Pore Fluid Extraction by Reactive Solitary Waves in 3-D
| Autor: | Yury Podladchikov, Samuel Omlin, Benjamin Malvoisin |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010504 meteorology & atmospheric sciences
Subduction Compaction Crust Metamorphic reaction Geophysics Mechanics 010502 geochemistry & geophysics 01 natural sciences Physics::Geophysics Diagenesis Physics::Fluid Dynamics General Earth and Planetary Sciences Extraction (military) Gravity wave Porosity Geology 0105 earth and related environmental sciences |
| Zdroj: | Geophysical Research Letters. 44:9267-9275 |
| ISSN: | 0094-8276 |
| DOI: | 10.1002/2017gl074293 |
| Popis: | In the lower crust, viscous compaction is known to produce solitary porosity and fluid pressure waves. Metamorphic (de)volatilization reactions can also induce porosity changes in response to the propagating fluid pressure anomalies. Here we present results from high-resolution simulations using Graphic Processing Unit parallel processing with a model that includes both viscous (de)compaction and reaction-induced porosity changes. Reactive porosity waves propagate in a manner similar to viscous porosity waves, but through a different mechanism involving fluid release and trap in the solid by reaction. These waves self-generate from red noise or an ellipsoidal porosity anomaly with the same characteristic size and abandon their source region to propagate at constant velocity. Two waves traveling at different velocities pass through each other in a soliton-like fashion. Reactive porosity waves thus provide an additional mechanism for fluid extraction at shallow depths with implications for ore formation, diagenesis, metamorphic veins formation, and fluid extraction from subduction zones. |
| Databáze: | OpenAIRE |
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