Identification_Information: Citation: Citation_Information: Originator: Buchanan, J.W. Originator: Gavel, M.M. Originator: Barrera, M.L. Originator: Regan, S.P. Originator: Newberry, R.J. Publication_Date: 2025 Title: LA-ICP-MS uranium lead geochronologic data of zircon from igneous and meta-igneous rocks in the Chena project area, Circle, Big Delta, and Eagle quadrangles, Alaska Geospatial_Data_Presentation_Form: spreadsheet Series_Information: Series_Name: Raw Data File Issue_Identification: RDF 2025-14 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 4 p. Online_Linkage: https://doi.org/10.14509/31553 Description: Abstract: LA-ICP-MS uranium lead geochronologic data of zircon from igneous and meta-igneous rocks in the Chena project area, Circle, Big Delta, and Eagle quadrangles, Alaska, Raw Data File 2025-14, provides uranium-lead (U-Pb) geochronologic data from single zircon spots, analyzed using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). Alaska Division of Geological & Geophysical Surveys (DGGS) staff collected zircon data from 22 igneous and meta-igneous rock samples, primarily collected during the 2023 field season, to support the Earth Mapping Resources Initiative (Earth MRI) Chena project. Two samples were analyzed to support geologic interpretation in the Mount Harper (2022) project area. Crystallization age data are organized in the age summary data table with our interpreted crystallization ages, sample location information, and sample descriptions. The zircon grain data table contains isotopic and elemental data for each zircon spot analyzed. Both tables have accompanying data dictionaries. These data and report are available from the DGGS website: http://doi.org/10.14509/31553. Purpose: This dataset aims to delineate the age of igneous activity to support geologic mapping efforts, tectonic interpretations, and characterization of mineralization in the Yukon-Tanana Uplands, Alaska. Supplemental_Information: >data: Analytical lab data and accompanying data dictionary >sample-summary: Summary data spreadsheet and accompanying data dictionary Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 2022 Ending_Date: 2025 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -146.754309 East_Bounding_Coordinate: -143.664506 North_Bounding_Coordinate: 65.086894 South_Bounding_Coordinate: 64.006522 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Theme_Keyword: Age Dates Theme_Keyword: Analyses Theme_Keyword: Analyses and Sampling Theme_Keyword: Analytical Lab Results Theme_Keyword: Analytical Results Theme_Keyword: Batholith Theme_Keyword: Bedrock Theme_Keyword: Bedrock Geology Theme_Keyword: DGGS Theme_Keyword: Gabbro Theme_Keyword: Geochronology Theme_Keyword: Geologic Theme_Keyword: Geology Theme_Keyword: Granite Theme_Keyword: Granodiorite Theme_Keyword: Greenstone Theme_Keyword: Mineral Composition Theme_Keyword: Mineral Exploration Theme_Keyword: Mineral Resources Theme_Keyword: Mineralogy Theme_Keyword: Minerals Theme_Keyword: Mining Theme_Keyword: Orthogneiss Theme_Keyword: Phyllite Theme_Keyword: Porphyry Theme_Keyword: Reservoir Theme_Keyword: Resource Assessment Theme_Keyword: Resource Information Theme_Keyword: Resources Theme_Keyword: Sample Location Theme_Keyword: Tonalite Theme_Keyword: U-Pb Theme_Keyword: Zircon Place: Place_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Place_Keyword: Anderson Creek Place_Keyword: Angel Creek Place_Keyword: Anvil Creek Place_Keyword: Blackshell Creek Place_Keyword: Caribou Creek Place_Keyword: Cash Creek Place_Keyword: Chena Hot Springs Place_Keyword: Chena River Place_Keyword: Clearwater Creek Place_Keyword: Dan Creek Place_Keyword: Deep Creek Place_Keyword: Dexter Creek Place_Keyword: Eisenmenger Fork Place_Keyword: Glacier Creek Place_Keyword: Globe Creek Place_Keyword: Gold Creek Place_Keyword: Goodpaster River Place_Keyword: Granite Creek Place_Keyword: Granite Tors Place_Keyword: Hunts Creek Place_Keyword: Marten Creek Place_Keyword: Mascot Creek Place_Keyword: Monument Creek Place_Keyword: Moose Creek Place_Keyword: Paldo Creek Place_Keyword: Pleasant Creek Place_Keyword: Porcupine Creek Place_Keyword: Rhoads Creek Place_Keyword: Ricks Creek Place_Keyword: Rock Creek Place_Keyword: Salcha River Place_Keyword: Sawmill Creek Place_Keyword: Shaw Creek Place_Keyword: Slate Creek Place_Keyword: Stiles Creek Place_Keyword: Stone Boy Creek Place_Keyword: Stuart Creek Place_Keyword: Tibbs Creek 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: Early Cretaceous Temporal_Keyword: Late Cretaceous Temporal_Keyword: Mississippian Temporal_Keyword: Paleocene 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 authors thank the University of Arizona LaserChron Center staff for their contributions to data collection, technical discussion, and other support. The analytical work was funded by the U.S. Geological Survey's Earth Mapping Resources Initiative (Earth MRI) under cooperative agreement G23AC00372 and by the State of Alaska. 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. Geological Survey. Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey. Cross_Reference: Citation_Information: Originator: Gavel, M.M. Originator: Twelker, Evan Originator: Wypych, Alicja Originator: Naibert, T.J. Originator: Newberry, R.J. Originator: Szumigala, D.J. Originator: Wildland, A.D. Originator: Barrera, M.L. Originator: Biegel, J.N. Originator: Harvey, D.A. Originator: Ketcham, R.A. Originator: Muller, I.P. Originator: Regan, S.P. Publication_Date: 2023 Title: Field station locations and magnetic susceptibility data for the Chena-Pogo and Mount Harper projects, Big Delta and Circle quadrangles, Alaska, collected June-September 2023 Series_Information: Series_Name: Raw Data File Issue_Identification: RDF 2023-27 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/10.14509/31096 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 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The accompanying report and data tables provide a comprehensive discussion of processing methods, with errors reported in the tables where applicable. This data is being released as part of the DGGS RDF series, which includes content describing approved techniques and methods for the collection, storage, visualization, analysis, and interpretation of scientific data. While the information has been reviewed by several geologists familiar with the study area, the data and report have not undergone formal review for technical content or conformity to DGGS editorial standards. For inquiries regarding analytical values or procedures, the originating lab is the best point of contact. Logical_Consistency_Report: Not applicable Completeness_Report: This data release is complete. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Sample location coordinates (in WGS84 datum) were collected using GPS-enabled field tablets with a typical reported accuracy of +/- 10 meters. Lineage: Process_Step: Process_Description: Sample collection - Alaska Division of Geological & Geophysical Surveys (DGGS) staff collected zircon data from 22 samples of igneous and meta-igneous rocks primarily collected during the 2023 field season in support of the Earth Mapping Resources Initiative (Earth MRI) Chena project. DGGS field geologists collected fresh, unweathered samples from surface outcrops and hand-dug pits that exposed fragmented bedrock, selecting them to represent the characteristic lithology or intrusive body. Process_Date: 2023 Process_Step: Process_Description: Analytical methods - This report includes single-grain zircon data generated by DGGS geologists at the Arizona LaserChron Center (ALC) at the University of Arizona, with direction from laboratory staff. The accompanying report provides additional detail about the methods used by the labratory. Process_Date: 2025 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: point Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.0000001 Longitude_Resolution: 0.0000001 Geographic_Coordinate_Units: decimal degrees Geodetic_Model: Horizontal_Datum_Name: WGS84 Ellipsoid_Name: WGS 84 Semi-major_Axis: 6378137 Denominator_of_Flattening_Ratio: 298.257223563 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: rdf2025-14_zircon_grain_data.csv, rdf2025-14_zircon_grain_data_data_dictionary.csv Entity_Type_Definition: Analytical lab data and accompanying data dictionary Entity_Type_Definition_Source: DGGS Entity_Attribute_Layer_Name: data Detailed_Description: Entity_Type: Entity_Type_Label: rdf2025-14_age_summary.csv, rdf2025-14_age_summary_data_dictionary.csv Entity_Type_Definition: Summary data spreadsheet and accompanying data dictionary Entity_Type_Definition_Source: DGGS Entity_Attribute_Layer_Name: sample-summary 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 2025-14 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: spreadsheet Format_Version_Date: 20250715 Format_Information_Content: table Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.14509/31553 Fees: Free download Metadata_Reference_Information: Metadata_Date: 20250715 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