Channelled fluid infiltration and variation in permeability in Reynolds Range marbles, Australia

I. Cartwright, I. S. Buick

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Abstract

Strike-parallel flow of H2O-rich fluids through Reynolds Range marbles formed wollastonite-bearing assemblages. Wollastonite abundance varies on a millimetre scale from 10 to 66 modal%. The mineralogy of unmetasomatized marbles suggests that the formation of more than c.19% wollastonite requires silica metasomatism. Comparison with advective transport models suggests that the variable wollastonite contents may be explained by time-integrated fluid fluxes and intrinsic permeability varying by up to two orders of magnitude on a millimetre scale. Fluids were probably focused through the marble within microfractures and the variations in intrinsic permeability may reflect variable fracture density. -Authors

Original languageEnglish
Pages (from-to)583-586
Number of pages4
JournalJournal of the Geological Society
Volume151
Issue number4
DOIs
Publication statusPublished - 1 Jan 1994

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