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- Title
Deformation styles and structural history of the Paleozoic limestone, Kinta Valley, Perak, Malaysia.
- Authors
CHOONG CHEE MENG; PUBELLIER, MANUEL; ABDELDAYEM, ABDELAZIZ; CHOW WENG SUM
- Abstract
The Paleozoic limestone of Kinta Valley formed a narrow deformed strip between the Late Triassic - Early Jurassic batholiths of the northern Peninsular Malaysia. Because of the advanced stage of karstification, it is difficult to understand the deformation events that affected the limestone. We use outcrop remote sensing mapping, outcrop examples and hand specimens to unravel the tectonic evolution from syn-sedimentary to Recent events. We identify (i.) an early extensional event marked by very penetrative micro-normal faults, possibly due to compaction underneath the sea bottom, which occurred when bedding was still horizontal, (ii.) an early compression indicated by a set of conjugate originally strike-slip faults, (iii.) a well-marked compression with thrusts and tight folds which tilted the previously formed structures, (iv.) ductile high temperature (HT) normal shear located near the contact with the granites, and (v.) late extensional event marked by subsequent large normal faults. We interpret the evolution as intra-basin extension during Permian-Triassic times followed by a continuum of high strain coeval with the late stages of granite emplacement including compression and gravitational extension on the edge of the intrusion. The late extension is undated but may be linked to the Tertiary basins formation of Malaysia or the Late Miocene to Quaternary uplift.
- Subjects
PERAK (Malaysia); ROCK deformation; PALEOZOIC Era; LIMESTONE; BATHOLITHS
- Publication
Bulletin of the Geological Society of Malaysia, 2016, Vol 62, p37
- ISSN
0126-6187
- Publication type
Article