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DOI	10.1016/j.epsl.2021.116859
	Achieving complete reaction while the solid volume increases: A numerical model applied to serpentinisation
	Malvoisin B.; Podladchikov Y.Y.; Myasnikov A.V.
发表日期	2021
ISSN	0012821X
卷号	563
英文摘要	Solid volume increases during the hydration of mantle rocks. The fluid pathways necessary to feed the reaction front with water can be filled by the low density reaction products. As a result, the reaction front dries out and the reaction stops at low reaction progress. This process of porosity clogging is generally predicted to dominate in reactive transport models, even when processes such as reaction-induced fracturing are considered. These predictions are not consistent with observations at mid-ocean ridges where dense mantle rocks can be completely replaced by low density serpentine minerals. To solve this issue, we develop a numerical model coupling reaction, fluid flow and deformation. High extents of reaction can only be achieved when considering that the increase in solid volume during reaction is accommodated through deformation rather than porosity clogging. The model can generate an overpressure that depends on the extent of reaction and on the boundary conditions. This overpressure induces viscoelastic compaction that limits the extent of the reaction. The serpentinisation rate is therefore controlled by the accommodation of volume change during reaction, and thus by deformation, either induced by the reaction itself or by tectonic processes. © 2021 Elsevier B.V.
关键词	crystallisation pressure porosity clogging reaction rate serpentinisation solid volume increase tectonic deformation
英文关键词	Flow of fluids; Numerical models; Porosity; Reaction rates; Serpentine; Tectonics; Crystallization pressure; Lower density; Mantle rocks; Porosity clogging; Reaction front; Reactions rates; Serpentinisation; Solid volume increase; Solid volumes; Tectonic deformations; Deformation; chemical reaction; crystallization; deformation; fluid flow; fracture; numerical model; overpressure; porosity; serpentinization; volume change
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203208
作者单位	Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, Grenoble, 38000, France; ISTE-FGSE, Université de Lausanne, Quartier de la Mouline, Géopolis, Lausanne, CH-1015, Switzerland; Faculty of Mechanics and Mathematics, Moscow State University, Russian Federation
推荐引用方式 GB/T 7714	Malvoisin B.,Podladchikov Y.Y.,Myasnikov A.V.. Achieving complete reaction while the solid volume increases: A numerical model applied to serpentinisation[J],2021,563.
APA	Malvoisin B.,Podladchikov Y.Y.,&Myasnikov A.V..(2021).Achieving complete reaction while the solid volume increases: A numerical model applied to serpentinisation.Earth and Planetary Science Letters,563.
MLA	Malvoisin B.,et al."Achieving complete reaction while the solid volume increases: A numerical model applied to serpentinisation".Earth and Planetary Science Letters 563(2021).