARIO - QUEBEC, FROM CONODONT AND ACRITARCH COLOUR ALTERATION STUDIES Available to Purchase
Publisher: Canadian Society of Petroleum Geologists
Published: 01 December 1981
Bulletin of Canadian Petroleum Geology (1981) 29 (4): 492–539.
... of 60-90°C. At these higher temperatures acritarchs become degraded and AAI 5 is attained. In eastern Ontario and southern Quebec a third thermal alteration facies exists in which CAI values reach 3 along the Ottawa-Bonnechère graben and 4-5 in the vicinity of Montreal, reflecting maximum burial...
Journal Article
Characteristics of the 17 May 2013 M 4.5 Ladysmith, Quebec, Earthquake Available to Purchase
Journal: Seismological Research Letters
Publisher: Seismological Society of America
Published: 01 May 2014
Seismological Research Letters (2014) 85 (3): 755–762.
... and attenuation characteristics of the Ladysmith event were typical for regional events. The earthquake occurred within the boundaries of the Ottawa–Bonnechere graben, which suggests a reactivation of one of its faults, though it is unclear which fault was involved. The focal mechanism does not match...
FIGURES
Journal Article
U-Pb DATING OF A DIABASE DIKE RESOLVES THE PROBLEM OF MUTUALLY CROSSCUTTING RELATIONSHIPS WITHIN THE FRASER-STRATHCONA DEEP COPPER VEIN SYSTEM, SUDBURY BASIN Available to Purchase
Journal: Economic Geology
Publisher: Society of Economic Geologists
Published: 01 December 2006
Economic Geology (2006) 101 (8): 1595–1603.
.... The discordance results from recent Pb loss, which may have been related to brittle fracturing and fluid infiltration during exhumation and mild deformation. The diabase dike is interpreted to be part of the 500 to 600 Ma extension and rifting that formed the Ottawa-Bonnechere graben and related features during...
FIGURES
Journal Article
Paleokarst in the Lower Ordovician Beekmantown Group, Ottawa Embayment: Structural control inboard of the Appalachian orogen Available to Purchase
Journal: GSA Bulletin
Publisher: Geological Society of America
Published: 01 August 1998
GSA Bulletin (1998) 110 (8): 1046–1059.
..., now defined by the Ottawa-Bonnechere Graben. Faulting was contemporaneous with initiation of the crustal forebulge within the distal, developing Taconic orogen. Mineralized, intrastratal, vuggy to local cavernous porosity composes a prominent second, more regional paleokarst. Dissolution followed...
Journal Article
Character of the Middle Ordovician Sauk-Tippecanoe sequence boundary in the Ottawa Embayment (eastern Ontario): possible evidence for platform-interior, Taconic tectonism Free
Journal: Canadian Journal of Earth Sciences
Publisher: Canadian Science Publishing
Published: 01 June 1998
Canadian Journal of Earth Sciences (1998) 35 (6): 603–619.
... along an underlying, shallowly buried Proterozoic fault system, later manifest as the Ottawa-Bonnechere Graben. Dans la partie orientale de l'Ontario, la disconformité de l'Ordovicien moyen qui sépare les grès prédominants de la Formation de Rockcliffe d'avec la dolomie de la Formation de Carillon...
Journal Article
Crustal velocity structure of the Superior and Grenville provinces of the southeastern Canadian Shield Free
Journal: Canadian Journal of Earth Sciences
Publisher: Canadian Science Publishing
Published: 01 August 1997
Canadian Journal of Earth Sciences (1997) 34 (8): 1167–1184.
... diffuse and flat boundary under the Abitibi Greenstone Belt north of the Grenville Front. A significant crustal thinning near the Grenville Front may indicate post-Grenvillian rebound and (or) the extensional structure of the Ottawa–Bonnechere graben. Crustal thickening resulting from continental...
Journal Article
Un diatrème phréatomagmatique montérégien dans les Appalaches du Québec Free
Journal: Canadian Journal of Earth Sciences
Publisher: Canadian Science Publishing
Published: 01 May 1996
Canadian Journal of Earth Sciences (1996) 33 (5): 649–655.
... corridors: the north-north-east Baie Verte – Brompton line and an east−west fault network along the prolongation of the Ottawa−Bonnechère Graben. These structures are zones of weakness that probably served as a conduit for the ascending magma and near-surface water to trigger phreatomagmatic eruptions...
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