DOI: 10.1016/j.epsl.2018.02.036
Scopus记录号: 2-s2.0-85043285394
论文题名: Increased production of cosmogenic 10Be recorded in oceanic sediment sequences: Information on the age, duration, and amplitude of the geomagnetic dipole moment minimum over the Matuyama–Brunhes transition
作者: Simon Q. ; Thouveny N. ; Bourlès D.L. ; Bassinot F. ; Savranskaia T. ; Valet J.-P. ; ASTER Team
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 489 起始页码: 191
结束页码: 202
语种: 英语
英文关键词: atmospheric 10Be production rates
; authigenic 10Be/9Be ratio
; geomagnetic dipole moment minimum
; geomagnetic polarity reversal
; marine isotope stage 19
; Matuyama–Brunhes transition (MBT)
Scopus关键词: Dipole moment
; Geographical distribution
; Glacial geology
; Isotopes
; Stratigraphy
; Authigenic
; Geomagnetic dipole moment
; Geomagnetic polarity reversal
; Marine isotope stages
; Production rates
; Geomagnetism
; age determination
; amplitude
; authigenic mineral
; beryllium isotope
; Brunhes chron
; cosmogenic radionuclide
; isotopic ratio
; magnetic reversal
; marine isotope stage
; marine sediment
; Matuyama chron
; sedimentary sequence
; Atlantic Ocean
; Atlantic Ocean (North)
; Indian Ocean
; Pacific Ocean
; Cibicides wuellerstorfi
英文摘要: New high-resolution authigenic 10Be/9Be ratio (Be-ratio) records covering the last geomagnetic reversal, i.e. the Matuyama–Brunhes transition (MBT), have been obtained and set on a time scale using benthic δ18O (Cibicides wuellerstorfi) records. The geographic distribution of the four studied sites allows global comparison between the North Atlantic, Indian and Pacific Oceans. All Be-ratio records contain a two-fold increase triggered by the geomagnetic dipole moment (GDM) collapse associated with the MBT. The stratigraphic position of the Be-ratio spike, relative to marine isotope stages, allows establishment of a robust astrochronological framework for the MBT, anchoring its age between 778 and 766 ka (average mid-peaks at 772 ka), which is consistent with all other available 10Be-proxy records from marine, ice and loess archives. The global 10Be atmospheric production doubling represents an increase of more than 300 atoms m−2 s−1 that is compatible with the increased magnitude of atmospheric 10Be production obtained by simulations between the present GDM and a null-GDM. The minimum 10Be-derived GDM average computed for the 776–771 ka interval is 1.7±0.4×1022 Am2, in agreement with model simulations and absolute paleointensities of transitional lava flows. © 2018 The Author(s) Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109955
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: CEREGE UM34, Aix Marseille Univ., CNRS, IRD, INRA, Coll France, Aix-en-Provence, France; Institut de Physique du Globe de Paris, Sorbonne Paris-Cité, Université Paris Diderot, UMR 7154 CNRS, Paris, France; LSCE, UMR8212, LSCE/IPSL, CEA–CNRS–UVSQ, Université Paris-Saclay, Gif-Sur-Yvette, France
Recommended Citation:
Simon Q.,Thouveny N.,Bourlès D.L.,et al. Increased production of cosmogenic 10Be recorded in oceanic sediment sequences: Information on the age, duration, and amplitude of the geomagnetic dipole moment minimum over the Matuyama–Brunhes transition[J]. Earth and Planetary Science Letters,2018-01-01,489