scholarly journals Age constraints on the evolution of the Quetico Belt, Superior Province, Ontario

1988 ◽  
Author(s):  
J A Percival ◽  
R W Sullivan
Keyword(s):  
Superior Province ◽  
Age Constraints

Onaping fault system: age constraints on deformation of the Kapuskasing structural zone and units underlying the Sudbury Structure

1994 ◽  
Vol 31 (7) ◽  
pp. 1197-1205 ◽  
Author(s):  
Kenneth L. Buchan ◽  
Richard E. Ernst
Keyword(s):  
Fault System ◽  
Dyke Swarm ◽  
Superior Province ◽  
Time Marker ◽  
Aeromagnetic Anomalies ◽  
Gneiss Complex ◽  
Sudbury Structure ◽  
Important Time ◽  
Lateral Offset ◽  
Age Constraints

The deformation of the Matachewan dyke swarm of the Superior Province, which includes a 60 km right-lateral offset and moderate uplift localized along the Kapuskasing structural zone, represents an important time marker in the evolution of the zone. However, the age of this deformation is poorly constrained. Here, it is shown that the prominent Mattagami River – Upper Wanapitei River fault of the Onaping fault system, which offsets 2167 Ma Biscotasing dykes south of the Kapuskasing structural zone, can be aligned with a fault of similar offset north of the zone after the Matachewan swarm is restored to its predeformational configuration. Thus, the deformation of the Matachewan swarm in the vicinity of the Kapuskasing structural zone must postdate the 2167 Ma emplacement and the subsequent faulting of the Biscotasing dykes. Southward extensions of faults of the Onaping fault system appear to offset aeromagnetic anomalies associated with highly magnetic units in the basement beneath the Sudbury Structure and Huronian sediments of the Southern Province, but do not substantially offset the Sudbury Structure itself. This suggests that the 1850 Ma Sudbury Structure was emplaced after most of the displacement on Onaping faults, while the unit underlying it, variously interpreted as the Archean Levack Gneiss Complex or a hidden ultramafic body of unknown age, predates Onaping faulting.

NEW RE-OS AND U-PB AGE CONSTRAINTS FOR THE BIOLOGICAL INNOVATIONS AND GEOCHEMICAL AND CLIMATIC PERTURBATIONS OF THE NEOPROTEROZOIC

2017 ◽  
Author(s):  
Alan D. Rooney ◽  
◽  
Justin V. Strauss ◽  
Phoebe Cohen ◽  
Daniel Condon ◽  
...  
Keyword(s):  
Age Constraints ◽  
Biological Innovations

GARNET SM-ND AGE CONSTRAINTS ON GRANULITE METAMORPHISM IN THE LOWER CRUST OF THE FIORDLAND MAGMATIC ARC, NEW ZEALAND

2018 ◽  
Author(s):  
Ryan L. Rogers ◽  
◽  
James W. Yelverton ◽  
Harold H. Stowell ◽  
Elizabeth M. Bollen ◽  
...  
Keyword(s):  
New Zealand ◽  
Lower Crust ◽  
Magmatic Arc ◽  
Granulite Metamorphism ◽  
Age Constraints
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