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

Walsh Alec K. | Zendy; Hand Martin | Zendy; Kelsey David E. | Zendy

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

Author(s) -

Walsh Alec K.,

Hand Martin,

Kelsey David E.

Publication year - 2015

Publication title -

terra nova

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.353

H-Index - 89

eISSN - 1365-3121

pISSN - 0954-4879

DOI - 10.1111/ter.12164

Subject(s) - intraplate earthquake , foreland basin , geology , lithosphere , orogeny , craton , metamorphism , seismology , paleontology , tectonics

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 10 km of syn‐orogenic sedimentation in a basin approximately 70 km wide. The deep level of burial in the foreland of the intraplate orogen requires the involvement of weak lithosphere with an elastic thickness of ≤20 km. 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.

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