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Sedimentary facies analysis of a thin-bed-dominated turbidite succession in the Miocene temburong formation,Kampung Bebuloh,Labuan Island,Malaysia

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Journal of Palaeogeography 2024年第3期13卷 401-429页

作者： Farah Syafira Burhanuddin Meor Hakif Amir Hassan Department of Geology Faculty of ScienceUniversiti Malaya50603 Kuala LumpurMalaysia

Thin-bedded turbidites are important hydrocarbon-bearing reservoirs in many mature fields throughout the *** type of turbidite depositional setting strongly influences vertical and horizontal continuity of the ***,distinguishing between lobe and levee associated thin-bedded turbidites remains challenging due to their generally similar facies *** study aims to contribute some insights to this problem by conducting a detailed bed-scale facies analysis on the Early Miocene temburong formation exposed at Kampung Bebuloh,Labuan Island,Malaysia,which may uncover features that can help in differentiating between both depositional *** facies are recognized in the temburong formation,which are interpreted as low density turbidites(F1-F4),hybrid event beds(F5),and sustained turbidites(F6).Detailed facies and ichnology analysis reveal features which are consistent with a lobe fringe deposit rather than leveeassociated environment interpretation,including tabular bed geometries,presence of hybrid event beds,and the absence of thick-bedded channel-fill *** facies associations are identified and interpreted as representing sub-environments within an overall lobe depositional setting.A diverse trace fossil assemblage,comprising the Nereites ichnofacies is consistent with a deep marine *** identification of the Paleodictyon and Nereites sub-ichnofacies indicates a distal turbidite system setting,most likely lobe *** on the thick accumulation of FA2 and FA3 and no distinct observable vertical trend,the Early Miocene temburong formation in Labuan is interpreted as turbidites deposited at the fringes of lobe complexes rather than a single lobe *** works into the temburong formation in SW Labuan proposed a middle slope to proximal basin floor setting where the thin-bedded intervals were interpreted as potentially representing either levee deposits or the fringes of confined lobe ***

关键词： Facies analysis Trace fossils Depositional lobes Hybrid event beds Lobe fringe temburong formation Thin-bedded turbidite

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