气候变化领域集成服务门户(CCPortal): Integrated cyclostratigraphy of the Cau core (SE Spain) - A timescale for climate change during the early Aptian Anoxic Event (OAE 1a) and the late Aptian

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DOI	10.1016/j.gloplacha.2024.104361
	Integrated cyclostratigraphy of the Cau core (SE Spain) - A timescale for climate change during the early Aptian Anoxic Event (OAE 1a) and the late Aptian
	Martinez-Rodriguez, Rafael; Batenburg, Sietske J.; Castro, Jose M.; de Gea, Gines A.; Nieto, Luis M.; Ruiz-Ortiz, Pedro A.; Robinson, Stuart
发表日期	2024
ISSN	0921-8181
EISSN	1872-6364
起始页码	233
卷号	233
英文摘要	We report a cyclostratigraphic study performed on the Cau core (Spain), which is considered an Aptian stratigraphic reference for global correlation and paleoenvironmental reconstruction. This investigation presents an astronomical timescale for the Aptian from the Ap2a to Ap14 carbon-isotope stages. Based on the evaluation of a multiproxy dataset from the Cau core, we recalibrate the age and duration of different biozones, bioevents, chemostratigraphic substages and horizons from the early and late Aptian, with special focus on the Selli Event, providing a new astronomical framework for Aptian climate. From the recognition of 14 long-eccentricity cycles, we propose a time span of 5.67 Ma from C-isotope segments Ap2a to the top of Ap14, and ages of 120.82 Ma for the onset of the nannoconid crisis, and 120.20 Ma for the onset of oceanic anoxic event (OAE) 1a. Calculations yield a duration of 1.47 Ma for OAE 1a. We estimate the age for the onset of the main non-radiogenic phase of the Os isotopes at 120.08 Ma, 120 ka after the onset of OAE 1a. The high-resolution data from the Cau core provide further insights in the temporal constraints of the OAE 1a and other Aptian paleoclimatic events. The onset of the main non-radiogenic excursion in Os isotopes occurring 120 ka after the onset of OAE 1a reinforces the theory of rapid destabilization of methane hydrates as the trigger of the anoxic event, that preceded the onset of large-scale volcanism.
英文关键词	Cyclostratigraphy & astrochronology; Aptian; OAE 1a; Time-series analysis; Paleoclimatology
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:001184360000001
来源期刊	GLOBAL AND PLANETARY CHANGE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/301538
作者单位	Universidad de Jaen; Universidad de Jaen; Complutense University of Madrid; University of Barcelona; University of Oxford
推荐引用方式 GB/T 7714	Martinez-Rodriguez, Rafael,Batenburg, Sietske J.,Castro, Jose M.,et al. Integrated cyclostratigraphy of the Cau core (SE Spain) - A timescale for climate change during the early Aptian Anoxic Event (OAE 1a) and the late Aptian[J],2024,233.
APA	Martinez-Rodriguez, Rafael.,Batenburg, Sietske J..,Castro, Jose M..,de Gea, Gines A..,Nieto, Luis M..,...&Robinson, Stuart.(2024).Integrated cyclostratigraphy of the Cau core (SE Spain) - A timescale for climate change during the early Aptian Anoxic Event (OAE 1a) and the late Aptian.GLOBAL AND PLANETARY CHANGE,233.
MLA	Martinez-Rodriguez, Rafael,et al."Integrated cyclostratigraphy of the Cau core (SE Spain) - A timescale for climate change during the early Aptian Anoxic Event (OAE 1a) and the late Aptian".GLOBAL AND PLANETARY CHANGE 233(2024).