A metamorphic perspective on foreland flexure during intraplate orogeny: evidence for the involvement of weak lithosphere

作者：Walsh Alec K^*; Hand Martin; Kelsey David E

来源：Terra Nova, 2015, 27(5): 329-337.

DOI：10.1111/ter.12164

Constraining depth-temperature conditions of syn-orogenic burial metamorphism of syn-orogenic sediments in a foreland basin provides an innovative way to investigate the thermomechanical state of the lithosphere. In central Australia, major intraplate deformation resulted in 10km of syn-orogenic sedimentation in a basin approximately 70km wide. The deep level of burial in the foreland of the intraplate orogen requires the involvement of weak lithosphere with an elastic thickness of 20km. The profound flexural response of the foreland region indicates that major intraplate deformation in central Australia was localised into a region of dramatically weakened lithosphere.

• 出版日期2015-10