f1c0b74d-1c26-4666-b0c6-dc58b17218d8_source eng; USA utf8 dataset Simone Montayne Alaska Division of Geological & Geophysical Surveys Metadata Manager (907)451-5020 (907)451-5050 3354 College Road Fairbanks AK 99709-3707 USA dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays pointOfContact 2019-07-26 ISO 19115 Geographic Information - Metadata ISO 19115:2003/Cor.1:2006(E) Alaska merged geophysical data grids 2016-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher DGGS Staff originator http://doi.org/10.14509/29555 DIGITAL DATA Digital Data Series DDS 12 Merged grids of residual magnetic intensity and apparent resistivity compiled from the East Styx, Farewell, Middle Styx, and Styx River geophysical surveys. This electromagnetic and magnetic airborne geophysical survey data compilation is a product of the Alaska Division of Geological & Geophysical Surveys' (DGGS) Airborne Geophysical/Geological Mineral Inventory (AGGMI) program and the Alaska Strategic and Critical Minerals Assessment Capital Improvement Project. The goal of the Alaska Division of Geological & Geophysical Surveys' (DGGS) Airborne Geophysical/Geological Mineral Inventory (AGGMI) program is to enhance the understanding of Alaska's mineral resources and stimulate private-sector mineral development. The program seeks to delineate mineral zones on Alaska State lands that: (1) have major economic value; (2) can be developed in the short term to provide high-quality jobs for Alaskans; and (3) will provide economic diversification to help offset the loss of Prudhoe Bay oil revenue. Candidate lands for this program are identified on the basis of existing geologic knowledge, land ownership, and nominations from Alaska's geologic community. The AGGMI program and resulting new geologic knowledge are recognized worldwide and have encouraged millions of dollars of venture capital expenditures in the local economies of the surveyed mining districts. These venture capital expenditures have led to discovery and delineation of new mineral resources. The multi-year Strategic and Critical Minerals Assessment Capital Improvement Project (SCMA) was established to determine Alaska's geologic potential for rare-earth elements and other minerals that are essential for our modern, technology-based society. This program began in FY2012 with a data survey and compilation of existing information on rare-earth-element occurrences in Alaska, and expanded significantly in FY2013 to include additional critical minerals, re-analyses of existing samples, and obtaining new field and analytical data, including airborne geophysics. Funding for the originating geophysical surveys was provided by the Alaska Division of Geological & Geophysical Surveys' (DGGS) Airborne Geophysical/Geological Mineral Inventory (AGGMI) program and the Alaska Strategic and Critical Minerals Assessment Capital Improvement Project. The geophysical surveys were managed by State of Alaska, Department of Natural Resources (DNR), Division of Geological & Geophysical Surveys (DGGS). These merged grids were generated as part of the East Styx data collection contract. The survey data were collected, processed, and/or compiled by Burns, Laurel E., Graham, G. R. C., Stevens Exploration Management Corp., Anglo American Exploration (USA), Inc., Fugro Airborne Surveys Corp., Fugro GeoServices, Inc., CGG, Emond, Abraham M., Barefoot, John Delton. planned Alaska Division of Geological & Geophysical Surveys Metadata Manager (907)451-5020 (907)451-5050 3354 College Road Fairbanks AK 99709-3707 USA dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays pointOfContact asNeeded Airborne Geophysical Survey Electromagnetic Data Electromagnetic Survey Geophysical Map Geophysical Survey Geophysics Geophysics Search Tag Gridded Data Magnetic Data Magnetic Survey Magnetics theme Alaska Division of Geological & Geophysical Surveys Alaska, State of place Alaska Division of Geological & Geophysical Surveys 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. otherRestrictions 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. otherRestrictions 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). Yukon - eastern Alaska magnetic grid 2015-01-01 publication Natural Resources Canada Canada publisher Geological Survey of Canada originator U.S. Geological Survey originator http://gdr.agg.nrcan.gc.ca/gdrdap/dap/index-eng.php?productid=1587 crossReference grid eng; USA geoscientificInformation -154.539294 -151.691417 61.511703 62.529860 2007-01-01 2013-01-01 >st_frl_mst_est: Geosoft format gridded data, ER Mapper format gridded data, ESRI ArcGIS shapefile, and keyhole markup language (.kml) data archive files. Note: these data are provided in both UTM Zone 5 - NAD27 and Geographic WGS84 projections. The data files were compiled from the East Styx, Farewell, Middle Styx, and Styx River geophysical surveys. true Geosoft format gridded data, ER Mapper format gridded data, ESRI ArcGIS shapefile, and keyhole markup language (.kml) data archive files unknown Alaska Division of Geological & Geophysical Surveys Metadata Manager (907)451-5020 (907)451-5050 3354 College Road Fairbanks AK 99709-3707 USA dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays distributor Contact DGGS for current pricing Free download http://doi.org/10.14509/29555 Geosoft format gridded data, ER Mapper format gridded data, ESRI ArcGIS shapefile, and keyhole markup language (.kml) data archive files CSDGM IMPORT ERROR: No digtinfo/formcont information dataset Horizontal Positional Accuracy Report All originating data were positioned by DGPS (Differential Global Positioning System) with an accuracy of 5 meters or better. Helicopter and fixed wing geophysical surveys often have small data gaps that do not negatively impact the overall quality of the final products. Reference the metadata for each originating survey for specific details. Helicopter and fixed wing geophysical surveys often have small data gaps that do not negatively impact the overall quality of the final products. Reference the metadata for each originating survey for specific details. These data originate from multiple similar geophysical surveys with different specifications. Reference the metadata of each originating survey for exact specifications. This lineage was generated by the FGDC CSDGM to 19139 transformation Gridded data - The gridded data from the East Styx, Farewell, Middle Styx, and Styx River geophysical surveys were merged. The diurnally corrected magnetic data for the Styx River area were adjusted for regional variations i.e. IGRF gradient, 2005, updated to the date of data acquisition and adjusted for altimeter variations. The East Styx, Farewell, and Middle Styx areas were adjusted using the 2010 IGRF model updated to the date of data acquisition and adjusted for altimeter variations. The residual grids of all the areas may, therefore, have different base values dependent on the IGRF model used because of the time elapsed between the flying of the first and last surveys. The grids were adjusted to each other prior to the final merge. The apparent resistivity grids for 56,000 Hz, 7200 Hz, and 900 Hz coplanar EM data were merged with no reprocessing, as general processing methods and more importantly background resistivity values for all frequencies have not changed since the Styx River (2007/2008) flying. The gridded data from the East Styx survey were merged with data from previous surveys flown in the Farewell and Middle Styx areas (2012 and 2013) and in the Styx River area (2007 and 2008) using Oasis Montaj techniques. Oasis Montaj has the capability to merge or stitch two or three grids together. The process requires overlap between adjacent grid areas. There is also the option of selecting different grid stitch techniques. For this project, the standard "Suture" technique with the "No De-trending" option was selected. The process requires selecting a "master" grid or the grid that all other grids will be leveled to. The grid that was published first is usually chosen and the grid from the most recent survey was selected as the secondary grid (i.e. the grid that will be DC shifted to the master grid). 2013-01-01T00:00:00 Boundary - DGGS staff constructed a boundary of the merged grid file. The grid boundary was constructed using Geosoft Oaisis montaj grid outline and map export functions. The boundary file is available in Geosft PLY ASCII format and ESRI Shapefile format. 2019-01-01T00:00:00 Google Earth KMZ files - DGGS staff created Google Earth KMZ/KML files from the grid files data using ESRI ArcGIS software. 2019-01-01T00:00:00 Source Contribution: Data collection, processing, and deliverySource Type: paper 63360 East Styx survey area: Airborne magnetic, electromagnetic and radiometric data in line (point), grid, vector, and map formats, Talkeetna, Tyonek, McGrath, and Lime Hills quadrangles, south-central Alaska 2014-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Burns, L.E. originator CGG originator Fugro GeoServices, Inc. originator http://doi.org/10.14509/29142 Geophysical Report GPR 2014-5 scale 1:63,360, 1 DVD 2014-01-01 Source Contribution: Data collection, processing, and deliverySource Type: paper 63360 Farewell survey area: Airborne magnetic, electromagnetic and radiometric data in line (point), grid, vector, and map formats, McGrath and Lime Hills quadrangles, south-central Alaska 2014-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Burns, L.E. originator CGG originator Fugro GeoServices, Inc. originator http://doi.org/10.14509/27291 Geophysical Report GPR 2014-2 scale 1:63,360, 1 DVD 2014-01-01 Source Contribution: Data collection, processing, and deliverySource Type: paper Farewell electromagnetic, magnetic, and radiometric airborne geophysical survey data compilation 2019-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Burns, L.E. originator Graham, G.R.C. originator Emond, A.M. originator Barefoot, J.D. originator http://doi.org/10.14509/30190 Geophysical Report GPR 2019-12 4 p 2019-01-01 Source Contribution: Data collection, processing, and deliverySource Type: paper 63360 Middle Styx survey area: Airborne magnetic, electromagnetic, and radiometric data in line (point), grid, vector, and map formats, Lime Hills and Tyonek quadrangles, southcentral Alaska 2013-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Burns, L.E. originator Fugro Airborne Surveys Corp. originator Fugro GeoServices, Inc. originator http://doi.org/10.14509/25419 Geophysical Report GPR 2013-2 scale 1:63,360, 1 DVD 2013-01-01 Source Contribution: Data collection, processing, and deliverySource Type: paper Middle Styx electromagnetic, magnetic, and radiometric airborne geophysical survey data compilation 2019-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Burns, L.E. originator Graham, G.R.C. originator Emond, A.M. originator Barefoot, J.D. originator CGG originator Fugro GeoServices, Inc. originator http://doi.org/10.14509/30188 Geophysical Report GPR 2019-10 21 p 2019-01-01 Source Contribution: Data collection, processing, and deliverySource Type: paper Farewell and Middle Styx survey areas: Project report, interpretation maps, EM anomalies, stacked multi-channel profiles, and other products of the airborne geophysical surveys, parts of the McGrath, Lime Hills, and Tyonek quadrangles, south-central Alaska 2015-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher CGG originator Fugro GeoServices, Inc. originator http://doi.org/10.14509/29349 Geophysical Report GPR 2014-4 22 sheets 2015-01-01 Source Contribution: Data collection, processing, and deliverySource Type: paper Styx River electromagnetic and magnetic airborne geophysical survey data compilation 2019-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Burns, L.E. originator Emond, A.M. originator Fugro Airborne Surveys Corp. originator Stevens Exploration Management Corp. originator http://doi.org/10.14509/30166 Geophysical Report GPR 2019-2 3 p 2019-01-01 Source Contribution: Data collection, processing, and deliverySource Type: paper 63360 Preliminary final version of part of the airborne geophysical data from the Styx River Survey, southcentral Alaska: parts of Lime Hills and Tyonek quadrangles 2008-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Burns, L.E. originator Fugro Airborne Surveys Corp. originator Stevens Exploration Management Corp. originator Anglo American Exploration (USA), Inc. originator http://doi.org/10.14509/15981 Geophysical Report GPR 2008-2 5 sheets, scale 1:63,360 2008-01-01 Source Contribution: Data collection, processing, and deliverySource Type: paper Line, grid, and vector data, and plot files for the airborne geophysical survey of the Styx River Survey, southcentral Alaska 2008-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Burns, L.E. originator Fugro Airborne Surveys Corp. originator Stevens Exploration Management Corp. originator http://doi.org/10.14509/16561 Geophysical Report GPR 2008-3 27 sheets, 1 DVD 2008-01-01 otherRestrictions 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. unknown This metadata was automatically generated from the FGDC Content Standard for Digital Geospatial Metadata standard (version FGDC-STD-001-1998) using the 2019-08-12T11:11:00 version of the FGDC CSDGM to ISO 19139 transform. Simone Montayne Alaska Division of Geological & Geophysical Surveys Metadata Manager (907)451-5020 (907)451-5050 3354 College Road Fairbanks AK 99709-3707 USA dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays pointOfContact