Digital compilation of geochemical data for historical samples from occurrences of strategic and critical elements in Alaska: Part II - Platinum group elements (PGE)

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Frequently anticipated questions:


What does this data set describe?

Title:
Digital compilation of geochemical data for historical samples from occurrences of strategic and critical elements in Alaska: Part II - Platinum group elements (PGE)
Abstract:
The State of Alaska's Strategic and Critical Minerals (SCM) Assessment project, a State-funded Capital Improvement Project (CIP), is designed to evaluate Alaska's statewide potential for strategic and critical mineral resources. The SCM Assessment project is being implemented by the Alaska Division of Geological & Geophysical Surveys (DGGS), and involves obtaining new airborne-geophysical, geological, and geochemical data. For the geochemical part of the SCM Assessment project, thousands of geochemical-sample analyses and locations from historical U.S. Bureau of Mines (USBM), U.S. Geological Survey (USGS), Bureau of Land Management (BLM), DGGS, Alaska Territorial Department of Mines, Alaska Division of Mines and Minerals, and Bureau of Indian Affairs (BIA) reports are being compiled into digital format by DGGS. The objective is to update the State of Alaska's statewide digital geochemical database in order to more clearly identify areas with SCM potential. For this report, DGGS digitally compiled sample and analyses documentation, geochemical assays, and location information for more than 22,500 historical samples that were originally collected to investigate occurrences of strategic and critical elements throughout Alaska.
Supplemental_Information:
border:    Outline of the various study areas
pge-major-minor-oxide:    Historic major- and minor-oxide and trace-element analysis of geological samples and summary of analytical methods
pge-trace-element:    Historic trace-element analysis of geological samples and summary of analytical methods
  1. How should this data set be cited?

    Reioux, D.A., Werdon, M.B., Seitz, S.S., and Mulliken, K.M., 2016, Digital compilation of geochemical data for historical samples from occurrences of strategic and critical elements in Alaska: Part II - Platinum group elements (PGE): Raw Data File RDF 2016-12, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 2 p.

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -163.876773
    East_Bounding_Coordinate: -129.876898
    North_Bounding_Coordinate: 68.660839
    South_Bounding_Coordinate: 54.618540

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Beginning_Date: 1938
    Ending_Date: 2007
    Currentness_Reference: ground condition

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: report and digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a point data set.

    2. What coordinate system is used to represent geographic features?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.001. Longitudes are given to the nearest 0.001. Latitude and longitude values are specified in decimal degrees.

      The horizontal datum used is North American Datum of 1927.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.9786982.

  7. How does the data set describe geographic features?

    rdf2016-12-border
    Outline of the various study areas (Source: Alaska Division of Geological & Geophysical Surveys (DGGS))

    rdf2016-12-pge-major-minor-oxide, rdf2016-12-pge-major-minor-oxide-methods.csv
    Historic major- and minor-oxide and trace-element analysis of geological samples and summary of analytical methods (Source: This historic data was published in reports by U.S. Bureau of Mines (USBM), U.S. Geological Survey (USGS), Bureau of Land Management (BLM), DGGS, Alaska Territorial Department of Mines, Alaska Division of Mines and Minerals, and Bureau of Indian Affairs (BIA) reports and compiled by Alaska Division of Geological & Geophysical Surveys (DGGS) staff.)

    rdf2016-12-pge-trace-element.csv, rdf2016-12-pge-trace-element-methods.csv
    Historic trace-element analysis of geological samples and summary of analytical methods (Source: This historic data was published in reports by U.S. Bureau of Mines (USBM), U.S. Geological Survey (USGS), Bureau of Land Management (BLM), DGGS, Alaska Territorial Department of Mines, Alaska Division of Mines and Minerals, and Bureau of Indian Affairs (BIA) reports and compiled by Alaska Division of Geological & Geophysical Surveys (DGGS) staff.)


Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

    The State of Alaska's Strategic and Critical Minerals (SCM) Assessment project is a State-funded Capital Improvement Project (CIP).

  3. To whom should users address questions about the data?

    Alaska Division of Geological & Geophysical Surveys
    GIS Manager
    3354 College Rd
    Fairbanks, AK 99709-3707
    USA

    907-451-5020 (voice)
    dggsgis@alaska.gov

    Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays


Why was the data set created?

This data compilation is a component of the State of Alaska's Strategic and Critical Minerals (SCM) Assessment project. For this report, DGGS digitally compiled sample and analyses documentation, geochemical assays, and location information for more than 22,500 historical samples that were originally collected to investigate occurrences of strategic and critical elements throughout Alaska. The objective is to update the State of Alaska's statewide digital geochemical database in order to more clearly identify areas with SCM potential.


How was the data set created?

  1. From what previous works were the data drawn?

    Barker, J.C., 1981 (source 1 of 27)
    Barker, J.C., 1981, Mineral investigations in the Porcupine River drainage, Alaska: Open-File Report OFR 27-81, U.S. Bureau of Mines, United States.

    Online Links:

    Other_Citation_Details: 189 p., 2 sheets, scale 1:250,000
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution: sample data compilation

    Barker, J.C., 1984 (source 2 of 27)
    Barker, J.C., 1984, Concentrations of cobalt and other metals in the western Crazy Mountains, interior Alaska: Open-File Report OFR 213-84, U.S. Bureau of Mines, United States.

    Online Links:

    Other_Citation_Details: 44 p
    Type_of_Source_Media: paper
    Source_Contribution: sample data compilation

    Barker, J.C., 1985 (source 3 of 27)
    Barker, J.C., 1985, Sampling and analytical results of a Mineral reconnaissance in the Selawik Hills area, northwestern Alaska: Open-File Report OFR 43-85, U.S. Bureau of Mines, United States.

    Online Links:

    Other_Citation_Details: 67 p
    Type_of_Source_Media: paper
    Source_Contribution: sample data compilation

    Barker, J.C., 1991 (source 4 of 27)
    Barker, J.C., 1991, Investigations of rare-earth and associated elements, Zane Hills pluton, northwestern Alaska: Open-File Report OFR 36-91, U.S. Bureau of Mines, United States.

    Online Links:

    Other_Citation_Details: 33 p
    Type_of_Source_Media: paper
    Source_Contribution: sample data compilation

    Barker, J.C. and Clautice, K.H., 1977 (source 5 of 27)
    Barker, J.C., and Clautice, K.H., 1977, Anomalous uranium concentrations in artesian springs and stream sediments in the Mount Prindle area, Alaska: Open-File Report OFR 130-77, U.S. Bureau of Mines, United States.

    Online Links:

    Other_Citation_Details: 19 p
    Type_of_Source_Media: paper
    Source_Contribution: sample data compilation

    Barker, J.C. and Lamal, Kathryn, 1988 (source 6 of 27)
    Barker, J.C., and Lamal, Kathryn, 1988, Investigation of rare earth element occurrences near Kook Lake: Field Report Barker, J.C. and Lamal, Kathryn, 1988, U.S. Bureau of Mines, United States.

    Online Links:

    Other_Citation_Details: 19 p
    Type_of_Source_Media: paper
    Source_Contribution: sample data compilation

    Barker, J.C. and Mardock, C.L., 1990 (source 7 of 27)
    Barker, J.C., and Mardock, C.L., 1990, Rare-earth element and yttrium-bearing dikes near Dora Bay, southern Prince of Wales Island, Alaska: Open-File Report OFR 19-90, U.S. Bureau of Mines, United States.

    Online Links:

    Other_Citation_Details: 41 p
    Type_of_Source_Media: paper
    Source_Contribution: sample data compilation

    Barker, J.C. and Roberts, W.S., 1985 (source 8 of 27)
    Barker, J.C., and Roberts, W.S., 1985, A copper-cobalt occurrence in the Cape Krusenstern area, northwestern Alaska: Open-File Report OFR 33-85, U.S. Bureau of Mines, United States.

    Online Links:

    Other_Citation_Details: 16 p
    Type_of_Source_Media: paper
    Source_Contribution: sample data compilation

    Barker, J.C. and Swainbank, R.C., 1985 (source 9 of 27)
    Barker, J.C., and Swainbank, R.C., 1985, A tungsten-rich porphyry molybdenum occurrence at Bear Mountain, northeast Alaska: Open-File Report OFR 8-85, U.S. Bureau of Mines, United States.

    Online Links:

    Other_Citation_Details: 64 p
    Type_of_Source_Media: paper
    Source_Contribution: sample data compilation

    Brosge, W.P. and others, 1977 (source 10 of 27)
    Brosge, W.P., Reiser, H.N., and Moore, T.E., 1977, Chemical analyses of 97 stream-sediment samples from the Coleen and Christian quadrangles, northern Alaska: Open-File Report OF 77-458, U.S. Geological Survey, United States.

    Online Links:

    Other_Citation_Details: 4 p., 1 sheet, scale 1:250,000
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution: sample data compilation

    Burleigh, R.E., 1991 (source 11 of 27)
    Burleigh, R.E., 1991, Evaluation of the tin-tungsten greisen Mineralization and associated granite at Sleitat Mountain, southwestern Alaska: Open-File Report OFR 35-91, U.S. Bureau of Mines, United States.

    Online Links:

    Other_Citation_Details: 41 p
    Type_of_Source_Media: paper
    Source_Contribution: sample data compilation

    Burleigh, R.E., 1992 (source 12 of 27)
    Burleigh, R.E., 1992, Examination of the Win Tin Prospect, west-central Alaska: Open-File Report OFR 92-92, U.S. Bureau of Mines, United States.

    Online Links:

    Other_Citation_Details: 23 p
    Type_of_Source_Media: paper
    Source_Contribution: sample data compilation

    Burleigh, R.E., 1992 (source 13 of 27)
    Burleigh, R.E., 1992, Tin Mineralization of the Won Prospect, west-central Alaska: Open-File Report OFR 85-92, U.S. Bureau of Mines, United States.

    Online Links:

    Other_Citation_Details: 21 p
    Type_of_Source_Media: paper
    Source_Contribution: sample data compilation

    Burton, P.J. and others, 1984 (source 14 of 27)
    Burton, P.J., Warner, J.D., and Barker, J.C., 1984, Reconnaissance investigation of tin occurrences at Rocky Mountain (Lime Peak), east-central Alaska: Open-File Report OFR 31-85, U.S. Bureau of Mines, United States.

    Online Links:

    Other_Citation_Details: 44 p
    Type_of_Source_Media: paper
    Source_Contribution: sample data compilation

    Clough, A.H. and Hayden, T.J., 1988 (source 15 of 27)
    Clough, A.H., and Hayden, T.J., 1988, 1985-1986 mineral investigations in the southern Chilkat Range, southeast Alaska: Open-File Report OFR 13-88, U.S. Bureau of Mines, United States.

    Online Links:

    Other_Citation_Details: 25 p., 3 sheets
    Type_of_Source_Media: paper
    Source_Contribution: sample data compilation

    Clough, A.H. and Redman, E.C., 1991, 44 p. (source 16 of 27)
    Clough, A.H., and Redman, E.C., 1991, Section C: West Lynn Canal subarea: Special Publication SP VOL. 2C, U.S. Bureau of Mines, United States.

    Online Links:

    Other_Citation_Details: 44 p
    Type_of_Source_Media: paper
    Source_Contribution: sample data compilation

    Foley, J.Y. and others, 1984 (source 17 of 27)
    Foley, J.Y., Hinderman, T., Kirby, D.E., and Mardock, C.L., 1984, Chromite occurrences in the Kaiyuh Hills, west-central Alaska: Open-File Report OFR 178-84, U.S. Bureau of Mines, United States.

    Online Links:

    Other_Citation_Details: 20 p
    Type_of_Source_Media: paper
    Source_Contribution: sample data compilation

    Foley, J.Y. and Barker, J.C., 1981 (source 18 of 27)
    Foley, J.Y., and Barker, J.C., 1981, Tungsten investigations near VABM Bend, eastern Alaska: Open-File Report OFR 29-81, U.S. Bureau of Mines, United States.

    Online Links:

    Other_Citation_Details: 24 p
    Type_of_Source_Media: paper
    Source_Contribution: sample data compilation

    Foley, J.Y. and Barker, J.C., 1986 (source 19 of 27)
    Foley, J.Y., and Barker, J.C., 1986, Uranium occurrences in the northern Darby Mountains, Seward Peninsula, Alaska: Information Circular IC 9103, U.S. Bureau of Mines, United States.

    Online Links:

    Other_Citation_Details: 27 p
    Type_of_Source_Media: paper
    Source_Contribution: sample data compilation

    Miller, T.P. and others, 1976 (source 20 of 27)
    Miller, T.P., Elliott, R.L., Finch, W.I., and Brooks, R.A., 1976, Preliminary report on uranium-, thorium-, and rare-earth-bearing rocks near Golovin, Alaska: Open-File Report OF 76-710, U.S. Geological Survey, United States.

    Online Links:

    Other_Citation_Details: 13 p
    Type_of_Source_Media: paper
    Source_Contribution: sample data compilation

    Reed, B.L. and Miller, T.P., 1980 (source 21 of 27)
    Reed, B.L., and Miller, T.P., 1980, Uranium and thorium content of some Tertiary granitic rocks in the southern Alaska Range: Open-File Report OF 80-1052, U.S. Geological Survey, United States.

    Online Links:

    Other_Citation_Details: 7 p
    Type_of_Source_Media: paper
    Source_Contribution: sample data compilation

    Southworth, D.D., 1984 (source 22 of 27)
    Southworth, D.D., 1984, Columbium in the gold- and tin-bearing placer deposits near Tofty, Alaska: Open-File Report OFR 174-84, U.S. Bureau of Mines, United States.

    Online Links:

    Other_Citation_Details: 21 p
    Type_of_Source_Media: paper
    Source_Contribution: sample data compilation

    Stablein, N.K., 1980 (source 23 of 27)
    Stablein, N.K., 1980, Report on the mineral resource investigations of six areas of central and northeastern Alaska, Contract No. GJ8X-33(80): Contract Report Stablein, N.K., 1980, U.S. Bureau of Mines, United States.

    Online Links:

    Other_Citation_Details: 188 p., 10 sheets, scale 1:250,000
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 250000
    Source_Contribution: sample data compilation

    Sutley, S.J. and others, 1987 (source 24 of 27)
    Sutley, S.J., Ryder, J.T., Light, T.D., and Weber, F.R., 1987, Analytical results and sample locality map of rock samples from the White Mountains Recreation Area, Livengood and Circle quadrangles, east-central Alaska: Open-File Report OF 87-284, U.S. Geological Survey, United States.

    Online Links:

    Other_Citation_Details: 61 p., 2 sheets, scale 1:63,360
    Type_of_Source_Media: paper
    Source_Scale_Denominator: 63360
    Source_Contribution: sample data compilation

    Warner, J.D. and others, 1988 (source 25 of 27)
    Warner, J.D., Dahlin, D.C., and Brown, L.L., 1988, Tin occurrences near Rocky Mountain (Lime Peak), east-central Alaska: Information Circular IC 9180, U.S. Bureau of Mines, United States.

    Online Links:

    Other_Citation_Details: 24 p
    Type_of_Source_Media: paper
    Source_Contribution: sample data compilation

    Warner, J.D. and others, 1986 (source 26 of 27)
    Warner, J.D., Mardock, C.L., and Dahlin, D.C., 1986, A columbium-bearing regolith on upper Idaho Gulch, near Tofty, Alaska: Information Circular IC 9105, U.S. Bureau of Mines, United States.

    Online Links:

    Other_Citation_Details: 29 p
    Type_of_Source_Media: paper
    Source_Contribution: sample data compilation

    Warner, J.D. and Dahlin, D.C., 1989 (source 27 of 27)
    Warner, J.D., and Dahlin, D.C., 1989, Tin occurrences associated with the Ohio Creek pluton, Chulitna region, south-central Alaska: Open-File Report OFR 5-89, U.S. Bureau of Mines, United States.

    Online Links:

    Other_Citation_Details: 29 p
    Type_of_Source_Media: paper
    Source_Contribution: sample data compilation

  2. How were the data generated, processed, and modified?

    Date: 2016 (process 1 of 1)
    Data compilation - Digital tables of geochemical-analytical data were compiled by DGGS for each sample, and where available, we included documentation of sample type and preparation methods, as well as the analytical method for each element (see digital files associated with this report). DGGS used optical character recognition (OCR) software to scan and extract data from paper or PDF versions of the reports. In many cases, the numerical-data and text conversions were only partially correct. Each OCR-derived digital table was carefully checked against the original report and corrected manually. Other tables were entered manually and then checked against the original report for possible errors. Great effort was made to interpret and correct obvious typographical errors in the original data, however, when no reasonable correction could be determined the original printed value was included in this digital data set. Data compiled includes: sample number, sample material, results of geochemical analyses by element, sample preparation, and analytical methods by element. Location data for each sample were derived by DGGS staff by scanning station-location map figures from individual reports, georegistering the map figures in ArcGIS v. 10.2.2, creating a point layer of station locations, extracting latitude-longitude coordinates, and linking them to their associated sample number in the geochemical-data tables.

  3. What similar or related data should the user be aware of?


How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

    Historical sample-collection and analytical procedures and vary considerably. Digital tables of geochemical-analytical data were compiled by DGGS for each sample, and where available, we included documentation of sample type and preparation methods, as well as the analytical method for each element. Great effort was made to interpret and correct obvious typographical errors in the original data, however, when no reasonable correction could be determined the original printed value was included in this digital data set. DGGS recommends that the reader of this report and the user of this data verify the location accuracy and the correctness of the analytical values represented in this report by using the original references. While DGGS has made every effort to ensure these data are clean, correct and error-free, the reader should understand that much of this information has been hand entered or digitized, and hand checked; processes that are never completely error-free. DGGS anticipates a few errors are present in this data and urges the user to check the accuracy of the information. We would appreciate learning of any errors encountered, so the source information can be continually upgraded.

  2. How accurate are the geographic locations?

    Location coordinates for each sample were derived by DGGS staff by scanning station-location map figures from individual reports, georegistering the map figures in ArcGIS v. 10.2.2, creating a point layer of station locations, extracting latitude-longitude coordinates, and linking them to their associated sample number in the geochemical data tables. The precision of the digitized points does not correctly reflect the actual accuracy of the locations. We estimate that most of the listed coordinates plot within 1000 meters of the actual sample location. To determine the horizontal accuracy of a specific data point, users should evaluate the methodology and level of detail provided in the originating reports and maps.

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

    This data release is complete.

  5. How consistent are the relationships among the observations, including topology?

    not applicable


How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints:
This report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below).
Use_Constraints:
Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.

  1. Who distributes the data set? (Distributor 1 of 1)

    Alaska Division of Geological & Geophysical Surveys
    3354 College Road
    Fairbanks, AK 99709-3707
    USA

    (907)451-5020 (voice)
    (907)451-5050 (FAX)
    dggspubs@alaska.gov

    Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays
    Contact_Instructions:
    Please view our website (<http://www.dggs.alaska.gov>) for the latest information on available data. Please contact us using the e-mail address provided above when possible.
  2. What's the catalog number I need to order this data set?

    RDF 2016-12

  3. What legal disclaimers am I supposed to read?

    The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.

  4. How can I download or order the data?


Who wrote the metadata?

Dates:
Last modified: 22-Dec-2016
Metadata author:
Alaska Division of Geological & Geophysical Surveys
Metadata Manager
3354 College Road
Fairbanks, AK 99709-3707
USA

(907)451-5020 (voice)

Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:


Generated by mp version 2.9.21 on Thu Dec 22 13:21:36 2016