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Structural geology and tectonic history of the Taku Schist and surrounding units, NE Peninsular Malaysia / Muhammad Afiq Md Ali

Recent studies in SE Asia have focused on extensional detachments following the Indosinian Orogeny, which have not as yet been described in Peninsular Malaysia. In this context, the study demonstrates the structural evolution of the Taku Schist with emphasis on kinematics of shear deformation by way...

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Main Author: Muhammad Afiq , Md Ali
Format: Thesis
Published: 2018
Subjects:
QE Geology
Online Access:http://studentsrepo.um.edu.my/9414/1/Muhammad_Afiq_Md_Ali.pdf
http://studentsrepo.um.edu.my/9414/8/m.afiq.pdf
http://studentsrepo.um.edu.my/9414/
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spelling my.um.stud.94142021-04-08T00:35:44Z Structural geology and tectonic history of the Taku Schist and surrounding units, NE Peninsular Malaysia / Muhammad Afiq Md Ali Muhammad Afiq , Md Ali QE Geology Recent studies in SE Asia have focused on extensional detachments following the Indosinian Orogeny, which have not as yet been described in Peninsular Malaysia. In this context, the study demonstrates the structural evolution of the Taku Schist with emphasis on kinematics of shear deformation by way of field and microstructural observations to explain the regional tectonic evolution of NE Peninsular Malaysia. The Taku schist represents an original Paleozoic sedimentary succession metamorphosed to amphibolite facies during Indosinian Orogeny. This is indicated by an episode of burial and metamorphism (D1), followed by top-WSW directed flattening (D2) and lastly by upright folding (D3). The overall orogenic structure by E-W directed contraction is in agreement with the evolution of continental subduction and the collision of Sibumasu and Indochina during Permo-Triassic times. For the first time, a top-SE directed shear deformation (D4) was documented, resulting in the formation of a core complex and a large-scale extensional detachment. The observed low-angle mylonitic detachment shearing is accommodated by later normal and strike-slip faulting, which forms a major NNW-SSE trending fault zone. The deformation is accompanied by greenschist-facies retrograde metamorphism, synchronous with the major exhumation of the Taku Schist and other footwall units. This includes the Stong Complex, Kemahang Granite and the Tiang Schist, separated from the Gua Musang hanging-wall by a similar top-SE detachment mechanism. The syn-kinematic intrusion of the high temperature Stong Complex during top-SE shearing and formation of young sedimentary basins in the hanging-wall indicate that the post-orogenic extension and concurrent exhumation likely occurred during Late Cretaceous – Eocene time. 2018 Thesis NonPeerReviewed application/pdf http://studentsrepo.um.edu.my/9414/1/Muhammad_Afiq_Md_Ali.pdf application/pdf http://studentsrepo.um.edu.my/9414/8/m.afiq.pdf Muhammad Afiq , Md Ali (2018) Structural geology and tectonic history of the Taku Schist and surrounding units, NE Peninsular Malaysia / Muhammad Afiq Md Ali. Masters thesis, University of Malaya. http://studentsrepo.um.edu.my/9414/
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Student Repository
url_provider http://studentsrepo.um.edu.my/
topic QE Geology
spellingShingle QE Geology
Muhammad Afiq , Md Ali
Structural geology and tectonic history of the Taku Schist and surrounding units, NE Peninsular Malaysia / Muhammad Afiq Md Ali
description Recent studies in SE Asia have focused on extensional detachments following the Indosinian Orogeny, which have not as yet been described in Peninsular Malaysia. In this context, the study demonstrates the structural evolution of the Taku Schist with emphasis on kinematics of shear deformation by way of field and microstructural observations to explain the regional tectonic evolution of NE Peninsular Malaysia. The Taku schist represents an original Paleozoic sedimentary succession metamorphosed to amphibolite facies during Indosinian Orogeny. This is indicated by an episode of burial and metamorphism (D1), followed by top-WSW directed flattening (D2) and lastly by upright folding (D3). The overall orogenic structure by E-W directed contraction is in agreement with the evolution of continental subduction and the collision of Sibumasu and Indochina during Permo-Triassic times. For the first time, a top-SE directed shear deformation (D4) was documented, resulting in the formation of a core complex and a large-scale extensional detachment. The observed low-angle mylonitic detachment shearing is accommodated by later normal and strike-slip faulting, which forms a major NNW-SSE trending fault zone. The deformation is accompanied by greenschist-facies retrograde metamorphism, synchronous with the major exhumation of the Taku Schist and other footwall units. This includes the Stong Complex, Kemahang Granite and the Tiang Schist, separated from the Gua Musang hanging-wall by a similar top-SE detachment mechanism. The syn-kinematic intrusion of the high temperature Stong Complex during top-SE shearing and formation of young sedimentary basins in the hanging-wall indicate that the post-orogenic extension and concurrent exhumation likely occurred during Late Cretaceous – Eocene time.
format Thesis
author Muhammad Afiq , Md Ali
author_facet Muhammad Afiq , Md Ali
author_sort Muhammad Afiq , Md Ali
title Structural geology and tectonic history of the Taku Schist and surrounding units, NE Peninsular Malaysia / Muhammad Afiq Md Ali
title_short Structural geology and tectonic history of the Taku Schist and surrounding units, NE Peninsular Malaysia / Muhammad Afiq Md Ali
title_full Structural geology and tectonic history of the Taku Schist and surrounding units, NE Peninsular Malaysia / Muhammad Afiq Md Ali
title_fullStr Structural geology and tectonic history of the Taku Schist and surrounding units, NE Peninsular Malaysia / Muhammad Afiq Md Ali
title_full_unstemmed Structural geology and tectonic history of the Taku Schist and surrounding units, NE Peninsular Malaysia / Muhammad Afiq Md Ali
title_sort structural geology and tectonic history of the taku schist and surrounding units, ne peninsular malaysia / muhammad afiq md ali
publishDate 2018
url http://studentsrepo.um.edu.my/9414/1/Muhammad_Afiq_Md_Ali.pdf
http://studentsrepo.um.edu.my/9414/8/m.afiq.pdf
http://studentsrepo.um.edu.my/9414/
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score 13.211869

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