Effect of Quartz Deposition on the Dynamics of Magma Chamber Degassing

The filtration of a supercritical brine flow during the magma chamber degassing is numerically simulated with consideration of quartz transport and deposition. It is shown that the quartz deposition and the accompanying decrease of permeability reduce the size of the concentrated brine lens formed a...

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Bibliographic Details
Published in:Moscow University mechanics bulletin 2018-11, Vol.73 (6), p.129-134
Main Authors: Utkin, I. S., Mel’nik, O. E., Afanas’ev, A. A., Tsvetkova, Yu. D.
Format: Article
Language:English
Subjects:
Classical Mechanics
Computer simulation
Degassing
Deposition
Hydraulic fracturing
Magma
Permeability
Physics
Physics and Astronomy
Quartz
Saline water
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Summary:The filtration of a supercritical brine flow during the magma chamber degassing is numerically simulated with consideration of quartz transport and deposition. It is shown that the quartz deposition and the accompanying decrease of permeability reduce the size of the concentrated brine lens formed above the magma chamber. The effect of rock hydraulic fracture on the lens formation is studied. An unsteady degassing regime is revealed; this regime is associated with a periodic increase and decrease in permeability due to the hydraulic fracturing and quartz deposition. The obtained numerical results are in agreement with the geological data on the structure of copper deposits.
ISSN:0027-1330
1934-8452
DOI:10.3103/S0027133018060018