Zircon U-Pb ages of the benom complex: Implications for a late triassic uplift event in Central Peninsular Malaysia

Meng, C.C. and Pubellier, M. and Sautter, B. and Beg, M.A. (2021) Zircon U-Pb ages of the benom complex: Implications for a late triassic uplift event in Central Peninsular Malaysia. Bulletin of the Geological Society of Malaysia, 72. pp. 1-13. ISSN 01266187

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Abstract

The Benom Complex, located in the Central Belt of Peninsular Malaysia, has recorded the dynamics of the orogeny with multiple igneous intrusions emplaced during the late tectono-magmatic stages of the Paleo-Tethys closure. Three new zircon U-Pb ages of igneous rocks from the Benom Complex reveal the crystallization of diorite and syenite (alkaline series) at 221.8±2.4 Ma and 226.6±3.5 Ma respectively, and granite (calc-alkaline series) at 207.2±2.0 Ma. The sedimentation of the Central Belt shifted from a marine to a terrestrial environment at the Middle-Late Triassic boundary, which marked the beginning of uplift due to the Sibumasu-Indochina collision. The emplacement of alkaline series of Benom Complex during the early Late Triassic (226.6 Ma to 221.8 Ma) are interpreted as related to a slab break off and mantle upwelling. Most of the Central Belt region has no records of sedimentation since the mid Late Triassic due to continuous uplift and/or erosion. The subsequent emplacement of the Gunung Benom granite (calc-alkaline series) took place at the end of the Triassic (207.2 Ma). The red bed deposition and the emplacement of the Benom Complex (together with S-type Main Range granite) result from a continuous Late Triassic orogenic uplift event in Peninsular Malaysia. © 2021 by the Author(s).

Item Type: Article
Additional Information: cited By 4
Depositing User: Mr Ahmad Suhairi UTP
Date Deposited: 10 Nov 2023 03:28
Last Modified: 10 Nov 2023 03:28
URI: https://khub.utp.edu.my/scholars/id/eprint/14273

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