{"action":"create","ckan_id":null,"date_created":"Sat, 31 Jan 2026 20:27:54 GMT","date_finished":null,"harvest_job_id":"a5e813c4-a94c-4ffd-a1d1-57048cb5e512","harvest_source_id":"31f41541-38a0-400b-b240-10ebcb0acd9a","id":"421f07da-a625-41ab-821d-906adff551f1","identifier":"https://dggs.alaska.gov/webpubs/metadata/RDF2024-29.xml","parent_identifier":null,"source_hash":"b999ac061a364f2102530f0a0e3f6e92145e5a04681e2dfd917fed53c859ada7","source_raw":"Gillis, R.J.O'Sullivan, P.B.Donelick, R.A.2024Zircon U-Pb ages of the Valdez Group and the Passage Canal and Billings plutons from the Passage Canal area of Prince William Sound, AlaskacsvRaw Data FileRDF 2024-29Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys13 p.https://doi.org/10.14509/31427Zircon U-Pb ages of the Valdez Group and the Passage Canal and Billings plutons from the Passage Canal area of Prince William Sound, Alaska, Raw Data File 2024-29, provides zircon U-Pb results from samples collected in conjunction with geologic mapping of the Passage Canal area near Whittier, Alaska. These analyses help constrain the ages of major mapped bedrock units (Bull and others, 2024). The rock units include Cretaceous Valdez Group marine strata and the Passage Canal and Billings plutons. These data and report are available from the DGGS website: http://doi.org/10.14509/31427.The city of Whittier, Alaska (pop. ~250), is one of only two all-weather, ice-free ports that serve the Alaska mainland via both railroad and road access. The city lies about 100 km by road southeast of Anchorage near the head of Passage Canal, a deep fjord in western Prince William Sound. The geologic mapping supports informed community planning, mitigation, and emergency response in and around this high-risk community and its associated critical infrastructure.>geochron-data: Analytical lab data\t\r\n>geochron-summary: Identification numbers, coordinates, sample descriptions, and summary ages of each sample20122024ground conditionCompleteNone planned-148.850420-148.49242060.86881060.802600ISO 19115 Topic CategorygeoscientificInformationAlaska Division of Geological & Geophysical SurveysAge DatesAnalysesAnalyses and SamplingAnalytical Lab ResultsAnalytical ResultsBedrockBedrock GeologyDGGSGeochronologyGeologicGeological ProcessGeologyGraniteIgneousIgneous RocksIntrusiveIsotopesLab MethodsLeadMetamorphicMetamorphic RocksMetamorphismMetasedimentary RocksMethodsPlutonicPlutonic RocksPlutonsRock UnitsRocksSTATEMAP ProjectSample LocationSedimentary RocksSedimentationU-PbZirconAlaska Division of Geological & Geophysical SurveysBillings CreekSouthcentral AlaskaWhittierAlaska Division of Geological & Geophysical SurveysValdez GroupWalker, J.D., Geissman, J.W., Bowring, S.A, and Babcock, L.E., comp., 2012, Geologic Time Scale v. 4.0: Geological Society of AmericaCretaceousPaleogeneThis 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).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.Alaska Division of Geological & Geophysical SurveysMetadata Managermailing and physical
3354 College Road
FairbanksAK99709-3707USA(907)451-5020(907)451-5050dggspubs@alaska.gov8 am to 4:30 pm, Monday through Friday, except State holidaysPlease view our website (https://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible.We thank Pathfinder Aviation and pilot Spanky Handley for their exceptional work in difficult circumstances and the people of Whittier for their kindness and generosity. We greatly appreciate the Chugach Alaska Native Corporation and the U.S. Forest Service for their helpfulness and access to their lands during this study.\r\nThese analyses were funded by the 2012 U.S. Geological Survey National Cooperative Geologic Mapping Program, award number G12AS00007. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the opinions or policies of the U.S. Geological Survey. Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey.Freeman, L.K.Montayne, SimoneWypych, Alicja2017Major-oxide and trace-element geochemical data from rocks collected near Panorama Mountain, Mile 104 Seward Highway, Crow Pass, and Whittier, AlaskaRaw Data FileRDF 2017-12Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys4 phttps://doi.org/10.14509/29725Hubbard, T.D.Wolken, G.J.Stevens, D.S.P.Combellick, R.A.2013High-resolution lidar data for the Whittier area, Passage Canal, and Portage Lake, AlaskaRaw Data FileRDF 2013-3Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys5 phttps://doi.org/10.14509/24976Nicolsky, D.J.Suleimani, E.N.Combellick, R.A.Hansen, R.A.2011Tsunami inundation maps of Whittier and western Passage Canal, AlaskaReport of InvestigationRI 2011-7Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys65 p., 4 sheets, scale 1:14,000https://doi.org/10.14509/23244Nicolsky, D.J.Wolken, G.J.Combellick, R.A.Hansen, E.2011APPENDIX B: Potential rockfall-generated tsunami at Whittier, AlaskaReport of InvestigationRI 2011-7AFairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveysp. 57-65https://doi.org/10.14509/23283Nicolsky, D.J.Suleimani, E.N.2018Potential maximum permanent flooding, Whittier, AlaskaReport of InvestigationRI 2011-7BFairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys1 sheet, scale 1:6,500https://doi.org/10.14509/30110Wolken, G.J.Balazs, M.S.2014Inventory and preliminary assessment of geologic hazards in the Passage Canal-Portage Valley area, south-central AlaskaPreliminary Interpretive ReportPIR 2014-1Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys15 phttps://doi.org/10.14509/27302Rock and outcrop descriptions at field stations presented herein are reconnaissance observations and interpretations made by project geologists in the field. The accompanying report provides a comprehensive bibliographic reference list of prior work identifying and delineating rock units and structural elements and a more comprehensive summary of the analytical methods. When applicable, errors are reported in the data tables. This data set is being released into 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 about the analytical values or procedures can be best answered by the originating lab.Not applicableThis data release is complete.Sample locations were recorded using modern, hand-held GPS units set to UTM Zone 6 (NAD27) coordinates with typical horizontal precision of 9 to 21 feet. Locations presented herein were converted to NAD27 geographic coordinates.Sample collection - We selected approximately 10-15 kg of the freshest, most unaltered and unweathered rock available at each of three sampled locations. Sample 12BG300A was a medium- to fine-grained sandstone metamorphosed to greenschist facies. Samples 12BG303A and 12BG308A were phaneritic intrusive rocks with unaltered mafic mineral phases, visible striae on crystal faces, and appeared to be free of chloritic alteration or oxidation. Sample locations were recorded using modern, hand-held GPS units set to UTM Zone 6 (NAD27) coordinates with typical horizontal precision of 9 to 21 feet. Locations presented herein were converted to NAD27 geographic coordinates.2012Zircon U-Pb LA-ICP-MS analysis - Zircon grains were isolated and prepared for Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry (LA-ICP-MS) analyses. Zircon U-Pb data were acquired for LA-ICP-MS analysis at Donelick Properties in Viola, Washington, using a Resonetics RESOlution M-50 ArF Excimer 193 nm laser attached to an Agilent 7700x quadrupole inductively coupled plasma mass spectrometer. Maximum depositional ages (MDA) defined by populations of young zircons were determined for the Valdez Group sample. All weighted-mean calculations, and weighted mean, Concordia, and kernel density estimate plots were determined and produced using IsoplotR. Maximum depositional ages (MDA) defined by populations of young zircons were determined for the Valdez Group sample. To determine its MDA, we calculated the youngest statistical population (YSP). To determine the crystallization age of the igneous rocks we used the commonly adopted method of calculating the WM of the entire zircon distribution, recognizing that the resulting mean standard weighted deviation (MSWD) is much greater than 1.0 and the probability of fits of zero indicates dispersion of dates greater than expected for a genetically congruent population.2023point0.00000010.0000001decimal degreesNAD27Clarke 18666378206.4294.9786982rdf2024-29-UPb-data.zip, rdf2024-29-UPb-data-dictionary.xlsxAnalytical lab dataDGGS, see report for additional detailgeochron-datardf2024-29-UPb-summary-data.xlsx, rdf2023-15-geochron-summary-data-dictionary.csvIdentification numbers, coordinates, sample descriptions, and summary ages of each sampleDGGS, see report for additional detailgeochron-summaryAlaska Division of Geological & Geophysical SurveysMetadata Managermailing and physical
3354 College Road
FairbanksAK99709-3707USA(907)451-5020(907)451-5050dggspubs@alaska.gov8 am to 4:30 pm, Monday through Friday, except State holidaysPlease view our website (https://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible.RDF 2024-29The 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.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.Contact DGGS for current pricingcsv20241030tablehttps://doi.org/10.14509/31427Free download20241030Alaska Division of Geological & Geophysical SurveysSimone MontayneMetadata Managermailing and physical
3354 College Road
FairbanksAK99709-3707USA(907)451-5020(907)451-5050dggspubs@alaska.gov8 am to 4:30 pm, Monday through Friday, except State holidaysFGDC Content Standard for Digital Geospatial MetadataFGDC-STD-001-1998If 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.https://dggs.alaska.gov/metadata/dggs.extdggs metadata extensions","source_transform":null,"status":"error"}