DOI: 10.1016/j.epsl.2018.02.035
Scopus记录号: 2-s2.0-85042937292
论文题名: Carbonate stability in the reduced lower mantle
作者: Dorfman S.M. ; Badro J. ; Nabiei F. ; Prakapenka V.B. ; Cantoni M. ; Gillet P.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 489 起始页码: 84
结束页码: 91
语种: 英语
英文关键词: deep carbon cycle
; diamond anvil cell
; lower mantle
; phase equilibria
; redox
Scopus关键词: Calcite
; Calcium carbonate
; Carbonates
; Carbonation
; Diamonds
; Earth (planet)
; Experimental mineralogy
; Magnesite
; Phase equilibria
; Structural geology
; Thermodynamic stability
; Deep carbon cycles
; Diamond-anvil cell
; Laser-heated diamond anvil cells
; Lower mantle
; Lower mantle condition
; Pressure and temperature
; redox
; Relative stabilities
; Iron compounds
; carbonate
; diamond anvil cell
; dolomite
; lower mantle
; mantle chemistry
; P-T conditions
; petrology
; phase equilibrium
; redox conditions
; stability analysis
; thermodynamics
英文摘要: Carbonate minerals are important hosts of carbon in the crust and mantle with a key role in the transport and storage of carbon in Earth's deep interior over the history of the planet. Whether subducted carbonates efficiently melt and break down due to interactions with reduced phases or are preserved to great depths and ultimately reach the core-mantle boundary remains controversial. In this study, experiments in the laser-heated diamond anvil cell (LHDAC) on layered samples of dolomite (Mg, Ca)CO3 and iron at pressure and temperature conditions reaching those of the deep lower mantle show that carbon-iron redox interactions destabilize the MgCO3 component, producing a mixture of diamond, Fe7C3, and (Mg, Fe)O. However, CaCO3 is preserved, supporting its relative stability in carbonate-rich lithologies under reducing lower mantle conditions. These results constrain the thermodynamic stability of redox-driven breakdown of carbonates and demonstrate progress towards multiphase mantle petrology in the LHDAC at conditions of the lowermost mantle. © 2018 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109960
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: Earth and Planetary Science Laboratory, Ecole polytechnique fédérale de Lausanne, Station 3, Lausanne, CH-1015, Switzerland; Department of Earth and Environmental Sciences, Michigan State University, East Lansing, MI 48824, United States; Institut de Physique du Globe de Paris, Sorbonne Paris Cité, UMR CNRS 7154, Paris, 75005, France; Center for Advanced Radiation Sources, University of Chicago, Argonne, IL 60439, United States; Centre Interdisciplinaire de Microscopie Electronique, Ecole polytechnique fédérale de Lausanne, Station 12, Lausanne, 1015, Switzerland
Recommended Citation:
Dorfman S.M.,Badro J.,Nabiei F.,et al. Carbonate stability in the reduced lower mantle[J]. Earth and Planetary Science Letters,2018-01-01,489