Compilation of new and previously published geochemical and modal data for Mesoproterozoic igneous rocks of the St. Francois Mountains, southeast Missouri

Data Series 1080
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Abstract

The purpose of this report is to present recently acquired as well as previously published geochemical and modal petrographic data for igneous rocks in the St. Francois Mountains, southeast Missouri, as part of an ongoing effort to understand the regional geology and ore deposits of the Mesoproterozoic basement rocks of southeast Missouri, USA. The report includes geochemical data that is (1) newly acquired by the U.S. Geological Survey and (2) compiled from numerous sources published during the last fifty-five years. These data are required for ongoing petrogenetic investigations of these rocks. Voluminous Mesoproterozoic igneous rocks in the St. Francois Mountains of southeast Missouri constitute the basement buried beneath Paleozoic sedimentary rock that is over 600 meters thick in places. The Mesoproterozoic rocks of southeast Missouri represent a significant component of approximately 1.4 billion-year-old (Ga) igneous rocks that crop out extensively in North America along the southeast margin of Laurentia and subsequent researchers suggested that iron oxide-copper deposits in the St. Francois Mountains are genetically associated with ca. 1.4 Ga magmatism in this region. The geochemical and modal data sets described herein were compiled to support investigations concerning the tectonic setting and petrologic processes responsible for the associated magmatism.

Suggested Citation

du Bray, E.A. Day, W.C., and Meighan, C.J., 2018,Compilation of new and previously published geochemical and modal data for Mesoproterozoic igneous rocks of the St. Francois Mountains, southeast Missouri: U.S. Geological Survey Data Series 1080, 10 p., https://doi.org/10.3133/ds1080.

ISSN: 2327-638X (online)

Study Area

Table of Contents

  • Acknowledgments
  • Introduction
  • Previously Published and New Geochemical Data Produced by the U.S. Geological Survey
  • Geochemical Data Compiled From Published Literature
  • Geochemical Data Processing
  • Modal Data
  • Data Fields
  • References Cited
  • Appendix 1. Field Notes for Igneous Rocks of the St. Francois Mountains, Southeast Missouri Collected Between 2015 and 2017 (ds1080_appendix1_MO15_17_Field_Notes)
  • Appendix 2. Geochemical and Modal Data for Igneous Rocks in the St. Francois Mountains, Southeast Missouri (ds1080_appendix2_SE_MO_ChemData.xlsx)

Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title Compilation of new and previously published geochemical and modal data for Mesoproterozoic igneous rocks of the St. Francois Mountains, southeast Missouri
Series title Data Series
Series number 1080
DOI 10.3133/ds1080
Year Published 2018
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Central Mineral and Environmental Resources Science Center
Description Report: iv, 10 p.; Appendixes; Data Release; Read Me
Country United States
State Missouri
Other Geospatial St. Francois Mountains
Online Only (Y/N) Y