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The potential role of magmatic gases in the genesis of Illinois- Kentucky fluorspar deposits: implications from chemical reaction path modeling

Economic Geology

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Abstract

Presents results of reaction path calculations using the chemical speciation and reaction path program SOLVEQ and CHILLER to model possible fluorite deposition mechanisms in the Illinois-Kentucky fluorspar district. The results indicate that the fluids responsible for Illinois-Kentucky fluorspar mineralization were most likely quite acidic (pH < 4) and rich in fluorine in order to produce the fluorite-rich, dolomite-poor mineral assemblages and extensive dissolution of host limestones. A possible source for the acid and fluorine may have been HF-rich gases which were expelled from alkalic magmas and then incorporated by migrating basinal brines. An analysis of the geologic setting of other fluorite deposits and districts worldwide suggests that involvement of magmatic gases is probable for many of these districts as well. -from Authors

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
The potential role of magmatic gases in the genesis of Illinois- Kentucky fluorspar deposits: implications from chemical reaction path modeling
Series title:
Economic Geology
Volume
90
Issue:
5
Year Published:
1995
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Economic Geology
First page:
999
Last page:
1011
Number of Pages:
13