{"action":"create","ckan_id":null,"date_created":"Wed, 18 Mar 2026 06:14:35 GMT","date_finished":null,"harvest_job_id":"1e284e2c-942c-40e1-a831-c420bda7948f","harvest_source_id":"f4c7bbab-c7ef-4277-a7d3-c25b78854814","id":"94b306b4-4bc7-4730-b052-ed120d36274a","identifier":"https://dggs.alaska.gov/webpubs/metadata/GPR2014-6.xml","parent_identifier":null,"source_hash":"236dbf36745924abddcf9218cb6713a3429be85c472c1b8b7b0fdbfe5cb9d637","source_raw":"Burns, L.E.Geoterrex-DighemWGM, Inc.Emond, A.M.Graham, G.R.C.2014Iron Creek airborne electromagnetic and magnetic geophysical survey data compilationdigital, dataGeophysical ReportGPR 2014-6Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveyshttps://doi.org/10.14509/27360The 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.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.>ascii_data: ASCII format line data, other ASCII data\t\r\n>databases_geosoft: Geosoft format database of line data, other Geosoft format databases\t\r\n>documents: Project and field reports, survey background information, gridded data explanations, other supporting documentation\t\r\n>grids_ermapper: Geographically registered gridded data, ER Mapper ERS format\t\r\n>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\t\r\n>images_registered: GeoTiff format images of all gridded data\t\r\n>kmz: Keyhole markup language (kml) kmz archive files of project data. Viewable in Google Earth and other compatible programs\t\r\n>maps_hpp_format: Printable maps in HPGL/2 printer file format with extension .hpp\t\r\n>maps_pdf_format: Printable maps in pdf format\t\r\n>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\t\r\n>vector_data: Line path, data contours, and survey boundary in ESRI shapefile (SHP) format, ESRI Geodatabase format, and/or AutoCAD dxf format1997ground conditioncompleteNone planned-149.650676-148.31824062.72097462.244375ISO 19115 Topic CategorygeoscientificInformationAlaska Division of Geological & Geophysical SurveysAeromagneticAeromagnetic DataAeromagnetic MapAirborne Geophysical SurveyAnalytic SignalApparent Resistivity DataApparent Resistivity MapApparent Resistivity SurveyDIGHEM-V EM SystemElectromagnetic AnomaliesElectromagnetic DataElectromagnetic SurveyFirst Vertical DerivativeGeophysical MapGeophysical SurveyGeophysicsGeophysics Search TagGridded DataHEM SurveyHFEM SurveyLine DataMagnetic ContoursMagnetic DataMagnetic SurveyMagneticsRaster ImageResistivityStrategic MineralsAlaska Division of Geological & Geophysical SurveysAlaska, State ofCache CreekDaneka LakeDiana LakesDisappointment CreekGame LakeHyphen GulchIron CreekPrairie CreekProspect CreekRainbow LakeSheep CreekSheep RiverTalkeetna MountainsTalkeetna Mountains QuadrangleTalkeetna RiverTsisi CreekValdez Creek Mining DistrictWells MountainYentna Mining DistrictAlaska Division of Geological & Geophysical SurveysPeninsula TerraneWrangellia TerraneThis 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).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.Alaska Division of Geological & Geophysical SurveysMetadata Managermailing and physical
3354 College Road
FairbanksAK99709-3707USA(907)451-5020(907)451-5050dggspubs@alaska.gov8 am to 4:30 pm, Monday through Friday, except State holidaysPlease 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.Funding was provided by the Alaska State Legislature as part of the DGGS Airborne Geophysical/Geological Mineral Inventory (AGGMI) program.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.Data originate from one company using the same contract specifications for all data. The originating coordinate system was retained for all publication products.This data set includes files that contain processed aeromagnetic measurements, electromagnetic measurements, altimetry measurements, and locational data for the entire survey area.Station coordinates were positioned using a real-time or post-processed corrected differential GPS.Not applicableBurns, L.E.Liss, S.A.1998Portfolio of aeromagnetic and resistivity maps of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral AlaskaPublic Data FilePDF 98-6Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys16 p., 1 sheethttps://doi.org/10.14509/1819paper1998publication dateBurns, L.E. and Liss, S.A., 1998Legacy data compilationDGGS StaffGeoterrex-DighemWGM, Inc.19987200 Hz coplanar resistivity of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral AlaskaPublic Data FilePDF 98-5Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys2 sheets, scale 1:63,360https://doi.org/10.14509/181863360paper1998publication dateDGGS Staff and others, 1998Legacy data compilationDGGS StaffGeoterrex-DighemWGM, Inc.19987200 Hz coplanar resistivity of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral AlaskaReport of InvestigationRI 98-3Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys2 sheets, scale 1:63,360https://doi.org/10.14509/257963360paper1998publication dateDGGS Staff and others, 1998Legacy data compilationDGGS StaffGeoterrex-DighemWGM, Inc.1998900 Hz coplanar resistivity of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral AlaskaPublic Data FilePDF 98-4Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys2 sheets, scale 1:63,360https://doi.org/10.14509/186963360paper1998publication dateDGGS Staff and others, 1998Legacy data compilationDGGS StaffGeoterrex-DighemWGM, Inc.1998900 Hz coplanar resistivity of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral AlaskaReport of InvestigationRI 98-2Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys2 sheets, scale 1:63,360https://doi.org/10.14509/257863360paper1998publication dateDGGS Staff and others, 1998Legacy data compilationDGGS StaffGeoterrex-DighemWGM, Inc.1998CD-ROM containing gridded files and section lines of 1997 geophysical survey data for Iron Creek area, Talkeetna Mountains Quadrangle, southcentral AlaskaPublic Data FilePDF 98-8Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys1 DVDhttps://doi.org/10.14509/1821paper1998publication dateDGGS Staff and others, 1998Legacy data compilationDGGS StaffGeoterrex-DighemWGM, Inc.1998CD-ROM containing profile and gridded data and section lines of the 1997 geophysical survey data for Iron Creek area, Talkeetna Mountains Quadrangle, southcentral AlaskaPublic Data FilePDF 98-9Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys1 DVDhttps://doi.org/10.14509/1822paper1998publication dateDGGS Staff and others, 1998Legacy data compilationDGGS StaffGeoterrex-DighemWGM, Inc.1998Flight lines of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral AlaskaPublic Data FilePDF 98-1Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys2 sheets, scale 1:63,360https://doi.org/10.14509/181563360paper1998publication dateDGGS Staff and others, 1998Legacy data compilationDGGS StaffGeoterrex-DighemWGM, Inc.1998Total field magnetics and detailed electromagnetic anomalies of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral Alaska (part of C-4)Public Data FilePDF 98-18BFairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys1 sheet, scale 1:31,680https://doi.org/10.14509/183931680paper1998publication dateDGGS Staff and others, 1998Legacy data compilationDGGS StaffGeoterrex-DighemWGM, Inc.1998Total field magnetics and detailed electromagnetic anomalies of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral Alaska (part of C-5)Public Data FilePDF 98-18AFairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys1 sheet, scale 1:31,680https://doi.org/10.14509/183831680paper1998publication dateDGGS Staff and others, 1998Legacy data compilationDGGS StaffGeoterrex-DighemWGM, Inc.1998Total field magnetics and detailed electromagnetic anomalies of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral Alaska (parts of C-3 and C-4)Public Data FilePDF 98-18CFairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys1 sheet, scale 1:31,680https://doi.org/10.14509/184031680paper1998publication dateDGGS Staff and others, 1998Legacy data compilationDGGS StaffGeoterrex-DighemWGM, Inc.1998Total field magnetics and electromagnetic anomalies of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral Alaska (clear diazo film version)Public Data FilePDF 98-2Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys2 sheets, scale 1:63,360https://doi.org/10.14509/181663360paper1998publication dateDGGS Staff and others, 1998Legacy data compilationDGGS StaffGeoterrex-DighemWGM, Inc.1998Total field magnetics and electromagnetic anomalies of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral Alaska (part of B-3 and B-4)Public Data FilePDF 98-18GFairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys1 sheet, scale 1:31,680https://doi.org/10.14509/184431680paper1998publication dateDGGS Staff and others, 1998Legacy data compilationDGGS StaffGeoterrex-DighemWGM, Inc.1998Total field magnetics and electromagnetic anomalies of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral Alaska (part of B-4)Public Data FilePDF 98-18FFairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys1 sheet, scale 1:31,680https://doi.org/10.14509/184331680paper1998publication dateDGGS Staff and others, 1998Legacy data compilationDGGS StaffGeoterrex-DighemWGM, Inc.1998Total field magnetics and electromagnetic anomalies of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral Alaska (part of B-5 and B-6)Public Data FilePDF 98-18DFairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys1 sheet, scale 1:31,680https://doi.org/10.14509/184131680paper1998publication dateDGGS Staff and others, 1998Legacy data compilationDGGS StaffGeoterrex-DighemWGM, Inc.1998Total field magnetics and electromagnetic anomalies of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral Alaska (part of B-5)Public Data FilePDF 98-18EFairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys1 sheet, scale 1:31,680https://doi.org/10.14509/184231680paper1998publication dateDGGS Staff and others, 1998Legacy data compilationDGGS StaffGeoterrex-DighemWGM, Inc.1998Total field magnetics and electromagnetic anomalies of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral AlaskaPublic Data FilePDF 98-3Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys2 sheets, scale 1:63,360https://doi.org/10.14509/181763360paper1998publication dateDGGS Staff and others, 1998Legacy data compilationDGGS StaffGeoterrex-DighemWGM, Inc.1998Total field magnetics of the Iron Creek area, Talkeetna Mountains Quadrangle, southcentral AlaskaReport of InvestigationRI 98-1Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys2 sheets, scale 1:63,360https://doi.org/10.14509/257763360paper1998publication dateDGGS Staff and others, 1998Legacy data compilationPritchard, R.A.Geoterrex-Dighem1998Project report of the 1997 geophysical survey data for Iron Creek area, Talkeetna Mountains Quadrangle, southcentral AlaskaPublic Data FilePDF 98-7Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys313 p., 2 sheets, scale 1:63,360https://doi.org/10.14509/182063360paper1998publication datePritchard, R.A. and Geoterrex-Dighem, 1998Legacy data compilationRaw 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.1997Geophysical data - The geophysical data were acquired with a DIGHEM1997Total 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. 5891997Inphase 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). Along1997Vector data in shape file format, examples: line path, data contours - These data were created by exporting data and interpretations to vector format.1997Project 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.1998Legacy 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.Burns, L.E. and Liss, S.A., 1998DGGS Staff and others, 1998DGGS Staff and others, 1998DGGS Staff and others, 1998DGGS Staff and others, 1998DGGS Staff and others, 1998DGGS Staff and others, 1998DGGS Staff and others, 1998DGGS Staff and others, 1998DGGS Staff and others, 1998DGGS Staff and others, 1998DGGS Staff and others, 1998DGGS Staff and others, 1998DGGS Staff and others, 1998DGGS Staff and others, 1998DGGS Staff and others, 1998DGGS Staff and others, 1998DGGS Staff and others, 1998Pritchard, R.A. and Geoterrex-Dighem, 19982014Data 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.2014Geographically 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.2014Geographically 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.2014Google Earth KMZ files - Created Google Earth KMZ files from the Geosoft format gridded data using ESRI ArcMap 10.2.2.2014Boundary 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.2015PDF map and profile update - Converted stacked profiles to PDF. Converted original plot file format maps to PDF. Updated publication.2020rasterUniversal Transverse Mercator60.999600-1470500000.0000000coordinate pair.00000001.00000001MetersNAD27Clarke 18666378206.40000000037294.978698199999997ascii_dataASCII format line data, other ASCII dataGeoterrex-Dighem and WGM, Inc.ascii_datadatabases_geosoftGeosoft format database of line data, other Geosoft format databasesGeoterrex-Dighem and WGM, Inc.databases_geosoftdocumentsProject and field reports, survey background information, gridded data explanations, other supporting documentationGeoterrex-Dighem and WGM, Inc. and Alaska Division of Geological & Geophysical Surveys (DGGS)documentsgrids_ermapperGeographically registered gridded data, ER Mapper ERS formatGeoterrex-Dighem and WGM, Inc. and Alaska Division of Geological & Geophysical Surveys (DGGS)grids_ermappergrids_geosoftGeosoft-format binary grids, these grids can be viewed in ESRI ArcMap using a free plugin from Geosoft or using the free viewer available from GeosoftGeoterrex-Dighem and WGM, Inc. and Alaska Division of Geological & Geophysical Surveys (DGGS)grids_geosoftimages_registeredGeoTiff format images of all gridded dataAlaska Division of Geological & Geophysical Surveys (DGGS)images_registeredkmzKeyhole markup language (kml) kmz archive files of project data. Viewable in Google Earth and other compatible programsAlaska Division of Geological & Geophysical Surveys (DGGS)kmzmaps_hpp_formatPrintable maps in HPGL/2 printer file format with extension .hppGeoterrex-Dighem and WGM, Inc.maps_hpp_formatmaps_pdf_formatPrintable maps in pdf formatGeoterrex-Dighem and WGM, Inc.maps_pdf_formatprofiles_stackedDistance-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 symbolsGeoterrex-Dighem and WGM, Inc.profiles_stackedvector_dataLine path, data contours, and survey boundary in ESRI shapefile (SHP) format, ESRI Geodatabase format, and/or AutoCAD dxf formatAlaska Division of Geological & Geophysical Surveys (DGGS)vector_dataAlaska Division of Geological & Geophysical SurveysMetadata Managermailing and physical
3354 College Road
FairbanksAK99709-3707USA(907)451-5020(907)451-5050dggspubs@alaska.gov8 am to 4:30 pm, Monday through Friday, except State holidaysPlease 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.GPR 2014-6The 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.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.Contact DGGS for current pricingGeoTiff, 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.20210923Airborne magnetic and radiometric geophysical survey data compilationhttps://doi.org/10.14509/27360Free download20210923Alaska Division of Geological & Geophysical SurveysSimone MontayneMetadata Managermailing and physical
3354 College Road
FairbanksAK99709-3707USA(907)451-5020(907)451-5050dggspubs@alaska.gov8 am to 4:30 pm, Monday through Friday, except State holidaysFGDC Content Standard for Digital Geospatial MetadataFGDC-STD-001-1998If 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.https://dggs.alaska.gov/metadata/dggs.extdggs metadata extensions","source_transform":null,"status":"error"}