Ministry of Mines
Publication: MRD308-REV
Title: New and Compiled Whole-Rock Geochemical and Isotope Data of Midcontinent Rift–Related Rocks, Thunder Bay Area
Publication Year: 2021
Type: Digital data
Author(s): R.M. Cundari, M.A. Puumala, M.C. Smyk and P. Hollings
Series: Miscellaneous Release—Data
Type: Digital data
Price: $20.00
NTS Number: 41, 42, 52
Topic: Precambrian bedrock geology., Proterozoic bedrock geology, Geochemistry, general
Abstract: This digital data release is an update of the Midcontinent Rift geochemical database released in 2013 as Miscellaneous Release—Data (MRD) 308. MRD 308—Revised includes new whole-rock and trace element analyses for 124 bedrock samples of mafic igneous rocks related to the Mesoproterozoic Midcontinent Rift. The release also includes a compilation of geochemical data for Midcontinent Rift–related rocks from the following previously released digital data sets: MRDs 114, 132, 133, 146, 147, 190, 261—Revised, 308, 319, 345, 352 and 368. The historical compilation includes 2821 spatially referenced data points with geochemical analyses. Additionally, 132 samples with Rb, Sr, Nd, Sm and/or εNd isotopic data are also included in this release, compiled from various sources. The compilation of data and a brief overview of the referenced MRDs and analytical procedures are presented as 2 Microsoft® Excel® for Office 365 (.xlsx) and 2 portable document format (.pdf) files.
Purpose: This product is part of an ongoing project to examine and characterize the mafic intrusions and volcanic rocks that are present along the north shore of Lake Superior and in the Lake Nipigon area, representing the northern expression of the Mesoproterozoic Midcontinent Rift.
Keywords: Precambrian Bedrock Geology:Mesoproterozoic:Southern Province (Geological):Analysis, Analyses:Geochemical Geochemistry:Bedrock Geochemistry:Radioisotopes:Rubidium/Strontium (Rb/Sr)
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