26a4c4b8-4510-46a6-9ebf-ead35e4462a6_source eng; USA utf8 dataset Simone Montayne Alaska Division of Geological & Geophysical Surveys Metadata Manager (907)451-5020 (907)451-5050 3354 College Road Fairbanks AK 99709-3707 USA dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays pointOfContact 2024-02-02 ISO 19115 Geographic Information - Metadata ISO 19115:2003/Cor.1:2006(E) Source compositions of large tephra-production eruptions in Alaska 2024-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Lubbers, Jordan originator Loewen, M.W. originator Wallace, Kristi originator Coombs, M.L. originator https://doi.org/10.14509/31091 CSV Raw Data File RDF 2023-26 3 p. Source 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 All samples have been archived in the Geologic Database of Information on Volcanoes in Alaska (GeoDIVA; Cameron and others, 2022, doi.org/10.14509/geodiva).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. 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. completed Alaska Division of Geological & Geophysical Surveys Metadata Manager (907)451-5020 (907)451-5050 3354 College Road Fairbanks AK 99709-3707 USA dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays Please 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. pointOfContact notPlanned Active Volcanoes Analyses Analyses and Sampling Analytical Lab Results Analytical Results Ashfall Chemistry Coastal Coastal and River DGGS Geochemical Data Geochemistry Geochronology Geologic Geologic Hazards Geological Process Geology Glass Hazards Igneous Lab Methods Laser Ablation Methods Microprobe Analysis Pyroclastics Rhyolite Sample Location Statistics Tephra Trace Elements Volcanic Volcanic Ash Volcanic Eruption Volcanic Rocks Volcaniclastic Deposits Volcaniclastics Volcanoes Volcanology theme Alaska Division of Geological & Geophysical Surveys Adagdak Akutan Volcano Alaska Range Aleutian Islands Aleutian Peninsula Aniakchak Caldera Arch Rock Ashishik Point Black Creek Black Lake Black Nose Bristol Bay Bunker Hill Buttress Range Cave Rock Cold Bay Emmons Lake Caldera Expedition Island Falling Mountain Fish Rock Fisher Caldera Gareloi Goblers Knob Hayes River Hayes Volcano Hidden Creek Iliuliuk Harbor Kaguyak Katmai Katmai Caldera Mageik Creek Makushin Makushin Volcano Mount Churchill Mount Veniaminof North Creek Novarupta Okmok Semisopochnoi South Channel Spring Creek Tuscarora Rock Ukinrek Maars Unalaska Unalaska Bay Unalaska Lake Veniaminof place Alaska Division of Geological & Geophysical Surveys 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. otherRestrictions 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. otherRestrictions 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). Glass electron microprobe analyses methods, precision and accuracy for tephra studies in Alaska 2023-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Loewen, M.W. originator Wallace, K.L. originator Lubbers, Jordan originator Ruth, Dawn originator Izbekov, P.E. originator Larsen, J.F. originator Graham, Nathan originator https://doi.org/10.14509/31045 Miscellaneous Publication MP 174 20 p crossReference Tephra samples and analyses from Cook Inlet source volcanoes and Anchor Point, Alaska 2024-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Loewen, M.W. originator Wallace, Kristi originator Coombs, M.L. originator Mulliken, K.M. originator https://doi.org/10.14509/31090 Raw Data File RDF 2023-25 4 p crossReference Geospatial distribution of tephra fall in Alaska: a geodatabase compilation of published tephra fall occurrences from the Pleistocene to the present 2018-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Mulliken, K.M. originator Schaefer, J.R. originator Cameron, C.E. originator https://doi.org/10.14509/29847 Miscellaneous Publication MP 164 46 p crossReference Major-oxide and trace-element geochemical data from the tephra collected on Veniaminof volcano, Alaska 2020-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Wallace, K.L. originator Cameron, C.E. originator Waythomas, C.F. originator Perreault, J.M. originator https://doi.org/10.14509/30578 Raw Data File RDF 2020-17 5 p crossReference Major-element glass compositions of tephra from the circa 3.6 ka eruption of Aniakchak volcano, Alaska Peninsula, Alaska 2017-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Wallace, K.L. originator Hayden, L.A. originator Neal, C.A. originator https://doi.org/10.14509/29777 Raw Data File RDF 2017-9 9 p crossReference Tephra occurrence in Alaska: a map-based compilation of stratigraphic tephra data 2018-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Worden, A.K. originator Schaefer, J.R. originator Mulliken, K.M. originator https://doi.org/10.14509/30059 Miscellaneous Publication MP 165 19 p crossReference vector eng; USA geoscientificInformation -178.790000 -180.000000 51.760000 63.000000 1992-01-01 2023-01-01 >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 “short” (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. true csv unknown Alaska Division of Geological & Geophysical Surveys Metadata Manager (907)451-5020 (907)451-5050 3354 College Road Fairbanks AK 99709-3707 USA dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays Please 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. distributor Contact DGGS for current pricing Free download https://doi.org/10.14509/31091 csv table information dataset Horizontal Positional Accuracy Report 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. This data releaase is complete. This data releaase is complete. Not applicable This lineage was generated by the FGDC CSDGM to 19139 transformation 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. 2021-01-01T00:00:00 Electron 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). 2022-01-01T00:00:00 Laser 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 µm 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. 2022-01-01T00:00:00 otherRestrictions 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. unknown This metadata was automatically generated from the FGDC Content Standard for Digital Geospatial Metadata standard (version FGDC-STD-001-1998) using the 2019-08-12T11:11:00 version of the FGDC CSDGM to ISO 19139 transform. Simone Montayne Alaska Division of Geological & Geophysical Surveys Metadata Manager (907)451-5020 (907)451-5050 3354 College Road Fairbanks AK 99709-3707 USA dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays pointOfContact