Inherited structure and coupled crust‐mantle lithosphere evolution: Numerical models of Central Australia
Abstract Continents have a rich tectonic history that have left lasting crustal impressions. In analyzing Central Australian intraplate orogenesis, complex continental features make it difficult to identify the controls of inherited structure. Here the tectonics of two types of inherited structures...
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| Format: | Article |
| Language: | English |
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Wiley
2016-05-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1002/2016GL068562 |
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| author | Philip J. Heron Russell N. Pysklywec |
| author_facet | Philip J. Heron Russell N. Pysklywec |
| author_sort | Philip J. Heron |
| collection | DOAJ |
| description | Abstract Continents have a rich tectonic history that have left lasting crustal impressions. In analyzing Central Australian intraplate orogenesis, complex continental features make it difficult to identify the controls of inherited structure. Here the tectonics of two types of inherited structures (e.g., a thermally enhanced or a rheologically strengthened region) are compared in numerical simulations of continental compression with and without “glacial buzzsaw” erosion. We find that although both inherited structures produce deformation in the upper crust that is confined to areas where material contrasts, patterns of deformation in the deep lithosphere differ significantly. Furthermore, our models infer that glacial buzzsaw erosion has little impact at depth. This tectonic isolation of the mantle lithosphere from glacial processes may further assist in the identification of a controlling inherited structure in intraplate orogenesis. Our models are interpreted in the context of Central Australian tectonics (specifically the Petermann and Alice Springs orogenies). |
| format | Article |
| id | doaj-art-bc12f29b62a144098da001adf0b409a1 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2016-05-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-bc12f29b62a144098da001adf0b409a12025-08-20T03:49:37ZengWileyGeophysical Research Letters0094-82761944-80072016-05-0143104962497010.1002/2016GL068562Inherited structure and coupled crust‐mantle lithosphere evolution: Numerical models of Central AustraliaPhilip J. Heron0Russell N. Pysklywec1Department of Earth Sciences University of Toronto Toronto Ontario CanadaDepartment of Earth Sciences University of Toronto Toronto Ontario CanadaAbstract Continents have a rich tectonic history that have left lasting crustal impressions. In analyzing Central Australian intraplate orogenesis, complex continental features make it difficult to identify the controls of inherited structure. Here the tectonics of two types of inherited structures (e.g., a thermally enhanced or a rheologically strengthened region) are compared in numerical simulations of continental compression with and without “glacial buzzsaw” erosion. We find that although both inherited structures produce deformation in the upper crust that is confined to areas where material contrasts, patterns of deformation in the deep lithosphere differ significantly. Furthermore, our models infer that glacial buzzsaw erosion has little impact at depth. This tectonic isolation of the mantle lithosphere from glacial processes may further assist in the identification of a controlling inherited structure in intraplate orogenesis. Our models are interpreted in the context of Central Australian tectonics (specifically the Petermann and Alice Springs orogenies).https://doi.org/10.1002/2016GL068562inherited structureglacial buzzsawmantle lithosphereintraplate orogenesiscontinental shorteningCentral Australian tectonics |
| spellingShingle | Philip J. Heron Russell N. Pysklywec Inherited structure and coupled crust‐mantle lithosphere evolution: Numerical models of Central Australia Geophysical Research Letters inherited structure glacial buzzsaw mantle lithosphere intraplate orogenesis continental shortening Central Australian tectonics |
| title | Inherited structure and coupled crust‐mantle lithosphere evolution: Numerical models of Central Australia |
| title_full | Inherited structure and coupled crust‐mantle lithosphere evolution: Numerical models of Central Australia |
| title_fullStr | Inherited structure and coupled crust‐mantle lithosphere evolution: Numerical models of Central Australia |
| title_full_unstemmed | Inherited structure and coupled crust‐mantle lithosphere evolution: Numerical models of Central Australia |
| title_short | Inherited structure and coupled crust‐mantle lithosphere evolution: Numerical models of Central Australia |
| title_sort | inherited structure and coupled crust mantle lithosphere evolution numerical models of central australia |
| topic | inherited structure glacial buzzsaw mantle lithosphere intraplate orogenesis continental shortening Central Australian tectonics |
| url | https://doi.org/10.1002/2016GL068562 |
| work_keys_str_mv | AT philipjheron inheritedstructureandcoupledcrustmantlelithosphereevolutionnumericalmodelsofcentralaustralia AT russellnpysklywec inheritedstructureandcoupledcrustmantlelithosphereevolutionnumericalmodelsofcentralaustralia |