La formation de Hauy a l ouest de Chapais volcanisme sub-aerien en milieu fluviatile

Piché, Mathieu

doi:10.1522/1465546

Cited by 2 publications

(2 citation statements)

References 6 publications

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“…2714-2718 Ma (Krogh, 1982;Pilote et al, 1997) (Krogh, 1982;Pilote et al, 1997) (Krogh, 1982;Pilote et al, 1997)Chibougamau Pluton (Krogh, 1982;Mathieu and Racicot, 2019;Pilote et al, 1997) that is genetically related to Cu-Au porphyry-style mineralization (Pilote et al, 1997). Syntectonic magmatism may be coeval with the sedimentary deposits of the Opémisca Group (Figure 1), including syn-sedimentary shoshonitic lava flows observed in the Haüy Formation (Piché, 1985). Other intrusive bodies, such as the granodioritic Chevrillon Pluton and the syenitic Saussure Pluton, intrude the Opémisca Group and likely formed late during the syntectonic period (Figure 1).…”

Section: Geological Settingmentioning

confidence: 99%

Physico-chemical parameters of Neoarchean syntectonic magmatism: The example of the Muscocho Pluton, Abitibi Subprovince

Mathieu

Madon

Hamilton

2020

Ore Geology Reviews

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Section: Geological Settingmentioning

confidence: 99%

Physico-chemical parameters of Neoarchean syntectonic magmatism: The example of the Muscocho Pluton, Abitibi Subprovince

Mathieu

Madon

Hamilton

2020

Ore Geology Reviews

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“…Magmatism, in the syntectonic period, may postdate or may be coeval with the main sedimentary deposits (Figure 3). Only the shoshonitic lava flows observed in the Haüy Formation of the Opémisca Group (Table 1) are clearly synsedimentary units (Piché, 1985). Other plutons intrude the Roy and Opémisca groups (e.g., Muscocho and Chevrillon plutons; Figure 1).…”

Section: Geological Settingmentioning

confidence: 99%

Deep Into the Chibougamau Area, Abitibi Greenstone Belt: Structure of a Neoarchean Crust Revealed by Seismic Reflection Profiling

et al. 2020

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Copper‐gold magmatic‐hydrothermal systems dominate in the Chibougamau area of the Neoarchean Abitibi subprovince (greenstone belt) of the Superior Province (craton), whereas orogenic gold mineralization is more common in the rest of the Abitibi. Understanding differences in metal endowment within the Abitibi greenstone belt requires insights into the geodynamic evolution of the Chibougamau area. This was addressed by imaging the crust using seismic reflection profiling acquired as part of the Metal Earth project. Seismic reflection sections display shallowly south‐dipping reflectors located within the upper crust (e.g., a possible deep continuation of the Barlow fault) and a northward‐dipping midcrust imbricated with older crust (Opatica subprovince) to the north. Multiple reflectors characterize the upper part of the midcrust, interpreted as faults superimposed on a major lithological boundary. These structures likely formed during terrane accretion prior to craton stabilization. Combining the new seismic data with known stratigraphic, structural, and magmatic records, we propose that the study area was initially a normal (i.e., thick) Archean oceanic crust that formed at or before 2.80 Ga and that evolved through terrane imbrication at 2.73–2.70 Ga. Shortening caused rapid burial, devolatilization, and partial melting of hydrated mafic rocks to produce tonalite magmas that may have mixed with mantle‐derived melts to produce the diorite‐tonalite suite associated with observed Cu‐Au magmatic‐hydrothermal mineralization.

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La formation de Hauy a l ouest de Chapais volcanisme sub-aerien en milieu fluviatile

Cited by 2 publications

References 6 publications

Physico-chemical parameters of Neoarchean syntectonic magmatism: The example of the Muscocho Pluton, Abitibi Subprovince

Physico-chemical parameters of Neoarchean syntectonic magmatism: The example of the Muscocho Pluton, Abitibi Subprovince

Deep Into the Chibougamau Area, Abitibi Greenstone Belt: Structure of a Neoarchean Crust Revealed by Seismic Reflection Profiling

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