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Filters: Contacts: Jacqueline D Hamilton (X)

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An archive of mineral exploration files is maintained by MN DNR at its Hibbing facility MN DNR mineral exploration files archive
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All sediment samples from auger holes, outcrops, and cores are processed to determine texture. The 1-2 mm coarse sand fraction is packaged separately, and about half of these fractions are categorized lithologically by a glacial geologist. The data are recorded on paper data sheets and in a database.
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Compiled public domain and donated geotechnical drillhole data; plans call for this database to be merged with sediment composition profiles
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about 90% Precambrian, nearly all related to mapping projects, most from recent decades total to the nearest thousand
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GeMS, the MGS geological mapping system, is a database structure for Precambrian geological mapping projects that is replicated in each new project. The project databases have not been merged into a single database; includes sample sites, structural measurements, and outcrop descriptions
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The Minnesota drill core repository is managed by the Department of Natural Resources, in relation to a legislated obligation to submit a one-fourth portion of core samples obtained for mineral exploration. These samples become property of the state and are stored in the DNR's drill core library, located in Hibbing. The original drill core library was constructed in 1972. The most recent additions were constructed in 1990, and were subsequently expanded in 1995. Construction presently is underway on an expansion. The existing facility contains nearly 2.3 million feet of core, extracted from 79 Minnesota counties during the period from 1905 to the present.
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Geoscientific collections managed by Minnesota Geological Survey are aggregated in the National Digital Catalog to enhance discovery and use of valuable samples and data for further scientific research. Contact information and material access instructions are provided for the individual collections.
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Thin sections, nearly all Precambrian rocks, nearly all related to mapping projects; many several decades old total to the nearest thousand
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Paleontological specimens related to University of Minnesota School of Earth Sciences research; about a quarter from Minnesota; includes reference collections for lower Paleozoic of the upper Mississippi valley Stored at the Bell Museum
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Minnesota Geological Survey field notebooks, many several decades old, approximate total number of notebooks in 31 archive boxes
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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...
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Over 61,000 Minnesota Geological Survey gravity station represents more than 40 years of surveying. The 2003 release added over 2000 stations relative to its 1991 predecessor as a result of ongoing project work, along with inclusion of additional archival data. Ongoing augmentation of the database is based on measurements at stations on profiles spaced at 0.25 mile intervals along corridors, to areas where stations are spaced at 0.5 to 1.0 mile intervals, and in some areas 2 miles, along available roads and trails. Most of the new measurements were taken with a Lacoste and Romberg G-320 gravity meter with a stated precision of 0.01 milligal. As a result of various error sources, gravity values are considered precise...
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Minnesota Geological Survey (MGS) aeromagnetic data were acquired during a 1979-1991 statewide survey program, and were completely re-processed in 2005/2007 to recover line data that was missing from the primary archive at the National Geophysical Data Center, to improve line-leveling errors in the data, and to re-grid the data. Aeromagnetic database
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Samples are collected by MGS staff at outcrops, from auger drill holes, and rotary sonic drill holes. Samples are processed by student technicians to determine sample texture (% gravel, sand, silt, and clay). Approximately 100-150 grams of original sample is stored in a packet along with subpackets of the gravel fraction, 1-2 mm sand fraction, and <2 mm sand fraction. All lab data are recorded on paper lab sheets stored in the lab. Technicians also enter data into the MGS lithological database. Grain count analyses have been completed by glacial geologists on somewhere between 25 and 50% of these samples. These results are also recorded on paper sheets and in the database.


    map background search result map search result map Minnesota Geological Survey Collection of Field notebooks from MN Collection of Thin sections from MN Collection of Hand samples from MN Collection of Paleontological samples from MN Collection of Aeromagnetic database from MN Collection of Mineral exploration files from MN Collection of Drill cores from MN Collection of Geological mapping data from MN Collection of Sediment textural and lithological data from MN Collection of Gravity database from MN Collection of Geochemical Data from MN Collection of Sediment samples from MN Collection of Geotechnical drilling from MN Minnesota Geological Survey Collection of Field notebooks from MN Collection of Thin sections from MN Collection of Hand samples from MN Collection of Paleontological samples from MN Collection of Aeromagnetic database from MN Collection of Mineral exploration files from MN Collection of Drill cores from MN Collection of Geological mapping data from MN Collection of Sediment textural and lithological data from MN Collection of Gravity database from MN Collection of Geochemical Data from MN Collection of Sediment samples from MN Collection of Geotechnical drilling from MN