Identification_Information: Citation: Citation_Information: Originator: Twelker, Evan Originator: O'Sullivan, P.B. Publication_Date: 2016 Title: U-Pb zircon age data from meta-igneous rocks in the Clearwater Mountains, Mount Hayes A-6 Quadrangle, Alaska Geospatial_Data_Presentation_Form: report and digital data Series_Information: Series_Name: Raw Data File Issue_Identification: RDF 2016-8 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 17 p. Online_Linkage: http://dx.doi.org/10.14509/29663 Description: Abstract: We report U-Pb zircon geochronology results for one metavolcanic and one metaplutonic rock sample from the Mount Hayes A-6 Quadrangle of central Alaska. These samples are representative of rock units assigned to the Clearwater terrane of Jones and others (1987), a sequence of greenschist-grade metavolcanic and metasedimentary rocks of poorly constrained age and tectonic origin. Our results indicate a crystallization age of 277.33 +/- 11.84 Ma for a felsic metavolcanic rock, and a 268.05 +/- 11.64 Ma crystallization age for a granitic metaplutonic unit intruding the former. Purpose: The metamorphic rocks of the Clearwater terrane form an alleged tectonostratigraphic terrane approximately 2 by 10 km in extent in the northwestern corner of the Mount Hayes A-6 Quadrangle. Based on limited fossil evidence, the terrane has been variously interpreted as a structurally-bound fragment of a Late Triassic volcanic arc or potentially a window into middle to late Paleozoic metamorphic basement underlying Wrangellia. We applied U-Pb zircon geochronology to two samples of meta-igneous rocks to resolve the uncertainty surrounding the precise age and regional correlations of this terrane. Supplemental_Information: >border: Outline of the study area. >geochron-data: Geochronology lab files and applicable documentation. >geochron-summary: Identification numbers, coordinates, sample descriptions, and summary ages of each sample. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 2013 Ending_Date: 2016 Currentness_Reference: ground condition Status: Progress: complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -146.935839 East_Bounding_Coordinate: -146.854469 North_Bounding_Coordinate: 63.220292 South_Bounding_Coordinate: 63.192897 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: Bedrock Theme_Keyword: Bedrock Geology Theme_Keyword: Geochronology Theme_Keyword: Geology Theme_Keyword: Lab Methods Theme_Keyword: Metamorphic Rocks Theme_Keyword: Metavolcanic rocks Theme_Keyword: Orthogneiss Theme_Keyword: Sample Location Theme_Keyword: U-Pb Theme_Keyword: Zircon Place: Place_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Place_Keyword: Mount Hayes Quadrangle Stratum: Stratum_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Stratum_Keyword: Clearwater 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: Permian 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: GIS Manager Contact_Address: Address_Type: mailing and physical Address: 3354 College Rd City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: 907-451-5020 Contact_Electronic_Mail_Address: dggsgis@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Data_Set_Credit: This project was supported by State of Alaska Capital Improvement Project funds through the Strategic and Critical Minerals Assessment program (part of the Airborne Geological/Geophysical Mineral Inventory [AGGMI]). Ray and Margaret Donelick (A2Z) provided technical assistance with sample preparation and LA-ICP-MS data collection. Cross_Reference: Citation_Information: Originator: Burns, L.E. Originator: CGG Originator: Fugro GeoServices, Inc. Publication_Date: 2014 Title: Wrangellia survey area: Airborne magnetic and electromagnetic data in line (point), grid, vector, and map formats, Talkeetna Mountains, Healy, and Mt. Hayes quadrangles, south-central Alaska Series_Information: Series_Name: Geophysical Report Issue_Identification: GPR 2014-1 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 56 sheets, 1 DVD, scale 1:63,360 Online_Linkage: http://dx.doi.org/10.14509/27022 Cross_Reference: Citation_Information: Originator: Clautice, K.H. Originator: Smith, T.E. Originator: Pessel, G.H. Originator: Solie, D.N. Publication_Date: 1989 Title: Geology and mineral occurrences, upper Clearwater Creek area, Mt. Hayes A-6 Quadrangle, Alaska Series_Information: Series_Name: Public Data File Issue_Identification: PDF 89-18 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 14 p., 2 sheets, scale 1:24,000 Online_Linkage: http://dx.doi.org/10.14509/1421 Cross_Reference: Citation_Information: Originator: Werdon, M.B. Originator: Azain, J.S. Originator: Granitto, Matthew Publication_Date: 2014 Title: Reanalysis of historical U.S. Geological Survey sediment samples for geochemical data from the western part of the Wrangellia terrane, Anchorage, Gulkana, Healy, Mt. Hayes, Nabesna, and Talkeetna Mountains quadrangles, Alaska Series_Information: Series_Name: Raw Data File Issue_Identification: RDF 2014-5 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 6 p Online_Linkage: http://dx.doi.org/10.14509/27287 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: This data is being released in the DGGS Raw Data File series. The information has been examined by several geologists familiar with the study area, but the data and accompanying report have not been formally reviewed for technical content or for conformity to the editorial standards of DGGS. Questions regarding the accuracy of information in the the A2Z data files can be best answered by the originating lab. Logical_Consistency_Report: not applicable Completeness_Report: This data release is complete. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Locations were recorded using handheld, WAAS-enabled GPS devices. WAAS-enabled GPS devices have a reported error of about 1 m (NSTB/WAAS T&E Team, 2006). Depending on degradation of the WAAS and GPS signals, the horizontal position error of sample locations in this report is in the range of 1-10 m. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Jones, D.L. Originator: Silberling, N.J. Originator: Coney, P.J. Originator: Plafker, George Publication_Date: 1987 Title: Lithotectonic terrane map of Alaska (west of the 141st meridian) Series_Information: Series_Name: Miscellaneous Field Studies Map Issue_Identification: MF 1874-A Publication_Information: Publication_Place: United States Publisher: U.S. Geological Survey Other_Citation_Details: 1 sheet, scale 1:2,500,000 Online_Linkage: http://dggs.alaska.gov/pubs/id/13082 Source_Scale_Denominator: 2500000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1987 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Jones, D.L. and others, 1987 Source_Contribution: fieldwork Process_Step: Process_Description: Fieldwork - DGGS field geologists collected rock samples from the ground surface; care was taken to collect fresh, unweathered samples representative of rock types in the map area. Locations were recorded using handheld GPS units with an estimated horizontal accuracy of approximately 10 m. Source_Used_Citation_Abbreviation: Jones, D.L. and others, 1987 Process_Date: 2013 Process_Step: Process_Description: U-pb data analysis - LA-ICP-MS sample preparation and data collection was performed at the A2Z laboratory in Viola, Idaho. The accompanying report provides a description of laboratory procedures and applicable references. Process_Date: 2014 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: point Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.00001 Longitude_Resolution: 0.00001 Geographic_Coordinate_Units: decimal degrees Geodetic_Model: Horizontal_Datum_Name: World Geodetic System of 1984 Ellipsoid_Name: WGS 84 Semi-major_Axis: 6378137 Denominator_of_Flattening_Ratio: 298.257223563 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: border Entity_Type_Label: rdf2016-8-border.shp Entity_Type_Definition: Outline of the study area. Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys (DGGS) Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: geochron-data Entity_Type_Label: rdf2016-8-geochron-data Entity_Type_Definition: Geochronology lab files and applicable documentation. Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys (DGGS) Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: geochron-summary Entity_Type_Label: rdf2016-8-geochron-summary.csv Entity_Type_Definition: Identification numbers, coordinates, sample descriptions, and summary ages of each sample. Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys (DGGS) Attribute: Attribute_Label: SAMPLE Attribute_Definition: Label assigned in the field to identify the sample. Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Unrepresentable_Domain: Generic example of a sample identifier: YYYYAAA9999X: YYYY= four digits of year, AAA=geologist's initials (one to three characters), 999=unique station number, X= optional alpha character which indicates that multiple samples were collected at a given location or that multiple observations were recorded in the project database. Attribute: Attribute_Label: LAB_SAMPLE_NUMBER Attribute_Definition: Label used by the lab to identify the sample. Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys and Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Unrepresentable_Domain: free text Attribute: Attribute_Label: LATITUDE Attribute_Definition: Latitude, WGS84 Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 63.196506 Range_Domain_Maximum: 63.216682 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: LONGITUDE Attribute_Definition: Longitude, WGS84 Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -146.927846 Range_Domain_Maximum: -146.862468 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: DESCRIPTION Attribute_Definition: Description of the sample Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Unrepresentable_Domain: A brief sample and/or station description. Attribute: Attribute_Label: NUM_MEASUREMENTS_USED Attribute_Definition: Number of measurements used for calculating the age. Attribute_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 13 Range_Domain_Maximum: 35 Attribute: Attribute_Label: TOTAL_MEASUREMENTS Attribute_Definition: Total number of measurements. Attribute_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 27 Range_Domain_Maximum: 45 Attribute: Attribute_Label: WMEAN_AGE_MA Attribute_Definition: Weighted mean age, in millions of years (Ma). Attribute_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 268.05 Range_Domain_Maximum: 277.33 Attribute_Units_of_Measure: Ma Attribute: Attribute_Label: MEAN_AGE_MA Attribute_Definition: Mean age, in millions of years (Ma). Attribute_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 266.04 Range_Domain_Maximum: 277.17 Attribute_Units_of_Measure: Ma Attribute: Attribute_Label: S2_FFER Attribute_Definition: 2-sigma error + fractionation-factor error Attribute_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 11.64 Range_Domain_Maximum: 11.84 Attribute: Attribute_Label: S2_STDEV_FFER Attribute_Definition: 2-sigma standard deviation on the 2-sigma error + fractionation-factor error Attribute_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 8.76 Range_Domain_Maximum: 13.48 Attribute: Attribute_Label: S2 Attribute_Definition: 2-sigma error (not including fractionation factor error) Attribute_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.3 Range_Domain_Maximum: 2.46 Attribute: Attribute_Label: S2_STDEV Attribute_Definition: 2-sigma standard deviation on the 2-sigma error (not including fractionation factor error) Attribute_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.48 Range_Domain_Maximum: 3.74 Attribute: Attribute_Label: MSWDW Attribute_Definition: Mean Square of Weighted Deviates. Lower value indicates decreasing scatter in the data. This is, roughly, a measure of the ratio of the observed scatter of the points (from the best-fit line) to the expected scatter (from the assigned errors and error correlations). The MSWD parameter cannot be compared to the classical R2 parameter, and is not a measure of how highly correlated the X- and Y-values are. If the assigned errors are the only cause of scatter, the MSWD will tend to be near unity. MSWD values much greater than unity generally indicate either underestimated analytical errors, or the presence of non-analytical scatter. MSWD values much less than unity generally indicate either overestimated analytical errors or unrecognized error-correlations. Attribute_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.56 Range_Domain_Maximum: 3.08 Attribute: Attribute_Label: P_MSWDW Attribute_Definition: Statistical scatter in the MSWD - values range between 1 (good) and 0 (poor) Attribute_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.001013 Range_Domain_Maximum: 0.149818 Attribute: Attribute_Label: MEAN_U_PPM Attribute_Definition: Mean concentration of uranium (U), in parts per million (ppm). Attribute_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 777.66 Range_Domain_Maximum: 2613.82 Attribute: Attribute_Label: MEAN_TH_PPM Attribute_Definition: Mean concentration of thorium (Th), in parts per million (ppm). Attribute_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 219.76 Range_Domain_Maximum: 1261.44 Attribute: Attribute_Label: MEAN_U_TH_RATIO_PPM Attribute_Definition: Mean concentration of uranium (U) divided by the mean concentration of thorium (Th); in parts per million (ppm). Attribute_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2.072 Range_Domain_Maximum: 3.539 Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys 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 (http://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 2016-8 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: ASCII tabular files Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://dx.doi.org/10.14509/29663 Fees: Free download Metadata_Reference_Information: Metadata_Date: 20160513 Metadata_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 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: http://www.dggs.alaska.gov/metadata/dggs.ext Profile_Name: dggs metadata extensions