DOI: 10.1016/j.epsl.2018.08.024
Scopus记录号: 2-s2.0-85054061378
论文题名: Electrolytic fluid speciation by Gibbs energy minimization and implications for subduction zone mass transfer
作者: Connolly J.A.D. ; Galvez M.E.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 501 起始页码: 90
结束页码: 102
语种: 英语
英文关键词: decarbonation
; devolatilization
; electrolytic fluid speciation
; Gibbs energy minimization
; mass transfer
; subduction
Scopus关键词: Chemical potential
; Chemical speciation
; Chemical stability
; Mass transfer
; Decarbonation
; Devolatilization
; Electrolytic fluid
; Gibbs energy minimization
; subduction
; Gibbs free energy
英文摘要: The number of solute species required to describe the thermodynamic behavior of electrolytic fluids is a hindrance to the incorporation of aqueous geochemistry in petrological Gibbs energy minimization procedures. An algorithm is developed to overcome this problem. Beginning from the solute-free limit, chemical potentials, and phase stability are determined by minimization, the solute speciation and bulk fluid properties consistent with these chemical potentials are then computed and the procedure repeated until the chemical potentials converge. Application of the algorithm to a model for metamorphism of subducted sediment shows that accounting for solute chemistry does not change the conclusion based on molecular fluid models that a pervasive water flux from the subjacent mantle is required to explain island-arc carbon emissions by fluid-mediated slab decarbonation. This putative flux would deplete the sediment in potassium, limiting the capacity of the slab to transport water to greater depth and rendering it refractory to melting. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109673
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: Department of Earth Sciences, Swiss Federal Institute of Technology, Zurich, CH-8092, Switzerland
Recommended Citation:
Connolly J.A.D.,Galvez M.E.. Electrolytic fluid speciation by Gibbs energy minimization and implications for subduction zone mass transfer[J]. Earth and Planetary Science Letters,2018-01-01,501