Kreiner, Douglas C. (ORCID: 0000-0002-4405-1403) Vazquez, Jorge A. (ORCID: 0000-0003-2754-0456) 20220517 tabular digital data Anchorage, Alaska U.S. Geological Survey, Alaska Science Center Suggested Citation: Kreiner, D.C., Vasquez, J.A., 2022, Zircon trace element data for igneous units related to mineralization in the eastern Yukon-Tanana upland and nearby areas, eastern Alaska: U.S. Geological Survey data release, https://doi.org/10.5066/P9Q6GYMH https://doi.org/10.5066/P9Q6GYMH From 2017-2019, framework metallogenic studies were completed in the eastern Yukon-Tanana upland in eastern Alaska. Numerous previously undated plutons known or suspected to contain components of porphyry, epithermal, and intrusion-related gold systems and associated deposit types were sampled for age and zircon trace element determinations between the Black Mountain area and the Yukon border, north of the Tanana River and south of the Yukon River. A collection of 54 samples were collected by Douglas Kreiner (USGS, Alaska Science Center). Zircon grains were separated from each sample. The samples were examined by U-Pb analysis by laser ablation-inductively coupled plasma mass spectrometry (LA-ICP-MS) in a USGS laboratory in Denver, CO. These geochronologic data are reported in a separate USGS data release https://doi.org/10.5066/P9RANVXY. The zircon samples were later analyzed for trace element characteristics by Douglas Kreiner using the Sensitive High Resolution Ion Microprobe with Reverse-Geometry (SHRIMP-RG) at the Stanford-USGS laboratory in Palo Alto, California. The samples represent several discrete periods of magmatic activity, ranging from 56.5-360.3 Ma. The Paleozoic ages are of host rocks that were previously unidentified and collected for regional framework geology. The bulk of analyzed samples are between 68-72 Ma. Other specific periods of mineralization range from 100-112 Ma and 180-211 Ma. The data were collected in support of deciphering the regional metallogenic framework of eastern interior Alaska. Specifically, the data were targeted towards presumed Mesozoic plutons with known or suspected magmatic-hydrothermal (e.g. porphyry, intrusion-related gold, or epithermal) styles of mineralization. This dataset was aimed at understanding the temporal and spatial evolution of mineralization across the region, and to better link mineralizing events to regional tectonic and magmatic evolution by exploring the evolution of magmatic conditions recorded in the zircon trace element signatures. 2022 publication date Complete None planned -144.2 -141.3 65.0 62.7 USGS Metadata Identifier USGS:ASC465 ISO 19115 Topic Category GeoScientificInformation NASA GCMD Earth Science Keyword Thesaurus Earth science Igneous rocks USGS Thesaurus Geology Geochronology Geochemistry Isotopic analysis None Sensitive High Resolution Ion Microprobe with Reverse-Geometry SHRIMP-RG Trace elements Pluton USGS Geographic Names Information System (GNIS) Alaska Eagle Tanacross Black Mountain No access constraints. No use constraints. These data are marked with a Creative Common CC0 1.0 Universal License and are in the public domain. It is requested that this USGS data release be cited for any subsequent publications that reference or utilize these data. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. U.S. Geological Survey, Alaska Science Center Mailing and Physical

4210 University Drive

Anchorage Alaska 99508 USA 907-786-7000 gs-ak_asc_datamanagers@usgs.gov Kreiner, D.C. Holm-Denoma, C. Pianowski, L. Flood, Z. Stephens, D. Graham, G.E. Vasquez, J. Creaser, R.A. 2023 journal article Economic Geology 118(4):745–778 online GeoScienceWorld Kreiner, D.C, Holm-Denoma, C., Pianowski, L., Flood, Z., Stephens, D., Graham, G.E., Vazquez, J., Creaser, R.A., 2023. Geochronology and mapping constraints on the time-space evolution of the igneous and hydrothermal systems in the Taurus Cu-Mo district, eastern Alaska. Economic Geology 118(4):745–778. https://doi.org/10.5382/econgeo.4999 https://doi.org/10.5382/econgeo.4999 As detailed in the supplemental information file, SHRIMP-RG zircon trace element Supplemental_Info.pdf, the Ca, Na, Al, P, and K concentrations were used to screen for analyses that encountered non-zircon inclusions capable of influencing the data. The log of the above concentration data for each sample population was plotted versus Hf concentrations because Hf behaves compatibly in zircon. Outliers were flagged and excluded from the maximum, minimum, and median calculations for each sample in the sample summary table "geochronology_sampleSummary_yukonTananaUpland_kreiner.csv". Additionally, the chondrite-normalized REE pattern was evaluated for all analyses to determine any outliers resulting from non-zircon inclusions. A zircon standard reference material (MAD-1) was also analyzed for comparison to known concentrations for all elements analyzed. All data are included in the data table, however column 'Excluded_median' in the data table indicates whether an analytical point was excluded from the calculation of the median value in the sample summary table. Spots with 'Excluded_median' identifiers in the data table are listed, but are also not included within the minimum or maximum analysis for any excluded spot value. Blank data values indicate a value was not calculated or determined. The geochronological data provided in this data release are reported in Holm-Denoma and others (2022) and contain trailing zeros. If the CSV files are opened directly in Microsoft Excel, data values may be truncated. Samples for this data set were collected from an area of the Yukon-Tanana Uplands area, with samples limited to the boundaries of the eastern sections of the Big Delta and Mount Hayes 1:250,000-scale quadrangles, the north and northeastern sections of the Gulkana and Nabesna 1:250,000-scale quadrangles, and the entirety of the Eagle and Tanacross 1:250,000-scale quadrangles, Alaska. This data set does not include any measurements collected for the element boron for one specified mount (labeled configuration CHD094) due to instrument failure during that mount session. Most coordinates were determined by handheld global positioning systems (GPS) in decimal degrees and are accurate to about 0.0001 degrees or about 20 feet. GPS data were collected in datum WGS84 (1984 World Geographic System datum), and for samples that were analyzed from previous sampling collections, conversion from datum NAD83 to datum WGS84 was provided using National Coordinate and Transformation Tool (NCAT) software (https://geodesy.noaa.gov/NCAT). Holm-Denoma, C. Pianowski, L. Kreiner, D.C. 2022 tabular digital data U.S. Geological Survey data release 10.5066/P9RANVXY online U.S. Geological Survey, ScienceBase Holm-Denoma, C., Pianowski, L., Kreiner, D.C., 2022, U-Pb zircon data for igneous units related to mineralization in the eastern Yukon-Tanana upland, eastern Alaska; U.S. Geological Survey data release, https://doi.org/10.5066/P9RANVXY https://doi.org/10.5066/P9RANVXY online database 2022 publication date Holm-Denoma and others, 2022 U-Pb zircon crystallization ages for the same sample set presented in this data release. Zircons were analyzed using LA-ICP-MS at the Denver Federal Center by Chris Holm-Denoma. Zircon grains were separated from crushed and ground bulk rock samples using standard magnetic and heavy liquid techniques. Zircon grains were hand-picked under a binocular microscope and mounted in 2.54cm epoxy discs. The epoxy mounts were ground to expose grain interiors, polished, and imaged using cathodo luminescence (CL) for zircon on a scanning electronmicroscope (SEM) to identify internal structure (rims, core, etc.). Strong and Driscoll, 2016 Unknown LA-ICP-MS analyses were performed at the Geology, Geochemistry and Geophysiscs Science Center in Lakewood, CO prior to the trace element work. Methodology, analytical parameters, and U/Pb geochronology data are reported in a separate USGS data release (Holm-Denoma et al. 2022). Unknown To ensure trace element (TE) analyses were targeting the correct zircon populations, careful spot selection was determined by matching the LA-ICP-MS laser pits to individual zircon grains in CL images. TE points were selected within the same internal zones (eg. core, rim, or growth zone) on the CL images of of each grain. Detailed description of the analytical process is provided in document "SHRIMP-RG Zircon trace element Supplemental Info.pdf" included with this data package. Unknown LITERATURE CITED: Ferry, J.M., Watson, E.B., 2007, New thermodynamic models and revised calibrations for the Ti-inzircon and Zr-in-rutile thermometers. Contributions to Mineralogy and Petrology 154(4):429–437. https://doi.org/10.1007/s00410-007-0201-0 Holm-Denoma, C., Pianowski, L., Kreiner, D.C., 2022, U-Pb zircon data for igneous units related to mineralization in the eastern Yukon-Tanana upland, eastern Alaska; U.S. Geological Survey data release, https://doi.org/10.5066/P9RANVXY Strong, T.R., Driscoll, R.L., 2016, A process for reducing rocks and concentrating heavy minerals: U.S. Geological Survey Open-File Report 2016–1022, 16 p., https://doi.org/10.3133/ofr20161022 Unknown Point 0.0001 0.0001 Decimal degrees World Geodetic System of 1984 (WGS84) World Geodetic System of 1984 (WGS84) 6378137 298.257223563 geochronology_dataDictionary_yukonTananaUpland_kreiner.csv Table with 151 entries which outline the table names, field names, an explanation of each field, and units of measure, as applicable. Presented in a Comma Separated Value (CSV) formatted table. Author defined TABLE Name of the data table in which the field is found. Author defined geochronology_SHRIMP-RG_yukonTananaUpland_kreiner.csv Filename of CSV data table Author defined geochronology_sampleSummary_yukonTananaUpland_kreiner.csv Filename of CSV data table Author defined FIELD_NAME Field name found in data table listed in field 'TABLE'. Author defined Attributes in this field are single words or concatenated abbreviations that describe the contents of the field. FIELD_EXPLANATION Brief description of the contents of 'FIELD_NAME'. Author defined Attributes in this field are brief descriptions of the contents of 'FIELD_NAME'. UNITS Specified units of measurement, as applicable to the parameter attributed. Author defined n/a not applicable Author defined decimal degrees angular units of measure Author defined degrees C degrees Celsius Author defined Ma Mega-annum, or millions of years before present. Author defined ppm parts per million Author defined geochronology_sampleSummary_yukonTananaUpland_kreiner.csv Table with descriptive sample information, including location, rock description, methods and age calculations, and summary of trace element concentration data. The table consists of 54 indexed entries. Presented in a Comma Separated Value (CSV) formatted table. Author defined Index Sorting value for this table. Author defined 1 54 Sample Sample number, as assigned when collected in the field; USGS identifier. Samples from drill core include an alphanumeric sequence that identify the year drilled, the initials of the prospect, and depth in meters. Author defined Unique alpha-numeric character string assigned to each sample. Latitude Latitude given in decimal degrees; datum WGS84. Author defined 62.7882 64.9636 Decimal degrees (WGS84) 0.0001 Longitude Longitude given in decimal degrees; datum WGS84. Author defined -144.1097 -141.2567 Decimal degrees (WGS84) 0.0001 Rock_Class Basic rock classification of the sample. Author defined Igneous Rock classification = Igneous Author defined Rock_Name Rock name based on petrographic observations. Author defined General rock description or nomenclature, as noted in collector's field or laboratory preparation notes. Mount Internal laboratory ID number for the sample mount. Author defined All values are concatenation of three letters followed by three digits. Date Month and year when analysis was conducted. Author defined 2019-04 2020-10 Date (YYYY-MM) Spots_total Total number of zircon measurements made per sample. Author defined 10 25 Age_Method Laboratory equipment and methodology used to determine age. Author defined LA-ICP-MS Laser ablation inductively coupled plasma mass spectrometry techniques for U-Pb Author defined Age_Ma Weighted mean of 207Pb-corrected 206Pb/238U age (Ma) determined for each sample from published sources detailed in supplemental information. Author defined 54.95 198.90 Ma (millions of years before present) Age_2sigma Uncertainty (2-sigma, or 95% confidence) of the weighted mean of 207Pb-corrected 206/238U age (Ma) from published sources detailed in supplemental information. Author defined 0.42 2.60 Ma (millions of years before present) TE_Method Method used for determining trace element values. Author defined SHRIMP-RG Sensitive high resolution ion microprobe - reverse geometry Author defined Grains_analyzed Number of grains contributing to the maximum, minimum, and median value calculations. Author defined 5 23 Li_max_ppm Maximum lithium (Li) value in the sample, in parts per million (ppm). Author defined 0.02 19.47 parts per million (ppm) Li_min_ppm Minimum lithium (Li) value in the sample, in parts per million (ppm). Author defined 0.01 4.90 parts per million (ppm) Li_median_ppm Median lithium (Li) concentration, in parts per million (ppm). Author defined 0.01 12.10 parts per million (ppm) B_max_ppm Maximum boron (B) value in the sample, in parts per million (ppm). All boron values from Mount CHD094 are represented by the entry 'n.c.' (not calculated). Either the beam was too weak, or the standard was too variable in boron; it resulted in bad standard analyses, and thus none of the boron measures are considered real data. Author defined 0.05 13.02 parts per million (ppm) B_min_ppm Minimum boron (B) value in the sample, in parts per million (ppm). All boron values from Mount CHD094 are represented by the entry 'n.c.' (not calculated). Either the beam was too weak, or the standard was too variable in boron; it resulted in bad standard analyses, and thus none of the boron measures are considered real data. Author defined 0.00 0.48 parts per million (ppm) B_median_ppm Median boron (B) concentration, in parts per million (ppm). All boron values from Mount CHD094 are represented by the entry 'n.c.' (not calculated). Either the beam was too weak, or the standard was too variable in boron; it resulted in bad standard analyses, and thus none of the boron measures are considered real data. Author defined 0.04 0.71 parts per million (ppm) F_max_ppm Maximum fluorine (F) value in the sample, in parts per million (ppm). Author defined 4.98 376.32 parts per million (ppm) F_min_ppm Minimum fluorine (F) value in the sample, in parts per million (ppm). Author defined 0.12 10.56 parts per million (ppm) F_median_ppm Median fluorine (F) concentration, in parts per million (ppm). Author defined 1.13 27.70 parts per million (ppm) Na_max_ppm Maximum sodium (Na) value in the sample, in parts per million (ppm). Author defined 2.07 102.15 parts per million (ppm) Na_min_ppm Minimum sodium (Na) value in the sample, in parts per million (ppm). Author defined 0.13 2.81 parts per million (ppm) Na_median_ppm Median sodium (Na) concentration, in parts per million (ppm). Author defined 0.79 10.17 parts per million (ppm) Al_max_ppm Maximum aluminum (Al) value in the sample, in parts per million (ppm). Author defined 4.97 644.16 parts per million (ppm) Al_min_ppm Minimum aluminum (Al) value in the sample, in parts per million (ppm). Author defined 1.07 7.28 parts per million (ppm) Al_median_ppm Median aluminum (Al) concentration, in parts per million (ppm). Author defined 1.68 23.89 parts per million (ppm) P_max_ppm Maximum phosphorous (P) value in the sample, in parts per million (ppm). Author defined 125.20 2232.60 parts per million (ppm) P_min_ppm Minimum phosphorous (P) value in the sample, in parts per million (ppm). Author defined 27.52 335.30 parts per million (ppm) P_median_ppm Median phosphorous (P) concentration, in parts per million (ppm) Author defined 84.84 619.47 parts per million (ppm) K_max_ppm Maximum potassium (K) value in the sample, in parts per million (ppm). Author defined 0.06 205.98 parts per million (ppm) K_min_ppm Minimum potassium (K) value in the sample, in parts per million (ppm). Author defined 0.01 0.38 parts per million (ppm) K_median_ppm Median potassium (K) concentration, in parts per million (ppm). Author defined 0.01 4.49 parts per million (ppm) Ca_max_ppm Maximum calcium (Ca) value in the sample, in parts per million (ppm). Author defined 3.09 2345.95 parts per million (ppm) Ca_min_ppm Minimum calcium (Ca) value in the sample, in parts per million (ppm). Author defined 0.26 7.69 parts per million (ppm) Ca_median_ppm Median calcium (Ca) concentration, in parts per million (ppm). Author defined 0.85 14.50 parts per million (ppm) Sc_max_ppm Maximum scandium (Sc) value in the sample, in parts per million (ppm). Author defined 25.85 450.12 parts per million (ppm) Sc_min_ppm Minimum scandium (Sc) value in the sample, in parts per million (ppm). Author defined 1.49 91.44 parts per million (ppm) Sc_median_ppm Median scandium (Sc) concentration, in parts per million (ppm). Author defined 9.52 153.70 parts per million (ppm) Ti_max_ppm Maximum isotope 49 titanium (Ti) value in the sample, in parts per million (ppm). Author defined 4.19 652.83 parts per million (ppm) Ti_min_ppm Minimum isotope 49 titanium (Ti) value in the sample, in parts per million (ppm). Author defined 0.88 8.15 parts per million (ppm) Ti_median_ppm Median isotope 49 titanium (Ti) concentration, in parts per million (ppm). Author defined 1.60 14.37 parts per million (ppm) Fe_max_ppm Maximum iron (Fe) value in the sample, in parts per million (ppm). Author defined 1.62 1832.28 parts per million (ppm) Fe_min_ppm Minimum iron (Fe) value in the sample, in parts per million (ppm). Author defined 0.28 60.84 parts per million (ppm) Fe_median_ppm Median iron (Fe) concentration, in parts per million (ppm). Author defined 0.79 74.33 parts per million (ppm) Y_max_ppm Maximum yttrium (Y) value in the sample, in parts per million (ppm) Author defined 860.11 7942.05 parts per million (ppm) Y_min_ppm Minimum yttrium (Y) value in the sample, in parts per million (ppm). Author defined 31.23 1032.86 parts per million (ppm) Y_median_ppm Median yttrium (Y) concentration, in parts per million (ppm). Author defined 168.39 2473.74 parts per million (ppm) Nb_max_ppm Maximum niobium (Nb) value in the sample, in parts per million (ppm). Author defined 5.81 90.45 parts per million (ppm) Nb_min_ppm Minimum niobium (Nb) value in the sample, in parts per million (ppm). Author defined 0.33 6.12 parts per million (ppm) Nb_median_ppm Median niobium (Nb) concentration, in parts per million (ppm). Author defined 2.27 35.24 parts per million (ppm) La_max_ppm Maximum lanthanum (La) value in the sample, in parts per million (ppm). Author defined 0.03 11.51 parts per million (ppm) La_min_ppm Minimum lanthanum (La) value in the sample, in parts per million (ppm). Author defined 0.01 0.06 parts per million (ppm) La_median_ppm Median lanthanum (La) concentration, in parts per million (ppm). Author defined 0.01 0.34 parts per million (ppm) Ce_max_ppm Maximum cerium (Ce) value in the sample, in parts per million (ppm). Author defined 4.78 144.00 parts per million (ppm) Ce_min_ppm Minimum cerium (Ce) value in the sample, in parts per million (ppm). Author defined 0.03 47.20 parts per million (ppm) Ce_median_ppm Median cerium (Ce) concentration, in parts per million (ppm). Author defined 0.25 74.72 parts per million (ppm) Pr_max_ppm Maximum praseodymium (Pr) value in the sample, in parts per million (ppm). Blank values indicate a value was not calculated or determined for that sample. Author defined 0.06 4.58 parts per million (ppm) Pr_min_ppm Minimum praseodymium (Pr) value in the sample, in parts per million (ppm). Blank values indicate a value was not calculated or determined for that sample. Author defined 0.02 0.23 parts per million (ppm) Pr_median_ppm Median praseodymium (Pr) concentration, in parts per million (ppm). Cell is blank if both Pr_max_ppm and Pr_min_ppm have value 0.00 or was not determined. Author defined 0.03 0.53 parts per million (ppm) Nd_max_ppm Maximum neodymium (Nd) value in the sample, in parts per million (ppm). Author defined 0.52 40.84 parts per million (ppm) Nd_min_ppm Minimum neodymium (Nd) value in the sample, in parts per million (ppm). Author defined 0.03 2.86 parts per million (ppm) Nd_median_ppm Median neodymium (Nd) concentration, in parts per million (ppm). Author defined 0.12 5.15 parts per million (ppm) Sm_max_ppm Maximum samarium (Sm) value in the sample, in parts per million (ppm). Author defined 0.89 39.94 parts per million (ppm) Sm_min_ppm Minimum samarium (Sm) value in the sample, in parts per million (ppm). Author defined 0.04 2.52 parts per million (ppm) Sm_median_ppm Median samarium (Sm) concentration, in parts per million (ppm). Author defined 0.24 5.66 parts per million (ppm) Eu_max_ppm Maximum europium (Eu) value in the sample, in parts per million (ppm). Author defined 0.50 13.84 parts per million (ppm) Eu_min_ppm Minimum europium (Eu) value in the sample, in parts per million (ppm). Author defined 0.01 1.48 parts per million (ppm) Eu_median_ppm Median europium (Eu) concentration, in parts per million (ppm). Author defined 0.18 2.50 parts per million (ppm) Gd_max_ppm Maximum gadolinium (Gd) value in the sample, in parts per million (ppm). Author defined 9.01 182.19 parts per million (ppm) Gd_min_ppm Minimum gadolinium (Gd) value in the sample, in parts per million (ppm). Author defined 0.23 16.31 parts per million (ppm) Gd_median_ppm Median gadolinium (Gd) concentration, in parts per million (ppm). Author defined 2.94 30.00 parts per million (ppm) Ho_max_ppm Maximum holmium (Ho) value in the sample, in parts per million (ppm). Author defined 24.69 250.67 parts per million (ppm) Ho_min_ppm Minimum holmium (Ho) value in the sample, in parts per million (ppm). Author defined 0.91 32.38 parts per million (ppm) Ho_median_ppm Median holmium (Ho) concentration, in parts per million (ppm). Author defined 4.54 79.32 parts per million (ppm) Tb_max_ppm Maximum terbium (Tb) value in the sample, in parts per million (ppm). Author defined 4.53 58.70 parts per million (ppm) Tb_min_ppm Minimum terbium (Tb) value in the sample, in parts per million (ppm). Author defined 0.19 6.84 parts per million (ppm) Tb_median_ppm Median terbium (Tb) concentration, in parts per million (ppm). Author defined 1.25 15.79 parts per million (ppm) Dy_max_ppm Maximum dysprosium (Dy) value in the sample, in parts per million (ppm) Author defined 53.34 642.33 parts per million (ppm) Dy_min_ppm Minimum dysprosium (Dy) value in the sample, in parts per million (ppm). Author defined 2.70 73.19 parts per million (ppm) Dy_median_ppm Median dysprosium (Dy) concentration, in parts per million (ppm). Author defined 14.00 190.74 parts per million (ppm) Er_max_ppm Maximum erbium (Er) value in the sample, in parts per million (ppm). Author defined 115.95 1145.61 parts per million (ppm) Er_min_ppm Minimum erbium (Er) value in the sample, in parts per million (ppm). Author defined 3.49 154.95 parts per million (ppm) Er_median_ppm Median erbium (Er) concentration, in parts per million (ppm). Author defined 24.79 373.49 parts per million (ppm) Tm_max_ppm Maximum thulium (Tm) value in the sample, in parts per million (ppm). Author defined 28.43 254.44 parts per million (ppm) Tm_min_ppm Minimum thulium (Tm) value in the sample, in parts per million (ppm). Author defined 0.65 36.17 parts per million (ppm) Tm_median_ppm Median thulium (Tm) concentration, in parts per million (ppm). Author defined 6.67 85.67 parts per million (ppm) Yb_max_ppm Maximum ytterbium (Yb) value in the sample, in parts per million (ppm). Author defined 260.41 2615.10 parts per million (ppm) Yb_min_ppm Minimum ytterbium (Yb) value in the sample, in parts per million (ppm). Author defined 5.01 332.66 parts per million (ppm) Yb_median_ppm Median ytterbium (Yb) concentration, in parts per million (ppm). Author defined 68.86 799.16 parts per million (ppm) Lu_max_ppm Maximum lutetium (Lu) value in the sample, in parts per million (ppm). Author defined 47.74 618.85 parts per million (ppm) Lu_min_ppm Minimum lutetium (Lu) value in the sample, in parts per million (ppm). Author defined 0.91 81.25 parts per million (ppm) Lu_median_ppm Median lutetium (Lu) concentration, in parts per million (ppm). Author defined 17.44 183.65 parts per million (ppm) Hf_max_ppm Maximum hafnium (Hf) value in the sample, in parts per million (ppm). Author defined 10468.03 18985.14 parts per million (ppm) Hf_min_ppm Minimum hafnium (Hf) value in the sample, in parts per million (ppm). Author defined 7120.55 11852.92 parts per million (ppm) Hf_median_ppm Median hafnium (Hf) concentration, in parts per million (ppm). Author defined 8888.06 13971.83 parts per million (ppm) Pb_max_ppm Maximum lead (Pb) value in the sample, in parts per million (ppm). Author defined 0.52 80.27 parts per million (ppm) Pb_min_ppm Minimum lead (Pb) value in the sample, in parts per million (ppm). Author defined 0.03 5.14 parts per million (ppm) Pb_median_ppm Median lead (Pb) concentration, in parts per million (ppm). Author defined 0.10 11.06 parts per million (ppm) Th_max_ppm Maximum thorium (Th) value in the sample, in parts per million (ppm). Author defined 42.92 3977.13 parts per million (ppm) Th_min_ppm Minimum thorium (Th) value in the sample, in parts per million (ppm). Author defined 0.63 261.50 parts per million (ppm) Th_median_ppm Median thorium (Th) concentration, in parts per million (ppm). Author defined 4.15 657.35 parts per million (ppm) U_max_ppm Maximum uranium (U) value in the sample, in parts per million (ppm). Author defined 378.09 5956.60 parts per million (ppm) U_min_ppm Minimum uranium (U) value in the sample, in parts per million (ppm). Author defined 46.96 757.25 parts per million (ppm) U_median_ppm Median uranium (U) concentration, in parts per million (ppm). Author defined 98.48 2072.43 parts per million (ppm) Ta_max_ppm Maximum tantalum (Ta) value in sample, in parts per million (ppm). Blank values indicate a value was not calculated or determined for that sample. Author defined 1.23 52.57 parts per million (ppm) Ta_min_ppm Minimum tantalum (Ta) value in sample, in parts per million (ppm). Blank values indicate a value was not calculated or determined for that sample. Author defined 0.42 2.27 parts per million (ppm) Ta_median_ppm Median tantalum (Ta) concentration, in parts per million (ppm). Cell is blank if both Ta_max_ppm and Ta_min_ppm have value 0.00 or is undetermined. Author defined 0.93 4.66 parts per million (ppm) T_C_median Ti-in-zircon thermometer (degrees C), after Ferry and Watson (2007), calculated using median Ti concentrations and assuming aSiO2 of 1.0 and aTiO2 of 0.7. Author defined 624.03 818.14 degrees C geochronology_SHRIMP-RG_yukonTananaUpland_kreiner.csv Table with sample information and measured concentration values for trace element concentration data. The table consists of 1022 indexed entries. Presented in a Comma Separated Value (CSV) formatted table. Author defined Index Numerical sorting value for data entries within the table. Author defined 1 1022 Sample Sample number assigned by collectors in the field; USGS identifier. Author defined Sample numbers are alphanumeric sequences that identify collector initials, year collected, and may include dashes and/or decimals, and additional numbers to indicate collection sequence that can be correlated to a specific location. Samples from drill core include an alphanumeric sequence that identify the year drilled, the initials of the prospect, and depth in meters. Mount Internal laboratory ID designator number for sample mount. Author defined All numerical mount designations in this dataset contain the letters 'CHD', followed by a three digit number, indicating a specific and repeatable laboratory mount arrangement. Date Month and year when the laboratory analysis was conducted. Author defined 2019-04 2020-10 Date (YYYY-MM) Timestamp Date and time of analysis for individual analysis spot. Author defined 2019-04-30, 19:20 2020-10-30, 15:34 Date Time (YYYY-MM-DD, hh:mm) Spot_ID A unique internal ID number of individual analysis spot, generally the sample name followed by a number for each individual grain. Author defined Values in this dataset vary significantly, but tend to be a concatenation of field 'Sample', a hyphen, a number, and a decimal point followed by a number. Excluded_median Grains omitted from calculation of median trace element composition for zircon populations. These include all grains excluded due to suspected contamination by inclusions imparting non-zircon signal on integration of measured trace elements. "Yes" if excluded. Author defined Blank cell Grains were not omitted from calculations. Author defined Yes Grains were omitted from calculations due to suspected contamination. Author defined Li_ppm Lithium (Li) concentration, in parts per million (ppm). An entry of 'bdl' indicates the value measured was below detectable limits of the instrument. Author defined 0.01 53.29 parts per million (ppm) B_ppm Boron (B) concentration, in parts per million (ppm). Entries of 'n.c.' (not calculated) are due to failure of Mount CHD094 to record boron measurements. An entry of 'bdl' indicates the value measured was below detectable limits of the instrument. Author defined 0.01 38.48 parts per million (ppm) F_ppm Fluorine (F) concentration, in parts per million (ppm). An entry of 'bdl' indicates the value measured was below detectable limits of the instrument. Author defined 0.12 53445.13 parts per million (ppm) Na_ppm Sodium (Na) concentration, in parts per million (ppm). Author defined 0.13 15783.33 parts per million (ppm) Al_ppm Aluminum (Al) concentration, in parts per million (ppm). Author defined 1.07 24785.43 parts per million (ppm) P_ppm Phosphorous (P) concentration, in parts per million (ppm). Author defined 19.08 70150.16 parts per million (ppm) K_ppm Potassium (K) concentration, in parts per million (ppm). Author defined 0.01 11540.34 parts per million (ppm) Ca_ppm Calcium (Ca) concentration, in parts per million (ppm). Author defined 0.26 36140.06 parts per million (ppm) Sc_ppm Scandium (Sc) concentration, in parts per million (ppm). Author defined 0.10 1982.03 parts per million (ppm) Ti_ppm Titanium (Ti) concentration, in parts per million (ppm). An entry of 'bdl' indicates the value measured was below detectable limits of the instrument. Author defined 0.10 24250.33 parts per million (ppm) Fe_ppm Iron (Fe) concentration, in parts per million (ppm). Author defined 0.28 26674.26 parts per million (ppm) Y_ppm Yttrium (Y) concentration, in parts per million (ppm). Author defined 31.23 18485.54 parts per million (ppm) Nb_ppm Niobium (Nb) concentration, in parts per million (ppm). An entry of 'bdl' indicates the value measured was below detectable limits of the instrument. Author defined 0.32 397.58 parts per million (ppm) La_ppm Lanthanum (La) concentration, in parts per million (ppm); n.c. for not calculated. An entry of 'bdl' indicates the value measured was below detectable limits of the instrument. Author defined 0.01 7190.87 parts per million (ppm) Ce_ppm Cerium (Ce) concentration, in parts per million (ppm). Author defined 0.03 17260.12 parts per million (ppm) Pr_ppm Praseodymium (Pr) concentration, in parts per million (ppm). Blank cells are present where not analyzed or determined. Author defined 0.02 2773.92 parts per million (ppm) Nd_ppm Neodymium (Nd) concentration, in parts per million (ppm). An entry of 'bdl' indicates the value measured was below detectable limits of the instrument. Author defined 0.02 15139.45 parts per million (ppm) Sm_ppm Samarium (Sm) concentration, in parts per million (ppm). Author defined 0.04 2005.96 parts per million (ppm) Eu_ppm Europium (Eu) concentration, in parts per million (ppm). An entry of 'bdl' indicates the value measured was below detectable limits of the instrument. Author defined 0.01 88.29 parts per million (ppm) Gd_ppm Gadolinium (Gd) concentration, in parts per million (ppm). An entry of 'bdl' indicates the value measured was below detectable limits of the instrument. Author defined 0.03 2701.99 parts per million (ppm) Ho_ppm Holmium (Ho) concentration, in parts per million (ppm). Author defined 0.03 320.90 parts per million (ppm) Tb_ppm Terbium (Tb) concentration, in parts per million (ppm). An entry of 'bdl' indicates the value measured was below detectable limits of the instrument. Author defined 0.01 403.98 parts per million (ppm) Dy_ppm Dysprosium (Dy) concentration, in parts per million (ppm). Author defined 0.22 2004.93 parts per million (ppm) Er_ppm Erbium (Er) concentration, in parts per million (ppm). Author defined 0.43 1184.65 parts per million (ppm) Tm_ppm Thulium (Tm) concentration, in parts per million (ppm). Author defined 0.08 254.90 parts per million (ppm) Yb_ppm Ytterbium (Yb) concentration, in parts per million (ppm). Author defined 0.83 2615.10 parts per million (ppm) Lu_ppm Lutetium (Lu) concentration, in parts per million (ppm). Author defined 0.49 618.85 parts per million (ppm) Hf_ppm Hafnium (Hf) concentration, in parts per million (ppm). Author defined 23.67 24686.18 parts per million (ppm) Pb_ppm Lead (Pb) concentration, in parts per million (ppm); n.c. for not calculated. Author defined 0.03 86.59 parts per million (ppm) Th_ppm Thorium (Th) concentration, in parts per million (ppm). Author defined 0.63 7568.89 parts per million (ppm) U_ppm Uranium (U) concentration, in parts per million (ppm). Author defined 1.25 7623.99 parts per million (ppm) Ta_ppm Tantalum (Ta) concentration, in parts per million (ppm). Blank cells are present where not analyzed or determined. Author defined 0.02 166.96 parts per million (ppm) T_C Ti-in-zircon thermometer (degrees C), after Ferry and Watson (2007), assuming aSiO2 and aTiO2 of 0.7; n.c. for values not calculated due to low Ti concentration. Author defined 460.87 3824.73 degrees Celsius SHRIMP-RG Zircon trace element Supplemental Info.pdf "Supplemental Info: Zircon trace element analytical methods using Stanford-USGS SHRIMP-RG": Document that describes the analytical methods and references for the analyses. Provided in PDF format. Author defined U.S. Geological Survey USGS ScienceBase Team Mailing and Physical

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Denver Colorado 80225 USA 1-888-275-8747 sciencebase@usgs.gov The U.S. Geological Survey, Alaska Science Center is the authoritative source of these data, distributed by ScienceBase (a USGS Trusted Digital Repository). Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data for other purposes or on all computer systems, nor shall the act of distribution constitute any such warranty. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. CSV, PDF Tabular data in CSV format; supplemental documentation in PDF format; FGDC metadata in XML and HTML formats. https://doi.org/10.5066/P9Q6GYMH None 20250528 U.S. Geological Survey, Alaska Science Center Mailing and Physical

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Anchorage Alaska 99508 USA 907-786-7000 gs-ak_asc_datamanagers@usgs.gov FGDC Content Standard for Digital Geospatial Metadata (CSDGM) FGDC-STD-001-1998