Abstract

A method for determining the direction of flow of hydrothermal solutions, using the measured temperature of filling of liquid inclusions in vein minerals, is outlined. The application of the method to the low temperature ore of the McIntyre and Lamaque mines shows that the solutions moved upward in the inclined ore zones under a driving pressure gradient of 400 atmospheres per mile. Relative flow velocities can also be measured in any one vein.

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