Identification_Information: Citation: Citation_Information: Originator: Solie, D.N. Originator: O'Sullivan, P.B. Originator: Werdon, M.B. Originator: Freeman, L.K. Originator: Newberry, R.J. Originator: Szumigala, D.J. Originator: Hubbard, T.D. Publication_Date: 2014 Title: Zircon U-Pb age data, Alaska Highway Corridor, Tanacross and Nabesna quadrangles, Alaska Geospatial_Data_Presentation_Form: digital-data, report Series_Information: Series_Name: Raw Data File Issue_Identification: RDF 2014-16 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 8 p. Online_Linkage: http://dx.doi.org/10.14509/27322 Description: Abstract: Twenty-two igneous and metamorphic rock samples were collected in a 20-km-long swath centered on the Alaska Highway between Tetlin Junction, Alaska, and the Canada border. Igneous and metamorphic rock samples were submitted to the Apatite to Zircon, Inc. laboratory (A2Z), where zircon U-Pb age analysis, using laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS), was performed by Paul O'Sullivan. The 15 felsic plutonic rock samples and one gabbro sample yield Cretaceous zircon U-Pb weighted-mean ages ranging from 95.7 Ma to 106.2 Ma. Zircons from a metadiorite yield a Triassic weighted-mean age of about 241.9 Ma. Metamorphic zircons from two samples with felsic igneous protoliths yield Mississippian weighted-mean ages of 351.7 Ma and 354.6 Ma. Detrital zircons from two metaconglomerates yield individual grain ages from 100 Ma to 1,811 Ma, but are predominantly between 300 Ma and 345 Ma. Detrital zircons from a quartzite yield peaks at about 2,648 Ma, 1,946 Ma, and 1,807 Ma. Samples were analyzed for a variety of suites of major and trace elements depending on the sample type. The analytical data tables associated with this report are being released in digital format. Purpose: The Alaska Division of Geological & Geophysical Surveys (DGGS) conducted a multi-year project (from 2006 through 2010) studying the geology and geologic hazards along the Alaska Highway corridor. As part of the bedrock geologic mapping, samples were collected for geochronologic analyses using 40Ar/39Ar, fission-track, and U-Pb dating techniques. Summaries of analytical results appear on bedrock-geologic maps that are being published in three segments. This report supplies the supporting data for the zircon U-Pb age results from the easternmost segment of the project, in the Tanacross and Nabesna quadrangles. Supplemental_Information: The DGGS metadata standard extends the FGDC standard to include elements that are required to facilitate our internal data management. These elements, referred to as "layers," group and describe files that have intrinsic logical or topological relationships and correspond to subdirectories within the data distribution package. The metadata layer provides an FGDC metadata file and may include other documentation files. Attribute information for each data layer is described in this metadata file under the "Entity_and_Attribute_Information" section. Data layer contents: >border: A polygon that encompasses the maximum geographic extent of the data observations >geochron-summary: Table containing sample descriptions, location coordinates, and summary ages of rock samples analyzed for zircon uranium/lead geochronology using laser ablation-inductively coupled plasma-mass spectrometry (LA-“ICP-“MS) >geochron-data: Data tables (.xlsx) that provide the detailed zircon U-Pb geochronology results. Note that this group of files also includes a documentation spreadsheet that explains how the data columns are named and organized. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 2009 Ending_Date: 2014 Currentness_Reference: ground condition Status: Progress: complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -142.426900 East_Bounding_Coordinate: -141.017100 North_Bounding_Coordinate: 63.325100 South_Bounding_Coordinate: 62.555500 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 and Sampling Theme_Keyword: Bedrock Theme_Keyword: Bedrock Geology Theme_Keyword: Detrital Zircon Theme_Keyword: Geochronology Theme_Keyword: Geology Theme_Keyword: Igneous Rocks Theme_Keyword: Isotopes Theme_Keyword: Metamorphic Rocks Theme_Keyword: U-Pb Place: Place_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Place_Keyword: Alaska Highway Corridor Place_Keyword: Nabesna Quadrangle Place_Keyword: Tanacross Quadrangle 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: Carboniferous Temporal_Keyword: Devonian Temporal_Keyword: Mississippian 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: GIS 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_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 Alaska State Capital Improvement Project funds. Samples used in this report were collected by Larry Freeman, Melanie Werdon, David Szumigala, and Trent Hubbard of DGGS; and Rainer Newberry of the University of Alaska Fairbanks Department of Geology and Geophysics. Margaret Donelick and Jim McMillan (A2Z) provided technical assistance with sample preparation; Charles Knaack (Washington State University) provided technical assistance with LA-ICP-MS data collection; Paul O'Sullivan and Ray Donelick (A2Z) provided valuable assistance with LA-ICP-MS data interpretation. Cross_Reference: Citation_Information: Originator: Solie, D.N. Originator: Layer, P.W. Originator: Werdon, M.B. Originator: Newberry, R.J. Originator: Freeman, L.K. Originator: Lessard, R.R. Publication_Date: 2013 Title: 40Ar/39Ar data, Alaska Highway corridor from Delta Junction to Canada border, parts of Mount Hayes, Tanacross, and Nabesna quadrangles, Alaska Series_Information: Series_Name: Raw Data File Issue_Identification: RDF 2013-8 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 35 p Online_Linkage: http://dx.doi.org/10.14509/26841 Cross_Reference: Citation_Information: Originator: Solie, D.N. Originator: O'Sullivan, P.B. Originator: Werdon, M.B. Originator: Lessard, R.R. Publication_Date: 2013 Title: Apatite fission track data, Alaska Highway corridor, Mount Hayes Quadrangle, Alaska Series_Information: Series_Name: Raw Data File Issue_Identification: RDF 2013-9 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/10.14509/26861 Cross_Reference: Citation_Information: Originator: Solie, D.N. Originator: Werdon, M.B. Originator: Newberry, R.J. Originator: Freeman, L.K. Originator: Lessard, R.R. Publication_Date: 2008 Title: Major-oxide, minor-oxide, trace-element and geochemical data from rocks collected in the Alaska Highway corridor Mount Hayes Quadrangle, Alaska in 2006 and 2007 Series_Information: Series_Name: Raw Data File Issue_Identification: RDF 2008-2 v. 1.0.1 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 23 p Online_Linkage: http://dx.doi.org/10.14509/16021 Cross_Reference: Citation_Information: Originator: Werdon, M.B. Originator: Freeman, L.K. Originator: Szumigala, D.J. Originator: Newberry, R.J. Originator: Andrew, J.E. Originator: Speeter, G.G. Originator: Solie, D.N. Originator: Hubbard, T.D. Originator: Griesel, G.A. Originator: Elliott, B.A. Publication_Date: 2014 Title: Major-oxide, minor-oxide, and trace-element geochemical data from rocks collected in the Alaska Highway corridor, Mount Hayes, Tanacross, and Nabesna quadrangles, Alaska, in 2006, 2008, 2009, and 2010 Series_Information: Series_Name: Raw Data File Issue_Identification: RDF 2014-4 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 3 p Online_Linkage: http://dx.doi.org/10.14509/27201 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 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: The original data files provided to us by A2Z included macros and proprietary calculations. The tabulated results presented in this data release are in the publication format specified by the lab. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Locations were recorded using hand-held GPS units with an estimated horizontal accuracy of approximately 10 m. Lineage: Process_Step: Process_Description: Sample collection - DGGS field geologists collected rock samples from the surface or within 0.5 m of the surface. Care was taken to collect fresh, unweathered samples representative of rock types in the map area. Locations were recorded using hand-held GPS units with an estimated horizontal accuracy of approximately 10 m. Process_Date: 2009 Process_Step: Process_Description: U-Pb-geochron-data - DGGS submitted selected rock samples to Apatite to Zircon, Inc. in 2011. Paul O'Sullivan directed the processing and analyses of the samples in the A2Z laboratory. Laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) analyses were performed at the Geoanalytical Laboratory, Washington State University, Pullman, Washington, U.S.A. Detailed discussion of laboratory techniques is provided in appendices to the accompanying report Process_Date: 2011 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: point Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.0001 Longitude_Resolution: 0.0001 Geographic_Coordinate_Units: decimal degrees Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 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: rdf2014-16-border.shp Entity_Type_Definition: A polygon that encompasses the maximum geographic extent of the data observations Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Entity_Attribute_Layer_Name: border Detailed_Description: Entity_Type: Entity_Type_Label: rdf2014-16-geochron-summary.csv Entity_Type_Definition: Table containing sample descriptions, location coordinates, and summary ages of rock samples analyzed for zircon uranium/lead geochronology using laser ablation-inductively coupled plasma-“mass spectrometry (LA-ICP-“MS) Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Entity_Attribute_Layer_Name: geochron-summary 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: YYAAA9999X: YY=last two digits of year, AAA=geologist's initials (one to three characters), 9999=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. The initials used by the geologists who collected samples for this project are: LF = Larry K. Freeman, MBW = Melanie B. Werdon, RN = Rainer J. Newberry, TDH = Trent D. Hubbard, Z = David J. Szumigala 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: The lab sample number is typically identical to the field sample number. However, in some cases, the sample number provided to the lab does differ from the number assigned in the field. We provide both numbers to document instances in which the sample numbers in the lab files differ from the field sample number. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: NULL Enumerated_Domain_Value_Definition: Blank (NULL) values indicate that the lab sample number is identical to the field sample number. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: LATITUDE Attribute_Definition: Latitude, NAD27 Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 62.5555 Range_Domain_Maximum: 63.3251 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: LONGITUDE Attribute_Definition: Longitude, NAD27 Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -142.4269 Range_Domain_Maximum: -141.0171 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: ZIRCON_TYPE Attribute_Definition: The type of zircon that was dated. Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: zircon Enumerated_Domain_Value_Definition: zircon crystal Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: detrital zircon Enumerated_Domain_Value_Definition: zircon grain Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute: Attribute_Label: ROCK_CLASSIFICATION Attribute_Definition: The type of rock that was dated. Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Unrepresentable_Domain: The rock we sampled were collected from: igneous, metaigneous, and metasedimentary units. Attribute: Attribute_Label: DESCRIPTION Attribute_Definition: Description of the sample Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Unrepresentable_Domain: Characters 1 to 254 of a brief sample or station description. Attribute: Attribute_Label: DESCRIP_2 Attribute_Definition: Extension of the sample or station description for descriptions which are greater than 254 characters in length Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Unrepresentable_Domain: Characters greater than 254 of the sample or station description. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: NULL Enumerated_Domain_Value_Definition: Blank (NULL) values indicate that the descriptive text is shorter than 254 characters. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys 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: Enumerated_Domain: Enumerated_Domain_Value: NULL Enumerated_Domain_Value_Definition: Blank (NULL) values indicate that the sample was a detrital zircon; NUM_MEASUREMENTS_USED is not applicable. Enumerated_Domain_Value_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 7 Range_Domain_Maximum: 49 Attribute: Attribute_Label: TOTAL_MEASUREMENTS Attribute_Definition: Total number of measurements Attribute_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: NULL Enumerated_Domain_Value_Definition: Blank (NULL) values indicate that the sample was a detrital zircon; TOTAL_MEASUREMENTS is not applicable. Enumerated_Domain_Value_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 38 Range_Domain_Maximum: 50 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: Enumerated_Domain: Enumerated_Domain_Value: NULL Enumerated_Domain_Value_Definition: Blank (NULL) values indicate that the sample was a detrital zircon; WMEAN_AGE_MA is not applicable. Enumerated_Domain_Value_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 95.74 Range_Domain_Maximum: 354.57 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: Enumerated_Domain: Enumerated_Domain_Value: NULL Enumerated_Domain_Value_Definition: Blank (NULL) values indicate that the sample was a detrital zircon; MEAN_AGE_MA is not applicable. Enumerated_Domain_Value_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 95.82 Range_Domain_Maximum: 355.4 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: Enumerated_Domain: Enumerated_Domain_Value: NULL Enumerated_Domain_Value_Definition: Blank (NULL) values indicate that the sample was a detrital zircon; S2_FFER is not applicable. Enumerated_Domain_Value_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2.53 Range_Domain_Maximum: 13.46 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: Enumerated_Domain: Enumerated_Domain_Value: NULL Enumerated_Domain_Value_Definition: Blank (NULL) values indicate that the sample was a detrital zircon; S2_STDEV_FFER is not applicable. Enumerated_Domain_Value_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2.92 Range_Domain_Maximum: 90.81 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: Enumerated_Domain: Enumerated_Domain_Value: NULL Enumerated_Domain_Value_Definition: Blank (NULL) values indicate that the sample was a detrital zircon; S2 is not applicable. Enumerated_Domain_Value_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.37 Range_Domain_Maximum: 13.46 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: Enumerated_Domain: Enumerated_Domain_Value: NULL Enumerated_Domain_Value_Definition: Blank (NULL) values indicate that the sample was a detrital zircon; S2_STDEV is not applicable. Enumerated_Domain_Value_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.42 Range_Domain_Maximum: 20.31 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: Enumerated_Domain: Enumerated_Domain_Value: NULL Enumerated_Domain_Value_Definition: Blank (NULL) values indicate that the sample was a detrital zircon; MSWDW is not applicable. Enumerated_Domain_Value_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.04 Range_Domain_Maximum: 4.27 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: Enumerated_Domain: Enumerated_Domain_Value: NULL Enumerated_Domain_Value_Definition: Blank (NULL) values indicate that the sample was a detrital zircon; P_MSWDW is not applicable. Enumerated_Domain_Value_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 1 Attribute: Attribute_Label: MIN_CONCORDANT_SCANS_IN_CALCULATION Attribute_Definition: Value represents the minimum number of concordant scans required for a successful analysis. Attribute_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: NULL Enumerated_Domain_Value_Definition: Blank (NULL) values indicate that the sample was a detrital zircon; MIN_CONCORDANT_SCANS_IN_CALCULATION is not applicable. Note: A2Z did not provide a MIN_CONCORDANT_SCANS_IN_CALCULATION value for sample: 09LF206A Enumerated_Domain_Value_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 5 Range_Domain_Maximum: 5 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: Enumerated_Domain: Enumerated_Domain_Value: NULL Enumerated_Domain_Value_Definition: Blank (NULL) values indicate that the sample was a detrital zircon; MEAN_U_PPM is not applicable. Enumerated_Domain_Value_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 5.49 Range_Domain_Maximum: 2588.14 Attribute_Units_of_Measure: ppm 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: Enumerated_Domain: Enumerated_Domain_Value: NULL Enumerated_Domain_Value_Definition: Blank (NULL) values indicate that the sample was a detrital zircon; MEAN_TH_PPM is not applicable. Enumerated_Domain_Value_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2.51 Range_Domain_Maximum: 804.53 Attribute_Units_of_Measure: ppm 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: Enumerated_Domain: Enumerated_Domain_Value: NULL Enumerated_Domain_Value_Definition: Blank (NULL) values indicate that the sample was a detrital zircon; MEAN_U_TH_RATIO_PPM is not applicable. Enumerated_Domain_Value_Definition_Source: Apatite to Zircon, Inc. (A2Z) Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.372 Range_Domain_Maximum: 4.83 Attribute_Units_of_Measure: ppm Detailed_Description: Entity_Type: Entity_Type_Label: rdf2014-16-geochron-data Entity_Type_Definition: Data tables (.xlsx) that provide the detailed zircon U-Pb geochronology results. Note that this group of files also includes a documentation spreadsheet that explains how the data columns are named and organized. Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys Entity_Attribute_Layer_Name: geochron-data 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 2014-16 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/10.14509/27322 Fees: Free download Metadata_Reference_Information: Metadata_Date: 20140721 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