Seismic reflection images of high-angle faults and linked detachments in the Trans-Hudson Orogen
Article Abstract:
Seismic reflection data from the Trans-Hudson Orogen, Canada, show high-angle faults in the upper crust and low-angle ductile shearing in the rest of the crust. The folding and southwestern fault wedges extrusion are present only in the upper crust. The series of orogen-parallel faults and folds are linked to postcollisional intracontinental deformation. There is a kinematic relation between the high-angle fault/fold structures and low-angle detachment shear zones. The faults in the upper crust produced southwest extrusion of the inner part of the orogen.
Publication Name: Tectonics
Subject: Earth sciences
ISSN: 0278-7407
Year: 1996
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Geodynamic evolution and thermal history of the central Flin Flon domain, Trans-Hudson Orogen: constraints from structural development, Ar(super 40)/Ar(super 39), and stable isotope geothermometry
Article Abstract:
Structural analysis using argon isotopes on shear zones in the Flin Flon area in Canada indicate five stages of development. The collision between the Archean Rae-Hearne and Archean Superior plates during the Trans-Hudson Orogeny resulted in deformations. The geodynamic evolution involved a transformation from island arc supracrustal development to tectonic mountain building under brittle-ductile conditions, and the metamorphosis took place in three stages.
Publication Name: Tectonics
Subject: Earth sciences
ISSN: 0278-7407
Year: 1995
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Paleoproterozoic (1.90-1.86 Ga) arc volcanism in the Flin Flon belt, Trans-Hudson Orogen, Canada
Article Abstract:
A study of geochemical and isotopic data of rocks shows that they can be subdivided into tholeiitic, calc-alkaline, alkaline and boninitic magma series. The samples are of Paleoproterozoic, mafic-intermediate and arc metavolcanic rocks from Flin Flon greenstone belt, Trans-Hudson Orogen, Canada. The results of this study are very useful in knowing the origin and evolution of volcanoes. The methods used in the study and results are discussed in detail.
Publication Name: Contributions to Mineralogy and Petrology
Subject: Earth sciences
ISSN: 0010-7999
Year: 1995
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