Cenozoic structural evolution of the Andaman Sea: Evolution from an extensional to a sheared margin
© 2016 The Author(s). Published by The Geological Society of London. The Andaman Sea is proposed to have developed from a margin where Palaeogene back-arc collapse closed a mid-Cretaceous back-arc oceanic basin, and resulted in the collision between island arc crust to the west and the western margi...
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th-cmuir.6653943832-556562018-09-05T03:02:50Z Cenozoic structural evolution of the Andaman Sea: Evolution from an extensional to a sheared margin C. K. Morley Earth and Planetary Sciences Engineering Environmental Science © 2016 The Author(s). Published by The Geological Society of London. The Andaman Sea is proposed to have developed from a margin where Palaeogene back-arc collapse closed a mid-Cretaceous back-arc oceanic basin, and resulted in the collision between island arc crust to the west and the western margin of Sundaland. Subsequent east- west to WNW-ESE extension during the Late Eocene-Oligocene resulted in highly extended continental crust underlying the Alcock and Sewell rises, and the East Andaman Basin, and moderately extended crust in the Megui-North Sumatra Basin. As India coupled with western Myanmar, the margin became dominated by dextral strike-slip and NNW-SSE transtensional deformation during the Miocene. The narrow belt of NNW -SSE-directed extension is proposed to have focused on the region where ductile middle crust remained following Late Eocene- Oligocene extension, whereas strike-slip faults are located in the regions of necking where ductile middle crust was considerably thinned by Late Eocene-Oligocene extension. The last phase of NNW-SSE-extension switched between probable Late Miocene-Early Pliocene seafloor spreading, and extension (by dyke intrusion and faulting) in the Alcock and Sewell rises, and then recently back to the spreading centre. 2018-09-05T02:59:21Z 2018-09-05T02:59:21Z 2016-01-01 Book Series 03058719 2-s2.0-85028299639 10.1144/SP431.1 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85028299639&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/55656 |
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Earth and Planetary Sciences Engineering Environmental Science C. K. Morley Cenozoic structural evolution of the Andaman Sea: Evolution from an extensional to a sheared margin |
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© 2016 The Author(s). Published by The Geological Society of London. The Andaman Sea is proposed to have developed from a margin where Palaeogene back-arc collapse closed a mid-Cretaceous back-arc oceanic basin, and resulted in the collision between island arc crust to the west and the western margin of Sundaland. Subsequent east- west to WNW-ESE extension during the Late Eocene-Oligocene resulted in highly extended continental crust underlying the Alcock and Sewell rises, and the East Andaman Basin, and moderately extended crust in the Megui-North Sumatra Basin. As India coupled with western Myanmar, the margin became dominated by dextral strike-slip and NNW-SSE transtensional deformation during the Miocene. The narrow belt of NNW -SSE-directed extension is proposed to have focused on the region where ductile middle crust remained following Late Eocene- Oligocene extension, whereas strike-slip faults are located in the regions of necking where ductile middle crust was considerably thinned by Late Eocene-Oligocene extension. The last phase of NNW-SSE-extension switched between probable Late Miocene-Early Pliocene seafloor spreading, and extension (by dyke intrusion and faulting) in the Alcock and Sewell rises, and then recently back to the spreading centre. |
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Book Series |
author |
C. K. Morley |
author_facet |
C. K. Morley |
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C. K. Morley |
title |
Cenozoic structural evolution of the Andaman Sea: Evolution from an extensional to a sheared margin |
title_short |
Cenozoic structural evolution of the Andaman Sea: Evolution from an extensional to a sheared margin |
title_full |
Cenozoic structural evolution of the Andaman Sea: Evolution from an extensional to a sheared margin |
title_fullStr |
Cenozoic structural evolution of the Andaman Sea: Evolution from an extensional to a sheared margin |
title_full_unstemmed |
Cenozoic structural evolution of the Andaman Sea: Evolution from an extensional to a sheared margin |
title_sort |
cenozoic structural evolution of the andaman sea: evolution from an extensional to a sheared margin |
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2018 |
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https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85028299639&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/55656 |
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