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Titanium, vanadium, and niobium mineralization and alkali metasomatism from the Magnet Cove complex, Arkansas

Economic Geology

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Abstract

The Christy deposit formed through a series of complex processes. The initial phase of mineralization is directly related to the infiltration of novaculite by alkali-rich fluids that were probably derived from carbonatite magma. Titanium, V, Nb, and Li were introduced by the alkali-rich fluids at temperatures that were as high as 600??C. During the initial stage of mineralization, V was concentrated in aegirine and sodic amphibole, Li was concentrated in taeniolite, minor amounts of Ti were concentrated in aegirine, and pyrite formed. The replacement of novaculite by the aforementioned minerals yielded excess silica, which precipitated as quartz. Niobium- and V-bearing brookite precipitated with the quartz. Minerals formed during the first stage reacted with a second fluid at temperatures of 100?? to 300??C and V was then concentrated in smectite and goethite. The second fluid was a mixture of low-temperature metasomatic fluid and groundwater. Vanadium was further concentrated in clay minerals in goethite, and in vug minerals as low-temperature alteration proceeded. -from Author

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Titanium, vanadium, and niobium mineralization and alkali metasomatism from the Magnet Cove complex, Arkansas
Series title:
Economic Geology
Volume
89
Issue:
1
Year Published:
1994
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
105
Last page:
130
Number of Pages:
26