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Minnesota Geological Survey, in cooperation with industry, sampled the State of Minnesota and adjacent regions 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...
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Minnesota Geological Survey is working with partners to build a statewide, consistent, standardized, and documented geochemical database, due to the convergence of: 1) systematic sampling & analysis of soils and stream sediments by the USGS & the MGS; 2) completion of a statewide till geochemical survey by MGS in cooperation with industry, and 3) renewed efforts by Minnesota Pollution Control Agency (MPCA) to ensure optimal usability of their state ground-water chemistry data. The soil/sediment data are distributed statewide, were collected over a short period of time, and samples from each project were analyzed by the individual labs following consistent and documented protocols, while the MPCA water analyses were...


    map background search result map search result map Collection of Geochemical Samples from Minnesota Collection of Geochemical Data from Minnesota Collection of Geochemical Samples from Minnesota Collection of Geochemical Data from Minnesota