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| Title: | Till geochemical and indicator mineral reconnaissance of Minnesota |
| Authors: | Thorleifson, L.Harvey
Harris, K.L.
Hobbs, H.C.
Jennings, C.E.
Knaeble, A.R.
Lively, R.S.
Lusardi, B.A.
Meyer, G.N. |
| Keywords: | Till
geology
Indicator minerals
geochemistry
Minnesota
exploration |
| Issue Date: | 2007 |
| Publisher: | Minnesota Geological Survey |
| Series/Report no.: | OFR
07-01 |
| Abstract: | As a cooperative project of the Minnesota Geological Survey and industry, the entire State of Minnesota
and adjacent regions was sampled for till geochemistry and indicator minerals at a 30-km spacing during
summer 2004. Within target cells, each a quarter-degree latitude by a half-degree longitude, till from
between about 1 and 2 m depth was sampled by filling a 15 liter plastic pail. At a few sites, vertical
profiles were collected. In addition, three transects to the north were sampled, to help identify sediments
derived by long-distance glacial transport, to obtain reference samples from the Thompson nickel belt,
and also to extend sampling to the limit of Hudson Bay-derived carbonate-bearing sediments, to permit
comparison to Minnesota carbonate-bearing sediments. Three control samples anomalous in kimberlite
indicator minerals from Kirkland Lake, Ontario, were also obtained. The resulting batch consisted of 250
samples covering Minnesota and adjacent areas, 20 samples from Canada, and the three standards. The results are a highly significant step forward in mapping
our geochemical landscape, in clarifying mineral potential, in provision of reference data useful to
environmental protection, public health, and exploration, and in supporting follow-up with respect to
potential mineralization. |
| Description: | Maps and data from the <63 micron geochemical analyses of this study are also included in the MGS Open File Report OFR-09-02 |
| Permanent URL: | http://purl.umn.edu/123358 |
| Appears in Collections: | Open-File Reports
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Files in This Item:
| File |
Description |
Size | Format |
|---|
| 05_Heavy_mineral_counts_ungrouped_maps.pdf | Heavy mineral counts ungrouped maps | 7913Kb | PDF | View/Open | | 15_Indicator_mineral_counts_maps.pdf | Maps of indicator mineral grain counts | 10214Kb | PDF | View/Open | | 14_Indicator_mineral_counts_data.pdf | Indicator mineral count data | 388Kb | PDF | View/Open | | 13_Geochemistry_HMC_ICP_maps.pdf | Heay mineral geochemistry maps-ICP | 2079Kb | PDF | View/Open | | 10_Geochemistry_HMC_NA_data.pdf | Heavy mineral geochemistry data-Neutron Activation | 68Kb | PDF | View/Open | | 06_Heavy_mineral_counts_grouped_data.pdf | Heavy mineral counts group data | 66Kb | PDF | View/Open | | ind_datafiles.zip | Supplementary digital (GIS) files | 763Kb | ZIP | View/Open | | 07_Heavy_mineral_counts_grouped_maps.pdf | Heavy mineral counts group maps | 4183Kb | PDF | View/Open | | 09_Geochemistry_63micron_maps.pdf | Less than 63 micron geochemical maps | 12034Kb | PDF | View/Open | | Photos_hvm_grains.zip | Photos of heavy mineral grains | 16805Kb | ZIP | View/Open | | index.txt | readme explanatory text file | 2Kb | Text | View/Open | | 12_Geochemistry_HMC_ICP_data.pdf | Heavy mineral geochemistry data-ICP | 35Kb | PDF | View/Open | | 11_Geochemistry_HMC_NA_maps.pdf | Heavy mineral geochemistry maps-Neutron Activation | 7604Kb | PDF | View/Open | | 08_Geochemistry_63micron_data.pdf | Less than 63 micron geochemical data | 106Kb | PDF | View/Open | | 04_Heavy_mineral_counts_ungrouped_data.pdf | Heavy mineral counts ungrouped data | 68Kb | PDF | View/Open | | 01_Report.pdf | Final Report | 4739Kb | PDF | View/Open | | 03_Field_and_lithologic_data_maps.pdf | Field data and lithologic data maps | 6536Kb | PDF | View/Open | | 02_Field_and_lithologic_data.pdf | Field data and lithologic data | 212Kb | PDF | View/Open |
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