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Structural history and tectonics of the palaeozoic shoalwater and wandilla terranes, Northern New Nngland Orogen, Queensland

Journal Article


Abstract


  • The New England Orogen of coastal central Queensland contains the Wandilla terrane in the west and the Shoalwater terrane in the east and north. Both terranes underwent multiple deformation (D1-D4) and at least one main episode of prolonged metamorphism. The first deformation (D1) resulted from subduction accretion in a Devonian and Carboniferous forearc. Early subduction complex structures in the Wandilla terrane are dominated by steeply dipping melange with lenticular phacoids of tuff and greywacke in a mudstone matrix; whereas in the Shoalwater terrane strata are mainly coherent and the overall structure is inferred to comprise slices repeated by an imbricate thrust system. The second deformation (D2) is widespread in both terranes and formed a mostly subhorizontal to moderately east-dipping cleavage and tight to open F2folds. A strong down-dip stretching lineation was generated in the Wandilla terrane. F2folds and S0-S2relationships have a consistent geometry indicating an antiform to the east. Rotation of bedding, already steeply dipping due to subduction accretion, resulted in overturned strata that are typical of the Shoalwater terrane. D3and D4developed as a progressive sequence during the same general deformation as D2; this occurred in the Middle to Late Permian although farther west its effects continued into the Triassic. �� Taylor & Francis Ltd.

Publication Date


  • 1990

Citation


  • Fergusson, C. L., Henderson, R. A., & Leitch, E. C. (1990). Structural history and tectonics of the palaeozoic shoalwater and wandilla terranes, Northern New Nngland Orogen, Queensland. Australian Journal of Earth Sciences, 37(4), 387-400. doi:10.1080/08120099008727939

Scopus Eid


  • 2-s2.0-0025603487

Start Page


  • 387

End Page


  • 400

Volume


  • 37

Issue


  • 4

Place Of Publication


Abstract


  • The New England Orogen of coastal central Queensland contains the Wandilla terrane in the west and the Shoalwater terrane in the east and north. Both terranes underwent multiple deformation (D1-D4) and at least one main episode of prolonged metamorphism. The first deformation (D1) resulted from subduction accretion in a Devonian and Carboniferous forearc. Early subduction complex structures in the Wandilla terrane are dominated by steeply dipping melange with lenticular phacoids of tuff and greywacke in a mudstone matrix; whereas in the Shoalwater terrane strata are mainly coherent and the overall structure is inferred to comprise slices repeated by an imbricate thrust system. The second deformation (D2) is widespread in both terranes and formed a mostly subhorizontal to moderately east-dipping cleavage and tight to open F2folds. A strong down-dip stretching lineation was generated in the Wandilla terrane. F2folds and S0-S2relationships have a consistent geometry indicating an antiform to the east. Rotation of bedding, already steeply dipping due to subduction accretion, resulted in overturned strata that are typical of the Shoalwater terrane. D3and D4developed as a progressive sequence during the same general deformation as D2; this occurred in the Middle to Late Permian although farther west its effects continued into the Triassic. �� Taylor & Francis Ltd.

Publication Date


  • 1990

Citation


  • Fergusson, C. L., Henderson, R. A., & Leitch, E. C. (1990). Structural history and tectonics of the palaeozoic shoalwater and wandilla terranes, Northern New Nngland Orogen, Queensland. Australian Journal of Earth Sciences, 37(4), 387-400. doi:10.1080/08120099008727939

Scopus Eid


  • 2-s2.0-0025603487

Start Page


  • 387

End Page


  • 400

Volume


  • 37

Issue


  • 4

Place Of Publication