Scientist Emeritus
Email:
wcannon@usgs.gov
Office Phone:
703-648-6345
Fax:
703-648-6383
ORCID:
0000-0002-2699-8118
Location
12201 Sunrise Valley Drive
Reston
, VA
20192-0002
US
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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,...
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This dataset supports the publication “Geophysical insights into Paleoproterozoic tectonics along the southern margin of the Superior Province, central Upper Peninsula, Michigan, USA.” At a 1:100,000 scale, these data are in a geologic database in the Geologic Map Schema (GeMS) which includes spatial feature classes and non-spatial tables that contain the geologic information presented in figure 8 and S3 of appendix A, the supplemental map of the publication. Geologic map of the central Upper Peninsula, Michigan
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Alger County,
Ashland County,
Baraga County,
Bayfield County,
Delta County, All tags...
Dickinson County,
Economic Geology,
Florence County,
Forest County,
Geography,
Geomorphology,
Geophysics,
Glaciology,
Gogebic County,
Houghton County,
Iron County,
MI,
Marinette County,
Marquette County,
Menominee County,
Michigan,
Mineral Resources,
Oneida County,
Ontonagon County,
Price County,
Sawyer County,
Stratigraphy,
Structural Geology,
USGS Science Data Catalog (SDC),
Vilas County,
WI,
Wisconsin,
bedrock geologic units,
data services,
geographic information systems,
geologic maps,
geology,
geospatial datasets,
structural geology, Fewer tags
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This dataset comprises photomicrographs from drill core and outcrop samples from the Ironwood Iron-Formation.
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These data comprise chemical analyses in weight percent of oxides, as well as chlorine and fluorine, conducted using a JEOL JXA-8900 electron microprobe analyzer (EPMA) on amphiboles, pyroxenes, and carbonates in the Ironwood Iron-Formation.
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This dataset comprises various energy-dispersive spectroscopy (EDS) analyses from drill core and outcrop samples in the Ironwood Iron-Formation, Gogebic Iron Range, Wisconsin, USA.
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