DOI: 10.1016/j.epsl.2018.04.051
Scopus记录号: 2-s2.0-85046682406
论文题名: Rapid crustal growth and efficient crustal recycling in the early Earth: Implications for Hadean and Archean geodynamics
作者: Rosas J.C. ; Korenaga J.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 494 起始页码: 42
结束页码: 49
语种: 英语
英文关键词: crust–mantle differentiation
; plate tectonics
; Sm–Nd isotope systems
Scopus关键词: Geodynamics
; Heat convection
; Isotopes
; Monte Carlo methods
; Recycling
; Silicate minerals
; Zircon
; Continental crusts
; Crustal evolution
; Mantle convection
; Mantle differentiation
; Monte Carlo sampling
; Nd isotopes
; Neodymium isotope evolution
; Stagnant lid convection
; Tectonics
; crust-mantle boundary
; crustal evolution
; crustal recycling
; crustal structure
; early Earth
; geodynamics
; Hadean
; neodymium isotope
; plate tectonics
; samarium
英文摘要: The geodynamic regime of the early Earth remains elusive, with so far proposed hypotheses ranging from stagnant lid convection to rapid plate tectonics. Available geological data are severely limited for the first two billion years of the Earth's history, and this scarcity of relevant data is often compounded by the nonuniqueness of interpretation. Here we propose that the samarium–neodymium isotope evolution, which has been suggested to be consistent with stagnant lid convection in the early Earth, may be better understood as the result of rapid crustal growth and extensive crustal recycling. We delineate the permissible scenario of crustal evolution through geochemical box modeling with a Monte Carlo sampling of the model parameter space, and our results suggest that the net growth of continental crust was complete by the end of the Hadean and that the rate of crustal recycling could have been as high as 2−4×1022 kg Gyr−1 at that time and has gradually decreased since then. Such crustal evolution yields a specific prediction for the present-day distribution of crustal formation ages, which is shown to be in remarkable agreement with a recent estimate based on the global compilation of zircon age data. The mode of subsolidus mantle convection after the putative magma ocean is probably plate tectonics, but its style could have been very different from that of contemporary plate tectonics, characterized by more voluminous magmatism and more destructive subduction. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109842
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
There are no files associated with this item.
作者单位: Department of Geology and Geophysics, Yale University, P.O. Box 208109, New Haven, CT 06520-8109, United States
Recommended Citation:
Rosas J.C.,Korenaga J.. Rapid crustal growth and efficient crustal recycling in the early Earth: Implications for Hadean and Archean geodynamics[J]. Earth and Planetary Science Letters,2018-01-01,494