Lithological Facies Analysis And Sedimentology Of Semanggol Formation, West Malaysia

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dc.contributor.authorAlias, Nabilah
dc.date.accessioned2018-02-02T07:11:59Z
dc.date.available2018-02-02T07:11:59Z
dc.date.issued2017-03
dc.description.abstractPermian-Triassic Semanggol Formation is widely distributed in north Kedah, south Kedah and north Perak, West Malaysia. However, its facies analysis and sedimentology are still poor in the previous literatures. No regional correlations of the formation among the three localities. In addition, the possible existence of the Permian-Triassic Boundary (PTB) in this formation was not discussed before. Therefore, several outcrops of the Semanggol Formation in the three regions were subjected to detailed facies, petrographic and mineralogical analyses to establish a regional correlation of Semanggol Formation in three areas discuss the sedimentology and depositional environment of various facies in the formation and examine the possible existence of PTB in the formation. Facies analysis shows similarities in stratigraphic and lithological characteristics of the Permian to early Triassic in north and south Kedah where black mudstone, interbedded sandstone and mudstone, tuffaceous beds, bedded chert and siliceous shale facies have been identified. A turbidites sequence that is composed of conglomerates, sandstone, mudstonesandstone intercalations and black shales was reported in north Kedah as well as north Perak. Based on these facies distributions, the regional correlations of the Semanggol Formation in the studied three areas suggested a classification of the Semanggol Formation into the Lower Member, Middle Member and Upper Member. The Lower member of Semanggol Formation is represented by the black mudstone, interbedded sandstone and mudstone, tuffaceous beds, bedded chert and siliceous shale facies that are interpreted as deep marine environment. The Middle Member is composed of the conglomerates, sandstone, mudstone-sandstone intercalations and black shales and interpreted as turbidite sequence. The Upper Member comprises of varies types of sandstone facies that are considered as shallow marine environment. The relative sea level changes in Semanggol Formation is represented by two major high stands events, referring to the deposition of Triassic chert and black shale in that consistent to global sea level pattern during Triassic. Possible PTB in Semanggol Formation from Permian to Triassic is supported with the abundance of tuffaceous rocks especially in Pokok Pauh, north Kedah and Bukit Kukus, south Kedah that suggested global volcanism that obliterate and caused a discontinuity in the stratigraphic sequence.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/5487
dc.language.isoenen_US
dc.publisherUniversiti Sains Malaysiaen_US
dc.subjectLithological facies analysis and Sedimentologyen_US
dc.subjectof semanggol formation, West malaysiaen_US
dc.titleLithological Facies Analysis And Sedimentology Of Semanggol Formation, West Malaysiaen_US
dc.typeThesisen_US
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