{"action":"create","ckan_id":null,"date_created":"Wed, 08 Apr 2026 06:53:21 GMT","date_finished":null,"harvest_job_id":"abb06220-7a4b-40a2-ac1f-706b64ae3bfc","harvest_source_id":"f4c7bbab-c7ef-4277-a7d3-c25b78854814","id":"11945cc4-0c27-4d0a-bcd0-ffb27b304539","identifier":"https://dggs.alaska.gov/webpubs/metadata/RDF2017-1.xml","parent_identifier":null,"source_hash":"940f6305c15e92aca4fed245f01126aaae9744d1684880a6eacd62b8323c70c2","source_raw":"\n\n\n\n\nBenowitz, J.A.\nLayer, P.W.\nWypych, Alicja\nTwelker, Evan\n2017\n40Ar/39Ar data from rocks collected in the 2015 Wrangellia mineral assessment project area, Mount Hayes A-5, Mount Hayes B-6, and Talkeetna Mountains D-2 quadrangles, Alaska\nreport digital data\n\nRaw Data File\nRDF 2017-1\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\n9 p.\nhttp://doi.org/10.14509/29699\n\n\n\nThis report presents 40Ar/39Ar step-heating geochronology results for igneous and metamorphic rocks from the Alaska Division of Geological & Geophysical Surveys' (DGGS) Wrangellia Mineral Assessment project, part of a multi-year effort focusing on improving the publicly available geoscientific information for the western Wrangellia terrane. The samples described in this report were selected and analyzed to improve our understanding of the geology and structural history of the Wrangellia Mineral Assessment project area. A metagabbro rock sample returned a Late Triassic crystallization age consistent with regional ages for Nikolai Greenstone-related magmatism; however, the two amphibole separates ages do not overlap, and have larger errors than expected due to alteration. An Early Cretaceous age obtained on a syenogranite pluton could correspond to similar ages of an Early Cretaceous porphyry event within the Grubstake Cu-Au porphyry system, Slana Region. Finally, we obtained Oligocene ages for a dacitic dike and a schist; the schist age constrains the timing of displacement on a thrust fault in the area. Analyses were performed by the University of Alaska Fairbanks (UAF) Geochronology Laboratory, and results were reported by Jeff Benowitz and Paul Layer. Products included in this data release are a summary of sample collection methods, the laboratory report, analytical data tables and associated metadata, and plots of the 40Ar/39Ar age spectra and Ca/K and Cl/K ratios.\nThe DGGS Mineral Resources section carried out geologic mapping and sampling in the eastern Denali Highway region between Watana Creek and Paxson from July 29 through August 7, 2015. The project focused on characterization of a broad section of Wrangellia stratigraphy, including Late Triassic rocks of the Ni-Cu-Co-PGE- and Cu-Ag-mineralized Wrangellia large igneous province, as well as modern geochemical characterizations of skarn-, vein-, and basalt-hosted Cu mineralization. The samples described in this report were selected and analyzed to improve our understanding of the geology and structural history of the Wrangellia Mineral Assessment project area.\n\n>summary-data-locations: Identification numbers, coordinates, sample descriptions, and summary ages of each sample\n>step-heating-data: Power output levels and resultant measurements from each sample run\n\n\n\n\n\n2015\n2017\n\n\nground condition\n\n\ncomplete\nNone planned\n\n\n\n-147.715591\n-146.014124\n63.319838\n62.850927\n\n\n\n\nISO 19115 Topic Category\ngeoscientificInformation\n\n\nAlaska Division of Geological & Geophysical Surveys\n40Ar/39Ar\nAnalyses\nAnalyses and Sampling\nAnalytical Lab Results\nAnalytical Results\nAr-Ar\nBasalt\nBedrock\nBedrock Geology\nCopper\nCrystals\nGeochronology\nGeologic\nGeology\nGreenstone\nHornblende\nIgneous\nIgneous Rocks\nInterpretation\nLab Methods\nMethods\nMica\nMineral Composition\nMineralogy\nMineral Resources\nMinerals\nMuscovite\nPlutonic Rocks\nPorphyry\nResources\nRocks\nSample Location\nStrategic and Critical Minerals Assessment Project\nStrategic Minerals\nStratigraphy\nStructural Geology\nThrust\nVolcanic Rocks\n\n\nAlaska Division of Geological & Geophysical Surveys\nHayes\nMount Hayes Quadrangle\nTalkeetna\nTalkeetna Mountains\nTalkeetna Mountains Quadrangle\n\n\nAlaska Division of Geological & Geophysical Surveys\nNikolai Greenstone\nWrangellia Terrane\n\n\nWalker, J.D., Geissman, J.W., Bowring, S.A, and Babcock, L.E., comp., 2012, Geologic Time Scale v. 4.0: Geological Society of America\nCretaceous\nOligocene\nTriassic\n\n\nThis 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).\nAny 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.\n\n\n\nAlaska Division of Geological & Geophysical Surveys\n\nMetadata Manager\n\nmailing and physical\n
3354 College Road
\nFairbanks\nAK\n99709-3707\nUSA\n\n(907)451-5039\n(907)451-5050\ndggspubs@alaska.gov\n8 am to 4:30 pm, Monday through Friday, except State holidays\n\n\nThis project was funded by Capital Improvement Project funds through the State's Strategic and Critical Minerals Assessment project, a component of the Alaska Airborne Geophysical/Geological Mineral Inventory Program funded by the Alaska State Legislature and managed by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys.\n\n\nTwelker, Evan\nHubbard, T.D.\nWypych, Alicja\nSicard, K.R.\nNewberry, R.J.\nReioux, D.A.\nFreeman, L.K.\nLande, L.L.\n2015\nGeologic map of the Talkeetna Mountains C-4 Quadrangle and adjoining areas, central Alaska\n\nPreliminary Interpretive Report\nPIR 2015-6\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\n16 p., 1 sheet, scale 1:50,000\nhttp://doi.org/10.14509/29470\n\n\n\n\nTwelker, Evan\nNewberry, R.J.\nFreeman, L.K.\nSicard, K.R.\nReioux, D.A.\nBachmann, E.N.\n2013\nDGGS geologic and mineral-resource assessment of the western Wrangellia terrane, central Alaska: Initial progress report (presentation): Alaska Miners Association Annual Convention, Anchorage, Alaska, November 4-10, 2013\n\nPoster and Presentation\nTwelker, Evan and others, 2013\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\n25 p\nhttp://doi.org/10.14509/26821\n\n\n\n\nTwelker, Evan\nBurns, L.E.\n2014\nNew geochemical and geophysical data from the western Wrangellia minerals assessment area (presentation): Alaska Miners Association 24th Biennial Mining Conference, Fairbanks, Alaska April 7-13, 2014\n\nPoster and Presentation\nTwelker, Evan and Burns, L.E., 2014\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\n34 p\nhttp://doi.org/10.14509/27284\n\n\n\n\nTwelker, Evan\nWypych, Alicja\nNewberry, R.J.\n2014\nNew data and insight on the Late Triassic Wrangellia magmatic Ni-Cu-Co-PGE system in the Talkeetna Mountains, central Alaska (poster): Society of Economic Geologists 2014 Conference, September 27-30, 2014\n\nPoster and Presentation\nTwelker, Evan and others, 2014\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\n1 sheet\nhttp://doi.org/10.14509/29139\n\n\n\n\nTwelker, Evan\nWypych, Alicja\nSicard, K.R.\nNewberry, R.J.\nFreeman, L.K.\nReioux, D.A.\nLande, Lauren\n2014\nPreliminary results from 2014 geologic mapping in the Talkeetna Mountains, Alaska (presentation): Alaska Miners Association Annual Convention, Anchorage, Alaska, November 3-9, 2014\n\nPoster and Presentation\nTwelker, Evan and others, 2014\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\n28 p\nhttp://doi.org/10.14509/29160\n\n\n\n\nLande, Lauren\nNewberry, R.J.\nTwelker, Evan\n2015\nA petrological model for emplacement of the ultramafic Ni-Cu-PGE Alpha complex, Eastern Interior, Alaska (poster): Geological Society of America Cordilleran Section - 111th Annual Meeting, Anchorage, Alaska, May 11-13, 2015\n\nPoster and Presentation\nLande, Lauren and others, 2015\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\n1 sheet\nhttp://doi.org/10.14509/29480\n\n\n\n\nTwelker, Evan\nLande, Lauren\n2015\nDGGS geological investigations in western Wrangellia (presentation): Alaska Miners Association Annual Convention, Anchorage, Alaska, November 1-5, 2015\n\nPoster and Presentation\nTwelker, Evan and Lande, Lauren, 2015\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\n45 p\nhttp://doi.org/10.14509/29531\n\n\n\n\nWypych, Alicja\nTwelker, Evan\nLande, L.L.\nNewberry, R.J.\n2015\nAlong-strike geochemical variations in the Late Triassic Nikolai magmatic system, Wrangellia, central Alaska (poster number V31D-3059): American Geophysical Union 2015 Fall Meeting, December 14-18, 2015\n\nPoster and Presentation\nWypych, Alicja and others, 2015\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\n1 sheet\nhttp://doi.org/10.14509/29567\n\n\n\n\nTwelker, Evan\nBachmann, E.N.\nFreeman, L.K.\nNewberry, R.J.\nReioux, D.A.\nSicard, K.R.\nTuzzolino, A.L.\nWright, T.C.\nWypych, Alicja\n2014\nMajor-oxide, minor-oxide, and trace-element geochemical data from rocks and stream sediments in the Wrangellia mineral assessment area, Gulkana, Healy, Mount Hayes, and Talkeetna Mountains quadrangles, Alaska\n\nRaw Data File\nRDF 2014-3\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\n6 p\nhttp://doi.org/10.14509/27181\n\n\n\n\nBenowitz, J.A.\nLayer, P.W.\nTwelker, Evan\n2014\n40Ar/39Ar data from rocks collected in 2013 in the Wrangellia mineral assessment area, Gulkana, Healy, Mount Hayes, and Talkeetna Mountains quadrangles, Alaska\n\nRaw Data File\nRDF 2014-18\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\n10 p\nhttp://doi.org/10.14509/29119\n\n\n\n\nWypych, Alicja\nTwelker, Evan\nFreeman, L.K.\nLande, Lauren\nNewberry, R.J.\nReioux, D.A.\nSicard, K.R.\n2014\nMajor-oxide and trace-element geochemical data from rocks collected in 2014 in the Wrangellia mineral assessment area, Talkeetna Mountains C-4, C-3, and B-4 quadrangles, Alaska\n\nRaw Data File\nRDF 2014-22\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\n4 p\nhttp://doi.org/10.14509/29140\n\n\n\n\nBenowitz, J.A.\nLayer, P.W.\nWypych, Alicja\nTwelker, Evan\n2015\n40Ar/39Ar data from the Talkeetna Mountains C-4 Quadrangle and adjoining areas, central Alaska\n\nRaw Data File\nRDF 2015-10\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\n19 p\nhttp://doi.org/10.14509/29454\n\n\n\n\nWypych, Alicja\nTwelker, Evan\nFreeman, L.K.\nLande, Lauren\nNewberry, R.J.\nReioux, D.A.\nSicard, K.R.\n2015\nMajor-oxide and trace-element geochemical data from rocks collected in 2015 in the Wrangellia mineral assessment area, Alaska\n\nRaw Data File\nRDF 2015-16\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\n4 p\nhttp://doi.org/10.14509/29518\n\n\n\n\n\nThis 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 data files can be best answered by the originating lab.\n\nnot applicable\nThis data release is complete.\n\n\nSamples were collected with location coordinates (WGS84 datum) determined using handheld GPS units (Trimble Juno T5), with a reported accuracy of about 10 m.\n\n\n\n\nFieldwork - Fresh, unweathered samples from surficial outcrops were collected by DGGS field geologists; samples were selected based on presence of sufficiently large crystals and/or fresh glassy matrix.\n2010\n\n\nSample preparation and analysis - Before processing, samples were examined under binocular microscope, or thin sections were prepared and scrutinized to eliminate the possibility of analyzing altered mineral phases. Rock samples that we found to be suitable for dating by 40Ar/39Ar geochronology analysis were submitted to the Geochronology Laboratory at the University of Alaska Fairbanks (UAF) where they were dated according to the protocols outlined in the accompanying report.\n2010\n\n\n\n\npoint\n\n\n\n\n0.00001\n0.00001\ndecimal degrees\n\n\nWorld Geodetic System of 1984\nWGS 84\n6378137\n298.257223563000025\n\n\n\n\n\n\nrdf2017-1-summary-data-locations.csv\nIdentification numbers, coordinates, sample descriptions, and summary ages of each sample\nAlaska Division of Geological & Geophysical Surveys\nsummary-data-locations\n\n\nSAMPLE\nLabel assigned in the field to identify the sample.\nAlaska Division of Geological & Geophysical Surveys\n\nGeneric 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.\n\n\n\nLAB_SAMPLE_NUMBER\nLabel used by the lab to identify the sample.\nAlaska Division of Geological & Geophysical Surveys and Geochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\nThe lab sample number is typically identical to the field sample number. However, in some cases, the sample number provided by 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.\n\n\n\nCOLLECTOR\nThe geologist who collected the sample.\nAlaska Division of Geological & Geophysical Surveys\n\nThe samples presented in this report were collected by the authors or other DGGS staff.\n\n\n\nLONGITUDE\nLongitude, WGS84\nAlaska Division of Geological & Geophysical Surveys\n\n\n-147.683996\n-146.046127\ndecimal degrees\n\n\n\n\nLATITUDE\nLatitude, WGS84\nAlaska Division of Geological & Geophysical Surveys\n\n\n62.865366\n63.3054\ndecimal degrees\n\n\n\n\nDATED_MATERIAL\nIndicates the type of material that was used for analysis\nAlaska Division of Geological & Geophysical Surveys and Geochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\nThe type of material that was selected for dating varied according to mineral composition and grainsize of the submitted rock sample. This field specifies whether the age was derived from a mineral separate (generally 1 to 10 individual crystals dated together as a single run), a single crystal, or the whole rock.\n\n\n\nMINERAL\nIndicates the mineral that was used for analysis\nAlaska Division of Geological & Geophysical Surveys and Geochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\nThe minerals selected for dating would typically be grains of biotite, hornblende, or muscovite.\n\n\n\nDESCRIP_1\nDescription of the sample\nAlaska Division of Geological & Geophysical Surveys\n\nCharacters 1 to 254 of a brief sample or station description.\n\n\n\nDESCRIP_2\nExtension of the sample or station description for descriptions which are greater than 254 characters in length\nAlaska Division of Geological & Geophysical Surveys\n\nCharacters greater than 254 of the sample or station description.\n\n\n\nNULL\nBlank (NULL) values indicate that the descriptive text is shorter than 254 characters.\nAlaska Division of Geological & Geophysical Surveys\n\n\n\n\nDESCRIP_3\nExtension of the sample or station description for descriptions which are greater than 509 characters in length\nAlaska Division of Geological & Geophysical Surveys\n\nCharacters greater than 509 of the sample or station description.\n\n\n\nNULL\nBlank (NULL) values indicate that the descriptive text is shorter than 509 characters.\nAlaska Division of Geological & Geophysical Surveys\n\n\n\n\nINTEGRATED_AGE_MA\nIntegrated age and age error in million years\nAlaska Division of Geological & Geophysical Surveys and Geochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\nThe values are a concatenation of the integrated age determination and the calculated error associated with the integrated age determination\n\n\n\nPLATEAU_AGE_MA\nPlateau age and age error in million years\nAlaska Division of Geological & Geophysical Surveys and Geochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\nThe values are a concatenation of the plateau age determination and the calculated error associated with the plateau age determination\n\n\n\nPLATEAU_REMARKS\nComments and additional values that pertain to the plateau age determination method or interpretation.\nAlaska Division of Geological & Geophysical Surveys and Geochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\nFree text\n\n\n\nAGE_TYPE_PREFERRED\nIndicates AGE_TYPE_PREFERRED age.\nAlaska Division of Geological & Geophysical Surveys and Geochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\nA discussion of the preferred age for each analysis is provided in the accompanying lab report. The possible values are: plateau, isochron, weighted average, or integrated.\n\n\n\nPREFERRED_AGE\nThe values are a concatenation of the preferred age determination and the calculated error associated with the preferred age determination\nAlaska Division of Geological & Geophysical Surveys and Geochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\nThe preferred age for each analysis is discussed in detail in the accompanying lab report.\n\n\n\n\n\nrdf2017-1-step-heating-data.csv\nPower output levels and resultant measurements from each sample run\nAlaska Division of Geological & Geophysical Surveys\nstep-heating-data\n\n\nSAMPLE\nLabel assigned in the field to identify the sample.\nAlaska Division of Geological & Geophysical Surveys\n\nGeneric 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.\n\n\n\nLAB_SAMPLE_NUMBER\nLabel used by the lab to identify the sample.\nAlaska Division of Geological & Geophysical Surveys and Geochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\nThe lab sample number is typically identical to the field sample number. However, in some cases, the sample number provided by 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.\n\n\n\nLaser_mW\nLaser output level in megawatts\nGeochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\n\n500\n9000\nmegawatts\n\n\n\n\nNULL\nA NULL or blank values indicates that the values in the row were calculated by weighting the individual heating steps by the fraction of 39Ar released.\nGeochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\n\n\n\nIntegrated\nWe indicate whether the values in the row were derived from a heating step or calculated by weighting the individual heating steps by the fraction of 39Ar released.\nAlaska Division of Geological & Geophysical Surveys\n\n\nNULL\nThe values in the row were derived from a heating step\nGeochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\n\n\n\nIntegrated\nthe values in this row were calculated by weighting the individual heating steps by the fraction of 39Ar released\nAlaska Division of Geological & Geophysical Surveys\n\n\n\n\nCum39Ar\nCumulative ratio of 39Argon released at this step\nGeochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\n\n0.011\n1\n\n\n\n\nNULL\nA NULL or blank values indicates that the value was not applicable or not calculated by the lab\nGeochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\n\n\n\nMe40Ar39Ar\nMeasured 40Ar/39Ar ratio for each heating step, corrected for blank and 39Ar decay\nGeochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\n\n4.16378\n3038.86308\n\n\n\n\nEr40Ar39Ar\nThe one sigma error for each 40Ar/39Ar measurement\nGeochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\n\n0.00576\n1739.05949\n\n\n\n\nMe37Ar39Ar\nThe ratio of measured 37Ar to measured 39Ar for each heating interval for each sample corrected for blank and 37Ar and 39Ar decay\nGeochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\n\n-0.0432\n47.03996\n\n\n\n\nEr37Ar39Ar\nThe one sigma error for each 37Ar/39Ar measurement\nGeochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\n\n0.00019\n2.38277\n\n\n\n\nMe36Ar39Ar\nRatio of measured 36Ar to measured 39Ar for each step interval for each sample corrected for blank and 39Ar decay\nGeochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\n\n-0.01277\n1.39354\n\n\n\n\nEr36Ar39Ar\nThe one sigma error for each 36Ar/39Ar measurement\nGeochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\n\n0.00004\n0.14835\n\n\n\n\nAtm40Ar\nPercent of 40Ar which is atmospheric in composition at each step level\nGeochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\n\n-29.7821\n107.59738\n\n\n\n\nErAtm40Ar\nThe one sigma error for the percent of 40Ar which is atmospheric in composition at each step level\nGeochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\n\n0.28248\n47.39787\n\n\n\n\nMeCaK\nRatio of Calcium to Potassium as determined from 37Ar/39Ar\nGeochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\n\n-0.07926\n89.27769\n\n\n\n\nErCaK\nThe one sigma error for each Ca/K determination\nGeochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\n\n0.00034\n4.67768\n\n\n\n\nMeClK\nRatio of Chlorine to Potassium as determined from 38Ar/39Ar\nGeochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\n\n-0.00284\n0.85412\n\n\n\n\nErClK\nThe one sigma error for each Cl/K determination\nGeochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\n\n0.00002\n0.0317\n\n\n\n\nAr40Rad39ArK\nRatio of radiogenic 40Ar to 39Ar derived from potassium\nGeochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\n\n-2.10524\n2924.23597\n\n\n\n\nEr40ArRad39ArK\nOne sigma error for each 40ArRad/39ArK value\nGeochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\n\n0.01733\n1742.12817\n\n\n\n\nAgeMa\nCalculated age for each temperature step for each sample\nGeochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\n\n-16.41\n4702.53\nMA\n\n\n\n\nErAgeMa\nOne sigma error of the age determination of each heating step\nGeochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\n\n0.13\n994.6\nMA\n\n\n\n\nWeightedAverageOfJFromStandards\nJ value, calculated from the weighted average of standards placed in various positions in the nuclear reactor\nGeochronology Laboratory at the University of Alaska Fairbanks (UAF)\n\nWeightedAverageOfJFromStandards value and error\n\n\n\n\n\n\n\n\nAlaska Division of Geological & Geophysical Surveys\n\nMetadata Manager\n\nmailing and physical\n
3354 College Road
\nFairbanks\nAK\n99709-3707\nUSA\n\n(907)451-5039\n(907)451-5050\ndggspubs@alaska.gov\n8 am to 4:30 pm, Monday through Friday, except State holidays\n\n\nRDF 2017-1\nThe 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.\n\nDGGS 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.\nContact DGGS for current pricing\n\n\n\n\nASCII tabular files\n\n\n\n\n\nhttp://doi.org/10.14509/29699\n\n\n\n\n\nFree download\n\n\n\n20170404\n\n\n\nAlaska Division of Geological & Geophysical Surveys\n\nMetadata Manager\n\nmailing and physical\n
3354 College Road
\nFairbanks\nAK\n99709-3707\nUSA\n\n(907)451-5039\n(907)451-5050\ndggspubs@alaska.gov\n8 am to 4:30 pm, Monday through Friday, except State holidays\n\n\nFGDC Content Standard for Digital Geospatial Metadata\nFGDC-STD-001-1998\nIf 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.\n\nhttp://www.dggs.alaska.gov/metadata/dggs.ext\ndggs metadata extensions\n\n\n\n","source_transform":null,"status":"error"}