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Geofluids

The origin and fate of fluids generated by subduction of oceanic lithosphere, the partial melting of asthenosphere mantle, and the formation of a magmatic arc. Some fluid in the oceanic crust is recycled to the deep mantle. Fluid flow in the accretionary prism is driven by compaction, tectonic compression, and clay dehydration. Note the deflection of geotherms by descending, cold, oceanic lithosphere. Modified from Farsang et al., 2021 and Miller 2013.

Geofluids transfer mass (fresh water, carbon dioxide, methane, hydrocarbons, dissolved mass) and heat throughout the crust and lithosphere mantle where they play a significant role in dynamic, magmatic, and chemical processes. Water and its dissolved constituents, particularly carbon as aqueous CO2 and carbonate, are recycled from oceanic crust to the mantle lithosphere via subduction zones. and in turn are eventually expelled to the atmosphere and hydrosphere.

In sedimentary basins, geofluids govern sediment compaction, the transfer of dissolved mass that produces a swath of diagenetic and metamorphic changes, heat flow, and mineralization.

Articles on shallow groundwater are listed separately under the banner Hydrogeology.

 

Geofluids: Lithosphere-scale fluid flow

Geofluids: Sedimentary basin-scale fluid flow

Geofluids: The permeability of faults

 

Archives
Categories
dip and strike compass
Measuring dip and strike
sandstone classification header
Classification of sandstones
Calcite cemented subarkose, Proterozoic Altyn Fm. southern Alberta
Sandstones in thin section
poles to bedding great circles
Stereographic projection – poles to planes
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Fluid flow: Froude and Reynolds numbers
Stokes Law for particle settling in a schematic context of other fluid flow functions
Fluid flow: Stokes Law and particle settling
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Classification of sedimentary basins
Model are representational descriptions are written in different languages - diagrammatic, descriptive, mathematical, and conceptual. They commonly contain variables and dimensionless quantities that permit quantitative analysis of the physical systems the models represent.
Geological models
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