Identification_Information: Citation: Citation_Information: Originator: Moshrefzadeh, Jamshid Originator: Acosta, M.D. Originator: Barrera, M.L. Originator: Buchanan, J.W. Originator: Naibert, T.J. Originator: Newberry, R.J. Originator: Norwood, L.P. Originator: Regan, S.P. Originator: Szumigala, D.J. Originator: Twelker, Evan Publication_Date: 2025 Title: Geochemical data from samples collected in 2024 for the Chena and Steese projects, Big Delta, Circle, Fairbanks, and Livengood quadrangles, Alaska Geospatial_Data_Presentation_Form: csv Series_Information: Series_Name: Raw Data File Issue_Identification: RDF 2025-17 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 3 p. Online_Linkage: https://doi.org/10.14509/31692 Description: Abstract: Geochemical data from samples collected in 2024 for the Chena and Steese projects, Big Delta, Circle, Fairbanks, and Livengood quadrangles, Alaska, Raw Data File 2025-17, presents major oxide and trace element geochemistry of igneous, metamorphic, and potentially mineralized rocks collected during the 2024 field season as part of the Steese and Chena projects. Geologists from DGGS conducted 1:100,000-scale bedrock geologic mapping across a 9,635 km2 (~3,720 mi2) area of the Yukon-Tanana Uplands in eastern Interior Alaska, encompassing portions of the Big Delta, Circle, Fairbanks, and Livengood quadrangles. A total of 2,024 samples were collected to support these projects, which are funded by the U.S. Geological Survey (USGS) Earth Mapping Resource Initiative (Earth MRI) program. The work contributes to the modernization of geologic mapping in the region and supports mineral resource exploration efforts in Interior Alaska. This data file is released as a Raw Data File with an open end-user license. The data are available from the DGGS website: http://doi.org/10.14509/31692. Purpose: These geochemical analyses aid updating and modernizing geologic mapping of the Yukon Tanana Uplands region and to promote mineral resource exploration in Interior Alaska Supplemental_Information: >geochemistry-download: Digital data available through the Alaska Geochemistry database online. Download files include data, analytical methods, and detection limits. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2024 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -148.392677 East_Bounding_Coordinate: -143.814911 North_Bounding_Coordinate: 65.491436 South_Bounding_Coordinate: 64.678826 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Theme_Keyword: Analyses Theme_Keyword: Analyses and Sampling Theme_Keyword: Analytical Lab Results Theme_Keyword: Analytical Results Theme_Keyword: Base Metals Theme_Keyword: Chemistry Theme_Keyword: Critical Minerals Theme_Keyword: DGGS Theme_Keyword: Economic Geology Theme_Keyword: Exploration Theme_Keyword: Geochemical Data Theme_Keyword: Geochemical Surveys Theme_Keyword: Geochemistry Theme_Keyword: Geologic Theme_Keyword: Geology Theme_Keyword: Lab Methods Theme_Keyword: Major Oxides Theme_Keyword: Metals Theme_Keyword: Methods Theme_Keyword: Mineral Assessment Theme_Keyword: Mineral Deposit Theme_Keyword: Mineral Localities Theme_Keyword: Mineral Prospect Theme_Keyword: Mineral Resources Theme_Keyword: Minerals Theme_Keyword: Mining Theme_Keyword: Minor Oxides Theme_Keyword: Ore Deposit Theme_Keyword: Ores Theme_Keyword: Platinum Group Elements Theme_Keyword: Precious Metals Theme_Keyword: Rare Earth Elements Theme_Keyword: Resource Assessment Theme_Keyword: Resource Information Theme_Keyword: Resources Theme_Keyword: Sample Location Theme_Keyword: Trace Elements Theme_Keyword: Trace Geochemical Theme_Keyword: Trace Metals Place: Place_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Place_Keyword: Angel Creek Place_Keyword: Anvil Creek Place_Keyword: Approach Hill Place_Keyword: Beaver Creek Place_Keyword: Belle Creek Place_Keyword: Berry Creek Place_Keyword: Birch Hill Place_Keyword: Blackshell Creek Place_Keyword: Boulder Creek Place_Keyword: Captain Creek Place_Keyword: Caribou Creek Place_Keyword: Chatanika Place_Keyword: Chatanika River Place_Keyword: Chena Hot Springs Place_Keyword: Chena River Place_Keyword: Circle Mining District Place_Keyword: Cleary Creek Place_Keyword: Columbia Creek Place_Keyword: Cottonwood Creek Place_Keyword: Crooked Creek Place_Keyword: Dan Creek Place_Keyword: Deadwood Creek Place_Keyword: Deep Creek Place_Keyword: Dome Creek Place_Keyword: Fairbanks Mining District Place_Keyword: Frenchman Creek Place_Keyword: Frozenfoot Creek Place_Keyword: Gulch Creek Place_Keyword: Harrison Creek Place_Keyword: Hope Creek Place_Keyword: Lawson Creek Place_Keyword: Lost Creek Place_Keyword: Lulu Creek Place_Keyword: Mastodon Creek Place_Keyword: Mastodon Dome Place_Keyword: Melba Creek Place_Keyword: Monte Cristo Creek Place_Keyword: Monument Creek Place_Keyword: Moose Creek Place_Keyword: Munson Creek Place_Keyword: Olympia Creek Place_Keyword: Perhaps Creek Place_Keyword: Pilot Creek Place_Keyword: Portage Creek Place_Keyword: Rock Creek Place_Keyword: Ruby Creek Place_Keyword: Salcha River Place_Keyword: Serpentine Creek Place_Keyword: Sheep Creek Place_Keyword: Shovel Creek Place_Keyword: Silver Creek Place_Keyword: Smith Creek Place_Keyword: Snowshoe Creek Place_Keyword: Sourdough Creek Place_Keyword: Sterling Creek Place_Keyword: Stuart Creek Place_Keyword: Switch Creek Place_Keyword: Table Mountain Place_Keyword: Tolovana Mining District Place_Keyword: Twelvemile Creek Place_Keyword: Willow Creek Place_Keyword: Yukon-Tanana Upland 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: The DGGS Chena and Steese projects are funded by the State of Alaska and the USGS Earth Mapping Resources Initiative program under Cooperative Agreement numbers G24AC00323 and G23AC00372. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the opinions or policies of the U.S. Government. Mention of trade names or commercial products does not constitute their endorsement by the U.S. Government. Cross_Reference: Citation_Information: Originator: Moshrefzadeh, J.A. Originator: Buchanan, J.W. Originator: Naibert, T.J. Originator: Twelker, Evan Originator: Newberry, R.J. Originator: Szumigala, D.J. Originator: Barrera, M.L. Originator: Norwood, L.P. Originator: Acosta, M.D. Originator: Regan, S.P. Publication_Date: 2025 Title: Field station locations and magnetic susceptibility data collected in 2024 for the Chena and Steese projects, Yukon-Tanana Uplands, Alaska Series_Information: Series_Name: Raw Data File Issue_Identification: RDF 2025-5 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 5 p Online_Linkage: https://doi.org/10.14509/31476 Cross_Reference: Citation_Information: Originator: Moshrefzadeh, J.A. Originator: Newberry, R.J. Publication_Date: 2025 Title: Electron probe microanalyzer data collected on samples from the Chena and Steese projects, Yukon-Tanana Uplands, Alaska Series_Information: Series_Name: Raw Data File Issue_Identification: RDF 2025-13 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 6 p Online_Linkage: https://doi.org/10.14509/31537 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: In addition to BV Mineral Laboratories' accredited (ISO/IEC 17025) internal quality-control program, DGGS monitored analysis quality with one reference-material standard per batch of 20 analyses. Logical_Consistency_Report: Not applicable Completeness_Report: This data releaase is complete. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Location data were collected using GPS-enabled tablets and smartphones running the ESRI Field Maps App. The devices have a reported error of about 10 m. Lineage: Process_Step: Process_Description: Field data collection - During the 2024 field season, DGGS geologists conducted 1:100,000-scale bedrock geologic mapping of a 9,635 km2 (~3,720 mi2) area of the Yukon-Tanana Uplands of eastern Interior Alaska, including parts of the Big Delta, Circle, Fairbanks, and Livengood quadrangles. Geologists collected representative rock samples for whole-rock major-oxide and trace-element geochemistry to aid in the classification of rock units, correlation of units over the map area, and understanding of the tectonic setting. They obtained sample locations using GPS-enabled tablets and smartphones running the Esri Field Maps App, which has a reported error of approximately 10 m. Process_Date: 2024 Process_Step: Process_Description: Sample selection - The samples collected and analyzed for this report can be separated into two groups: those collected for whole-rock major-oxide, minor-oxide, and trace-element analyses (MOX), and those collected for trace-element geochemistry (GX) based on the presence of visible mineralization or alteration. MOX samples are igneous, metaigneous, or metasedimentary rocks that show little alteration or weathering. Analyzing MOX samples helps to determine rock types and petrogenesis, protoliths of metamorphic rocks, and tectonic settings. Conversely, GX samples are specifically collected based on the presence of mineralization and/or alterations, as these will help determine and characterize the potential mineral resources of the mapping areas. Field descriptions of the samples accompany the analytical data; however, these descriptions have not been reviewed for consistency with the geochemical results. Process_Date: 2024 Process_Step: Process_Description: Sample preparation - DGGS staff removed weathering and other heterogeneities from rock samples before sending them for MOX analysis. DGGS did not cut GX samples after collection. Australian Laboratory Services (ALS) Geochemistry processed and analyzed all samples. Samples were crushed to greater than 70 percent passing 2 mm, with a 250 g split pulverized to greater than 85 percent passing 75 microns. All samples were processed and analyzed by Bureau Veritas Commodities Canada Ltd. Mineral Laboratories (BV). All samples were crushed to greater than 70 percent passing through a 2-mm screen, and a 250-g split was pulverized to greater than 85 percent passing through a 75-micron screen (BV package PRP70-250). Process_Date: 2024 Process_Step: Process_Description: Geochemistry - Whole-rock major- and minor-oxide geochemistry were analyzed by lithium borate fusion digestion and inductively coupled plasma atomic emission spectroscopy (ICP-AES) (ME-ICP06 routine of ALS Geochemistry). Trace and rare-earth elements were analyzed using lithium metaborate fusion digestion and inductively coupled plasma mass spectrometry (ICP-MS) (ME-MS81, ME-MS61L, and MS61L-REE routines of ALS Geochemistry). Ag, Cd, Co, Cu, Li, Mo, Ni, Pb, Sc, and Zn were determined by four-acid digestion and ICP-AES (ME-4ACD81 routine of ALS Geochemistry); and As, Bi, Hg, In, Re, Sb, Se, Te, and Tl were determined by aqua regia digestion followed by ICP-MS (ME-MS42 routine of ALS Geochemistry). Total C and S were analyzed by Leco furnace (C-IR07 and S-IR08, routines of ALS Geochemistry, respectively). Pt, Pd, and Au were determined by fire assay with ICP-MS finish (Au-ICP21 and PGM-MS23, precious metals routines of ALS Geochemistry). B was analyzed using a sodium peroxide fusion and ICP-MS finish (B-MS82L routine of ALS; Wypych and others, 2022, 2023). Process_Date: 2024 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: point Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000001 Longitude_Resolution: 0.000001 Geographic_Coordinate_Units: decimal degrees Geodetic_Model: Horizontal_Datum_Name: NAD83 Ellipsoid_Name: GRS 80 Semi-major_Axis: 6378137 Denominator_of_Flattening_Ratio: 298.257222101 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: geochemistry-download Entity_Type_Definition: Digital data available through the Alaska Geochemistry database online. Download files include data, analytical methods, and detection limits. Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys (DGGS) Entity_Attribute_Layer_Name: geochemistry-download 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: RDF 2025-17 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: csv Format_Version_Date: 20250903 Format_Information_Content: table Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.14509/31692 Fees: Free download Metadata_Reference_Information: Metadata_Date: 20250903 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