Characterization of transpressive deformation in shear zones of the Archean North Caribou greenstone belt (NW Superior Province) and the relationship with regional metamorphism

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• 作者：É ; milie Gagnon^a ; David A. Schneider^a ; ^{david.schneider@uottawa.ca} ; Tash Kalbfleisch^a ; Gerlinde Habler^b ; John Biczok^c ; ¹
• 关键词：EBSD ; Superior Province ; Shear zones ; Metamorphism ; Transpression
• 刊名：Tectonophysics
• 出版年：2016
• 出版时间：14 December 2016
• 年：2016
• 卷：693
• 期：part_PB
• 页码：261-276
• 全文大小：3642 K
• 卷排序：693

文摘

Compilations of microstructural data suggest that the DSZ formed under amphibolite grade conditions, likely between 500-600 °C. Microstructures and field/petrographic observations suggest transpression in the NCGB (horizontal shortening and shearing components). Although vertical movement could be suspected (dome and keel geometry), linear fabrics and dominant dextral kinematics in shear zones indicate otherwise. Deformation zones in the NCGB were formed under amphibolite grade conditions in a transpressional setting.