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Open-File Report 2014–1053

Geologic Field Notes and Geochemical Analyses of Outcrop and Drill Core from Mesoproterozoic Rocks and Iron-Oxide Deposits and Prospects of Southeast Missouri

By Warren C. Day and Matthew Granitto

Thumbnail of and link to report PDF (236 kB)Abstract

The U.S. Geological Survey, in cooperation with the Missouri Department of Natural Resources/Missouri Geological Survey, undertook a study from 1988 to 1994 on the iron-oxide deposits and their host Mesoproterozoic igneous rocks in southeastern Missouri. The project resulted in an improvement of our understanding of the geologic setting, mode of formation, and the composition of many of the known deposits and prospects and the associated rocks of the St. Francois terrane in Missouri. The goal for this earlier work was to allow the comparison of Missouri iron-oxide deposits in context with other iron oxide-copper ± uranium (IOCG) types of mineral deposits observed globally. The raw geochemical analyses were released originally through the USGS National Geochemical Database (NGDB, http://mrdata.usgs.gov). The data presented herein offers all of the field notes, locations, rock descriptions, and geochemical analyses in a coherent package to facilitate new research efforts in IOCG deposit types. The data are provided in both Microsoft Excel (Version Office 2010) spreadsheet format (*.xlsx) and MS-DOS text formats (*.txt) for ease of use by numerous computer programs.

First posted April 18, 2014

For additional information, contact:
Director, Central Mineral and Environmental Resources Science Center
U.S. Geological Survey
Box 25046, MS-973
Denver Federal Center
Denver, CO 80225
http://minerals.cr.usgs.gov/

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Suggested citation:

Day, W.C., and Granitto, Matthew, 2014, Geologic field notes and geochemical analyses of outcrop and drill core from Mesoproterozoic rocks and iron-oxide deposits and prospects of southeast Missouri: U.S. Geological Survey Open-File Report 2014–1053, 7 p., http://dx.doi.org/10.3133/ofr20141053.

ISSN 2331-1258 (online)



Contents

Abstract

Introduction

Geochemical Analyses

Geologic Field Notes

References Cited


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