Accretionary Orogenesis: Now and Then - Daniel Viete
Автор: Virtual Seminars in Precambrian Geology
Загружено: 2025-04-29
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Accretionary Orogenesis: Now and Then
Daniel Viete
John Hopkins University
Within the modern plate tectonic framework, accretionary orogenesis is associated with number of fundamental geological features, including: (1) orogenic ophiolites; (2) Barrovian-type regional metamorphism; (3) rapid, syn-convergent sedimentation and basement development. This talk will consider the occurrence of some of these features in association with Phanerozoic accretionary orogens, focusing on the Appalachian–Caledonian Orogen. Comparison will be made with equivalent records and the timing and time scales of their occurrence during the Paleoproterozoic Penokean–Yavapai Orogen of the Lake Superior Area, North America.
The general conclusion is that uniformitarian approaches to studying Paleoproterozoic accretionary orogenesis are defensible, though there are unique aspects of the Circum-Superior (Penokean–Trans Hudson–Cape Smith–New Quebec) orogenic system that may warrant further investigation through the lens of secular change.
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