DOI: 10.1016/j.epsl.2021.116893
论文题名: Evidence for crustal removal, tectonic erosion and flare-ups from the Japanese evolving forearc sediment provenance
作者: Pastor-Galán D. ; Spencer C.J. ; Furukawa T. ; Tsujimori T.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2021
卷: 564 语种: 英语
中文关键词: crustal growth
; detrital zircon
; geochronology
; Lu-Hf
; tectonic erosion
英文关键词: Binary alloys
; Erosion
; Hafnium alloys
; Isotopes
; Lead alloys
; Sedimentology
; Tectonics
; Uranium alloys
; Zircon
; Crustal growth
; Crustals
; Detrital zircon
; Fore-arc basin
; Forearc
; Hf isotope
; Isotope data
; Lu-hf
; Sediment provenance
; Tectonic erosion
; Geochronology
; continental crust
; erosion
; forearc basin
; geochronology
; hafnium
; magmatism
; provenance
; reworking
; Silurian
; subduction
; zircon
; Honshu
; Japan
英文摘要: Forearc basins preserve the geologic record relating strictly to arc magmatism. The provenance of forearc sediment can be used to differentiate periods of crustal growth, accretion, and destruction, enhanced magmatism, advancing and retreating subduction slabs, delamination, etc. These tectonic systems predict differing degrees of sedimentary reworking of the older forearc units. Additionally, Hf isotopes of zircon can be used to evaluate the degree of continental reworking that occurs in the arc system. In this paper, we evaluate the changes in a long-lived subduction system using detrital zircon U-Pb and Hf-isotope data from forearc units in northern Honshu, Japan that span in age from the Silurian Period to the present from the forearc provenance of the Japanese subduction system. Our data demonstrate a series of dominant age peaks (430 ± 20, 360 ± 10, 270 ± 20, 184 ± 12, 112 ± 22, and 7 ± 7 Ma) and a progressive loss of the older zircon populations. Zircon Hf-isotope data reveal three discrete shifts that correspond to differing degrees of isotopic enrichment and correlate with changes in the dominant zircon age peaks. Additionally, each temporal isotopic shift is associated with isolation of the older sedimentary packages wherein no detrital zircon from the previous stages are observed in subsequent stages. We propose these shifts provide evidence for rapid shifts in arc tectonics including magmatic flare-ups, producing the dominant peaks; protracted tectonic erosion progressively removing older sources of zircon reveals a late Carboniferous event triggering the complete removal of the Precambrian crust; and the Cretaceous melting of the entire Permian arc crust, likely related with the subduction of the mid-oceanic ridge separating the Izanagi and Pacific plates. © 2021 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165625
Appears in Collections: 气候变化与战略
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作者单位: Frontier Research Institute for Interdisciplinary Science, Tohoku University, Japan; Center for North East Asian Studies, Tohoku University, 41 Kawauchi, Aoba-ku, Miyagi, Sendai, 980-8576, Japan; Department Earth Science, Tohoku University, Japan; School of Earth and Planetary Sciences, The Institute for Geoscience Research (TIGeR), Curtin University, Perth, Australia; Department of Geological Sciences and Geological Engineering, Queen's University, Kingston, Canada
Recommended Citation:
Pastor-Galán D.,Spencer C.J.,Furukawa T.,et al. Evidence for crustal removal, tectonic erosion and flare-ups from the Japanese evolving forearc sediment provenance[J]. Earth and Planetary Science Letters,2021-01-01,564