TY - JOUR
T1 - Tectonic setting of late Archean bimodel volcanism in the Michipicoten ( Wawa) greenstone belt, Ontario ( Canada).
AU - Sylvester, P. J.
AU - Attoh, K.
AU - Schulz, K. J.
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 1987
Y1 - 1987
N2 - The tectono-stratigraphic relationships, depositional environments, rock associations, and major- and trace-element compositions of the late Archean (2744-2696 Ma) bimodal basalt-rhyolite volcanic rocks of the Michipicoten (Wawa) greenstone belt, Ontario, are compatible with an origin along a convergent plate margin that varied laterally from an immature island arc built on oceanic crust to a more mature arc underlain by continental crust. This environment is similar to that of the Cenozoic Taupo-Kermadec-Tonga volcanic zone. The compositional similarity between the lower (2744 Ma) and upper (2696 Ma) volcanic sequences of the belt suggests that this island- and continental-arc configuration existed for at least 45 Ma. The Michipicoten belt may be a remnant of a larger, laterally heterogeneous volcanic terrane that also included the Abitibi greenstone belt.-from Authors
AB - The tectono-stratigraphic relationships, depositional environments, rock associations, and major- and trace-element compositions of the late Archean (2744-2696 Ma) bimodal basalt-rhyolite volcanic rocks of the Michipicoten (Wawa) greenstone belt, Ontario, are compatible with an origin along a convergent plate margin that varied laterally from an immature island arc built on oceanic crust to a more mature arc underlain by continental crust. This environment is similar to that of the Cenozoic Taupo-Kermadec-Tonga volcanic zone. The compositional similarity between the lower (2744 Ma) and upper (2696 Ma) volcanic sequences of the belt suggests that this island- and continental-arc configuration existed for at least 45 Ma. The Michipicoten belt may be a remnant of a larger, laterally heterogeneous volcanic terrane that also included the Abitibi greenstone belt.-from Authors
UR - http://www.scopus.com/inward/record.url?scp=0023468189&partnerID=8YFLogxK
U2 - 10.1139/e87-109
DO - 10.1139/e87-109
M3 - Article
AN - SCOPUS:0023468189
VL - 24
SP - 1120
EP - 1134
JO - Canadian Journal of Earth Sciences
JF - Canadian Journal of Earth Sciences
SN - 0008-4077
IS - 6
ER -