A query from a colleague in southern Mississippi !
"I am having arguments online with someone about flow velocities of hydrothermal fluids and whether they are
able to entrain something like sand grains. My opponent disagrees and says
that velocities are too slow. Have you any knowledge of fluids that have
entrained grains or fragments of the surrounding host AND moved them over
some distance (metres or more)?"
I can recall reading about small volumes of sediment in open spaces in epithermal vein systems. Given the explosive potential of porphyry and epithermal systems (mill breccias etc) I am sure there must be so dramatic examples that would settle the above argument.
Can anyone help?
Thanks - Rob Willan
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Dr Robert CR Willan,
Magmatic-Hydrothermal Processes
Geological Sciences Division,
British Antarctic Survey,
Cambridge CB3 0ET, UK
Tel: 01223 221420
FAX: 01223 362616
Email: [log in to unmask]
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