Geochemical and Modal Data for Mesoproterozoic Igneous Rocks of the St. Francois Mountains, Southeast Missouri

Dates

Publication Date: 2018-04-16
Start Date: 1895
End Date: 2017

Citation

Granitto, M., du Bray, E.A., Day, W.C., Meighan, C.J., Slack, J.F., and Ayuso, R.A., 2018, Geochemical and modal data for Mesoproterozoic igneous rocks of the St. Francois Mountains, southeast Missouri: U.S. Geological Survey data release, https://doi.org/10.5066/F79W0DSN.

Summary

This data release accompanies the Data Series report 'Compilation of new and previously published geochemical and modal data for Mesoproterozoic igneous rocks of the St. Francois Mountains, southeast Missouri’ (https://doi.org/10.3133/ds1080). The compilation includes recently acquired as well as previously published geochemical and modal petrographic data for igneous rocks in the St. Francois Mountains, southeast Missouri, and supports an ongoing effort to understand the regional geology and ore deposits of the Mesoproterozoic basement rocks of southeast Missouri, USA. This data release includes geochemical data that are (1) newly acquired by the U.S. Geological Survey (USGS) and (2) compiled from numerous sources published during [...]

Summary

This data release accompanies the Data Series report 'Compilation of new and previously published geochemical and modal data for Mesoproterozoic igneous rocks of the St. Francois Mountains, southeast Missouri’ (https://doi.org/10.3133/ds1080). The compilation includes recently acquired as well as previously published geochemical and modal petrographic data for igneous rocks in the St. Francois Mountains, southeast Missouri, and supports an ongoing effort to understand the regional geology and ore deposits of the Mesoproterozoic basement rocks of southeast Missouri, USA. This data release includes geochemical data that are (1) newly acquired by the U.S. Geological Survey (USGS) and (2) compiled from numerous sources published during the last fifty-five years. These data are required for ongoing petrogenetic investigations of these rocks.

This data release also contains selected data for Mesoproterozoic igneous rocks that were previously published in three U.S. Geological Survey (USGS) data releases (Day and Granitto, 2014; Day, Granitto, and others, 2016, and Granitto and others, 2017). These previously published USGS products include sample description, sample locations, and major oxide and trace element determinations for Mesoproterozoic igneous samples, as well as other samples collected in southeast Missouri by the USGS from the late 1980s through 2017.

In this data release, field notes pertinent to the 2015-2017 samples, prefixed with MO15, MO16, and MO17 and where '_xxx' is the individual sample number, are included as Appendix 1 in the Microsoft Excel file 'DS1080_appendix1_MO15_17_Field_Notes.xlxs' file and in its derivative ASCII tab-delimited text file. Data attributes in these files include the field number (Field_ID), location (Latitude, Longitude), rock type (Rock_Type), description of the rock and (or) outcrop from which the sample was collected (Rock_Description), the alteration minerals observed in the field (Alt_Minerals), and their mode of occurrence (Alt_Style). For completeness, the field notes files also include descriptive information for samples without corresponding geochemical analyses.

Prior investigations report compositional data for Mesoproterozoic igneous rocks in the St. Francois Mountains that contribute significantly to the understanding of the geochemistry of the region. These data have been compiled during our investigations and are reported herein. For an individual sample to be included in our compilation, a minimum data set consisting of a sample identification value, location information, and a major oxide analysis was required. Additional data were included when available. As a result of this compilation, data for 618 unaltered samples and 549 altered samples were identified and included in this data release as Appendix 2, the Microsoft Excel file 'DS1080_appendix2_SE_MO_ChemData.xlsx,' and its derivative ASCII tab-delimited text files 'DS1080_appendix2SE_MO_ChemData_FreshUnaltered.txt' and 'DS1080_appendix2_SE_MO_ChemData_AlteredMineralized.txt'. Data sources, including published reports and theses, are itemized and tabulated in the Data_Src field in Appendix 2.

Along with the data found in Day and Granitto, 2014; Day, Granitto, and others, 2016, and Granitto and others, 2017, this compilation process has likely resulted in the identification and incorporation of the majority of compositional data available for Mesoproterozoic igneous rocks in the St. Francois Mountains, Missouri. Compiling analytical methods and associated estimates of precision and accuracy associated with previously published data is beyond the scope of this effort. Analytical protocols, precision, and accuracy were highly variable among the previous publication sources. Fortunately, most publications document these parameters and details can be retrieved by referring to the original publication identified in the Data_Src field. Background documentation for some samples or analytical data presented in this data release may be incomplete, misleading, or incorrect, any of which could result in the inclusion of inappropriate information in the data set. All efforts have been made to exclude inappropriate samples or misleading data; the amount of inappropriate data inadvertently included in the data set is probably small and is unlikely to significantly affect data interpretation.

Contacts

Point of Contact :: Matthew Granitto
Process Contact :: Matthew Granitto
Originator :: Matthew Granitto, Edward A du Bray, Warren C Day, Corey J Meighan, John F Slack, Robert A Ayuso
Metadata Contact :: Matthew Granitto
Publisher :: U.S. Geological Survey
Distributor :: U.S.Geological Survey - ScienceBase
USGS Mission Area :: Energy and Minerals
SDC Data Owner :: Geology, Geophysics, and Geochemistry Science Center

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DS1080_metadata_SE_MO.xml “Metadata in .xml format” Original FGDC Metadata	View	117.63 KB	application/fgdc+xml
DS1080_appendix2_SE_MO_ChemData.xlsx “Chem Data in .xlsx format”		688.51 KB	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
DS1080_metadata_SE_MO.faq.html “Metadata in .faq.html format”		122.66 KB	text/html
DS1080_metadata_SE_MO.html “Metadata in .html format”		155.65 KB	text/html
DS1080_metadata_SE_MO.txt “Metadata in .txt format”		114.94 KB	text/plain
DS1080_appendix2_SE_MO_ChemData_FreshUnaltered.txt “Chem Data - Fresh/Unaltered Rocks in .txt format”		253.55 KB	text/plain
DS1080_appendix2_SE_MO_ChemData_AlteredMineralized.txt “Chem Data - Altered/Mineralized Rocks in .txt format”		344.13 KB	text/plain
DS1080_appendix1_MO15_17_Field_Notes.txt “Field Notes in .txt format”		15.85 KB	text/plain
DS1080_appendix1_MO15_17_Field_Notes.xlsx “Field Notes in .xlsx format”		26.95 KB	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet

Shapefile: SE_MO_locs.zip
SE_MO_locs.cpg		5 Bytes
SE_MO_locs.dbf		351.5 KB
SE_MO_locs.prj		168 Bytes
SE_MO_locs.sbn		11.42 KB
SE_MO_locs.sbx		372 Bytes
SE_MO_locs.shp		33.68 KB
SE_MO_locs.shx		9.69 KB

Related External Resources

Type: Related Primary Publication

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, https://doi.org/10.3133/ds1080.	https://doi.org/10.3133/ds1080

Purpose

These data present new quantitative and qualitative geochemical analyses from recently acquired as well as previously published geochemical and modal petrographic data for igneous rocks in the St. Francois Mountains, southeast Missouri. The data support an ongoing effort to understand the regional geology and ore deposits of the Mesoproterozoic basement rocks of southeast Missouri, USA. The data may also inform present and future geologic and geochemical projects involving precious and critical metals in this and similar deposit types.

Geochemical and Modal Data for Mesoproterozoic Igneous Rocks of the St. Francois Mountains, Southeast Missouri

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