Genesis of the so-called Bentong-Raub Suture of Malay Peninsula does not fit to the model of subduction-related collision.It has evolved from transpression tectonics resulting closure and exhumation of the inland basi...Genesis of the so-called Bentong-Raub Suture of Malay Peninsula does not fit to the model of subduction-related collision.It has evolved from transpression tectonics resulting closure and exhumation of the inland basin which underwent extensive back-arc extension during Triassic.Crust having similar thickness（average-35 km） below entire Malay Peninsula nagate collision of two separate continental blocks rather supports single continental block that collided with South China continental block during Permo-Triassic.Westward subduction of intervening sea（Proto South China Sea） below Malay Peninsula resulted in widespread I- and S-Type granitization and volcanism in the back-arc basins during Triassic.Extensive occurrence of Permo-Triassic Pahang volcanics of predominantly rhyolitic tuff suggest its derivation from back-arc extension.Back-arc extension,basin development and sedimentation of the central belt of the peninsula continued until Cretaceous.A-Type granite of metaluminous to peraluminous character indicates their emplacement in an intraplate tectonic setting.Malay Peninsula suffered an anticlockwise rotation due to the rifting of Luconia-Dangerous Grounds from the east Asia in the Late Cretaceous-Early Tertiary.Extensive ductile and brittle deformation including crustal segmentation,pull-apart fracturing and faulting occurred during the closure and exhumation of the basins developed in the peninsula during Late Cretaceous-Early Tertiary.Crustal shortening in the central belt of the peninsula has been accomodated through strike-slip displacement,shearing and uplift.展开更多
基金supported by the University Malaya Research Grant(UMRG) RP002A-13AFRthe support provided by the University of Malaya,Kuala Lumpur,Malaysia
文摘Genesis of the so-called Bentong-Raub Suture of Malay Peninsula does not fit to the model of subduction-related collision.It has evolved from transpression tectonics resulting closure and exhumation of the inland basin which underwent extensive back-arc extension during Triassic.Crust having similar thickness（average-35 km） below entire Malay Peninsula nagate collision of two separate continental blocks rather supports single continental block that collided with South China continental block during Permo-Triassic.Westward subduction of intervening sea（Proto South China Sea） below Malay Peninsula resulted in widespread I- and S-Type granitization and volcanism in the back-arc basins during Triassic.Extensive occurrence of Permo-Triassic Pahang volcanics of predominantly rhyolitic tuff suggest its derivation from back-arc extension.Back-arc extension,basin development and sedimentation of the central belt of the peninsula continued until Cretaceous.A-Type granite of metaluminous to peraluminous character indicates their emplacement in an intraplate tectonic setting.Malay Peninsula suffered an anticlockwise rotation due to the rifting of Luconia-Dangerous Grounds from the east Asia in the Late Cretaceous-Early Tertiary.Extensive ductile and brittle deformation including crustal segmentation,pull-apart fracturing and faulting occurred during the closure and exhumation of the basins developed in the peninsula during Late Cretaceous-Early Tertiary.Crustal shortening in the central belt of the peninsula has been accomodated through strike-slip displacement,shearing and uplift.
