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
Journal american journal of science
Year 1977
DOI
10.2475/ajs.277.8.913
URL
https://ajsonline.org/article/59936.pdf
Keywords Keywords not found

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