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- Title
A Review of the Bentong-Raub Suture vis-à-vis New Insight of the Tectonic Evolution of Malay Peninsula, South East Asia.
- Authors
KHAN, Aftab Alam; SHUIB, Mustaffa Kamal
- Abstract
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.
- Subjects
MALAY Peninsula; SUTURE zones (Structural geology); GEOLOGIC faults; PLATE tectonics; PETROGENESIS; STRUCTURAL geology
- Publication
Acta Geologica Sinica (English Edition), 2016, Vol 90, Issue 5, p1865
- ISSN
1000-9515
- Publication type
Article
- DOI
10.1111/1755-6724.12822