Identification_Information: Citation: Citation_Information: Originator: Szumigala, D.J. Originator: Newberry, R.J. Originator: Werdon, M.B. Originator: Athey, J.E. Originator: Flynn, R.L. Originator: Clautice, K.H. Publication_Date: 2002 Title: Bedrock geologic map of the Eagle A-1 Quadrangle, Fortymile mining district Geospatial_Data_Presentation_Form: geodatabase Series_Information: Series_Name: Preliminary Interpretive Report Issue_Identification: PIR 2002-1B Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 sheet, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/2864 Description: Abstract: Geologists from the Alaska Division of Geological & Geophysical Surveys (DGGS) conducted field investigations and geochemical rock sampling during the 1999, 2000, and 2001 field seasons to produce a 1:63,360 scale bedrock map of the Eagle A-1 Quadrangle, Alaska. Rock outcrop throughout the field area is limited; consequently, the map interpretation relies heavily on airborne magnetic and electromagnetic survey data and accompanying geochemical analysis of rock samples. Field investigations are part of a three-year mapping program to provide geologic ground truth for airborne geophysical surveys flown by DGGS in the Fortymile mining district during 1998. This work aims to build an improved understanding of the area's geology and controls on gold mineralization for purposes of exploration targeting and mineral-resource assessment. The complete report, geodatabase, and ESRI fonts and style files are available from the DGGS website: http://doi.org/10.14509/2864. Purpose: This project and resulting map and data are intended to provide a geologic map and geologic interpretation of a portion of the Fortymile mining district at 1:63,360 scale. Previous published geologic maps at a 1:63,360 scale of this area have been reconnaissance-level maps or only covered portions of the quadrangle. Mapping at 1:63,360 scale or greater detail is needed to identify geologic features that may relate to more regional structures, geologic units, or mineralization. These detailed observations are also critical to test or use in tectonic models and this map also provides a geologic base in which to interpret geochemical results from the concurrent DGGS rock sampling program. Supplemental_Information: This geodatabase is a digital geologic map produced by the Alaska Division of Geological & Geophysical Surveys. The features, fields, and allowable values for this geodatabase object are defined in Hendricks, M.D., Ekberg, P.G., Athey, J.E., Wyatt, W.C., Willingham, A.L., and Naibert, T.J., 2021, AK GeMS data dictionary: A description of the Alaska geologic mapping schema: Alaska Division of Geological & Geophysical Surveys Miscellaneous Publication 170, 10 p. https://doi.org/10.14509/30669, which is adapted from U.S. Geological Survey National Cooperative Geologic Mapping Program, 2020, GeMS (Geologic Map Schema) - A standard format for the digital publication of geologic maps: U.S. Geological Survey Techniques and Methods, Book 11, chap. B10, 74 p. https://doi.org//10.3133/tm11B10. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2001 Currentness_Reference: ground condition Status: Progress: complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -142.011317 East_Bounding_Coordinate: -141.000000 North_Bounding_Coordinate: 64.253103 South_Bounding_Coordinate: 63.996231 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Theme_Keyword: Bedrock Theme_Keyword: Bedrock Geologic Map Theme_Keyword: Bedrock Geology Theme_Keyword: Boundary Theme_Keyword: Geochronology Theme_Keyword: Geologic Map Theme_Keyword: Geology Theme_Keyword: Igneous Rocks Theme_Keyword: Klondike Series Theme_Keyword: Metamorphic Rocks Theme_Keyword: STATEMAP Project Theme_Keyword: The Great Dike Place: Place_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Place_Keyword: Alaska, State of Place_Keyword: Fortymile Mining District Place_Keyword: Fortymile River Place_Keyword: Jack Wade Junction Place_Keyword: Minchumina Basin Place_Keyword: Steele Creek Dome Place_Keyword: Taylor Highway Place_Keyword: Top of the World Highway Stratum: Stratum_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Stratum_Keyword: Fortymile River Assemblage Stratum_Keyword: Nasina Assemblage Stratum_Keyword: Seventymile Terrane Temporal: Temporal_Keyword_Thesaurus: Walker, J.D., Geissman, J.W., Bowring, S.A, and Babcock, L.E., comp., 2012, Geologic Time Scale v. 4.0: Geological Society of America Temporal_Keyword: Cenozoic Temporal_Keyword: Cretaceous Temporal_Keyword: Devonian Temporal_Keyword: Jurassic Temporal_Keyword: Mesozoic Temporal_Keyword: Mississippian Temporal_Keyword: Paleozoic Temporal_Keyword: Pennsylvanian Temporal_Keyword: Permian Temporal_Keyword: Tertiary Temporal_Keyword: Triassic 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. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Position: Metadata Manager Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907)451-5020 Contact_Facsimile_Telephone: (907)451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Contact_Instructions: Please view our website (https://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible. Data_Set_Credit: The geologic mapping was funded by the Alaska State Legislature through a Capital Improvement Project (Alaska Airborne Geophysical/Geological Mineral Inventory Program) and the general fund and through the U.S. Geological Survey STATEMAP program under U.S. Department of the Interior, U.S. Geological Survey, National Cooperative Geologic Mapping Program assistance award 01HQAG0054. 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. DGGS student interns and volunteers providing field assistance include Bryan A. Finseth (1999), Mark Mccrary (1999), J.C. Grady (2000), W.C. Munley (2000), and M.R. Johnson (2001). Milton A. Wiltse provided technical review of the maps. Cross_Reference: Citation_Information: Originator: DGGS Staff Originator: Szumigala, D.J. Publication_Date: 2000 Title: Alaska GeoSurvey News - Mineral-oriented geologic mapping of the Fortymile mining district Series_Information: Series_Name: Newsletter Issue_Identification: NL 2000-3 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 9 p Online_Linkage: https://doi.org/10.14509/14585 Cross_Reference: Citation_Information: Originator: Pinney, D.S. Publication_Date: 2001 Title: Engineering - geologic map of the Eagle A-2 Quadrangle, Fortymile mining district, Alaska Series_Information: Series_Name: Preliminary Interpretive Report Issue_Identification: PIR 2001-3D Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 sheet, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/2672 Cross_Reference: Citation_Information: Originator: Pinney, D.S. Publication_Date: 2001 Title: Surficial-geologic map of the Eagle A-2 Quadrangle, Fortymile mining district, Alaska Series_Information: Series_Name: Preliminary Interpretive Report Issue_Identification: PIR 2001-3C Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 sheet, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/2671 Cross_Reference: Citation_Information: Originator: Stevens, D.S.P. Publication_Date: 2012 Title: Engineering - geologic map of the Eagle A-1 Quadrangle, Fortymile mining district, Alaska Series_Information: Series_Name: Preliminary Interpretive Report Issue_Identification: PIR 2002-1D Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 sheet, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/24544 Cross_Reference: Citation_Information: Originator: Stevens, D.S.P. Originator: Burns, P.A.C. Publication_Date: 2010 Title: Surficial-geologic map of the Eagle A-1 Quadrangle, Fortymile mining district Series_Information: Series_Name: Preliminary Interpretive Report Issue_Identification: PIR 2002-1C Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 sheet, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/22081 Cross_Reference: Citation_Information: Originator: Szumigala, D.J. Originator: Newberry, R.J. Originator: Werdon, M.B. Originator: Athey, J.E. Originator: Stevens, D.S.P. Originator: Flynn, R.L. Originator: Clautice, K.H. Originator: Craw, P.A. Publication_Date: 2002 Title: Geologic map of the Eagle A-1 Quadrangle, Fortymile mining district Series_Information: Series_Name: Preliminary Interpretive Report Issue_Identification: PIR 2002-1A Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 sheet, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/2863 Cross_Reference: Citation_Information: Originator: Szumigala, D.J. Originator: Newberry, R.J. Originator: Werdon, M.B. Originator: Finseth, B.A. Originator: Pinney, D.S. Originator: Flynn, R.L. Publication_Date: 2000 Title: Major-oxide, minor-oxide, trace-element, and geochemical data from rocks collected in a portion of the Fortymile mining district, Alaska, 1999 Series_Information: Series_Name: Raw Data File Issue_Identification: RDF 2000-1 v. 1.0.1 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 24 p., 2 sheets, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/2727 Cross_Reference: Citation_Information: Originator: Szumigala, D.J. Originator: Newberry, R.J. Originator: Werdon, M.B. Originator: Finseth, B.A. Originator: Pinney, D.S. Publication_Date: 2000 Title: Preliminary bedrock geologic map of a portion of the Fortymile mining district, Alaska Series_Information: Series_Name: Preliminary Interpretive Report Issue_Identification: PIR 2000-6 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 sheet, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/2734 Cross_Reference: Citation_Information: Originator: Szumigala, D.J. Originator: Werdon, M.B. Originator: Newberry, R.J. Originator: Athey, J.E. Originator: Clautice, K.H. Originator: Flynn, R.L. Originator: Grady, J.C. Originator: Munly, W.C. Originator: Johnson, M.R. Publication_Date: 2002 Title: Major-oxide, minor-oxide, trace-element, rare-earth element, trace geochemical, and coal quality data from rocks collected in the Eagle and Tanacross quadrangles, Alaska in 1999, 2000, 2001 Series_Information: Series_Name: Raw Data File Issue_Identification: RDF 2002-1 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 35 p., 1 sheet, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/2866 Cross_Reference: Citation_Information: Originator: Werdon, M.B. Originator: Newberry, R.J. Originator: Szumigala, D.J. Originator: Pinney, D.S. Publication_Date: 2001 Title: Geologic map of the Eagle A-2 Quadrangle, Fortymile mining district, Alaska Series_Information: Series_Name: Preliminary Interpretive Report Issue_Identification: PIR 2001-3A Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 sheet, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/2669 Cross_Reference: Citation_Information: Originator: Werdon, M.B. Originator: Newberry, R.J. Originator: Szumigala, D.J. Publication_Date: 2001 Title: Bedrock geologic map of the Eagle A-2 Quadrangle, Fortymile mining district, Alaska Series_Information: Series_Name: Preliminary Interpretive Report Issue_Identification: PIR 2001-3B Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 sheet, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/2670 Cross_Reference: Citation_Information: Originator: Werdon, M.B. Originator: Szumigala, D.J. Originator: Newberry, R.J. Originator: Grady, J.C. Originator: Munly, W.C. Publication_Date: 2000 Title: Major-oxide, minor-oxide, trace-element, rare-earth element, and geochemical data from rocks collected in Eagle and Tanacross quadrangles, Alaska in 2000 Series_Information: Series_Name: Raw Data File Issue_Identification: RDF 2000-4 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 29 p., 3 sheets, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/2729 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Certainty in attribute interpretation varies throughout the map and is scale dependant. Attribute fields within each feature class record the author's degree of confidence in the existence or identity of applicable features. Logical_Consistency_Report: All polygon features were topologically validated according to specifications of the AK GeMS geologic mapping schema Completeness_Report: This publication is a DGGS Preliminary Interpretive Report (PIR). This category is intended for the timely release of maps and reports with preliminary interpretation of geology or analytical data. It includes reports by DGGS staff, scientists from other organizations, and contractor reports containing technical interpretations of analytical data. Maps and reports have been reviewed by one or two people for technical content. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Certainty in feature boundaries or location varies throughout the map. Data fields within each feature class and the accompanying orientation and location confidence lookup tables record the author's degree of confidence in the location of applicable features. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: DGGS Staff Originator: Geoterrex-Dighem Originator: Stevens Exploration Management Corp. Publication_Date: 1999 Title: CD-ROM containing profile and gridded data and section lines of the 1998 geophysical survey data for part of the Fortymile mining district, Alaska, southern Eagle and northern Tanacross quadrangles Series_Information: Series_Name: Public Data File Issue_Identification: PDF 99-9 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 DVD Online_Linkage: https://doi.org/10.14509/1886 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1999 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: DGGS Staff and others, 1999 Source_Contribution: Bedrock mapping Source_Information: Source_Citation: Citation_Information: Originator: Ekberg, P.G. Originator: Hendricks, M.D. Originator: Athey, J.E. Publication_Date: 2021 Title: AK GeMS symbology: A description of the AK GeMS style file Series_Information: Series_Name: Miscellaneous Publication Issue_Identification: MP 169 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 7 p Online_Linkage: https://doi.org/10.14509/30584 Type_of_Source_Media: digital Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2021 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Ekberg, P.G. and others, 2021 Source_Contribution: GeMS conversion Source_Information: Source_Citation: Citation_Information: Originator: Foster, H.L. Publication_Date: 1969 Title: Reconnaissance geology of the Eagle A-1 and A-2 quadrangles, Alaska Series_Information: Series_Name: Bulletin Issue_Identification: B 1271-G Publication_Information: Publication_Place: United States Publisher: U.S. Geological Survey Other_Citation_Details: p. G1-G30, 1 sheet, scale 1:63,360 Online_Linkage: https://dggs.alaska.gov/pubs/id/3658 Source_Scale_Denominator: 63360 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1969 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Foster, H.L., 1969 Source_Contribution: Bedrock mapping Source_Information: Source_Citation: Citation_Information: Originator: Gray, J.E. Originator: Riehle, J.R. Publication_Date: 1998 Title: Geologic studies in Alaska by the U.S. Geological Survey, 1996 Series_Information: Series_Name: Professional Paper Issue_Identification: P 1595 Publication_Information: Publication_Place: United States Publisher: U.S. Geological Survey Other_Citation_Details: 200 p Online_Linkage: https://dggs.alaska.gov/pubs/id/4025 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1998 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Gray, J.E. and Riehle, J.R., 1998 Source_Contribution: Bedrock mapping Source_Information: Source_Citation: Citation_Information: Originator: Hendricks, M.D. Originator: Ekberg, P.G. Originator: Athey, J.E. Originator: Wyatt, W.C. Publication_Date: 2020 Title: AK GeMS data dictionary: A description of the AK GeMS database schema Series_Information: Series_Name: Miscellaneous Publication Issue_Identification: MP 168 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Online_Linkage: https://doi.org/10.14509/30583 Type_of_Source_Media: digital Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2020 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Hendricks, M.D. and others, 2020 Source_Contribution: GeMS conversion Source_Information: Source_Citation: Citation_Information: Originator: Neuendorf, K.K.E. Originator: Mehl, J.P., Jr. Originator: Jackson, J.A. Publication_Date: 2011 Title: Glossary of Geology Publication_Information: Publication_Place: Alexandria, Virginia Publisher: American Geological Institute Other_Citation_Details: 799 p Online_Linkage: https://www.americangeosciences.org/pubs/glossary Type_of_Source_Media: digital Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2011 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Neuendorf, K.K.E. and others, 2011 Source_Contribution: GeMS conversion Source_Information: Source_Citation: Citation_Information: Originator: Newberry, R.J. Originator: Layer, P.W. Originator: Burleigh, R.E. Originator: Solie, D.N. Publication_Date: 1998 Title: New 40Ar/39Ar dates for intrusions and mineral prospects in the eastern Yukon-Tanana terrane, Alaska; regional patterns and significance Series_Information: Series_Name: Professional Paper Issue_Identification: P 1595 Publication_Information: Publication_Place: United States Publisher: U.S. Geological Survey Other_Citation_Details: p. 131-159 Online_Linkage: https://dggs.alaska.gov/pubs/id/4120 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1998 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Newberry, R.J. and others, 1998, p. 131-159 Source_Contribution: Bedrock mapping Source_Information: Source_Citation: Citation_Information: Originator: Szumigala, D.J. Originator: Newberry, R.J. Originator: Werdon, M.B. Originator: Athey, J.E. Originator: Flynn, R.L. Originator: Clautice, K.H. Publication_Date: 2002 Title: Bedrock geologic map of the Eagle A-1 Quadrangle, Fortymile mining district Series_Information: Series_Name: Preliminary Interpretive Report Issue_Identification: PIR 2002-1B Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 sheet, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/2864 Source_Scale_Denominator: 63360 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2002 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Szumigala, D.J. and others, 2002 Source_Contribution: Bedrock mapping Source_Information: Source_Citation: Citation_Information: Originator: Szumigala, D.J. Originator: Newberry, R.J. Originator: Werdon, M.B. Originator: Athey, J.E. Originator: Stevens, D.S.P. Originator: Flynn, R.L. Originator: Clautice, K.H. Originator: Craw, P.A. Publication_Date: 2002 Title: Geologic map of the Eagle A-1 Quadrangle, Fortymile mining district Series_Information: Series_Name: Preliminary Interpretive Report Issue_Identification: PIR 2002-1A Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 sheet, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/2863 Source_Scale_Denominator: 63360 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2002 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Szumigala, D.J. and others, 2002 Source_Contribution: Bedrock mapping Source_Information: Source_Citation: Citation_Information: Originator: Szumigala, D.J. Originator: Newberry, R.J. Originator: Werdon, M.B. Originator: Finseth, B.A. Originator: Pinney, D.S. Originator: Flynn, R.L. Publication_Date: 2000 Title: Major-oxide, minor-oxide, trace-element, and geochemical data from rocks collected in a portion of the Fortymile mining district, Alaska, 1999 Series_Information: Series_Name: Raw Data File Issue_Identification: RDF 2000-1 v. 1.0.1 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 24 p., 2 sheets, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/2727 Source_Scale_Denominator: 63360 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2000 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Szumigala, D.J. and others, 2000 Source_Contribution: Bedrock mapping Source_Information: Source_Citation: Citation_Information: Originator: Szumigala, D.J. Originator: Werdon, M.B. Originator: Newberry, R.J. Originator: Athey, J.E. Originator: Clautice, K.H. Originator: Flynn, R.L. Originator: Grady, J.C. Originator: Munly, W.C. Originator: Johnson, M.R. Publication_Date: 2002 Title: Major-oxide, minor-oxide, trace-element, rare-earth element, trace geochemical, and coal quality data from rocks collected in the Eagle and Tanacross quadrangles, Alaska in 1999, 2000, 2001 Series_Information: Series_Name: Raw Data File Issue_Identification: RDF 2002-1 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 35 p., 1 sheet, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/2866 Source_Scale_Denominator: 63360 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2002 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Szumigala, D.J. and others, 2002 Source_Contribution: Bedrock mapping Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey National Cooperative Geologic Mapping Program Publication_Date: 2020 Title: GeMS (Geologic Map Schema)—A standard format for the digital publication of geologic maps Series_Information: Series_Name: Techniques and Methods Issue_Identification: TM 11-B10 Publication_Information: Publication_Place: United States Publisher: U.S. Geological Survey Other_Citation_Details: 1 p Online_Linkage: https://dggs.alaska.gov/pubs/id/30585 Type_of_Source_Media: digital Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2020 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: U.S. Geological Survey National Cooperative Geologic Mapping Program, 2020 Source_Contribution: GeMS conversion Source_Information: Source_Citation: Citation_Information: Originator: Walker, J.D. Originator: Geissman, J.W. Originator: Bowring, S.A. Originator: Babcock, L.E. Publication_Date: 2018 Title: Geologic Time Scale v. 5.0 Publication_Information: Publication_Place: Boulder, CO Publisher: Geological Society of America Online_Linkage: https://www.geosociety.org/documents/gsa/timescale/timescl.pdf Type_of_Source_Media: digital Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2018 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Walker, J.D. and others, 2018 Source_Contribution: GeMS conversion Source_Information: Source_Citation: Citation_Information: Originator: Werdon, M.B. Originator: Newberry, R.J. Originator: Szumigala, D.J. Publication_Date: 2001 Title: Bedrock geologic map of the Eagle A-2 Quadrangle, Fortymile mining district, Alaska Series_Information: Series_Name: Preliminary Interpretive Report Issue_Identification: PIR 2001-3B Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 sheet, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/2670 Source_Scale_Denominator: 63360 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2001 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Werdon, M.B. and others, 2001 Source_Contribution: Bedrock mapping Source_Information: Source_Citation: Citation_Information: Originator: Werdon, M.B. Originator: Szumigala, D.J. Originator: Newberry, R.J. Originator: Grady, J.C. Originator: Munly, W.C. Publication_Date: 2000 Title: Major-oxide, minor-oxide, trace-element, rare-earth element, and geochemical data from rocks collected in Eagle and Tanacross quadrangles, Alaska in 2000 Series_Information: Series_Name: Raw Data File Issue_Identification: RDF 2000-4 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 29 p., 3 sheets, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/2729 Source_Scale_Denominator: 63360 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2000 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Werdon, M.B. and others, 2000 Source_Contribution: Bedrock mapping Source_Information: Source_Citation: Citation_Information: Originator: Wilson, F.H. Originator: Galloway, J.P. Publication_Date: 2002 Title: Studies by the U.S. Geological Survey in Alaska, 2000 Series_Information: Series_Name: Professional Paper Issue_Identification: P 1662 Publication_Information: Publication_Place: United States Publisher: U.S. Geological Survey Other_Citation_Details: 149 p Online_Linkage: https://dggs.alaska.gov/pubs/id/4050 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2002 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Wilson, F.H. and Galloway, J.P., 2002 Source_Contribution: Bedrock mapping Source_Information: Source_Citation: Citation_Information: Originator: Yeend, W.E. Publication_Date: 1996 Title: Gold placers of the historical Fortymile River region, Alaska Series_Information: Series_Name: Bulletin Issue_Identification: B 2125 Publication_Information: Publication_Place: United States Publisher: U.S. Geological Survey Other_Citation_Details: 75 p., 1 sheet, scale 1:63,360 Online_Linkage: https://dggs.alaska.gov/pubs/id/3781 Source_Scale_Denominator: 63360 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1996 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Yeend, W.E., 1996 Source_Contribution: Bedrock mapping Process_Step: Process_Description: Bedrock mapping - During the summers of 1999 through 2001, DGGS conducted a geologic field mapping project to provide geologic ground truth for airborne geophysical surveys flown in the Fortymile mining district in 1998. DGGS efforts are focused on determining and understanding the geologic framework of the Fortymile mining district, especially with respect to placer gold and lode mineral deposits. Fieldwork for bedrock investigations, including ridge traverses, roadcut investigations, and river exposures, was conducted for 374 person-days during the months of June through August in 1999 - 2001. Field notes and rock samples were collected at more than 3,880 stations throughout the quadrangle for bedrock investigations. Sixty person-days were spent on field investigations for the surficial geology. Bedrock mappers recorded observations on 1:50,000-scale topographic maps of the quadrangle. Stations were located using handheld GPS devices with location precision varying from 3 to 15 meters. Selected rock samples were analyzed for age and geochemical properties. Laboratory analyses were performed on rock samples collected during the fieldwork from July 1999 intermittently through April 2002. Published geochemical and age results are found in Newberry and others (1998), Szumigala and others (2000, 2002), Werdon and others (2000), Flynn and Newberry (2001), Layer and others (in prep.), and Day and others (in press). Unpublished laboratory results include petrographic work on thin sections and modal analysis of rock slabs stained for plagioclase and potassium feldspar. Results from major-oxide and trace-element geochemistry of igneous and metamorphic rocks were used to calculate CIPW Norms for use in classifying rocks according to established petrologic nomenclature. The map unit interpretation relies heavily on airborne magnetic and electromagnetic survey data and rock geochemistry. Source_Used_Citation_Abbreviation: DGGS Staff and others, 1999 Source_Used_Citation_Abbreviation: Foster, H.L., 1969 Source_Used_Citation_Abbreviation: Gray, J.E. and Riehle, J.R., 1998 Source_Used_Citation_Abbreviation: Newberry, R.J. and others, 1998, p. 131-159 Source_Used_Citation_Abbreviation: Szumigala, D.J. and others, 2002 Source_Used_Citation_Abbreviation: Szumigala, D.J. and others, 2002 Source_Used_Citation_Abbreviation: Szumigala, D.J. and others, 2000 Source_Used_Citation_Abbreviation: Szumigala, D.J. and others, 2002 Source_Used_Citation_Abbreviation: Werdon, M.B. and others, 2001 Source_Used_Citation_Abbreviation: Werdon, M.B. and others, 2000 Source_Used_Citation_Abbreviation: Wilson, F.H. and Galloway, J.P., 2002 Source_Used_Citation_Abbreviation: Yeend, W.E., 1996 Process_Date: 2001 Process_Step: Process_Description: Digital cartography - Bedrock data were compiled on multiple layers of stable mylar at 1:50,000 scale, with some information plotted at 1:25,000 scale for more detail and later transferred to 1:50,000-scale mylar layers. Data were queried from Microsoft Access 2000 databases, imported into GIS software, and plotted on mylar at 1:50,000 scale to answer specific geologic questions. Relevant information from all mylar layers was compiled onto one stable mylar sheet with abundant control points. The bedrock-geologic map compilation mylar was scanned by a large-format scanner and saved as a TIFF image. The TIFF image was registered into MapInfo Professional 6.5 with multiple registration points, and a registration error of approximately 2.7 meters (RMS error) was obtained. Geologic contacts and unit polygons were digitized using MapInfo Professional 6.5. and ArcInfo 7.0.4. GPS values of point features were imported from spreadsheets and coded according to the attribute specifications. Process_Date: 2001 Process_Step: Process_Description: Technical review - The geologic map was evaluated for technical content by geologists familiar with the map area, and reviewer feedback was incorporated into the final product. Process_Date: 2001 Process_Step: Process_Description: Data release - The report and map were published, and GIS products were compiled and released in shapefile format. Process_Date: 2001 Process_Step: Process_Description: GeMS conversion - The geologic and geographic features portrayed in this data distribution package were organized and attributed according to the AK GeMS geologic mapping schema and derivative files using the USGS GeMS standard were created. These revised data packages replace files provided in the initial, 2002, release. Source_Used_Citation_Abbreviation: Ekberg, P.G. and others, 2021 Source_Used_Citation_Abbreviation: Hendricks, M.D. and others, 2020 Source_Used_Citation_Abbreviation: Neuendorf, K.K.E. and others, 2011 Source_Used_Citation_Abbreviation: U.S. Geological Survey National Cooperative Geologic Mapping Program, 2020 Source_Used_Citation_Abbreviation: Walker, J.D. and others, 2018 Process_Date: 2021 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: vector Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 7 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -141 Latitude_of_Projection_Origin: 0 False_Easting: 500000.000000 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: .00000001 Ordinate_Resolution: .00000001 Planar_Distance_Units: Meters Geodetic_Model: Horizontal_Datum_Name: NAD27 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.40000000037 Denominator_of_Flattening_Ratio: 294.978698199999997 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: eagle_a1_bedrock_geology_ak_gems_db_pkg Entity_Type_Definition: geodatabase, layer files, style files, and fonts Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Entity_Attribute_Layer_Name: AK GeMS geodatabase package Detailed_Description: Entity_Type: Entity_Type_Label: eagle_a1_bedrock_geology_fed_gems_db_pkg Entity_Type_Definition: geodatabase, layer files, style files, and fonts Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Entity_Attribute_Layer_Name: Fed GeMS geodatabase package Detailed_Description: Entity_Type: Entity_Type_Label: eagle_a1_bedrock_geology_fed_gems_shapefile_pkg Entity_Type_Definition: shapefiles and open data files Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Entity_Attribute_Layer_Name: Fed GeMS shapefile package Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Position: Metadata Manager Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907)451-5020 Contact_Facsimile_Telephone: (907)451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Contact_Instructions: Please view our website (https://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible. Resource_Description: PIR 2002-1B Distribution_Liability: 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. Standard_Order_Process: Non-digital_Form: DGGS publications are available as free online downloads or you may purchase paper hard-copies or digital files on CD/DVD or other digital storage media by mail, phone, fax, or email from the DGGS Fairbanks office. To purchase this or other printed reports and maps, contact DGGS by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: Cash, check, money order, VISA, or MasterCard. Turnaround time is 1-2 weeks unless special arrangements are made and an express fee is paid. Shipping charge will be the actual cost of postage and will be added to the total amount due. Contact us for the exact shipping amount. Fees: Contact DGGS for current pricing Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: geodatabase Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.14509/2864 Fees: Free download Metadata_Reference_Information: Metadata_Date: 20210629 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Person: Simone Montayne Contact_Position: Metadata Manager Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907)451-5020 Contact_Facsimile_Telephone: (907)451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Use_Constraints: If the user has modified the data in any way they are obligated to describe the types of modifications they have performed in the supporting metadata file. User specifically agrees not to imply that changes they made were approved by the Alaska Department of Natural Resources or Division of Geological & Geophysical Surveys. Metadata_Extensions: Online_Linkage: https://dggs.alaska.gov/metadata/dggs.ext Profile_Name: dggs metadata extensions