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Chemistry, morphology, modal mineralogy, and photomicrographs of amphiboles and other minerals in the Ironwood Iron-Formation, Gogebic Iron Range, Wisconsin, USA

Dates

First Processing Date
2015
Release Date
2018
Publication Date
Revision
2019-06-11

Citation

Green, C.J., Seal II, R.R., Cannon, W.F., Piatak, N.M., and McAleer, R.J., 2018, Chemistry, morphology, modal mineralogy, and photomicrographs of amphiboles and other minerals in the Ironwood Iron-Formation, Gogebic Iron Range, Wisconsin, USA (ver. 2.0, April 2019): U.S. Geological Survey data release, https://doi.org/10.5066/F7P84B41.

Summary

The Ironwood Iron-Formation, part of the Gogebic Iron Range in Wisconsin, is a Paleoproterozoic Superior-type banded iron formation (BIF) with substantial iron resource potential. The development of a Mesoproterozoic contact metamorphic aureole related to the emplacement of the Mellen Intrusive Complex resulted in the production of a variety of silicate minerals in the western portion of the Ironwood Iron-Formation, including amphibole, pyroxene, and olivine. The presence of amphibole minerals, some of which occur in a fibrous habit, has complicated development of this resource due to potential human health impacts. This data release provides information related to amphibole and other minerals in order that commercial, regulatory, [...]

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revision_history_v.2.0.txt 647 Bytes

Purpose

To provide information related to the chemistry, morphology, quantity, and distribution of amphibole minerals in the Ironwood Iron-Formation. This information may be used to better inform potential resource development plans and to better understand potential human health impacts of mining.

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Revision 2.0 by Carlin Green in April of 2019. To review the changes that were made, see “revision_history_v.2.0.txt” in the attached files section.

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DOI https://www.sciencebase.gov/vocab/category/item/identifier doi:10.5066/F7P84B41

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