High-temperature fracturing and subsequent grain-size-sensitive creep in lower crustal gabbros: Evidence for coseismic loading followed by creep during decaying stress in the lower crust

• Published in: Journal of Geophysical Research: Solid Earth
• Main Authors: Okudaira, Takamoto, Jeřábek, Petr, Stunitz, Holger, Fusseis, Florian
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 2015
• Subjects: Hasvik; Norway; Northern Norway
• Online Access: https://hdl.handle.net/10037/24951; https://doi.org/10.1002/2014JB011708

The mechanism of shear zone formation in lower crustal, relatively “dry” rocks is still poorly understood. We have studied the high-temperature deformation of the Hasvik gabbro (northern Norway) which commences by fracturing. The 10–20 μm wide fractures show little displacement. The fine-grained pla...