Deformation of accretionary wedges in response to seamount subduction: Insights from sandbox experiments
Article Abstract:
Sandbox experiments have been used to study the structural evolution of the overriding plate margin in response to seamount subduction. This research has made it possible to identify the main morphologic features induced by seamount subduction. The accretionary wedge is indented, with a large reentrant develop being linked with a critical frontal slope. Seaward dipping back thrusts and conjugated strike-slip faults propagate landward as the seamount subduct. It is suggested that the underplating of large volumes of quite undeformed, water-laden sediments beneath the rear part of the margin could lead to local variation of pore fluid pressure in the wake of the seamount.
Publication Name: Tectonics
Subject: Earth sciences
ISSN: 0278-7407
Year: 2000
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Geology of the Hazelton volcanic belt in British Columbia: implications for the early to middle Jurassic evolution of Stikinia
Article Abstract:
The Hazelton volcanic belt was deposited on the Stikine Terrane of the Canadian Cordillera. The belt was formed by Early to Middle Jurassic volcanic and sedimentary succession on the terrane, also known as Stikinia, which extends around 300 km in distance. Stikinia was an 800-km-wide microplate on which island arcs developed. Stikinia was not part of the Intermontane Terrane when Hazelton belt was in its deposition stage. Instead, it was part of an oceanic microplate accreted to terranes in its identified period.
Publication Name: Tectonics
Subject: Earth sciences
ISSN: 0278-7407
Year: 1992
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