Identification_Information: Citation: Citation_Information: Originator: Burns, L.E. Originator: Geoterrex-Dighem Originator: WGM, Inc. Originator: Emond, A.M. Originator: Graham, G.R.C. Publication_Date: 2014 Title: Iron Creek airborne electromagnetic and magnetic geophysical survey data compilation Geospatial_Data_Presentation_Form: digital, data Series_Information: Series_Name: Geophysical Report Issue_Identification: GPR 2014-6 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Online_Linkage: https://doi.org/10.14509/27360 Description: Abstract: The Iron Creek electromagnetic and magnetic airborne geophysical survey area is located in Alaska in the Yentna-Cache Creek mining district, about 90 kilometers north-northeast of Anchorage, Alaska. Frequency domain electromagnetic and magnetic data were collected with the DIGHEMV system from August 6 to 24, 1997. A total of 5103 line kilometers were collected covering 1852 square kilometers. Line spacing was 400 meters (m). Data were collected an average of 36 m above the ground surface from a helicopter towed sensor platform ("bird") on a 30 m long line. The data, as well as additional metadata, are available from the DGGS website: http://doi.org/10.14509/27360. Purpose: This airborne geophysical survey is part of a program to acquire data on Alaska's most promising mineral belts and districts. The information acquired is aimed at catalyzing new private sector exploration, discovery, and ultimate development and production. The purpose of the survey was to map the magnetic and conductive properties of the survey area. Supplemental_Information: >ascii_data: ASCII format line data, other ASCII data >databases_geosoft: Geosoft format database of line data, other Geosoft format databases >documents: Project and field reports, survey background information, gridded data explanations, other supporting documentation >grids_ermapper: Geographically registered gridded data, ER Mapper ERS format >grids_geosoft: Geosoft-format binary grids, these grids can be viewed in ESRI ArcMap using a free plugin from Geosoft or using the free viewer available from Geosoft >images_registered: GeoTiff format images of all gridded data >kmz: Keyhole markup language (kml) kmz archive files of project data. Viewable in Google Earth and other compatible programs >maps_hpp_format: Printable maps in HPGL/2 printer file format with extension .hpp >maps_pdf_format: Printable maps in pdf format >profiles_stacked: Distance-based profiles of the digitally recorded geophysical data are generated and plotted at an appropriate scale. The profiles display electromagnetic anomalies with their respective interpretive symbols >vector_data: Line path, data contours, and survey boundary in ESRI shapefile (SHP) format, ESRI Geodatabase format, and/or AutoCAD dxf format Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1997 Currentness_Reference: ground condition Status: Progress: complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -149.650676 East_Bounding_Coordinate: -148.318240 North_Bounding_Coordinate: 62.720974 South_Bounding_Coordinate: 62.244375 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Theme_Keyword: Aeromagnetic Theme_Keyword: Aeromagnetic Data Theme_Keyword: Aeromagnetic Map Theme_Keyword: Airborne Geophysical Survey Theme_Keyword: Analytic Signal Theme_Keyword: Apparent Resistivity Data Theme_Keyword: Apparent Resistivity Map Theme_Keyword: Apparent Resistivity Survey Theme_Keyword: DIGHEM-V EM System Theme_Keyword: Electromagnetic Anomalies Theme_Keyword: Electromagnetic Data Theme_Keyword: Electromagnetic Survey Theme_Keyword: First Vertical Derivative Theme_Keyword: Geophysical Map Theme_Keyword: Geophysical Survey Theme_Keyword: Geophysics Theme_Keyword: Geophysics Search Tag Theme_Keyword: Gridded Data Theme_Keyword: HEM Survey Theme_Keyword: HFEM Survey Theme_Keyword: Line Data Theme_Keyword: Magnetic Contours Theme_Keyword: Magnetic Data Theme_Keyword: Magnetic Survey Theme_Keyword: Magnetics Theme_Keyword: Raster Image Theme_Keyword: Resistivity Theme_Keyword: Strategic Minerals Place: Place_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Place_Keyword: Alaska, State of Place_Keyword: Cache Creek Place_Keyword: Daneka Lake Place_Keyword: Diana Lakes Place_Keyword: Disappointment Creek Place_Keyword: Game Lake Place_Keyword: Hyphen Gulch Place_Keyword: Iron Creek Place_Keyword: Prairie Creek Place_Keyword: Prospect Creek Place_Keyword: Rainbow Lake Place_Keyword: Sheep Creek Place_Keyword: Sheep River Place_Keyword: Talkeetna Mountains Place_Keyword: Talkeetna Mountains Quadrangle Place_Keyword: Talkeetna River Place_Keyword: Tsisi Creek Place_Keyword: Valdez Creek Mining District Place_Keyword: Wells Mountain Place_Keyword: Yentna Mining District Stratum: Stratum_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Stratum_Keyword: Peninsula Terrane Stratum_Keyword: Wrangellia Terrane 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: Funding was provided by the Alaska State Legislature as part of the DGGS Airborne Geophysical/Geological Mineral Inventory (AGGMI) program. Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Geophysical data were acquired according to the contractor, contract, and request-for-proposals specifications. For additional detail about survey parameters, see the accompanying project report available in the documents directory of this data distribution package. Logical_Consistency_Report: Data originate from one company using the same contract specifications for all data. The originating coordinate system was retained for all publication products. Completeness_Report: This data set includes files that contain processed aeromagnetic measurements, electromagnetic measurements, altimetry measurements, and locational data for the entire survey area. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Station coordinates were positioned using a real-time or post-processed corrected differential GPS. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Not applicable Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Burns, L.E. Originator: Liss, S.A. Publication_Date: 1998 Title: Portfolio of aeromagnetic and resistivity maps of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral Alaska Series_Information: Series_Name: Public Data File Issue_Identification: PDF 98-6 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 16 p., 1 sheet Online_Linkage: https://doi.org/10.14509/1819 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: Burns, L.E. and Liss, S.A., 1998 Source_Contribution: Legacy data compilation Source_Information: Source_Citation: Citation_Information: Originator: DGGS Staff Originator: Geoterrex-Dighem Originator: WGM, Inc. Publication_Date: 1998 Title: 7200 Hz coplanar resistivity of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral Alaska Series_Information: Series_Name: Public Data File Issue_Identification: PDF 98-5 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 2 sheets, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/1818 Source_Scale_Denominator: 63360 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: DGGS Staff and others, 1998 Source_Contribution: Legacy data compilation Source_Information: Source_Citation: Citation_Information: Originator: DGGS Staff Originator: Geoterrex-Dighem Originator: WGM, Inc. Publication_Date: 1998 Title: 7200 Hz coplanar resistivity of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 98-3 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 2 sheets, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/2579 Source_Scale_Denominator: 63360 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: DGGS Staff and others, 1998 Source_Contribution: Legacy data compilation Source_Information: Source_Citation: Citation_Information: Originator: DGGS Staff Originator: Geoterrex-Dighem Originator: WGM, Inc. Publication_Date: 1998 Title: 900 Hz coplanar resistivity of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral Alaska Series_Information: Series_Name: Public Data File Issue_Identification: PDF 98-4 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 2 sheets, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/1869 Source_Scale_Denominator: 63360 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: DGGS Staff and others, 1998 Source_Contribution: Legacy data compilation Source_Information: Source_Citation: Citation_Information: Originator: DGGS Staff Originator: Geoterrex-Dighem Originator: WGM, Inc. Publication_Date: 1998 Title: 900 Hz coplanar resistivity of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 98-2 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 2 sheets, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/2578 Source_Scale_Denominator: 63360 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: DGGS Staff and others, 1998 Source_Contribution: Legacy data compilation Source_Information: Source_Citation: Citation_Information: Originator: DGGS Staff Originator: Geoterrex-Dighem Originator: WGM, Inc. Publication_Date: 1998 Title: CD-ROM containing gridded files and section lines of 1997 geophysical survey data for Iron Creek area, Talkeetna Mountains Quadrangle, southcentral Alaska Series_Information: Series_Name: Public Data File Issue_Identification: PDF 98-8 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/10.14509/1821 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: DGGS Staff and others, 1998 Source_Contribution: Legacy data compilation Source_Information: Source_Citation: Citation_Information: Originator: DGGS Staff Originator: Geoterrex-Dighem Originator: WGM, Inc. Publication_Date: 1998 Title: CD-ROM containing profile and gridded data and section lines of the 1997 geophysical survey data for Iron Creek area, Talkeetna Mountains Quadrangle, southcentral Alaska Series_Information: Series_Name: Public Data File Issue_Identification: PDF 98-9 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/10.14509/1822 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: DGGS Staff and others, 1998 Source_Contribution: Legacy data compilation Source_Information: Source_Citation: Citation_Information: Originator: DGGS Staff Originator: Geoterrex-Dighem Originator: WGM, Inc. Publication_Date: 1998 Title: Flight lines of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral Alaska Series_Information: Series_Name: Public Data File Issue_Identification: PDF 98-1 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 2 sheets, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/1815 Source_Scale_Denominator: 63360 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: DGGS Staff and others, 1998 Source_Contribution: Legacy data compilation Source_Information: Source_Citation: Citation_Information: Originator: DGGS Staff Originator: Geoterrex-Dighem Originator: WGM, Inc. Publication_Date: 1998 Title: Total field magnetics and detailed electromagnetic anomalies of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral Alaska (part of C-4) Series_Information: Series_Name: Public Data File Issue_Identification: PDF 98-18B Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 sheet, scale 1:31,680 Online_Linkage: https://doi.org/10.14509/1839 Source_Scale_Denominator: 31680 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: DGGS Staff and others, 1998 Source_Contribution: Legacy data compilation Source_Information: Source_Citation: Citation_Information: Originator: DGGS Staff Originator: Geoterrex-Dighem Originator: WGM, Inc. Publication_Date: 1998 Title: Total field magnetics and detailed electromagnetic anomalies of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral Alaska (part of C-5) Series_Information: Series_Name: Public Data File Issue_Identification: PDF 98-18A Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 sheet, scale 1:31,680 Online_Linkage: https://doi.org/10.14509/1838 Source_Scale_Denominator: 31680 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: DGGS Staff and others, 1998 Source_Contribution: Legacy data compilation Source_Information: Source_Citation: Citation_Information: Originator: DGGS Staff Originator: Geoterrex-Dighem Originator: WGM, Inc. Publication_Date: 1998 Title: Total field magnetics and detailed electromagnetic anomalies of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral Alaska (parts of C-3 and C-4) Series_Information: Series_Name: Public Data File Issue_Identification: PDF 98-18C Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 sheet, scale 1:31,680 Online_Linkage: https://doi.org/10.14509/1840 Source_Scale_Denominator: 31680 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: DGGS Staff and others, 1998 Source_Contribution: Legacy data compilation Source_Information: Source_Citation: Citation_Information: Originator: DGGS Staff Originator: Geoterrex-Dighem Originator: WGM, Inc. Publication_Date: 1998 Title: Total field magnetics and electromagnetic anomalies of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral Alaska (clear diazo film version) Series_Information: Series_Name: Public Data File Issue_Identification: PDF 98-2 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 2 sheets, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/1816 Source_Scale_Denominator: 63360 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: DGGS Staff and others, 1998 Source_Contribution: Legacy data compilation Source_Information: Source_Citation: Citation_Information: Originator: DGGS Staff Originator: Geoterrex-Dighem Originator: WGM, Inc. Publication_Date: 1998 Title: Total field magnetics and electromagnetic anomalies of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral Alaska (part of B-3 and B-4) Series_Information: Series_Name: Public Data File Issue_Identification: PDF 98-18G Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 sheet, scale 1:31,680 Online_Linkage: https://doi.org/10.14509/1844 Source_Scale_Denominator: 31680 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: DGGS Staff and others, 1998 Source_Contribution: Legacy data compilation Source_Information: Source_Citation: Citation_Information: Originator: DGGS Staff Originator: Geoterrex-Dighem Originator: WGM, Inc. Publication_Date: 1998 Title: Total field magnetics and electromagnetic anomalies of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral Alaska (part of B-4) Series_Information: Series_Name: Public Data File Issue_Identification: PDF 98-18F Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 sheet, scale 1:31,680 Online_Linkage: https://doi.org/10.14509/1843 Source_Scale_Denominator: 31680 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: DGGS Staff and others, 1998 Source_Contribution: Legacy data compilation Source_Information: Source_Citation: Citation_Information: Originator: DGGS Staff Originator: Geoterrex-Dighem Originator: WGM, Inc. Publication_Date: 1998 Title: Total field magnetics and electromagnetic anomalies of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral Alaska (part of B-5 and B-6) Series_Information: Series_Name: Public Data File Issue_Identification: PDF 98-18D Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 sheet, scale 1:31,680 Online_Linkage: https://doi.org/10.14509/1841 Source_Scale_Denominator: 31680 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: DGGS Staff and others, 1998 Source_Contribution: Legacy data compilation Source_Information: Source_Citation: Citation_Information: Originator: DGGS Staff Originator: Geoterrex-Dighem Originator: WGM, Inc. Publication_Date: 1998 Title: Total field magnetics and electromagnetic anomalies of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral Alaska (part of B-5) Series_Information: Series_Name: Public Data File Issue_Identification: PDF 98-18E Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 sheet, scale 1:31,680 Online_Linkage: https://doi.org/10.14509/1842 Source_Scale_Denominator: 31680 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: DGGS Staff and others, 1998 Source_Contribution: Legacy data compilation Source_Information: Source_Citation: Citation_Information: Originator: DGGS Staff Originator: Geoterrex-Dighem Originator: WGM, Inc. Publication_Date: 1998 Title: Total field magnetics and electromagnetic anomalies of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral Alaska Series_Information: Series_Name: Public Data File Issue_Identification: PDF 98-3 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 2 sheets, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/1817 Source_Scale_Denominator: 63360 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: DGGS Staff and others, 1998 Source_Contribution: Legacy data compilation Source_Information: Source_Citation: Citation_Information: Originator: DGGS Staff Originator: Geoterrex-Dighem Originator: WGM, Inc. Publication_Date: 1998 Title: Total field magnetics of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 98-1 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 2 sheets, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/2577 Source_Scale_Denominator: 63360 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: DGGS Staff and others, 1998 Source_Contribution: Legacy data compilation Source_Information: Source_Citation: Citation_Information: Originator: Pritchard, R.A. Originator: Geoterrex-Dighem Publication_Date: 1998 Title: Project report of the 1997 geophysical survey data for Iron Creek area, Talkeetna Mountains Quadrangle, southcentral Alaska Series_Information: Series_Name: Public Data File Issue_Identification: PDF 98-7 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 313 p., 2 sheets, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/1820 Source_Scale_Denominator: 63360 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: Pritchard, R.A. and Geoterrex-Dighem, 1998 Source_Contribution: Legacy data compilation Process_Step: Process_Description: Raw and processed point data along flight lines - These data are directly provided by the contractor. Raw data are a direct export from field collection instruments. Final data are processed by method according to the contractor provided reports and process steps in this document. Process_Date: 1997 Process_Step: Process_Description: Geophysical data - The geophysical data were acquired with a DIGHEM Process_Date: 1997 Process_Step: Process_Description: Total magnetic field data - The total magnetic field data were acquired with a sampling interval of 0.1 seconds, and were (1) corrected for diurnal variations by subtraction of the digitally recorded base station magnetic data, (2) leveled to the tie line data, and (3) interpolated onto a regular 100 m grid using a modified Akima (1970) technique. The regional variation (or IGRF gradient, 1995, updated to August, 1997) was removed from the leveled magnetic. The aeromagnetic data were interpolated onto a regular 100 m grid using a modified Akima (1970) technique. [Akima, H., 1970, A new method of interpolation and smooth curve fitting based on local procedures: Journal of the Association of Computing Machinery, v. 17, no. 4, p. 589 Process_Date: 1997 Process_Step: Process_Description: Inphase and quadrature components - The DIGHEM(V) EM system measured inphase and quadrature components at five frequencies. EM data were sampled at 0.1 second intervals. The EM inphase and quadrature data were drift corrected using base level data collected at high altitude (areas of no signal). Along Process_Date: 1997 Process_Step: Process_Description: Vector data in shape file format, examples: line path, data contours - These data were created by exporting data and interpretations to vector format. Process_Date: 1997 Process_Step: Process_Description: Project report, portfolio report, and other important documents - The project report, portfolio report, and other important documents were generated by the contractor, DGGS staff, or a combination. Process_Date: 1998 Process_Step: Process_Description: Legacy data compilation - DGGS staff compiled and organized previously published data and the originating data from the contractor. Print format maps of data in plotter file format were created by the contractor (1998) using data and interpretation products derived from the final ascii data. DGGS staff converted the hpp files into PDFs. Source_Used_Citation_Abbreviation: Burns, L.E. and Liss, S.A., 1998 Source_Used_Citation_Abbreviation: DGGS Staff and others, 1998 Source_Used_Citation_Abbreviation: DGGS Staff and others, 1998 Source_Used_Citation_Abbreviation: DGGS Staff and others, 1998 Source_Used_Citation_Abbreviation: DGGS Staff and others, 1998 Source_Used_Citation_Abbreviation: DGGS Staff and others, 1998 Source_Used_Citation_Abbreviation: DGGS Staff and others, 1998 Source_Used_Citation_Abbreviation: DGGS Staff and others, 1998 Source_Used_Citation_Abbreviation: DGGS Staff and others, 1998 Source_Used_Citation_Abbreviation: DGGS Staff and others, 1998 Source_Used_Citation_Abbreviation: DGGS Staff and others, 1998 Source_Used_Citation_Abbreviation: DGGS Staff and others, 1998 Source_Used_Citation_Abbreviation: DGGS Staff and others, 1998 Source_Used_Citation_Abbreviation: DGGS Staff and others, 1998 Source_Used_Citation_Abbreviation: DGGS Staff and others, 1998 Source_Used_Citation_Abbreviation: DGGS Staff and others, 1998 Source_Used_Citation_Abbreviation: DGGS Staff and others, 1998 Source_Used_Citation_Abbreviation: DGGS Staff and others, 1998 Source_Used_Citation_Abbreviation: Pritchard, R.A. and Geoterrex-Dighem, 1998 Process_Date: 2014 Process_Step: Process_Description: Data in Geosoft GDB format - These data were created by importing the final ascii data into Geosft Oasi Montaj v8.2 using the provided *.iO import file. Process_Date: 2014 Process_Step: Process_Description: Geographically registered gridded data in Geosft GRD format - These data were created by DGGS using the final ascii data. Geosft Oasis montaj v8.2 was used to create the grid files. 80 meter grid cell size and the minimum curvature operate were used in the production of these grids. Process_Date: 2014 Process_Step: Process_Description: Geographically registered gridded data in GeoTiff format - These data were created by DGGS using Geosft Oasis montaj v8.2. Geosoft grd files were displayed in Geosft and exported to GeoTiff. A matching colorbar for each grid was displayed in Geosoft and export as a GeoTiff. Process_Date: 2014 Process_Step: Process_Description: Google Earth KMZ files - Created Google Earth KMZ files from the Geosoft format gridded data using ESRI ArcMap 10.2.2. Process_Date: 2014 Process_Step: Process_Description: Boundary polygon - The boundary polygon was generated by loading the final line data in Geosoft Oasis montaj v8.4. No tie (control) line data were used in this process. The final magnetic data was gridded using the Minimum Curvature option with the following settings: grid cell size = 1/5 of line spacing, blanking distance = double the line spacing, cells to extend beyond data = 0. The polygon file was created using Grid Outline tool with edge resolution = 1. The polygon file was exported to ERSI shapefile. Process_Date: 2015 Process_Step: Process_Description: PDF map and profile update - Converted stacked profiles to PDF. Converted original plot file format maps to PDF. Updated publication. Process_Date: 2020 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: raster Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: 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 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: ascii_data Entity_Type_Definition: ASCII format line data, other ASCII data Entity_Type_Definition_Source: Geoterrex-Dighem and WGM, Inc. Entity_Attribute_Layer_Name: ascii_data Detailed_Description: Entity_Type: Entity_Type_Label: databases_geosoft Entity_Type_Definition: Geosoft format database of line data, other Geosoft format databases Entity_Type_Definition_Source: Geoterrex-Dighem and WGM, Inc. Entity_Attribute_Layer_Name: databases_geosoft Detailed_Description: Entity_Type: Entity_Type_Label: documents Entity_Type_Definition: Project and field reports, survey background information, gridded data explanations, other supporting documentation Entity_Type_Definition_Source: Geoterrex-Dighem and WGM, Inc. and Alaska Division of Geological & Geophysical Surveys (DGGS) Entity_Attribute_Layer_Name: documents Detailed_Description: Entity_Type: Entity_Type_Label: grids_ermapper Entity_Type_Definition: Geographically registered gridded data, ER Mapper ERS format Entity_Type_Definition_Source: Geoterrex-Dighem and WGM, Inc. and Alaska Division of Geological & Geophysical Surveys (DGGS) Entity_Attribute_Layer_Name: grids_ermapper Detailed_Description: Entity_Type: Entity_Type_Label: grids_geosoft Entity_Type_Definition: Geosoft-format binary grids, these grids can be viewed in ESRI ArcMap using a free plugin from Geosoft or using the free viewer available from Geosoft Entity_Type_Definition_Source: Geoterrex-Dighem and WGM, Inc. and Alaska Division of Geological & Geophysical Surveys (DGGS) Entity_Attribute_Layer_Name: grids_geosoft Detailed_Description: Entity_Type: Entity_Type_Label: images_registered Entity_Type_Definition: GeoTiff format images of all gridded data Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys (DGGS) Entity_Attribute_Layer_Name: images_registered Detailed_Description: Entity_Type: Entity_Type_Label: kmz Entity_Type_Definition: Keyhole markup language (kml) kmz archive files of project data. Viewable in Google Earth and other compatible programs Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys (DGGS) Entity_Attribute_Layer_Name: kmz Detailed_Description: Entity_Type: Entity_Type_Label: maps_hpp_format Entity_Type_Definition: Printable maps in HPGL/2 printer file format with extension .hpp Entity_Type_Definition_Source: Geoterrex-Dighem and WGM, Inc. Entity_Attribute_Layer_Name: maps_hpp_format Detailed_Description: Entity_Type: Entity_Type_Label: maps_pdf_format Entity_Type_Definition: Printable maps in pdf format Entity_Type_Definition_Source: Geoterrex-Dighem and WGM, Inc. Entity_Attribute_Layer_Name: maps_pdf_format Detailed_Description: Entity_Type: Entity_Type_Label: profiles_stacked Entity_Type_Definition: Distance-based profiles of the digitally recorded geophysical data are generated and plotted at an appropriate scale. The profiles display electromagnetic anomalies with their respective interpretive symbols Entity_Type_Definition_Source: Geoterrex-Dighem and WGM, Inc. Entity_Attribute_Layer_Name: profiles_stacked Detailed_Description: Entity_Type: Entity_Type_Label: vector_data Entity_Type_Definition: Line path, data contours, and survey boundary in ESRI shapefile (SHP) format, ESRI Geodatabase format, and/or AutoCAD dxf format Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys (DGGS) Entity_Attribute_Layer_Name: vector_data 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: GPR 2014-6 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: GeoTiff, ESRI shapefile, Geosoft binary grid (GRD), Microsoft Office documents, PDF (with or without georeferencing), ER Mapper ERS, ASCII text files (including CSV), Geosoft ASCII grid (GXF), Geosoft database, AutoCAD DXF, Geosoft plot file (PLT), Printer files (HPP, PRN, or other), digital images (multiple formats), georeferenced photos (multiple formats), digital video (multiple formats), Geosoft ASCII XYZ, Geosoft ASCII files (PLY, i0, EXP), and KMZ. Format_Version_Date: 20210923 Format_Information_Content: Airborne magnetic and radiometric geophysical survey data compilation Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.14509/27360 Fees: Free download Metadata_Reference_Information: Metadata_Date: 20210923 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