Preliminary Geologic Map of the Fairbanks Mining District, Alaska

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Frequently-anticipated questions:


What does this data set describe?

Title:
Preliminary Geologic Map of the Fairbanks Mining District, Alaska
Abstract:
This preliminary geologic map of the Fairbanks mining district was mapped at 1:63,360 scale. The report describes the geologic setting, structural geology, earthquake potential, economic geology and the description of bedrock units.
Supplemental_Information:
The layers listed below are present as ArcGIS shape files. Attribute information for the following layers (entities) is included in this metadata file under the "Entity_and_Attribute_Information" section. Each layer is listed and described in detail under its own heading starting "Entity_Type_Label." Basic unit information is also included in the geologic unit code set file "PDF1996-16_codeset.pdf". Layers include:
fbxcline_arc    anticline and syncline traces of axial planes
fbxflt_arc    fault location traces and types
fbxgeo_arc    geologic units (arc)
fbxgeo_polygon    geologic units (polygon)
fbxgeou_arc    subsurface data extrapolated from geophysics data
fbxsamp_point    points of sample localities (Sheet 2)
fbxstrdip_point    point attribute table that displays strike and dip information
fbxstsym_point    points for the strike, dip, and plunge of bedding planes, foliation, and various lineaments
pingos_point    points of pingo localities
skpnts_point    points of skarn localities
  1. How should this data set be cited?

    Newberry, R.J., Bundtzen, T.K., Clautice, K.H., Combellick, R.A., Douglas, Tom, Laird, G.M., Liss, S.A., Pinney, D.S., Reifenstuhl, R.R., and Solie, D.N., 1996, Preliminary Geologic Map of the Fairbanks Mining District, Alaska: Public Data File PDF 96-16, State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys, Fairbanks, Alaska - USA.

    Online Links:

    Other_Citation_Details: 17 p., 2 sheets, scale 1:63,360

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -148.442995
    East_Bounding_Coordinate: -146.828401
    North_Bounding_Coordinate: 65.208488
    South_Bounding_Coordinate: 64.744542

  3. What does it look like?

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

    Beginning_Date: Jul-1995
    Ending_Date: Jul-1996
    Currentness_Reference: publication date

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

    Geospatial_Data_Presentation_Form: map, vector digital data

  6. How does the data set represent geographic features?

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

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

      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 6
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.999600
      Longitude_of_Central_Meridian: -147.000
      Latitude_of_Projection_Origin: 0.0
      False_Easting: 500000
      False_Northing: 0

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.000128
      Ordinates (y-coordinates) are specified to the nearest 0.000128
      Planar coordinates are specified in meters

      The horizontal datum used is D_Clarke_1866.
      The ellipsoid used is Clarke 1866.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.978698.

  7. How does the data set describe geographic features?

    fbxgeo_arc.shp
    Object type is vector, there are 3989 rows associated with this entity, and the entity values refer to geologic map unit contacts. (Source: Alaska Division of Geological & Geophysical Surveys)

    CODE
    Line symbol for geologic map unit contacts (Source: Alaska Division of Geological & Geophysical Surveys)

    Formal codeset
    Codeset Name:PDF1996-16_codeset.pdf
    Codeset Source:Alaska Division of Geological & Geophysical Surveys <http://www.dggs.dnr.state.ak.us/metadata/PDF1996-16_codeset.pdf>

    fbxgeo_polygon.shp
    Object type is vector, there are 1785 rows associated with this entity, and the entity values refer to the unit name abbreviations for each specific polygon represented on the map. (Source: Alaska Division of Geological & Geophysical Surveys)

    UNIT
    A unique three to four letter abbreviation given to each map unit represented on the map. Any unit ending with a "?" indicates uncertainty. (Source: Alaska Division of Geological and Geophysical Surveys)

    Formal codeset
    Codeset Name:PDF1996-16_codeset.pdf
    Codeset Source:Alaska Division of Geological & Geophysical Surveys <http://www.dggs.dnr.state.ak.us/metadata/PDF1996-16_codeset.pdf>

    MAT
    A unique three letter abbreviation given to each materials unit represented on the map. Any materials unit ending with a "?" indicates uncertainty. (Source: Alaska Division of Geological and Geophysical Surveys)

    Formal codeset
    Codeset Name:PDF1996-16_codeset.pdf
    Codeset Source:Alaska Division of Geological & Geophysical Surveys <http://www.dggs.dnr.state.ak.us/metadata/PDF1996-16_codeset.pdf>

    fbxgeou_arc.shp
    Object type is vector, there are 46 rows associated with this entity, and the entity values refer to subsurface data extrapolated from geophysics data. (Source: Alaska Division of Geological & Geophysical Surveys)

    CODE
    Types of faults found in the map area. (Source: Alaska Division of Geological and Geophysical Surveys)

    ValueDefinition
    1Solid contact
    2Sm. dashed contact
    4Dotted contact
    20Solid fault
    23Very sm. dashed fault
    103no line (hidden)
    998Fault/contacts

    UNIT
    A unique three to four letter abbreviation given to each map unit represented on the map. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    TbcConcealed Tertiary Basalt; See PDF1996-16_codeset.pdf

    fbxflt_arc.shp
    Object type is vector, there are 2092 rows associated with this entity, and the entity values refer to fault location traces and types. (Source: Alaska Division of Geological & Geophysical Surveys)

    CODE
    Types of faults found in the map area. (Source: Alaska Division of Geological and Geophysical Surveys)

    ValueDefinition
    10Solid anti/syncline
    20Solid fault
    21Dashed fault
    22Dotted fault
    23Very sm. dashed fault
    25Dash-? fault
    28Shear
    55Dash-? thrust fault
    71Dashed thrust fault
    73Dotted thrust fault
    997neatline (border)
    998Fault/contacts

    SPECIAL
    Map has not been cartographically reviewed. (Source: Alaska Division of Geological & Geophysical Surveys)

    ValueDefinition
    0High Angle Fault
    2Dashed line (Map has not been cartographically reviewed.)

    fbxcline_arc.shp
    Object type is vector, there are 46 rows associated with this entity, and the entity values refer to the anticline and syncline traces of axial planes. (Source: Alaska Division of Geological & Geophysical Surveys)

    CODE
    A number representing the anticline or syncline trace. (Source: Alaska Division of Geological and Geophysical Surveys)

    ValueDefinition
    10Solid anti/syncline
    11Sm. dashed anti/syncline
    13Dotted anti/syncline

    fbxstrdip_point.shp
    Object type is point, there are 443 rows associated with this entity, and the entity values refer to symbols for strike and dip information. (Source: Alaska Division of Geological & Geophysical Surveys)

    DIP
    Represents the dip angles used to produce the dip directions. (Source: Alaska Division of Geological and Geophysical Surveys)

    Range of values
    Minimum:0
    Maximum:90

    SYMBOL
    Represents the symbols used to describe the strike and dips of beds, cleavage, joints, and foliation. (Source: Alaska Division of Geological and Geophysical Surveys)

    ValueDefinition
    1Strike and direction of dip of beds.
    4Strike and dip of overturned beds.
    5Strike of vertical beds, stratigraphic tops to north.

    TYPE
    Strike and dip of foliation. Plain arrow shows direction and plunge of lineation. (Source: Alaska Division of Geological and Geophysical Surveys)

    ValueDefinition
    f0Arrow shows direction and plunge of secondary isoclinal fold.
    f1Arrow shows direction and plunge of secondary isoclinal fold.
    faplunge (Map has not been cartographically reviewed.)
    MLplunge (Map has not been cartographically reviewed.)

    fbxstsym_point.shp
    Object type is point, there are 92 rows associated with this entity, and the entity values refer to symbols for folds, anticlines, synclines, and bedding features. (Source: Alaska Division of Geological & Geophysical Surveys)

    CODE
    Used for differentiating structural symbol types. (Source: Alaska Division of Geological and Geophysical Surveys)

    ValueDefinition
    66Anticline and trace of axial plane.
    67Syncline and trace of axial plane.
    133Plunge
    145Strike-slip fault

    pingos_point.shp
    Object type is point, there are 27 rows associated with this entity, and the entity values refer to symbols for pingo localities. (Source: Alaska Division of Geological & Geophysical Surveys)

    SYMBOL
    This attribute represents the state of the pingo. (Source: Alaska Division of Geological and Geophysical Surveys)

    ValueDefinition
    140Pingo is collapsed
    141Pingo is intact (whole)

    UNIT
    This attribute represents the state of the pingo. (Source: Alaska Division of Geological and Geophysical Surveys)

    ValueDefinition
    pingocallPingo is collapsed
    pingowholePingo is intact (whole)

    skpnts_point.shp
    Object type is point, there are 9 rows associated with this entity, and the entity values refer to symbols for skarn localities. No attributes were manually assigned to this entity. (Source: Alaska Division of Geological & Geophysical Surveys)

    fbxsamp_point.shp
    Object type is point, there are 20 rows associated with this entity, and the entity values refer to points of sample localities on the map in sheet 2 of 2. (Source: Alaska Division of Geological & Geophysical Surveys)

    SAMPLE
    The name of the particular sample. (Source: Alaska Division of Geological and Geophysical Surveys)

    Location of a geologic measurement: YrAAA999X: Yr=2 digit year of sample collection, AA=geologist's initials (two characters), 999=unique station number. Geologists' initials are: BT - Tom Bundtzen, KC - Karen Clautice, RN - Rainer Newberry.


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?

    This project is part of the DGGS's Airborne Geophysical/Geological Mapping Program funded by the Alaska State Legislature and managed by State of Alaska, Department of Natural Resources (DNR), Division of Geological & Geophysical Surveys (DGGS). Partial funding was also provided through the U.S. Geological Survey's National Geologic Mapping Act-STATEMAP Program. The views and conclusions contained in this document are those of the authors and should not be interpreted as necessarily representing the official policies, either expressed or implied, of the U.S. government. Additional acknowledgments: Bedrock geology field investigations by: R. Newberry, T.K. Bundtzen, K.H. Clautice, R.R. Reifenstuhl, D.N. Solie, G.M. Laird, S.A. Liss, and T. Douglas in summer (1995); Surficial geology field investigations by: D.S. Pinney and R.A. Combellick in summer (1995,1996); Cartographic Design: G.R.C. Graham, D.S. Pinney, L.K. Queen, G.L. Laird and G. Davidson June 15th - July 5th (1996); Edited by: Paula Davis.

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

    State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys
    GIS Data Manager/Cartographer
    3354 College Road
    Fairbanks, AK 99709-3707
    USA

    (907) 451-5029 (voice)
    (907) 451-5050 (FAX)
    dggspubs@alaska.gov

    Contact_Instructions:
    You may view our web site at <http://www.dggs.dnr.state.ak.us> for the latest information on available data. Please e-mail your questions and data requests when possible since our web site and e-mail address will remain current even if our phone number and mailing address change.


Why was the data set created?

This project and resulting report, map and geospatial data are intended to provide an updated surficial and bedrock geologic map of the Fairbanks Mining District at 1:63,360 scale that depicts construction material availability, geologic hazards, mineral potential, and new geologic information. The Fairbanks mining district was originally mapped 15 years ago by Metz (1982), Robinson (1982), and Bundtzen (1982). The final map product was not published until 1990 (Robinson and others, 1990). The earlier work did not include surficial coverage and due to extensive cover the bedrock geology was based on only a few percent rock exposure.


How was the data set created?

  1. From what previous works were the data drawn?

    Robinson and others, 1990 (source 1 of 1)
    Robinson, M.S., Smith, T.E., and Metz, P.A., 1990, Bedrock Geology of the Fairbanks Mining District: Alaska: Professional Report PR 106, State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys, Fairbanks, AK, USA.

    Other_Citation_Details: 2 sheets, scale 1:63,360
    Type_of_Source_Media: paper map
    Source_Scale_Denominator: 63360
    Source_Contribution:
    This is a culmination of a series of mapping efforts and publications located within the Fairbanks Mining District.

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

    Date: 1996 (process 1 of 1)
    The geologic data included in this project were digitized from a mylar compilation of geologic field maps produced on USGS topo bases of the area. Map unit (polygon) locations and attributes were checked by two reviewers broadly familiar with the dominant geologic rock types in the Fairbanks area. Locations were determined visually using topographic maps at scales of 1:63,360 and 1:25,000. Geologic contacts, sample, and station locations were visually hand-plotted onto stable mylar bases from the field maps.

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

    Combellick, R.A., and Bundtzen, T.K., 1996, Preliminary Derivative Geologic Materials Map of the Fairbanks Mining District, Alaska: Public Data File PDF 96-17, State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys, Fairbanks, AK, USA.

    Online Links:

    Other_Citation_Details: 1 sheet, scale 1:63,360


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

  1. How well have the observations been checked?

    Geologic data were digitized from a mylar geologic compilation. This compilation was done on a one to one scale, stable mylar of the USGS topographic base for each of the 1:63,360 scale USGS topographic bases included in the map area. Geologic data included in the compilation are the field maps and notes from this project as well as data from other sources as noted in the "Sources Cited" section.

  2. How accurate are the geographic locations?

    Location data were determined visually using topographic maps at scales of 1:63,360 and larger. Altimeters were also used. GPS technology was not used to determine locations. Instead, geologic contacts, sample, and station locations were visually hand-plotted onto stable mylar bases from the field maps. The coordinates of sample and station locations were determined with a digitizing tablet. All samples plotted on the maps are included in the various tables.

  3. How accurate are the heights or depths?

    Thommen TM altimeters were frequently used and calibrated daily.

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

    This dataset includes geospatial information about geologic units, sample locations, structural features, structural measurements, pingo locations, and skarn locations.

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

    Polygon topology present and clean on appropriate data. Other data are line, point, or annotation data and do not require topologic relationships. Chain-node topology present.


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 data set are 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 data sets utilizing these data sets 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. User specifically agrees not to misrepresent these data sets, 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.

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

    State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys
    Natural Resource Technician
    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 web site (<http://www.dggs.dnr.state.ak.us>) 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?

    Public Data File 96-16

  3. What legal disclaimers am I supposed to read?

    The State of Alaska makes no express or implied warranties (including warranties of merchantability and fitness) with respect to the character, function, or capabilities of the electronic services 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, any failure thereof, or otherwise, and in no event will the State of Alaska's liability to the requester or anyone else exceed the fee paid for the electronic service or product.

  4. How can I download or order the data?

  5. What hardware or software do I need in order to use the data set?

    Please check the MapInfo web site (<http://www.mapinfo.com/>) for the latest documentation on importing ESRI shape files.


Who wrote the metadata?

Dates:
Last modified: 06-May-2008
Last Reviewed: 06-May-2008
To be reviewed: 20-Mar-2009
Metadata author:
State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys
Metadata Manager
3354 College Road
Fairbanks, AK 99709-3707
USA

907-451-5039 (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 contact us through the e-mail address above whenever possible.
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)


Generated by mp version 2.9.6 on Tue May 06 14:29:35 2008