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Kinematics and Timing of Brittle-Ductile Shearing of Mylonites along the Bok Bak Fault, Peninsular Malaysia


Affiliations
1 Department of Geology, University of Malaya, Kuala Lumpur 50603, Malaysia
 

Study on the Bok Bak fault in Peninsular Malaysia reveals it to be a predominantly dextral brittle–ductile strike slip fault zone. This fault zone is characterized by gentle to sub-horizontal NE stretching lineation. The deformation occurred in a brittle–ductile domain. 40Ar/39Ar radiometric dating of biotite from the mylonite assigns an age of 136.1 ± 1.4 Ma. This age is the first reported radiometric dating of the Bok Bak fault, suggesting that the fault affected Sundaland prior to the collision between India and Asia, and therefore indicates an early faulting in the Malay Peninsula.

Keywords

40Ar–39Ar Dating, Bok Bak Fault, Peninsular Malaysia, Sundaland, Strike Slip.
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  • Kinematics and Timing of Brittle-Ductile Shearing of Mylonites along the Bok Bak Fault, Peninsular Malaysia

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Authors

Ahmad Faiz Salmanfarsi
Department of Geology, University of Malaya, Kuala Lumpur 50603, Malaysia
Mustaffa Kamal Shuib
Department of Geology, University of Malaya, Kuala Lumpur 50603, Malaysia
Ng Tham Fatt
Department of Geology, University of Malaya, Kuala Lumpur 50603, Malaysia
Mohamad Tarmizi Mohamad Zulkifley
Department of Geology, University of Malaya, Kuala Lumpur 50603, Malaysia

Abstract


Study on the Bok Bak fault in Peninsular Malaysia reveals it to be a predominantly dextral brittle–ductile strike slip fault zone. This fault zone is characterized by gentle to sub-horizontal NE stretching lineation. The deformation occurred in a brittle–ductile domain. 40Ar/39Ar radiometric dating of biotite from the mylonite assigns an age of 136.1 ± 1.4 Ma. This age is the first reported radiometric dating of the Bok Bak fault, suggesting that the fault affected Sundaland prior to the collision between India and Asia, and therefore indicates an early faulting in the Malay Peninsula.

Keywords


40Ar–39Ar Dating, Bok Bak Fault, Peninsular Malaysia, Sundaland, Strike Slip.

References





DOI: https://doi.org/10.18520/cs%2Fv114%2Fi05%2F1110-1116