气候变化领域集成服务门户(CCPortal): A comparison between zircons from the Acasta Gneiss Complex and the Jack Hills region

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DOI	10.1016/j.epsl.2019.115975
	A comparison between zircons from the Acasta Gneiss Complex and the Jack Hills region
	Reimink J.R.; Davies J.H.F.L.; Bauer A.M.; Chacko T.
发表日期	2020
ISSN	0012821X
卷号	531
英文摘要	The composition and origin of the earliest continental crust is intensely debated. The understanding of its composition relies heavily on the oldest vestiges of continental crust, which includes detrital zircon grains that are up to 4.36 billion-years-old (Ga) and <4.03 Ga zircon-bearing rocks. However, the interpretation of these two sample suites has thus far remained largely separate. Here, we demonstrate that the trace-element compositions of magmatic zircons from the Acasta Gneiss Complex compare favorably with those of ancient detrital zircons from western Australia. We combine these new data with existing oxygen and hafnium isotope datasets to show that the petrological processes that formed the Acasta Gneiss Complex, namely partial melting of mafic crust at various depths, are an appropriate analogue for the formation of the Hadean crust parental to the Jack Hills zircon grains. We also suggest that a transition from shallow-, to deep-crustal melting occurred in the JH source region ca. 3.8 Ga. © 2019 Elsevier B.V.
关键词	Acasta Gneiss Complex crustal evolution Hf-isotope Jack Hills trace elements zircon
英文关键词	Isotopes; Melting; Silicate minerals; Trace elements; Zircon deposits; Continental crusts; Crustal evolution; Detrital zircon grains; Gneiss complexes; Hf isotope; Jack hills; Trace element composition; Western Australia; Zircon; Acasta
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/202851
作者单位	Department of Terrestrial Magnetism, Carnegie Institution for Science, Washington, DC 20015, United States; Department of Geosciences, The Pennsylvania State University, University Park, PA 16803, United States; Département des Sciences de la Terre et de l'Atmosphère, Université du Québec à Montréal, Montréal, QC H2X3Y7, Canada; Department of Geology and Geophysics, Yale University, New Haven, CT 06511, United States; Department of Geoscience, University of Wisconsin-Madison, Madison, WI 53706, United States; Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB T6G2E3, Canada
推荐引用方式 GB/T 7714	Reimink J.R.,Davies J.H.F.L.,Bauer A.M.,et al. A comparison between zircons from the Acasta Gneiss Complex and the Jack Hills region[J],2020,531.
APA	Reimink J.R.,Davies J.H.F.L.,Bauer A.M.,&Chacko T..(2020).A comparison between zircons from the Acasta Gneiss Complex and the Jack Hills region.Earth and Planetary Science Letters,531.
MLA	Reimink J.R.,et al."A comparison between zircons from the Acasta Gneiss Complex and the Jack Hills region".Earth and Planetary Science Letters 531(2020).