气候变化领域集成服务门户(CCPortal): Timing and causes of the mid-Cretaceous global plate reorganization event

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DOI	10.1016/j.epsl.2020.116071
	Timing and causes of the mid-Cretaceous global plate reorganization event
	Olierook H.K.H.; Jourdan F.; Whittaker J.M.; Merle R.E.; Jiang Q.; Pourteau A.; Doucet L.S.
发表日期	2020
ISSN	0012821X
卷号	534
英文摘要	Global plate reorganization events (GPREs) can have profound impact on plate velocities, climate and the biotic cycle but the timing and triggers for GPREs remain debated. The timing and causes of the mid-Cretaceous GPRE, one of only two GPREs since the breakup of Pangea, remains poorly constrained because it occurred during the Cretaceous Normal Superchron. Here, we provide a new plagioclase 40Ar/39Ar age of 103.82±0.54 Ma (2σ) at DSDP site 256 along the world's clearest curved fracture zones in the Wharton Basin, off NW Australia. Using Monte Carlo simulations, we compute that the mid-Cretaceous GPRE commenced at 111.2−1.2 +1.3 Ma (95% confidence). The mid-Cretaceous GPRE was associated with a significant plate deceleration (minimum ∼26%), similar to the Eocene GPRE, implying that this process is fundamental to plate reconfigurations. We propose that the mid-Cretaceous GPRE was caused by slab-breakoff and cessation of the south-dipping subduction zone in the Mesotethys Ocean at ca. 111 Ma. Ultimately, we posit that subduction zone initiations and cessations are the primary triggers for both post-Pangean GPREs and that top-down processes may be the fundamental drivers for GPREs. © 2020 Elsevier B.V.
关键词	40Ar/39Ar geochronology eastern Gondwana Neotethys slab pull subduction Wharton Basin
英文关键词	Feldspar; Geochronology; Intelligent systems; Timing circuits; eastern Gondwana; Neotethys; Slab pull; subduction; Wharton Basin; Monte Carlo methods; argon-argon dating; continental breakup; Cretaceous; Gondwana; slab; subduction zone; Tethys; Australia; Indian Ocean; Wharton Basin
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202817
作者单位	School of Earth and Planetary Sciences, Curtin University, GPO Box U1987, Perth, WA 6845, Australia; John de Laeter Centre, Curtin University, GPO Box U1987, Perth, WA 6845, Australia; Centre for Exploration Targeting – Curtin Node, Curtin University, GPO Box U1987, Perth, WA 6845, Australia; Western Australian Argon Isotope Facility, Curtin University, GPO Box U1987, Perth, WA 6845, Australia; Institute for Marine and Antarctic Studies, University of Tasmania, Private Bag 129, Hobart, Tasmania 7001, Australia; Swedish Museum of Natural History, Stockholm, S-104 05, Sweden; Earth Dynamics Research Group, ARC Centre of Excellence for Core to Crust Fluid Systems (CCFS), Curtin University, GPO Box U1987, Perth, WA 6845, Australia
推荐引用方式 GB/T 7714	Olierook H.K.H.,Jourdan F.,Whittaker J.M.,et al. Timing and causes of the mid-Cretaceous global plate reorganization event[J],2020,534.
APA	Olierook H.K.H..,Jourdan F..,Whittaker J.M..,Merle R.E..,Jiang Q..,...&Doucet L.S..(2020).Timing and causes of the mid-Cretaceous global plate reorganization event.Earth and Planetary Science Letters,534.
MLA	Olierook H.K.H.,et al."Timing and causes of the mid-Cretaceous global plate reorganization event".Earth and Planetary Science Letters 534(2020).