Zientek, Michael L.

About the author

ORCID: 0000-0002-8522-9626
Archaean, Proterozoic, Aeromagnetic surveying, Aluminum, Antimony, Arsenic, Atomic emission spectroscopy, Barium, Bedrock geologic units, Beryllium, Bibliographies, Bismuth, Borehole logging, Boron, Cadmium, Calcium, Carbon, Cerium, Cesium, Chromium, Coal resources, Cobalt, Copper, Core analysis, Datasets, Digitization, Drilling and coring, Dysprosium, Economic geology, Erbium, Europium, Field monitoring stations, Foliation (geologic), Gadolinium, Gallium, Geochemistry, Geochronology, Geographic information systems, Geologic contacts, Geologic history, Geologic maps, Geologic structure, Geology, Geophysics, Geospatial analysis, Geospatial datasets, Geothermal resources, Germanium, Gold, Grain-size analysis, Gravimeter measurement, Gravitational field (earth), Hafnium, Holmium, Igneous rocks, Image collections, Indium, Iridium, Iron, Lanthanum, Lead, Lithium, Lutetium, Magnesium, Magnetic field (earth), Manganese, Maps and atlases, Mass spectroscopy, Mathematical simulation, Metallic mineral resources, Mine drainage, Mine waste, Mineral deposits, Mineral resources, Mineralogy, Mining and quarrying, Molybdenum, Natural resource assessment, Natural resource exploration, Neodymium, Neutron activation analysis, Nickel, Niobium, Osmium, Palladium, Particle-beam spectroscopy, Petrography, Phosphorus, Platinum, Platinum-group elements, Plutonic rocks, Potassium, Praseodymium, Reports, Resource supply and demand, Rhenium, Rhodium, Rocks and deposits, Rubidium, Ruthenium, Samarium, Scandium, Scientific software, Sedimentary rocks, Selenium, Silicon, Silver, Sodium, Stratigraphic sections, Strontium, Structural geology, Sulfur, Surficial geologic units, Tantalum, Tectonic processes, Tellurium, Terbium, Thallium, Thorium, Thulium, Tin, Titanium, Tungsten, Uranium, Uranium-lead analysis, Vanadium, Volcanic rocks, X-ray fluorescence, Ytterbium, Yttrium, Zinc, Zirconium, Mine sites, Mineral deposit areas, Anorthosite, Norite, Peridotite, Porphyry, Pyroxenite, Quartzite, Sandstone, Sedimentary rock, Abrasive, Garnet, Chromium, Copper, Copper, Sulfide, Iridium, Lead, Nickel, Osmium, Palladium, Platinum, Rhodium, Ruthenium, Silver, Talc-Soapstone, Zinc, Platinum-group elements, ARC/INFO grid export format, ArcInfo coverage, ArcInfo interchange, Canon Raw version 2, DBF, GeoTIFF, Geosoft grid format, HTML table, JPEG, KML, Microsoft Access format, Microsoft Excel format, Portable Document Format, TIFF, USGS PC binary grid format, Columnar text, Comma-delimited text, File geodatabase (Esri), Shapefile, Software, Tab-delimited text, Antimony, Barite, Bentonite, Chromium, Clays, Copper, Diatomite, Gallium, Gemstones, Gold, Gypsum, Iron ore, Lead, Lithium, Mercury, Molybdenum, Nickel, Platinum-group metals, Rare earths, Silver, Stone (dimension), Titanium, Titanium mineral concentrates (ilmenite, rutile), Tungsten, Vanadium, Zeolites (natural), Zinc

Spatial databases for the geology of the Northern Rocky Mountains - Idaho, Montana, and Washington

The spatial databases represent the original content of 43 published geologic maps, provide normalized map unit descriptions, and provide additional information and interpretation not in the original reports.

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Global Mineral Resource Assessment

Regional locations and estimates of the probable amounts of undiscovered resources of copper, platinum-group elements, and potash in selected types of mineral deposits to depths of 1 to 3 kilometers below the surface of the earth worldwide.

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A geologic and mineral exploration spatial database for the Stillwater Complex, Montana

<p>The Stillwater Complex is a Neoarchean, ultramafic to mafic layered intrusion exposed in the Beartooth Mountains in south-central Montana. This igneous intrusion contains magmatic mineralization that is variably enriched in strategic and critical commo

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Platinum-group elements in southern Africa: mineral inventory and an assessment of undiscovered mineral resources

This study summarizes the identified mineral inventory of PGE in South Africa and Zimbabwe and estimates the potential amount of undiscovered PGE resources that may be present in these countries.

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Platinum-group elements: so many excellent properties

Includes platinum, palladium, rhodium, ruthenium, iridium, and osmium. These metals have similar physical and chemical properties and occur together in nature.

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Sediment-hosted stratabound copper assessment of the Neoproterozoic Roan Group, central African copperbelt, Katanga Basin, Democratic Republic of the Congo and Zambia

This study area encompasses the greatest sediment-hosted copper-cobalt province in the world, containing 152 million metric tons of copper in greater than 80 deposits.

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Assessment of undiscovered copper resources associated with the Permian Kupferschiefer, Southern Permian Basin, Europe

This study delineated permissive areas for undiscovered porphyry copper deposits, compiled a database of known deposits and significant prospects, estimated undiscovered deposits within those areas and made probabilistic estimates of their metal content.

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Qualitative assessment of selected areas of the world for undiscovered sediment-hosted stratabound copper deposits

For each area in which this type of deposit may occur, we provide the main characteristics of the area, classification of known deposits by subtype, and a rank indicating the potential of the area to contain undiscovered resources.

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Platinum-Group Elements

The platinum-group elements (PGEs)—platinum, palladium, rhodium, ruthenium, iridium, and osmium—are metals that have similar physical and chemical properties and tend to occur together in nature. PGEs are indispensable to many industrial applications.

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Geochronologic data from xenoliths near the Stillwater Complex, Montana

U-Pb isotopic data collected on zircon in xenoliths from the Sliderock Mountain and Susie Peak plutons using the sensitive high-resolution ion microprobe-reverse geometry (SHRIMP-RG) at Stanford University. Data are provided in CSV format, locations are provided in shapefile format.

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Thin section images of AMAX drill core from the Stillwater Complex, Montana

Photographs and micrographs of rock taken from cores in this area. Data are provided in JPEG and CR2 formats.

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Thin section images of drill core and hand samples from the Stillwater Mine area, Stillwater Complex, Montana

Photographs and micrographs of hand samples and drill core from this area to study platinum-group element reef-type mineralization that occurs in the J-M Reef of the Stillwater Complex. Data are provided in JPEG and CR2 formats.

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Thin section images of drill core from the Chrome Lake area in the Stillwater Complex, Montana

Photomicrographs, lithologic and textural information for drill core from this area to study contact-type mineralization that occurs near the lower contact (Basal series and hornfels rocks) of the complex. Data are provided as JPG and CR2 images.

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Thin section images of drill core from the Crescent Creek area in the Stillwater Complex, Montana

Photographic images of thin sections of drill core from this area to study contact-type copper and nickel sulfide mineralization there. Data are provided in JPEG and CR2 formats, with a shapefile giving locations of the cores.

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Thin section images of xenoliths from north of the Stillwater Complex, Montana

Micrographs (photographs taken using a microscope) of xenoliths (pre-existing rock material included in younger rocks) in this area, to understand the formation of mineral deposits there. Data are provided in JPEG and CR2 formats.

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Thin section images of drill core and hand samples from the South Kawishiwi Intrusion, Duluth Complex, Minnesota

Lithologic and textural information for hand samples and drill core from this rock body, to study copper-nickel-platinum-group element mineralization that occurs at this locality. Data are provided in JPG and CR2 formats.

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Thin section images of hand samples from the Crocodile Lake and Cucumber Lake Intrusions, Duluth Complex, Minnesota

Lithologic and textural information for hand samples collected from these rock bodies, to study copper-nickel-platinum-group element mineralization that occurs there. Data are provided in JPG and CR2 image formats.

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A compilation of spatial digital databases for selected U.S. Geological Survey nonfuel mineral resource assessments for parts of Idaho and Montana

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Relational database for the geology of the northern Rocky Mountains; Idaho, Montana, and Washington

Geologic map unit and lithologic descriptions used in Open File Report 2005-1235, with extensive bibliographic references to geologic literature that could not be included in the spatial database.

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Global Mineral Resource Assessment-Aggregation of estimated numbers of undiscovered deposits-an R-script with an example from the Chu Sarysu Basin, Kazakhtan

This report provides a script developed in open-source statistical software, R, that aggregates undiscovered deposit estimates of a given type assuming some degree of correlation among aggregated areas, provided a user-specified correlation matrix.

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Geology and mineral resources of the North-Central Montana Sagebrush Focal Area: Chapter D in Mineral resources of the Sagebrush Focal Areas of Idaho, Montana, Nevada, Oregon, Utah, and Wyoming

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Previous mineral resource assessment data compilation for the U.S. Geological Survey Sagebrush Mineral Resource Assessment Project

A compilation of previously published mineral potential maps that were used for the Sagebrush Mineral Resource Assessment (SaMiRA) project. Data are provided in CSV, Esri file geodatabase, GeoTiff, and shapefile formats.

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Simulation and aggregation data for estimates of undiscovered copper in porphyry copper deposits from the Global Mineral Resource Assessment

Results of Monte Carlo simulations of amounts of copper in undiscovered porphyry copper deposits in 163 permissive tracts aggregated by world region. Data are provided in CSV format.

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Assessment of undiscovered copper resources of the world, 2015

The U.S. Geological Survey completed the first-ever global assessment of undiscovered copper resources for the two most significant sources of global copper supply: porphyry copper deposits and sediment-hosted stratabound copper deposits. The geology-base

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Stillwater Complex Rock Outcrop Database

Polygons that describe areas of rock outcrop in the area of the Stillwater Complex, Montana from published reports and field mapping sheets. Includes both legacy data and outcrops from recent field mapping. This dataset contains overlapping polygons, as some areas had mapping from different sources that overlapped the same locations. Data are provided in shapefile format.

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Stillwater Complex Strike and Dip Database

Geologic structure strike and dip information from this area from pre-existing digital strike and dip information and from digitizing strike and dip locations from georeferenced map images. Data are provided in shapefile format.

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TIMA-X Bright Phase Analysis of Platinum-Group Minerals in Selected Samples from the Chrome and Iron Mountain areas of the Stillwater Complex, Montana

Bright phase and energy-dispersive spectroscopic analyses were performed to evaluate platinum-group element and mineral distribution in a variety of rock types from the lower stratigraphy of the Stillwater Complex in Montana. Data are provided in CSV format, supporting analytical data are provided as PDF reports and TIFF images.

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Stillwater Complex, Montana - Logs of core drilled by AMAX, 1969 to 1977

Scanned drill core logs and explanatory material provided in PDF format. Hand-written notes provided in CSV format. Locations provided in shapefile format.

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Structural measurements and their calculated surface traces, South Kawishiwi area, Duluth Complex, Minnesota

Structural measurements taken from this area and surface traces of the structural measurements. Data are provided in shapefile format.

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Guide to geophysical data for the northern Rocky Mountains and adjacent areas, Idaho, Montana, Washington, Oregon, and Wyoming

Mathematical analysis of gravity and aeromagnetic data, with basic and derived grids and vector data and maps.

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An index to PGE-Ni-Cr deposits and occurrences in selected mineral-occurrence databases (original report)

A compendium of references to previously published databases and database records that describe PGE, nickel, and chromium deposits and occurrences. These data show where to obtain more detailed information about each deposit or occurrence.

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An index to PGE-Ni-Cr deposits and occurrences in selected mineral-occurrence databases (web-accessible database)

A compendium of references to previously published databases and database records that describe PGE, nickel, and chromium deposits and occurrences. These data show where to obtain more detailed information about each deposit or occurrence.

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Overview with methods and procedures of the U.S. Geological Survey mineral-resource assessment of the Sagebrush Focal Areas of Idaho, Montana, Nevada, Oregon, Utah, and Wyoming

Describes the methods, procedures, and fundamental reference information that were used throughout the assessment.

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Titanium-vanadium deposits hosted in mafic-ultramafic layered intrusions and massif anorthosite intrusions from around the world

Information on titanium-vanadium deposits hosted in mafic-ultramafic layered intrusions and massif anorthosite intrusions from around the world. Includes only deposits with reported grade and tonnage information. Data are provided in CSV and shapefile formats.

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Lithogeochemistry of selected surface and drill core samples from the Chrome and Iron Mountain areas of the Stillwater Complex, Montana

Whole rock geochemical analysis of sulfide- and chromite-bearing samples in this area, with specific interest in PGE, cobalt, and gold concentrations. Data are provided in CSV format.

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Stillwater Complex, Montana: Logs of core drilled by Anaconda in the Benbow area, 1969 to 1973

Scanned drill core logs and explanatory material provided in PDF format. Hand-written notes provided in CSV format. Locations provided in shapefile format.

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Stillwater Complex, Montana: Logs of core drilled by Anaconda in the Nye Basin area, 1968 to 1982

Images of graphic drill core logs showing associated drill core information, explanation for the lithology and structure sections of the logs, locations of the drill holes, and tabular data compiled from handwritten notes on the logs. Data are provided in TIFF, shapefile, and CSV formats.

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Stillwater Complex, Montana: Logs of core drilled by Cyprus in the Chrome Lake area, 1971 to 1980

Historical context of minerals exploration in this area including the locations of drill cores and lithologic, structural, grain size, and chromite, sulfide, copper, and nickel mineralization. Data are provided in TIFF images, with originally hand written information provided in CSV format, and location information as shapefiles.

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Geochemistry of rocks and rock fabric data near the hanging wall contact to the Reef Package, Stillwater Complex, Montana, USA

Whole-rock major, minor, and trace element geochemistry of rock samples collected from diamond drill holes that intersect the textural discontinuity at the top of the Reef Package from the underground working of the Stillwater Mine. Data are provide in CSV format.

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Stillwater Complex, Montana: Logs of core drilled by Chrome Corporation of America in the Mountain View area, 1988 to 1990

Images of graphic drill core logs showing associated drill core information, an image of the explanation for the lithology and structure sections of the logs, the locations of the drill holes, and tabular data compiled from handwritten drill core logs. Data are provided in TIFF and CSV formats.

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Stratabound copper-silver deposits of the Mesoproterozoic Revett Formation, Montana and Idaho with a section on databases and spatial-data files for the geology and mineral deposits of the Revett Formation

Includes deposits, occurrences, and prospects; drill core logs and measured sections; and spatial databases for geologic maps, untested exploration areas, and permissive tracts for undiscovered mineral deposits.

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Mineral resources of the Sagebrush Focal Areas of Idaho, Montana, Nevada, Oregon, Utah, and Wyoming

Locatable mineral assessment tracts, along with fundamental geological, mineral and energy resource data used in the assessment.

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Cobalt—Styles of deposits and the search for primary deposits

Cobalt (Co) is a potentially critical mineral. The vast majority of cobalt is a byproduct of copper and (or) nickel production. Cobalt is increasingly used in magnets and rechargeable batteries. More than 50 percent of primary cobalt production is from th

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Sandstone copper assessment of the Chu-Sarysu Basin, Central Kazakhstan

This study delineated permissive areas for undiscovered sandstone copper deposits, compiled a database of known deposits and significant prospects, estimated undiscovered deposits within those areas and made probabilistic estimates of their metal content.

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Porphyry copper assessment of eastern Australia

Delineated permissive areas for undiscovered porphyry copper deposits, compiled a database of known deposits and significant prospects, estimated undiscovered deposits within those areas and made probabilistic estimates of their metal content.

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Global assessment of undiscovered copper resources

Deposits, prospects, and permissive tracts for porphyry and sediment-hosted copper resources worldwide, with estimates of undiscovered copper resources.

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Spatial database for a global assessment of undiscovered copper resources

Permissive tracts for porphyry coppper and sediment-hosted copper worldwide, with known deposits and results of the assessment.

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Porphyry copper assessment of western Central Asia

With extensive geological and mineral resource information here, we estimated a mean of 25 undiscovered deposits of this type in this area, with a mean estimate of 95 million metric tons of copper.

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Sandstone copper assessment of the Teniz Basin, Kazakhstan

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Missouri Breaks Project, Montana - Digitized aeromagnetic data

Previously created but unpublished map sheets were scanned, registered, and the contours were digitized. The point data released here were extracted from the digitized contour lines and include: latitude, longitude, and magnetic-field value (gamma). Data are provided in a fixed-field columnar text format.

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Porphyry copper assessment of East and Southeast Asia: Philippines, Taiwan (Republic of China), Republic of Korea (South Korea), and Japan

This study delineated permissive areas for undiscovered porphyry copper deposits, compiled a database of known deposits and significant prospects, estimated undiscovered deposits within those areas and made probabilistic estimates of their metal content.

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Descriptive models, grade-tonnage relations, and databases for the assessment of sediment-hosted copper deposits--with emphasis on deposits in the Central Africa Copperbelt, Democratic Republic of the Congo and Zambia

This report describes compilation and evaluation results of data from the USGS global mineral assessment including new descriptive mineral-deposit and grade and tonnage models and spatial databases for deposits and occurrences, ore bodies and open pits.

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Porphyry copper assessment of Southeast Asia and Melanesia

This study delineated permissive areas for undiscovered porphyry copper deposits, compiled a database of known deposits and significant prospects, estimated undiscovered deposits within those areas and made probabilistic estimates of their metal content.

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Locatable Mineral Assessment Tracts for the U.S. Geological Survey Sagebrush Mineral Resource Assessment Project

Locatable mineral resource assessment tracts (tracts of land) associated with the Department of the Interior (DOI) Sagebrush Focal Areas in Montana, Wyoming and Utah, central Idaho, and the Oregon-Nevada-Idaho border area. Data are provided in Esri file geodatabase and shapefile formats.

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