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Document Type

Research

Keywords

Sulfide mineral deposits, hydrothermal alteration, northeast Iowa

Abstract

The Mineral Creek sulfide deposits are located in Allamakee County, Iowa on the extreme northwest fringe of the upper Mississippi Valley zinc-lead district. The ores consist of extensively weathered lead, zinc, and iron sulfides which were emplaced in areas of intense solution-collapse brecciation and along bedding plane and steeply-dipping longitudinal fractures. Mineralization appears to be localized on the crest of a NE-trending anticline, related to early Ordovician tectonism which affected NE Iowa and adjacent Wisconsin. Mineralogy and paragenesis of vein and hydrothermal alteration deposits at Mineral Creek are very similar to those of other fringe deposits in Iowa and Wisconsin. Much of the silicification (jasperoid) appears to be prehydrothermal.

Publication Date

June 1983

Journal Title

Proceedings of the Iowa Academy of Science

Volume

90

Issue

2

First Page

44

Last Page

49

Copyright

© Copyright 1983 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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