The Upper Ordovician black shales of southern Quebec (Canada) and their significance for naturally occurring hydrocarbons in shallow groundwater

Lavoie, Denis; Pinet, Nicolas; Bordeleau, Geneviève; Ardakani, Omid H.; Ladevèze, Pierre; Duchesne, Mathieu J.; Rivard, Christine; Mort, Andy; Brake, V; Sanei, Hamed; Malet, Xavier

doi:10.1016/j.coal.2016.02.008

Cited by 32 publications

(46 citation statements)

References 47 publications

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“…The maximum age of the impact is stratigraphically constrained by the presence of shatter cones in Upper Ordovician (Katian; Lavoie et al. ) shallow marine limestones of the local “Riviere du Moulin facies” (Lemieux et al. ; Lemieux ), which are part of the Neuville Formation (Upper Trenton Group; Lavoie ).…”

Section: Previous Radioisotopic Analyses Of Impactites From Charlevoixmentioning

confidence: 99%

“…The timing of the large Charlevoix impact is still ambiguous. The maximum age of the impact is stratigraphically constrained by the presence of shatter cones in Upper Ordovician (Katian; Lavoie et al 2016) shallow marine limestones of the local "Riviere du Moulin facies" (Lemieux et al 2000;Lemieux 2001), which are part of the Neuville Formation (Upper Trenton Group;Lavoie 1993). This unit is well exposed at, for example, Cap-aux-Oies (e.g., Rondot 1968;Lemieux et al 2000;Goulet et al 2011; see map in Fig.…”

Section: Previous Radioisotopic Analyses Of Impactites From Charlevoixmentioning

confidence: 99%

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In situ U–Pb analysis of shocked zircon from the Charlevoix impact structure, Québec, Canada

Schmieder

Shaulis

Lapen

et al. 2019

Meteorit & Planetary Scien

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Laser ablation inductively coupled plasma‐mass spectrometry (LA‐ICP‐MS) U–Pb geochronology of shocked zircon grains in a vesicular‐fluidal impact melt rock from the ≥54 km Charlevoix impact structure, Québec, Canada, suggests an Ordovician to Silurian age of 450 ± 20 Ma for the impact. This age is anchored by concordant U–Pb results of ~450 Ma for a U‐rich, cryptocrystalline zircon grain in the melt rock, interpreted as a recrystallized metamict zircon crystal; the U–Th–Pb system of the metamict grain was seemingly chronometrically reset by the Charlevoix impact, but withstood later tectonometamorphic events. The new zircon age for Charlevoix is in agreement with a stratigraphically constrained Late Ordovician maximum age of ~453 Ma and corroborates earlier suggestions that the impact occurred most likely in the Ordovician, and not ~100 Myr later, as indicated by previous K/Ar and 40Ar/39Ar geochronologic results. The latter may reflect postimpact thermal overprint of impactites during the Salinian (Late Silurian to Early Devonian) and/or Acadian (Late Devonian) orogenies. U–Pb geochronology of zircon crystals in anorthosite exposed in the central uplift of the impact structure yielded a Grenvillian crystallization age of 1062 ± 11 Ma. The preferred Ordovician age for the Charlevoix impact structure, which is partially overthrusted by the Appalachian front, suggests the impact occurred during a phase of Taconian tectonism and an episode of enhanced asteroid bombardment of the Earth. Our results, moreover, demonstrate that (recrystallized) metamict zircon grains may be of particular interest in impact geochronology.

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Section: Previous Radioisotopic Analyses Of Impactites From Charlevoixmentioning

confidence: 99%

Section: Previous Radioisotopic Analyses Of Impactites From Charlevoixmentioning

confidence: 99%

In situ U–Pb analysis of shocked zircon from the Charlevoix impact structure, Québec, Canada

Schmieder

Shaulis

Lapen

et al. 2019

Meteorit & Planetary Scien

View full text Add to dashboard Cite

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“…The stratigraphic units of these two domains are similar, with the parautochtonous domain being significantly more deformed with imbricated thrust slices (Comeau et al, 2004). The sedimentary succession In the parautochtonous domain, the upper part of the succession is mostly constituted of black calcareous shales of the Les Fonds Formation, which is also part of the Sainte-Rosalie Group (Globensky, 1987;Lavoie et al, 2016). The Lotbinière and Les Fonds formations are time and facies-correlatives to the Utica Shale, which can be found at a depth ranging from 500 and 2000 m between the north and the south of the study area .…”

Section: Geologymentioning

confidence: 99%

Geochemistry of groundwater in the Saint-Édouard area, Quebec, Canada, and its influence on the distribution of methane in shallow aquifers

Bordeleau

Rivard

Lavoie

et al. 2018

Applied Geochemistry

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“…5). The autochthonous Lotbinière Formation (Sainte-Rosalie Group) and the parautochthonous Les Fonds Formation (Sainte-Rosalie Group) are time-and facies correlative units of the Utica Shale (Lavoie et al, 2016) (Fig. 2).…”

Section: The Intermediate Zone (Caprock) and Reservoir Units Of The Smentioning

confidence: 99%

“…2). The Utica Shale, Lotbinière and Les Fonds formations display a similar lithofacies of black calcareous mudstone with thin beds of impure fine-grained limestone but differs by their organofacies (Lavoie et al, 2016).…”

Section: The Intermediate Zone (Caprock) and Reservoir Units Of The Smentioning

confidence: 99%

Defining the natural fracture network in a shale gas play and its cover succession: The case of the Utica Shale in eastern Canada

Ladevèze

Séjourné

Rivard

et al. 2018

Journal of Structural Geology

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In the St. Lawrence sedimentary platform (eastern Canada), very little data are available between shallow fresh water aquifers and deep geological hydrocarbon reservoir units (here referred to as the intermediate zone). Characterization of this intermediate zone is crucial, as the latter controls aquifer vulnerability to operations carried out at depth. In this paper, the natural fracture networks in shallow aquifers and in the Utica shale gas reservoir are documented in an attempt to indirectly characterize the intermediate zone. This study used structural data from outcrops, shallow observation well logs and deep shale gas well logs to propose a conceptual model of the natural fracture network. Shallow and deep fractures were categorized into three sets of steeplydipping fractures and into a set of bedding-parallel fractures. Some lithological and structural controls on fracture distribution were identified. The regional geologic history and similarities between the shallow and deep fracture datasets allowed the extrapolation of the fracture network characterization to the intermediate zone. This study thus highlights the benefits of using both datasets simultaneously, while they are generally interpreted separately. Recommendations are also proposed for future environmental assessment studies in which the existence of preferential flow pathways and potential upward fluid migration toward shallow aquifers need to be identified.

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The Upper Ordovician black shales of southern Quebec (Canada) and their significance for naturally occurring hydrocarbons in shallow groundwater

Cited by 32 publications

References 47 publications

In situ U–Pb analysis of shocked zircon from the Charlevoix impact structure, Québec, Canada

In situ U–Pb analysis of shocked zircon from the Charlevoix impact structure, Québec, Canada

Geochemistry of groundwater in the Saint-Édouard area, Quebec, Canada, and its influence on the distribution of methane in shallow aquifers

Defining the natural fracture network in a shale gas play and its cover succession: The case of the Utica Shale in eastern Canada

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