DOI: 10.1002/2015GL063636
论文题名: Xenon isotopes in the MORB source, not distinctive of early global degassing
作者: Boehnke P. ; Caffee M.W. ; Harrison T.M.
刊名: Geophysical Research Letters
ISSN: 0094-9403
EISSN: 1944-9134
出版年: 2015
卷: 42, 期: 11 起始页码: 4367
结束页码: 4374
语种: 英语
英文关键词: MORB
; xenon
Scopus关键词: Degassing
; Isotopes
; Markov processes
; Catastrophic loss
; Formation and evolutions
; Isotopic components
; Mantle degassing
; Markov Chain Monte-Carlo
; Mid ocean ridge basalts
; MORB
; Radiogenic ingrowths
; Xenon
英文摘要: Although fissiogenic Xe in mid-ocean ridge basalt (MORB) has long been used inferred to infer an early (>4 Ga) catastrophic mantle degassing, decomposition of the analyzed gas in terms of its constituents requires several assumptions. The canonical interpretation has not been tested using the full spectrum of possible initial components and radiogenic inputs. We use a Markov chain Monte Carlo approach that examines a broad range of Xe isotopic components present during Earth formation and evolution. Our best fit simulations are consistent with the preservation of much higher Pu/U in MORB source Xe than previously recognized but are equally supportive of both limited and early catastrophic loss. We show that an initially Xe depleted upper mantle that becomes progressively ingassed through both radiogenic ingrowth and subduction of evolving atmospheric Xe is equally consistent with all evidence, underscoring the need for improvements to our knowledge of fission Xe spectra, MORB Xe measurements, and Pu geochemistry. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84934439282&doi=10.1002%2f2015GL063636&partnerID=40&md5=0d314ff7fc95e7018deb3d08d6bfdf45
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9018
Appears in Collections: 科学计划与规划 气候变化与战略
There are no files associated with this item.
作者单位: Department of Earth, Planetary, and Space Sciences, UCLA, Los Angeles, CA, United States
Recommended Citation:
Boehnke P.,Caffee M.W.,Harrison T.M.. Xenon isotopes in the MORB source, not distinctive of early global degassing[J]. Geophysical Research Letters,2015-01-01,42(11).