气候变化领域集成服务门户(CCPortal): Extensive crustal extraction in Earth’s early history inferred from molybdenum isotopes

CCPortal

DOI	10.1038/s41561-019-0451-2
	Extensive crustal extraction in Earth’s early history inferred from molybdenum isotopes
	McCoy-West A.J.; Chowdhury P.; Burton K.W.; Sossi P.; Nowell G.M.; Fitton J.G.; Kerr A.C.; Cawood P.A.; Williams H.M.
发表日期	2019
ISSN	17520894
卷号	12 期号:11
英文摘要	Estimates of the volume of the earliest crust based on zircon ages and radiogenic isotopes remain equivocal. Stable isotope systems, such as molybdenum, have the potential to provide further constraints but remain underused due to the lack of complementarity between mantle and crustal reservoirs. Here we present molybdenum isotope data for Archaean komatiites and Phanerozoic komatiites and picrites and demonstrate that their mantle sources all possess subchondritic signatures complementary to the superchondritic continental crust. These results confirm that the present-day degree of mantle depletion was achieved by 3.5 billion years ago and that Earth has been in a steady state with respect to molybdenum recycling. Mass balance modelling shows that this early mantle depletion requires the extraction of a far greater volume of mafic-dominated protocrust than previously thought, more than twice the volume of the continental crust today, implying rapid crustal growth and destruction in the first billion years of Earth’s history. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	Archean; continental crust; crustal structure; isotopic composition; lithostratigraphy; mass balance; molybdenum; radionuclide; zircon
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124584
作者单位	Department of Earth Sciences, Durham University, Durham, United Kingdom; School of Earth, Atmosphere and Environment, Monash University, Clayton, VIC, Australia; Institute of Geochemistry and Petrology, ETH Zürich, Zürich, Switzerland; School of GeoSciences, University of Edinburgh, Edinburgh, United Kingdom; School of Earth and Ocean Sciences, Cardiff University, Cardiff, United Kingdom; Department of Earth Sciences, University of Cambridge, Cambridge, United Kingdom
推荐引用方式 GB/T 7714	McCoy-West A.J.,Chowdhury P.,Burton K.W.,等. Extensive crustal extraction in Earth’s early history inferred from molybdenum isotopes[J],2019,12(11).
APA	McCoy-West A.J..,Chowdhury P..,Burton K.W..,Sossi P..,Nowell G.M..,...&Williams H.M..(2019).Extensive crustal extraction in Earth’s early history inferred from molybdenum isotopes.Nature Geoscience,12(11).
MLA	McCoy-West A.J.,et al."Extensive crustal extraction in Earth’s early history inferred from molybdenum isotopes".Nature Geoscience 12.11(2019).