Identification_Information: Citation: Citation_Information: Originator: Bundtzen, T.K. Originator: Pinney, D.S. Originator: Laird, G.M. Publication_Date: 1997 Title: Preliminary geologic map and data tables of the Ophir C-1 and western Medfra C-6 quadrangles, Alaska Geospatial_Data_Presentation_Form: geodatabase Series_Information: Series_Name: Public Data File Issue_Identification: PDF 97-46 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 11 p., 1 sheet, scale 1:63,360 Online_Linkage: https://doi.org/10.14509/1811 Description: Abstract: Preliminary geologic map and data tables of the Ophir C-1 and western Medfra C-6 quadrangles, Alaska, Public Data File 97-46, presents preliminary geologic findings from 1:63,360-scale mapping conducted by DGGS in May and June 1996 across the Ophir C-1 and western Medfra C-6 quadrangles in western Alaska. The study documents bedrock units from the Ruby and Innoko terranes, Cretaceous flysch, and the Cripple Creek Mountains volcano-plutonic complex, along with 17 unconsolidated surficial deposits. DGGS identified complex structural relationships, including multiple folding events and fault systems, and began radiometric dating to refine the geologic timeline. Economic geology highlights include placer gold production and mineralized zones in the Cripple Creek Mountains, where gold-antimony veins and breccia zones align with key fault intersections. The complete report, geodatabase, and ESRI fonts and style files are available from the Alaska Division of Geological & Geophysical Surveys website: http://doi.org/10.14509/1811. Purpose: DGGS conducted geologic mapping in the Ophir C-1 and western Medfra C-6 quadrangles of western Alaska to improve understanding of the region's mineral resource potential. By documenting bedrock units, structural features, and mineralized zones, they aimed to identify geologic controls on gold-bearing deposits and support future exploration in the Innoko Mining District. Supplemental_Information: This geodatabase is organized according to the AK GeMS mapping schema Hendricks, M.D., Macpherson, A.E., Athey, J.E., Wyatt, W.C., Montayne, Simone, Buchanan, Wes, Rivera, P.G., and Steinleitner, A.M., 2024, AK GeMS data dictionary: A description of the Alaska geologic mapping schema: Alaska Division of Geological & Geophysical Surveys Miscellaneous Publication 170 v. 2, 13 p. https://doi.org/10.14509/31172. The distribution package includes ESRI fonts and style files, along with usage instructions. Further documentation of the symbology is provided by Ekberg, P.G., Hendricks, M.D., and Athey, J.E., 2021, AK GeMS symbology: A description of the AK GeMS style file: Alaska Division of Geological & Geophysical Surveys Miscellaneous Publication 169, 7 p. https://doi.org/10.14509/30584 Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1996 Ending_Date: 2025 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -156.522257 East_Bounding_Coordinate: -155.765181 North_Bounding_Coordinate: 63.763486 South_Bounding_Coordinate: 63.474946 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Theme_Keyword: Actinolite Theme_Keyword: Alluvial Theme_Keyword: Alluvium Theme_Keyword: Argillite Theme_Keyword: Basalt Theme_Keyword: Basins Theme_Keyword: Bedrock Theme_Keyword: Bedrock Geology Theme_Keyword: Breccia Theme_Keyword: Bryozoans Theme_Keyword: Caldera Theme_Keyword: Chemistry Theme_Keyword: CIPW Norms Theme_Keyword: Colluvium Theme_Keyword: Conglomerate Theme_Keyword: Conodonts Theme_Keyword: Corundum Theme_Keyword: Diabase Theme_Keyword: Dike Theme_Keyword: Diorite Theme_Keyword: Economic Geology Theme_Keyword: Eolian Theme_Keyword: Exploration Theme_Keyword: Fan Theme_Keyword: Fluvial Theme_Keyword: Flysch Theme_Keyword: Foraminifera Theme_Keyword: Fossils Theme_Keyword: Gabbro Theme_Keyword: Gelifluction Theme_Keyword: GeMS DB L3 Compliant Theme_Keyword: GeMS DB v2 Theme_Keyword: Generalized Theme_Keyword: Geochemistry Theme_Keyword: Geologic Theme_Keyword: Geologic Map Theme_Keyword: Geology Theme_Keyword: Gneiss Theme_Keyword: Gold Theme_Keyword: Granite Theme_Keyword: Gravel Theme_Keyword: Graywacke Theme_Keyword: Greenschist Theme_Keyword: Hornfels Theme_Keyword: Igneous Theme_Keyword: Inoceramus Theme_Keyword: Intrusive Theme_Keyword: Lacustrine Theme_Keyword: Limestone Theme_Keyword: Lode Theme_Keyword: Loess Theme_Keyword: Major Oxides Theme_Keyword: Metamorphic Theme_Keyword: Minerals Theme_Keyword: Mining Theme_Keyword: Monzonite Theme_Keyword: Orthogneiss Theme_Keyword: Paleosols Theme_Keyword: Peat Theme_Keyword: Permafrost Theme_Keyword: Permafrost and Periglacial Theme_Keyword: Petrology Theme_Keyword: Phyllite Theme_Keyword: Pingos Theme_Keyword: Placer Theme_Keyword: Plutonic Theme_Keyword: Plutons Theme_Keyword: Polymetallic Theme_Keyword: Polymetallic Zone Theme_Keyword: Porphyry Theme_Keyword: Rhyodacite Theme_Keyword: Rip Rap Theme_Keyword: Rocks Theme_Keyword: Sand Theme_Keyword: Sandstone Theme_Keyword: Schist Theme_Keyword: Sediment Theme_Keyword: Sedimentary Theme_Keyword: Siltstone Theme_Keyword: Slate Theme_Keyword: Slope Theme_Keyword: Solifluction Theme_Keyword: Stockwork Theme_Keyword: Structure Theme_Keyword: Surficial Theme_Keyword: Tailings Theme_Keyword: Talus Theme_Keyword: Tectonics Theme_Keyword: Terrace Theme_Keyword: Terranes Theme_Keyword: Thermokarst Theme_Keyword: Till Theme_Keyword: Titanium Theme_Keyword: Tourmaline Theme_Keyword: Trace Fossils Theme_Keyword: Trace Metals Theme_Keyword: Tuff Theme_Keyword: Turbidites Theme_Keyword: Volcanic Theme_Keyword: Volcanology Place: Place_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Place_Keyword: Bear Creek Place_Keyword: Boston Creek Place_Keyword: Butte Creek Place_Keyword: Canyon Creek Place_Keyword: Caribou Creek Place_Keyword: Colorado Creek Place_Keyword: Colorado Creek Mine Place_Keyword: Creston Creek Place_Keyword: Cripple Creek Place_Keyword: Cripple Creek Mountains Place_Keyword: Cripple Landing Place_Keyword: Folger Creek Place_Keyword: Fourmile Creek Place_Keyword: Graham Creek Place_Keyword: Hunch Creek Place_Keyword: Idaho Creek Place_Keyword: Innoko Place_Keyword: Innoko Mining District Place_Keyword: Innoko River Place_Keyword: Kimbley Creek Place_Keyword: Montana Creek Place_Keyword: Quartz Creek Place_Keyword: Ruby Place_Keyword: Ruby Mining District Place_Keyword: Shorty Creek Place_Keyword: Susulatna River Place_Keyword: Tango Creek Place_Keyword: Twomile Creek Place_Keyword: Wyoming Creek Stratum: Stratum_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Stratum_Keyword: Kuskokwim Group Stratum_Keyword: Ruby Terrane Temporal: Temporal_Keyword_Thesaurus: Walker, J.D., Geissman, J.W., Bowring, S.A, and Babcock, L.E., comp., 2012, Geologic Time Scale v. 4.0: Geological Society of America Temporal_Keyword: Cretaceous Temporal_Keyword: Jurassic Temporal_Keyword: Mississippian Temporal_Keyword: Paleozoic Temporal_Keyword: Permian Temporal_Keyword: Precambrian Temporal_Keyword: Quaternary Temporal_Keyword: Tertiary Temporal_Keyword: Triassic Access_Constraints: This report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below). Use_Constraints: Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Position: Metadata Manager Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907)451-5020 Contact_Facsimile_Telephone: (907)451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Contact_Instructions: Please view our website (https://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible. Data_Set_Credit: Stephanie Foggia ably assisted all three geologists during the numerous field traverses completed in the study area. We especially thank the employees of Rosander Mining Company for providing warm hospitality and useful geologic discussions during our investigations. James Barker from Northwest Land Resources Inc. provided stimulating discussions about the region's polymetallic lode and placer gold deposits. Kinney Engineering, LLC staff used scanned and georeferenced paper maps to digitize geologic features into an AK GeMS database. Chris Wyatt conducted quality control of this digitizing work and completed the creation of the AK GeMS database. Ally M. Steinleitner implemented final database quality control and packaging. This geologic map (or report or conversion or product, etc.) was funded by the USGS National Cooperative Geologic Mapping Program under STATEMAP award number G23AC00584, 2023, and the State of Alaska General Fund. 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. Cross_Reference: Citation_Information: Originator: Reger, R.D. Originator: Campbell, K.M. Originator: Stevens, D.S.P. Originator: Smith, R.L. Publication_Date: 2003 Title: Survey of geology, geologic materials, and geologic hazards in proposed access corridors in the Ophir Quadrangle, Alaska Series_Information: Series_Name: Miscellaneous Publication Issue_Identification: MP 100 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 5 sheets, scale 1:250,000 Online_Linkage: https://doi.org/10.14509/3286 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Attribute fields within each feature class are populated using the map symbology and corresponding applicable values from the GeMS and AK GeMS specifications. When known, certainty in attribute interpretation is indicated in the relevant fields. Attribute accuracy varies throughout the map and is scale-dependent. Logical_Consistency_Report: All polygon features were topologically validated according to the AK GeMS geologic mapping schema specifications. Completeness_Report: This publication is a DGGS Public Data File (PDF). The objective of this series, published from 1983 through 1999, was to make project and field data available to the public as soon as possible. PDFs were not reviewed or edited. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Certainty in feature boundaries or location varies throughout the map. Data fields within each feature class and the accompanying orientation and location confidence lookup tables record the authors' degree of confidence in the location of applicable features. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Ekberg, P.G. Originator: Hendricks, M.D. Originator: Athey, J.E. Publication_Date: 2021 Title: AK GeMS symbology: A description of the AK GeMS style file Series_Information: Series_Name: Miscellaneous Publication Issue_Identification: MP 169 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 7 p Online_Linkage: https://doi.org/10.14509/30584 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2021 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Ekberg, P.G. and others, 2021 Source_Contribution: GIS analysis and digital cartography Source_Information: Source_Citation: Citation_Information: Originator: Hendricks, M.D. Originator: Ekberg, P.G. Originator: Athey, J.E. Originator: Wyatt, W.C. Originator: Willingham, A.L. Originator: Naibert, T.J. Publication_Date: 2021 Title: AK GeMS data dictionary: A description of the Alaska geologic mapping schema Series_Information: Series_Name: Miscellaneous Publication Issue_Identification: MP 170 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 10 p Online_Linkage: https://doi.org/10.14509/30669 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2021 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Hendricks, M.D. and others, 2021 Source_Contribution: GIS analysis and digital cartography Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey National Cooperative Geologic Mapping Program Publication_Date: 2020 Title: GeMS (Geologic Map Schema) - A standard format for the digital publication of geologic maps Series_Information: Series_Name: Techniques and Methods Issue_Identification: TM 11-B10 Publication_Information: Publication_Place: United States Publisher: U.S. Geological Survey Other_Citation_Details: 1 p Online_Linkage: https://dggs.alaska.gov/pubs/id/30585 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2020 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: U.S. Geological Survey National Cooperative Geologic Mapping Program, 2020 Source_Contribution: GIS analysis and digital cartography Process_Step: Process_Description: Geologic mapping - DGGS geologists conducted 1:63,360-scale geologic mapping in May and June of 1996 across the Ophir C-1 and western Medfra C-6 quadrangles in western Alaska. They described map units, identified fossils, and analyzed geochemical and mineralogical data from 25 mineralized zones and prospects. They examined bedrock packages, documented surficial deposits, and initiated radiometric dating. They also recorded structural features, including folds and faults, to support geologic interpretation. Process_Date: 1996 Process_Step: Process_Description: GIS analysis and digital cartography - This data distribution package's geologic and geographic features were organized and attributed according to the AK GeMS geologic mapping schema. The legacy data were programmatically transformed to provide download options in three formats: (1) an AK GeMS data package that includes the complete AK GeMS database and associated files, (2) a GeMS data package that is a conversion of the AK GeMS database into the base GeMS standard published by the USGS, and (3) a shapefile data package that includes two simple shapefile representations of the data. Source_Used_Citation_Abbreviation: Ekberg, P.G. and others, 2021 Source_Used_Citation_Abbreviation: Hendricks, M.D. and others, 2021 Source_Used_Citation_Abbreviation: U.S. Geological Survey National Cooperative Geologic Mapping Program, 2020 Process_Date: 2025 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: vector Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 4 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -159 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: 6378206.4 Denominator_of_Flattening_Ratio: 294.9786982 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: ophir_c1_medfra_c6_quads_prelim_geo_ak_gems_db_pkg Entity_Type_Definition: Geodatabase, layer files, style files, and fonts Entity_Type_Definition_Source: DGGS and USGS Entity_Attribute_Layer_Name: ophir_c1_medfra_c6_quads_prelim_geo_ak_gems_db_pkg Detailed_Description: Entity_Type: Entity_Type_Label: ophir_c1_medfra_c6_quads_prelim_geo_gems_db_pkg Entity_Type_Definition: Geodatabase, layer files, style files, and fonts Entity_Type_Definition_Source: DGGS and USGS Entity_Attribute_Layer_Name: ophir_c1_medfra_c6_quads_prelim_geo_gems_db_pkg Detailed_Description: Entity_Type: Entity_Type_Label: ophir_c1_medfra_c6_quads_prelim_geo_gems_geopackage Entity_Type_Definition: SQLite Database file Entity_Type_Definition_Source: DGGS and USGS Entity_Attribute_Layer_Name: ophir_c1_medfra_c6_quads_prelim_geo_gems_geopackage Detailed_Description: Entity_Type: Entity_Type_Label: ophir_c1_medfra_c6_quads_prelim_geo_gems_shapefile_pkg Entity_Type_Definition: Shapefiles and open data files Entity_Type_Definition_Source: DGGS and USGS Entity_Attribute_Layer_Name: ophir_c1_medfra_c6_quads_prelim_geo_gems_shapefile_pkg 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: PDF 97-46 Distribution_Liability: The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product. Standard_Order_Process: Non-digital_Form: DGGS publications are available as free online downloads or you may purchase paper hard-copies or digital files on CD/DVD or other digital storage media by mail, phone, fax, or email from the DGGS Fairbanks office. To purchase this or other printed reports and maps, contact DGGS by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: Cash, check, money order, VISA, or MasterCard. Turnaround time is 1-2 weeks unless special arrangements are made and an express fee is paid. Shipping charge will be the actual cost of postage and will be added to the total amount due. Contact us for the exact shipping amount. Fees: Contact DGGS for current pricing Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: geodatabase Format_Information_Content: geologic map Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.14509/1811 Fees: Free download Metadata_Reference_Information: Metadata_Date: 20251002 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