Rocks & Minerals

Tri-State and Viburnum Trend Districts.

Rocks & Minerals | November 1, 1997 | Copyright

AN OVERVIEW

The Midwest contains two of the greatest concentrations of zinc and lead in the world. These are the Tri-State district of Oklahoma, Kansas, and Missouri and the world-class Viburnum Trend of southeastern Missouri. Deposits in both of these districts are of the Mississippi Valley-type (MVT). Such districts have a number of characteristics in common:

* The host rock is dolomitized limestone.

* The mining district is on a dome or arch.

* Mineralization is confined to stratigraphic units.

* Temperature of mineralization was…

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