气候变化领域集成服务门户(CCPortal): Sequence biostratigraphic framework for the Oligocene to Pliocene of Malaysia: High-frequency depositional cycles driven by polar glaciation

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DOI	10.1016/j.palaeo.2020.110058
	Sequence biostratigraphic framework for the Oligocene to Pliocene of Malaysia: High-frequency depositional cycles driven by polar glaciation
	Morley R.J.; Hasan S.S.; Morley H.P.; Jais J.H.M.; Mansor A.; Aripin M.R.; Nordin M.H.; Rohaizar M.H.
发表日期	2021
ISSN	0031-0182
卷号	561
英文摘要	This paper reviews quantitative biostratigraphic data from 101 petroleum exploration wells from the Malay, Sarawak and Sabah basins, and places the stratigraphy of each area into a precise chronostratigraphic framework comprising 41 transgressive-regressive depositional packages which are fully defined here. Each package is ‘fingerprinted’ by foraminiferal, nannofossil and palynological index fossils, and then tied to the global pattern of glacio-eustatic sea level and climate changes based on the global δ18O and δ13C datasets used to calibrate the geological timescale. The result is a tightly constrained chronostratigraphic framework that is applicable from deep to shallow water and is of high accuracy. It is concluded that there is a sedimentation ‘pulsebeat’ across Southeast Asia, independent of local and regional tectonics, driven by patterns of global climate change. For the Oligocene and Miocene, Antarctic glaciation is the key driver, whereas the Pliocene cycles are mainly driven by the expansion and contraction of Northern Hemisphere glaciers. The new chronostratigraphic framework allows unconformities across Malaysia to be better characterised, and the different classification schemes of seismic “Groups” in Malay and Penyu basins, “Cycles” in offshore Sarawak and “Stages” in offshore western Sabah to be correlated. Also, with a clear understanding of the effect of fluctuating sea levels on the stratigraphy of the region, it is easier to make firm judgments regarding the effect of tectonics. The study also characterises systems tracts from shelf to basin floor using biostatigraphic assemblages, which should help in ground-truthing the architecture of depositional sequences in the region based on seismic. The new framework is proposed as an alternative to the outdated TB scheme of Haq et al. (1988), widely used to interpret depositional cycles across Sarawak and Sabah. © 2020 The Authors
英文关键词	Cenozoic sea-level curve; Glacio-eustasy; Malay Basin seismic groups; Sabah Stages; Sarawak Cycles; Systems-tracts; Unconformities
语种	英语
scopus关键词	biostratigraphy; chronostratigraphy; depositional environment; fossil record; glaciation; glacioeustacy; hydrocarbon exploration; nanofossil; Northern Hemisphere; Oligocene; palynology; Pliocene; sea level change; sequence stratigraphy; shallow water; East Malaysia; Malaysia; Sabah; Sarawak
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150253
作者单位	Palynova UK, Littleport, United Kingdom; PETRONAS MPM, KLCC, Kuala Lumpur, Malaysia
推荐引用方式 GB/T 7714	Morley R.J.,Hasan S.S.,Morley H.P.,et al. Sequence biostratigraphic framework for the Oligocene to Pliocene of Malaysia: High-frequency depositional cycles driven by polar glaciation[J],2021,561.
APA	Morley R.J..,Hasan S.S..,Morley H.P..,Jais J.H.M..,Mansor A..,...&Rohaizar M.H..(2021).Sequence biostratigraphic framework for the Oligocene to Pliocene of Malaysia: High-frequency depositional cycles driven by polar glaciation.Palaeogeography, Palaeoclimatology, Palaeoecology,561.
MLA	Morley R.J.,et al."Sequence biostratigraphic framework for the Oligocene to Pliocene of Malaysia: High-frequency depositional cycles driven by polar glaciation".Palaeogeography, Palaeoclimatology, Palaeoecology 561(2021).