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Partitioning of zinc among common ferromagnesian minerals and implications for hydrothermal mobilization

Canadian Mineralogist

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Abstract

In systems where metals are scavenging from crystalline rocks by through-flowing fluids, the important host minerals must be dissolved or must undergo cation-exchange reactions with the fluid. Whereas copper resides in sulfides, zinc resides in magnetic and, to a lesser extent, in biotite, clinopyroxene and olivine. Magnetite is known from petrographic studies to be more resistant to alteration than sulfides. For metals extracted from crystalline rocks, the Cu:Zn mass ratio may thus decrease with progressive alteration. In systems where metals are scavenged from cooling magmas by exsolving fluids, the metals are partitioned among melt, fluid and any crystals that have fractionated. For zinc, crystal fractionation may be an important sink if magnetite or biotite crystallize before fluid saturation. The zinc concentrations of magmatic fluids will thus be reduced. -from Author

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Partitioning of zinc among common ferromagnesian minerals and implications for hydrothermal mobilization
Series title:
Canadian Mineralogist
Volume
32
Issue:
1
Year Published:
1994
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Canadian Mineralogist
First page:
121
Last page:
132
Number of Pages:
12