Transport phenomena in hydrothermal systems; the nature of porosity

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ID: 292604
1977
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Abstract
The porosity (P) of rock is described by: P-total = P-flow + P-diffusion + P-residual. Experimental results show that P-total of fractured rock in hydrothermal systems ranges from 0.2 to 0.01, and P-diffusion ranges from 0.001 to 0.00001. Data from the literature and from field studies of fractures indicate that P-flow is 0.001-0.00001. Consequently, the greater part of P-total in plutonic environments results from residual pores which are not interconnected to P-flow or P-diffusion. Permeability is a function of the abundance and geometry of continuous flow paths. Observations suggest that a planar fracture is a good first order approximation for fractures in plutonic environments. Analysis of aperture, abundance, and continuity suggests that permeabilities on the order of 1.0 nm/sup 2/ may be characteristic of large portions of the crust. The model proposed permits definition of the interface between circulating hydrothermal fluids and reactant minerals in a manner consistent with the physical phenomena and partial differential equations which describe the processes of advection-diffusion-reaction.
Reference Key
openalex_W1969225519 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors D. Norton, Richard B. Knapp
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Journal american journal of science
Year 1977
DOI
10.2475/ajs.277.8.913
URL
https://ajsonline.org/article/59936.pdf
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