气候变化领域集成服务门户(CCPortal): Synchronizing rock clocks of earth history

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DOI	10.1126/science.1154339
	Synchronizing rock clocks of earth history
	Kuiper K.F.; Deino A.; Hilgen F.J.; Krijgsman W.; Renne P.R.; Wijbrans J.R.
发表日期	2008
ISSN	0036-8075
起始页码	500
结束页码	504
卷号	320 期号:5875
英文摘要	Calibration of the geological time scale is achieved by independent radioisotopic and astronomical dating, but these techniques yield discrepancies of ∼1.0% or more, limiting our ability to reconstruct Earth history. To overcome this fundamental setback, we compared astronomical and 40Ar/39Ar ages of tephras in marine deposits in Morocco to calibrate the age of Fish Canyon sanidine, the most widely used standard in 40Ar/39Ar geochronology. This calibration results in a more precise older age of 28.201 ± 0.046 million years ago (Ma) and reduces the 40Ar/39Ar method's absolute uncertainty from ∼2.5 to 0.25%. In addition, this calibration provides tight constraints for the astronomical tuning of pre-Neogene successions, resulting in a mutually consistent age of ∼65.95 Ma for the Cretaceous/Tertiary boundary.
英文关键词	argon; radioisotope; age determination; argon isotope; calibration; comparative study; Cretaceous; Neogene; radionuclide; reconstruction; tephra; accuracy; article; astronomy; calibration; chronology; geological time; priority journal; sedimentation; volcanic ash; Africa; Morocco; North Africa
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/244416
作者单位	Faculty of Geosciences, Department of Earth Sciences, Utrecht University, Budapestlaan 4, 3584 CD Utrecht, Netherlands; Faculty of Earth and Life Sciences, Institute of Earth Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1085, 1081 HV Amsterdam, Netherlands; Berkeley Geochronology Center, 2455 Ridge Road, Berkeley, CA 94709, United States; Department of Earth and Planetary Science, University of California, Berkeley, CA 94720, United States
推荐引用方式 GB/T 7714	Kuiper K.F.,Deino A.,Hilgen F.J.,et al. Synchronizing rock clocks of earth history[J],2008,320(5875).
APA	Kuiper K.F.,Deino A.,Hilgen F.J.,Krijgsman W.,Renne P.R.,&Wijbrans J.R..(2008).Synchronizing rock clocks of earth history.Science,320(5875).
MLA	Kuiper K.F.,et al."Synchronizing rock clocks of earth history".Science 320.5875(2008).