Source compositions of large tephra-production eruptions in Alaska

Lubbers, JordanLoewen, M.W.Wallace, KristiCoombs, M.L.2024Source compositions of large tephra-production eruptions in AlaskacsvRaw Data FileRDF 2023-26Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys3 p.https://doi.org/10.14509/31091Source compositions of large tephra-production eruptions in Alaska, Raw Data File 2023-26, provides new in situ geochemical analyses from previously collected samples originally utilized/interpreted in the Geochemistry, Geophysics, Geosystems publication "Probabilistic source classification of large tephra producing eruptions using supervised machine learning: An example from the Alaska-Aleutian arc" (Lubbers, Loewen, and others, 2023). The samples and analyses comprise 31 eruptions from 16 Alaska volcanoes. All samples have been archived in the Geologic Database of Information on Volcanoes in Alaska (GeoDIVA; Cameron and others, 2022, doi.org/10.14509/geodiva). They are available from the DGGS website: http://doi.org/10.14509/31091.These samples were collected over many years during geologic investigations of the eruptive histories of these source volcanoes and in regional studies of eruption impacts. They are compiled here to support research characterizing the composition and impacts of these volcanoes. These data describe the nature of samples from a past eruption to aid in discussing Alaska volcanism's spatial and temporal patterns. In addition, the work supports improvements to eruption scenario forecasts and hazard response.>EPMA: This table includes electron probe microanalyzer (EPMA) analyses. Analyses are of matrix glass. This table can be linked to the Samples table by the AT_num column. >EPMAStandards: This table includes EPMA standard reference material (SRM) analyses. This table includes summary statistics for EPMA SRM analyses. The EPMAStandardsSummary and the LaserStandardsSummary tables are not machine-readable and are supplementary tables to the text. >Laser: This table includes laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) analyses of matrix glass. This table can be linked to the Samples table by the AT_num column. >LaserStandards: This table includes LA-ICP-MS SRM analyses. The summary table includes summary statistics for LA-ICP-MS SRM analyses. The LaserStandardsSummary and the EPMAStandardsSummary tables are not machine-readable and are supplementary tables to the text. >References: This table includes references used throughout the following tabs. There are columns for âshortâ (i.e., in-text) and full (i.e., bibliography) versions of each reference. >Samples: This table includes metadata for all analyzed samples. Samples can be linked across tables using the AT_num column. >Stations: Station observations and station coordinates.19922023ground conditionCompleteNone planned-178.790000-180.00000063.00000051.760000ISO 19115 Topic CategorygeoscientificInformationAlaska Division of Geological & Geophysical SurveysActive VolcanoesAnalysesAnalyses and SamplingAnalytical Lab ResultsAnalytical ResultsAshfallChemistryCoastalCoastal and RiverDGGSGeochemical DataGeochemistryGeochronologyGeologicGeologic HazardsGeological ProcessGeologyGlassHazardsIgneousLab MethodsLaser AblationMethodsMicroprobe AnalysisPyroclasticsRhyoliteSample LocationStatisticsTephraTrace ElementsVolcanicVolcanic AshVolcanic EruptionVolcanic RocksVolcaniclastic DepositsVolcaniclasticsVolcanoesVolcanologyAlaska Division of Geological & Geophysical SurveysAdagdakAkutan VolcanoAlaska RangeAleutian IslandsAleutian PeninsulaAniakchak CalderaArch RockAshishik PointBlack CreekBlack LakeBlack NoseBristol BayBunker HillButtress RangeCave RockCold BayEmmons Lake CalderaExpedition IslandFalling MountainFish RockFisher CalderaGareloiGoblers KnobHayes RiverHayes VolcanoHidden CreekIliuliuk HarborKaguyakKatmaiKatmai CalderaMageik CreekMakushinMakushin VolcanoMount ChurchillMount VeniaminofNorth CreekNovaruptaOkmokSemisopochnoiSouth ChannelSpring CreekTuscarora RockUkinrek MaarsUnalaskaUnalaska BayUnalaska LakeVeniaminofThis 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 the field geologists who, over numerous decades, collected most of the samples used in this project. Analytical assistance was provided by Dawn Ruth (EPMA) and Chris Russo (LA-ICP-MS). We would also like to thank Simone Montayne and Laura Walkup for their constructive reviews. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.Loewen, M.W.Wallace, K.L.Lubbers, JordanRuth, DawnIzbekov, P.E.Larsen, J.F.Graham, Nathan2023Glass electron microprobe analyses methods, precision and accuracy for tephra studies in AlaskaMiscellaneous PublicationMP 174Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys20 phttps://doi.org/10.14509/31045Loewen, M.W.Wallace, KristiCoombs, M.L.Mulliken, K.M.2024Tephra samples and analyses from Cook Inlet source volcanoes and Anchor Point, AlaskaRaw Data FileRDF 2023-25Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys4 phttps://doi.org/10.14509/31090Mulliken, K.M.Schaefer, J.R.Cameron, C.E.2018Geospatial distribution of tephra fall in Alaska: a geodatabase compilation of published tephra fall occurrences from the Pleistocene to the presentMiscellaneous PublicationMP 164Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys46 phttps://doi.org/10.14509/29847Wallace, K.L.Cameron, C.E.Waythomas, C.F.Perreault, J.M.2020Major-oxide and trace-element geochemical data from the tephra collected on Veniaminof volcano, AlaskaRaw Data FileRDF 2020-17Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys5 phttps://doi.org/10.14509/30578Wallace, K.L.Hayden, L.A.Neal, C.A.2017Major-element glass compositions of tephra from the circa 3.6 ka eruption of Aniakchak volcano, Alaska Peninsula, AlaskaRaw Data FileRDF 2017-9Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys9 phttps://doi.org/10.14509/29777Worden, A.K.Schaefer, J.R.Mulliken, K.M.2018Tephra occurrence in Alaska: a map-based compilation of stratigraphic tephra dataMiscellaneous PublicationMP 165Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys19 phttps://doi.org/10.14509/30059The data tables provide calculated 2 sigma level uncertainty values for all ages and isotope ratios. All requisite metadata for samples (e.g., collection date, location, collector) can be found by querying the Geologic Database for information on Volcanoes in Alaska (GeoDIVA; doi.org/10.14509/geodiva) using the StationID.Not applicableThis data releaase is complete.Locations were typically determined using various handheld GPS devices and thus are accurate to ~10 m. In some cases the station location is the volcano's default coordinates in GeoDiva.Field Data - Samples included in this report were collected over multiple field seasons between 1992 and 2021, supporting geologic investigations on individual volcanoes and regional studies. Latitude and longitude are reported in the NAD83 datum. Locations were typically determined using various handheld GPS devices and thus are accurate to approximately 10 m. Station names (StationID) were assigned to sample locations and areas of general observation; sample names (SampleID) correspond to specific samples and include sample descriptions. Laboratory id numbers (AT_num) were assigned during laboratory processing and analysis to keep track of "child" samples.2021Electron Microprobe Analyses - Tephra samples were mounted in epoxy and polished for EPMA analysis at the USGS Menlo Park JEOL JXA 8530 F+ EPMA. Detailed methodology of analysis accuracy and precision is found in Loewen and others (2023).2022Laser Ablation Analyses - Trace element concentrations in tephra were measured using an Applied Spectra RESOlution SE ArF excimer laser system connected to a ThermoFisher Scientific iCAP-RQ ICP-MS at the Oregon State University W.M. Keck Collaboratory for Plasma Spectrometry. Analyses were conducted with a 24 Âµm spot, pulse rate of 10 Hz, fluence of 7.2 J/cm2, and ablation time of 22 seconds. Elemental concentrations were calculated from raw signals using the software LaserTRAM-DB (Lubbers, Kent, and Russo, 2023), which follows the methodology of Longerich and others (1996). The silicon (Si) isotope 29Si was used as the internal standard, and GSE-1G was the primary calibration standard. Si concentrations were independently constrained using EPMA analyses of the same region of matrix glass. Secondary SRMs included GSD-1G, BCR-2G, ATHO-G, and NIST-612.2022point0.0000010.000001decimal degreesNAD83GRS 806378137298.257222101RDF2023-26_EPMA.csv, RDF2023-26_EPMA-data-dictionary.csvThis table includes electron probe microanalyzer (EPMA) analyses. Analyses are of matrix glass. This table can be linked to the Samples table by the AT_num column.AVO and DGGS staffEPMARDF2023-26_EPMAStandards.csv, RDF2023-26_EPMAStandardSummary.csvThis table includes EPMA standard reference material (SRM) analyses. This table includes summary statistics for EPMA SRM analyses. The EPMAStandardsSummary and the LaserStandardsSummary tables are not machine-readable and are supplementary tables to the text.AVO and DGGS staffEPMAStandardsRDF2023-26_Laser.csv, RDF2023-26_Laser-data-dictionary.csvThis table includes laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) analyses of matrix glass. This table can be linked to the Samples table by the AT_num column.AVO and DGGS staffLaserRDF2023-25_LaserStandards.csv, RDF2023-25_LaserStandardSummary.csvThis table includes LA-ICP-MS SRM analyses. The summary table includes summary statistics for LA-ICP-MS SRM analyses. The LaserStandardsSummary and the EPMAStandardsSummary tables are not machine-readable and are supplementary tables to the text.AVO and DGGS staffLaserStandardsrdf2023-26_References.csvThis table includes references used throughout the following tabs. There are columns for âshortâ (i.e., in-text) and full (i.e., bibliography) versions of each reference.AVO and DGGS staffReferencesrdf2023-26_Samples.csv, rdf2023-26_Samples-data-dictionary.csvThis table includes metadata for all analyzed samples. Samples can be linked across tables using the AT_num column.AVO and DGGS staffSamplesRDF2023-26_Stations.csv, RDF2023-26_Stations-data-dictionary.csvStation observations and station coordinates.AVO and DGGS staffStationsAlaska 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 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