c3e51305-6f78-47fc-8bbc-7c87fd897e40_source eng; USA utf8 dataset State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Metadata Manager 907-451-5039 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. Please contact us through the e-mail address above whenever possible. pointOfContact 2008-05-06 ISO 19115 Geographic Information - Metadata ISO 19115:2003/Cor.1:2006(E) Geologic map of the Eagle A-1 Quadrangle, Fortymile mining district 2002-01-01 publication 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. originator http://dx.doi.org/10.14509/2863 MAP, VECTOR DIGITAL DATA Preliminary Interpretive Report PIR 2002-1A 1 sheet, scale 1:63,360, 6 disks This geologic map was produced by merging a bedrock geologic map and a surficial geologic map of the Eagle A-1 Quadrangle. Surficial geologic units were determined by a combination of air photo interpretation and site-specific field investigations. Bedrock geologic units were determined by using a combination of airborne magnetic and electromagnetic surveys, several months of fieldwork, geochemical data, and laboratory investigations. These maps are the result of new field investigations by DGGS in 1999 and 2001. The resulting map and data are intended to provide a geologic map and a geologic interpretation of the Fortymile mining district at 1:63,360 scale. Previously 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 critical geologic features that may relate to more regional structures or geologic units. These detailed observations are also critical to test or use in tectonic models. This map also provides a geologic base in which to interpret geochemical results from the concurrent DGGS rock sampling program. The geologic work 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. Jessica Mayer provided assistance with surficial geologic studies. completed State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys GIS Data Manager/Cartographer (907) 451-5029 (907) 451-5020 (907) 451-5050 3354 College Road Fairbanks AK 99709-3707 USA dggspubs@alaska.gov You may view our web site at http://www.dggs.alaska.gov for the latest information on available data. Please e-mail your questions and data requests when possible since our web site and e-mail address will remain current even if our phone number and mailing address change. pointOfContact notPlanned Alluvial Deposits Colluvial Deposits Geology Glacial Deposits Igneous Rocks Man-Made Deposits Metamorphic Rocks Mining STATEMAP Project Unconsolidated Deposits theme none Alaska, State of Eagle Quadrangle Fortymile Mining District Fortymile River Jack Wade Junction Steele Creek Dome Taylor Highway Top of the World Highway place none Fortymile River Assemblage Nasina Series Seventymile Terrane stratum none Cenozoic Cretaceous Devonian Holocene Jurassic Mesozoic Mississippian Paleozoic Pennsylvanian Permian Pleistocene Precambrian Quaternary Tertiary Triassic temporal none The State of Alaska makes no express or implied warranties (including warranties of merchantability and fitness) with respect to the character, function, or capabilities of the electronic services or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products, any failure thereof, or otherwise, and in no event will the State of Alaska's liability to the requester or anyone else exceed the fee paid for the electronic service or product. otherRestrictions Use Constraints: Any hardcopies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, they are obligated to describe the types of modifications the user has made. 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. otherRestrictions Access Constraints: This report, map, and dataset are available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. (See contact information below) Bedrock geologic map of the Eagle A-1 Quadrangle, Fortymile mining district 2002-01-01 publication Division of Geological & Geophysical Surveys Fairbanks AK publisher Szumigala, D.J. originator Newberry, R.J. originator Werdon, M.B. originator Athey, J.E. originator Flynn, R.L. originator Clautice, K.H. originator http://dx.doi.org/10.14509/2864 MAP, VECTOR DIGITAL DATA Preliminary Interpretive Report PIR 2002-1B 1 sheet, 1:63,360 scale crossReference Geologic map of the Eagle A-2 Quadrangle, Fortymile mining district, Alaska 2001-01-01 publication Division of Geological & Geophysical Surveys Fairbanks AK, USA publisher Werdon, M.B. originator Newberry, R.J. originator Szumigala, D.J. originator Pinney, D.S. originator http://dx.doi.org/10.14509/2669 MAP, VECTOR DIGITAL DATA Preliminary Interpretive Report PIR 2001-3A 1 sheet, scale 1:63,360 crossReference eng; USA geoscientificInformation Native Dataset Environment: Microsoft Windows XP SP2, ArcGIS 9.+, and any text editor. Technical Prerequisites: Please check the MapInfo web site (http://www.mapinfo.com/) for the latest documentation on importing ESRI shape files. -141.504512 -141.000000 63.999139 64.250853 1999-01-01 2002-01-01 The layers listed below are present as ArcGIS shape files. Attribute information for the following layers (entities) is included in this metadata file under the "Entity_and_Attribute_Information" section. Each layer is listed and described in detail under its own heading starting "Entity_Type_Label." Basic unit information is also included in the unit code set file "PIR2002-1_codeset.pdf." Layers include: >eaga1ages_2 age date locations >eaga1bedcont2 bedrock unit contact boundaries >eaga1compdike dike strike orientations >eaga1compfld2 axial traces >eaga1compflt2 fault traces >eaga1compgeo3 uncoded contacts surrounding the surficial and bedrock units >eaga1compshr uncoded contacts surrounding the exposed sheared bedrock units >eaga1dikes dike composition and location >eaga1faultsym fault orientation >eaga1foldsym fold orientation >eaga1indmin kyanite, staurolite, and tourmaline localities identified by thin section petrography >eaga1pingo pingo locations >eaga1srfcont contacts surrounding the surficial units >eaga1str foliation and bedding structural information true PDF 1.6 ArcGIS Shapefile ESRI ArcGIS 9.x State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Natural Resource Technician 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 Please view our Web site (http://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible. distributor Printed publication can be purchased for $13.00 (contact information below) plus shipping if mailed. Digital files on CD-ROM are available for $10.00 (contact information below). No fees charged for downloaded files. Ordering Instructions: Order by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). The DGGS web site (http://www.dggs.alaska.gov/) has a list of electronic data available and an order form that can be printed. Payment accepted: Cash, check, money order, VISA, or MasterCard. Digital downloads: less than 30 minutes for most files. Offline CD/DVD-ROMs: 1-2 weeks unless special arrangements are made and an express fee is paid. http://dx.doi.org/10.14509/2863 PDF CSDGM IMPORT ERROR: No digtinfo/formcont information http://dx.doi.org/10.14509/2863 ArcGIS Shapefile CSDGM IMPORT ERROR: No digtinfo/formcont information dataset Horizontal Positional Accuracy Report Location data were downloaded from Garmin 12XL GPS units into an Access database. Sample numbers and locations with selected data were queried from the database or brought into an Excel spreadsheet and then spatially analyzed in MapInfo Professional 6.5. The lists of samples were visually checked against the lists of analyzed samples returned from the laboratories. It was verified that all the samples plotted on the maps are included in the various tables and spreadsheets. Horizontal Positional Accuracy A value of estimated position error in meters was calculated by the Garmin 12XL units and recorded for each sample location. Estimated position error calculated by the Garmin 12XL units was not better than 3 meters and averaged approximately 6 meters. The GPS system suffers from calculation and geometric error. This error results from items such as error in satellite positions, mathematical error introduced by the formulas used by the GPS unit for calculating position, and errors caused by narrow satellite alignments. Estimated position error is a value determined by the GPS manufacturer for the calculation and geometric error as a whole. 'Selective availability', a deliberate degradation of GPS data managed by the U.S. government, was not operating after May 1, 2000, when the majority of samples were collected. 'Selective availability' induces an additional error of approximately 100 meters to a GPS location. Surficial-geologic map data have a horizontal positional accuracy dependent on: (1) the 1:50,000-scale (nominal) aerial photographs on which it is based, with an estimated potential error due to a pen line width of approximately 0.001 being equivalent to approximately 1.5 meters on the ground; (2) the accuracy of the human zoom transfer scope operator in tracing the linework from acetate overlays to topographic base maps, with an estimated error due to a pen line width of approximately 0.001 being equivalent to approximately 1.5 meters on the ground; (3) the accuracy of the zoom transfer process itself, error magnitude highly variable and unknown but potentially large; (4) the digitizing RMS error of 0.003 inches (input coverage units), which equates to approximately 5 meters on the ground for a 1:63,360-scale map; and (5) the accuracy of the human operator digitizing the geologic linework from the topographic base maps, with an estimated error due to a pen line width of approximately 0.001 being equivalent to approximately 1.5 meters on the ground. Total potential horizontal error for surficial-geologic map features is therefore estimated to be approximately 10 meters. meters 10 This dataset includes geospatial information about geologic units, age and field sample locations, structural features, structural measurements, pingo, and dike locations. This dataset includes geospatial information about geologic units, age and field sample locations, structural features, structural measurements, pingo, and dike locations. Polygon topology present and clean on appropriate data. Other data are line, point, or annotation data and do not require topologic relationships. This lineage was generated by the FGDC CSDGM to 19139 transformation Fieldwork - 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 mapping involved using Burns and others (1999) on a daily basis for checking geologic contacts and units. 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. Field station notes and downloaded GPS location data were entered into a Microsoft Access 2000 database. 2001-01-01T00:00:00 Fieldwork - Fieldwork for surficial investigations, including traverses, roadcut investigations, and river exposures, was conducted for 60 person-days during the months of June through August in 1999 - 2001. Field notes and sediment samples were collected throughout the quadrangle for surficial investigations. Surficial mapping involved using Yeend (1996) on a regular basis for checking placer geology and general units. Surficial mappers recorded observations on co-registered acetate overlays on 1:50,000-scale (nominal) color-infrared aerial photographs, and directly on 1:63,360-scale topographic base maps. Stations were located using air photos and handheld GPS devices with location precision varying from �3 to 15 meters. 2001-01-01T00:00:00 Laboratory data compilation - Laboratory analyses were performed on rock samples collected during the fieldwork process step 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. Thin section and some other analytical data were entered into Microsoft Access 2000 databases. Thin sections produced by this study are currently stored at the DGGS office in Fairbanks, Alaska. Rock samples, including geochemical sample pulps and rock hand samples from most field stations, are currently stored at the DGGS office in Fairbanks. Final storage for most rock samples generated by this study will be at the DGGS Geologic Materials Center (GMC) in Eagle River, Alaska. 2002-01-01T00:00:00 Laboratory data compilation - Laboratory analyses were performed on radiocarbon samples and gold-bearing gravel samples from June 1999 intermittently through April 2002. Unanalyzed radiocarbon and tephra samples are currently stored at the DGGS office in Fairbanks. Final storage for most samples generated by this study will be at the DGGS Geologic Material Center (GMC) in Eagle River, Alaska. 2002-01-01T00:00:00 Geologic map compilation - The bedrock and surficial geologic maps were compiled using field notes from fieldwork process step (above), analytical results from laboratory data compilation process step (above), and all known geologic data from previous work in the quadrangle. The main sources of existing data include Foster (1969), Newberry and others (1988), Yeend (1996), Burns and others (1999), Szumigala and others (2000, 2002), Werdon and others (2000), Flynn and Newberry (2001), Layer and others (in prep.), and Day and others (in press). 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 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. Surficial-geologic information was interpreted using 1:50,000-scale (nominal) air-photo stereopairs, and compiled onto acetate overlays. The overlay information was transferred to a paper 1:63,360-scale USGS topographic base using a zoom transfer scope. 2002-01-01T00:00:00 Digital cartography - The bedrock-geologic map compilation mylar (above) 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 'on-screen' digitized as complete polygons in MapInfo Professional 6.5. The polygon coverage was translated into Arc/Info format. In Arc/Info 7.0.4, all bedrock unit contacts and polygon coverages were generated from the original file and visual properties were coded. Arc coverages such as fold axes and cross-section traces were also 'on-screen' digitized in MapInfo Professional and translated into Arc/Info file format for visual coding. Station-specific information such as structural measurements, indicator mineral locations, location of age samples, and location of dikes too small to be mappable at 1:63,360 scale were imported into MapInfo Professional 6.5 from a Microsoft Access 2000 database or Excel spreadsheet using GPS locations. MapInfo Professional point coverages were translated into Arc/Info file format and visual properties were coded. Surficial-geologic information was digitized from the paper USGS topographic base map (above) into Arc/Info 7.0.4 GIS (ArcEdit module) using a large-format digitizing table. Surficial-geologic polygons and lines were then edited and attributed using Arc, Info, and ArcEdit. Bedrock point data of locations of structural observations (strike, dip, cleavage, jointing, etc.) and "rubblecrop" were intersected with the surficial-geologic polygon coverage using the Arc command "intersect" in order to identify locations that were mapped as surficial materials based on aerial photography but were found to have small exposures that were desirable to be mapped as bedrock. These areas were then modified in the surficial-geologic coverages to be areas of bedrock exposure. Final bedrock and surficial geology polygon coverages were merged using the Arc command "union" to generate the polygon coverage used to make PIR 2002-1A, the comprehensive geologic map. 2002-01-01T00:00:00 Metadata creation - Metadata were collected by David Szumigala, Jennifer Athey, and De Anne Stevens to FGDC Standards using a text editor and ESRI ArcCatalog 8.1.0.642 2002-01-01T00:00:00 Source Contribution: These data were used to further define the geologic units in the Eagle A-1 Quadrangle. See this publication cited in the Process Step section below.Source Type: paper 63360 Reconnaissance geology of the Eagle A-1 and A-2 quadrangles, Alaska 1969-01-01 publication United States Government Printing Office Washington D.C. USA publisher Foster, H.L. originator http://www.dggs.alaska.gov/pubs/id/3658 MAP, DOCUMENT U.S. Geological Survey Bulletin B 1271-G p. G1-G30, 1 sheet, scale 1:63,360 1969-01-01 Source Contribution: These data were used to further define the geologic units in the Eagle A-1 Quadrangle and contribute to the general geologic understanding of the area. See this publication cited in the Process Step section below.Source Type: paper 25000 Geology of the Boundary area, Eagle A-1 Quadrangle, east-central Alaska 2001-01-01 publication Flynn, R.L. Fairbanks AK, USA publisher Flynn, R.L. originator Newberry, R.J. originator TABULAR DIGITAL DATA, VECTOR DIGITAL DATA, MAP U.S. Geological Survey EDMAP program U.S. Geological Survey EDMAP program, under assistance Award No. 00HQAG0061 1 sheet, 1:25,000 scale. Part of Geology M.S. thesis work at University of Alaska, Fairbanks. 2000-01-01 2001-01-01 Source Contribution: These data were used to further define the geologic units in the Eagle A-1 Quadrangle and contribute to the general geologic understanding of the area. See this publication cited in the Process Step section below.Source Type: paper Geochemistry and age constraints on metamorphism and deformation of the Fortymile River area, eastern Yukon-Tanana Upland, Alaska 2002-01-01 publication U.S. Geological Survey Washington D.C. USA publisher Day, W.C. originator Aleinikoff, J.N. originator Gamble, B.M. originator Wilson, F.H. (ed.) originator Galloway, J. (ed.) originator http://www.dggs.alaska.gov/pubs/id/4050 documentDigital U.S. Geological Survey Professional Paper P 1662 p. 4-18 2002-01-01 Source Contribution: Geologic maps published by DGGS using data from this CD-ROM were referred to frequently during geologic mapping. A list of the geologic maps available is included in a cross-reference publication. See this publication cited in the Process Step section below.Source Type: CD-ROM CD-ROM containing profile and gridded data and section lines of 1998 geophysical survey data for part of the Fortymile mining district, Alaska, southern Eagle and northern Tanacross quadrangles 1999-01-01 publication State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Fairbanks Alaska, USA publisher Burns, L.E. originator Dighem originator Stevens Exploration Management Corp. originator http://dx.doi.org/10.14509/1886 TABULAR DIGITAL DATA, RASTER DIGITAL DATA, VECTOR DIGITAL DATA Public Data File PDF 99-9 2 CD-ROMs 1998-08-01 1999-02-01 Source Contribution: See this publication cited in the Process Step section belowSource Type: paper 63360 Gold placers of the historical Fortymile River region, Alaska 1996-01-01 publication U.S. Geological Survey Washington D.C. USA publisher Yeend, W.E. originator http://www.dggs.alaska.gov/pubs/id/3781 MAP, DOCUMENT U.S. Geological Survey Bulletin B 2125 75 pp., 1 sheet, scale 1:63,360 1996-01-01 Source Contribution: These data were used to further define the geologic units in the Eagle A-1 Quadrangle and contribute to the general geologic understanding of the area. See this publication cited in the Process Step section below.Source Type: paper 63360 Major oxide, minor oxide, trace element, rare-earth element, and geochemical data from rocks collected in Eagle and Tanacross quadrangles, Alaska in 2000 2000-01-01 publication State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Fairbanks AK publisher Werdon, M.B. originator Szumigala, D.J. originator Newberry, R.J. originator Grady, J.C. originator Munly, W.C. originator http://dx.doi.org/10.14509/2729 MAP, DOCUMENT Raw Data File RDF 2000-4 29 p., 3 sheets, scale 1:63,360 2000-01-01 Source Contribution: These data were used to further define the geologic units in the Eagle A-1 Quadrangle and contribute to the general geologic understanding of the area. See this publication cited in the Process Step section below.Source Type: paper 63360 Major oxide, minor oxide, trace element, and geochemical data from rocks collected in a portion of the Fortymile mining district, Alaska, 1999 2000-01-01 publication State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Fairbanks AK publisher Szumigala, D.J. originator Newberry, R.J. originator Werdon, M.B. originator Finseth, B.A. originator Pinney, D.S. originator Flynn, R.L. originator http://dx.doi.org/10.14509/2727 MAP, DOCUMENT Raw Data File RDF 2000-1 24 p., 2 sheets, scale 1:63,360 2000-01-01 Source Contribution: These data were used to further define the geologic units in the Eagle A-1 Quadrangle and contribute to the general geologic understanding of the area. See this publication cited in the Process Step section below.Source Type: paper 63360 Major oxide, minor oxide, trace element, rare-earth element, trace geochemical, and coal quality data from rocks collected in Eagle and Tanacross quadrangles, Alaska in 1999, 2000, and 2001 2002-01-01 publication State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Fairbanks AK publisher 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. originator http://dx.doi.org/10.14509/2866 MAP, DOCUMENT Raw Data File RDF 2002-1 35 p., 1 sheet, scale 1:63,360 2002-01-01 Source Contribution: These data were used to further define the geologic units in the Eagle A-1 Quadrangle and contribute to the general geologic understanding of the area. See this publication cited in the Process Step section below.Source Type: paper New 40Ar/39Ar dates for intrusions and mineral prospects in the eastern Yukon-Tanana Terrane, Alaska - regional patterns and significance 1998-01-01 publication U.S. Geological Survey Washington D.C. USA publisher Newberry, R.J. originator Layer, P.W. originator Solie, D.N. originator Burleigh, R.E. originator Gray, J.E. (ed.) originator Riehle, J.R. (ed.) originator http://www.dggs.alaska.gov/pubs/id/4120 REPORT U.S. Geological Survey Professional Paper P 1595 p. 131-159 1998-01-01 Source Contribution: This topography was used in the publication as a base for the sample location points. This topography appears as a transparent overlay on the printed geologic maps.Source Type: online Digital Raster Graphic (DRG), Eagle A-1 1997-08-08 publication USGS Reston VA, USA publisher USGS originator http://agdc.usgs.gov/data/usgs/geodata/drg/temp/drglist_E.html mapDigital None None 1997-08-08 otherRestrictions Metadata Access Constraints: none 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 State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. unknown 2009-01-05 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. Last Metadata Review Date: 2008-05-06 State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Metadata Manager 907-451-5039 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. Please contact us through the e-mail address above whenever possible. pointOfContact