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Hydrothermal systems and volcano geochemistry

  • Robert O. Fournier
Chapter
Part of the Springer Praxis Books book series (PRAXIS)

Abstract

The upward intrusion of magma from deeper to shallower levels beneath volcanoes obviously plays an important role in their surface deformation. This chapter will examine less obvious roles that hydrothermal processes might play in volcanic deformation. Emphasis will be placed on the effect that the transition from brittle to plastic behavior of rocks is likely to have on magma degassing and hydrothermal processes, and on the likely chemical variations in brine and gas compositions that occur as a result of movement of aqueous-rich fluids from plastic into brittle rock at different depths. To a great extent, the model of hydrothermal processes in sub-volcanic systems that is presented here is inferential, based in part on information obtained from deep drilling for geothermal resources, and in part on the study of ore deposits that are thought to have formed in volcanic and shallow plutonic environments.

Keywords

Hydrothermal System Shear Failure Superheated Steam Lithostatic Pressure Magmatic Body 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Praxis Publishing Ltd, Chichester, UK 2007

Authors and Affiliations

  • Robert O. Fournier

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